99 # valuable if I stay in bed after the sun has risen. As an admirer
100 # of moonlight I resent the bossy insistence of those who want to
101 # reduce my time for enjoying it. At the back of the Daylight Saving
102 # scheme I detect the bony, blue-fingered hand of Puritanism, eager
103 # to push people into bed earlier, and get them up earlier, to make
104 # them healthy, wealthy and wise in spite of themselves.
105 #
106 # -- Robertson Davies, The diary of Samuel Marchbanks,
107 # Clarke, Irwin (1947), XIX, Sunday
108 #
109 # For more about the first ten years of DST in the United States, see
110 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
111 # (Carnegie Library of Pittsburgh, 1927).
112 # http://www.clpgh.org/exhibit/dst.html
113 #
114 # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
115 # However, DST was imposed by the Standard Time Act of 1918, which
116 # was the first nationwide legal time standard, and apparently
117 # time was just called "Standard Time" or "Daylight Saving Time".
118
119 # From Arthur David Olson:
120 # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
121 # See, for example, the front page of the Saturday, 1974-10-26
122 # and Sunday, 1974-10-27 editions of the Washington Post.
123
124 # From Arthur David Olson:
125 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
126 # Daylight Saving Time in the US was by local option, except during wartime.
127
128 # From Arthur David Olson (2000-09-25):
129 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
130 # In the introduction, Oboler spoke of "Eastern Peace Time."
131 # An AltaVista search turned up:
132 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html
133 # "When the time is announced over the radio now, it is 'Eastern Peace
134 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
135 # (August 1945) by way of confirmation.
136 #
137 # From Paul Eggert (2017-09-23):
138 # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
139
140 # From Joseph Gallant citing
141 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
142 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
158 # importance."
159 #
160 # On Aug. 14, stalling while talking steadily into the NBC networks' open
161 # microphone, St. John heard five bells and waited only to hear a sixth bell,
162 # before announcing confidently: "Ladies and gentlemen, World War II is over.
163 # The Japanese have agreed to our surrender terms."
164 #
165 # He had scored a 20-second scoop on other broadcasters.
166
167 # From Arthur David Olson (2005-08-22):
168 # Paul has been careful to use the "US" rules only in those locations
169 # that are part of the United States; this reflects the real scope of
170 # U.S. government action. So even though the "US" rules have changed
171 # in the latest release, other countries won't be affected.
172
173 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
174 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
175 Rule US 1918 1919 - Oct lastSun 2:00 0 S
176 Rule US 1942 only - Feb 9 2:00 1:00 W # War
177 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
178 Rule US 1945 only - Sep lastSun 2:00 0 S
179 Rule US 1967 2006 - Oct lastSun 2:00 0 S
180 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
181 Rule US 1974 only - Jan 6 2:00 1:00 D
182 Rule US 1975 only - Feb 23 2:00 1:00 D
183 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
184 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
185 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
186 Rule US 2007 max - Nov Sun>=1 2:00 0 S
187
188 # From Arthur David Olson, 2005-12-19
189 # We generate the files specified below to guard against old files with
190 # obsolete information being left in the time zone binary directory.
191 # We limit the list to names that have appeared in previous versions of
192 # this time zone package.
193 # We do these as separate Zones rather than as Links to avoid problems if
194 # a particular place changes whether it observes DST.
195 # We put these specifications here in the northamerica file both to
196 # increase the chances that they'll actually get compiled and to
197 # avoid the need to duplicate the US rules in another file.
198
199 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
200 Zone EST -5:00 - EST
201 Zone MST -7:00 - MST
202 Zone HST -10:00 - HST
203 Zone EST5EDT -5:00 US E%sT
204 Zone CST6CDT -6:00 US C%sT
205 Zone MST7MDT -7:00 US M%sT
206 Zone PST8PDT -8:00 US P%sT
207
208 # From U. S. Naval Observatory (1989-01-19):
209 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
210 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
211 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
212 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
213 # USA MOUNTAIN 7 H BEHIND UTC DENVER
214 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
215 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
216 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
217 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
218 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
219 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
336 # Four cities are involved. The two not mentioned above are Smiths Station
337 # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started
338 # because West Point Pepperell textile mills were in Alabama while the
339 # corporate office was in Georgia, and residents voted to keep Eastern
340 # time even after the mills closed. See: Kazek K. Did you know which
341 # Alabama towns are in a different time zone? al.com 2017-02-06.
342 # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html
343
344 # From Paul Eggert (2014-09-06):
345 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
346 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
347 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the
348 # nearest second.
349
350 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
351 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
352 Rule NYC 1920 only - Oct lastSun 2:00 0 S
353 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
354 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
355 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
356 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
357 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
358 -5:00 US E%sT 1920
359 -5:00 NYC E%sT 1942
360 -5:00 US E%sT 1946
361 -5:00 NYC E%sT 1967
362 -5:00 US E%sT
363
364 # US central time, represented by Chicago
365
366 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
367 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
368 # Washington counties), Illinois, western Indiana
369 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
370 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
371 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
372 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
373 # western Tennessee, most of Texas, Wisconsin
374
375 # From Paul Eggert (2018-01-07):
376 # In 1869 the Chicago Astronomical Society contracted with the city to keep
396 # Statue 175 closer in synch with the US Congress' intent....
397 # https://docs.legis.wisconsin.gov/2007/related/acts/3
398
399 # From an email administrator of the City of Fort Pierre, SD (2015-12-21):
400 # Fort Pierre is technically located in the Mountain time zone as is
401 # the rest of Stanley County. Most of Stanley County and Fort Pierre
402 # uses the Central time zone due to doing most of their business in
403 # Pierre so it simplifies schedules. I have lived in Stanley County
404 # all my life and it has been that way since I can remember. (43 years!)
405 #
406 # From Paul Eggert (2015-12-25):
407 # Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
408
409 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
410 Rule Chicago 1920 only - Jun 13 2:00 1:00 D
411 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
412 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
413 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
414 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
415 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
416 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
417 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
418 -6:00 US C%sT 1920
419 -6:00 Chicago C%sT 1936 Mar 1 2:00
420 -5:00 - EST 1936 Nov 15 2:00
421 -6:00 Chicago C%sT 1942
422 -6:00 US C%sT 1946
423 -6:00 Chicago C%sT 1967
424 -6:00 US C%sT
425 # Oliver County, ND switched from mountain to central time on 1992-10-25.
426 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
427 -7:00 US M%sT 1992 Oct 25 2:00
428 -6:00 US C%sT
429 # Morton County, ND, switched from mountain to central time on
430 # 2003-10-26, except for the area around Mandan which was already central time.
431 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
432 # Officially this switch also included part of Sioux County, and
433 # Jones, Mellette, and Todd Counties in South Dakota;
434 # but in practice these other counties were already observing central time.
435 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
436 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
464 #
465 # From Paul Eggert (2018-10-25):
466 # On 1921-03-04 federal law placed all of Texas into the central time zone.
467 # However, El Paso ignored the law for decades and continued to observe
468 # mountain time, on the grounds that that's what they had always done
469 # and they weren't about to let the federal government tell them what to do.
470 # Eventually the federal government gave in and changed the law on
471 # 1970-04-10 to match what El Paso was actually doing. Although
472 # that's slightly after our 1970 cutoff, there is no need to create a
473 # separate zone for El Paso since they were ignoring the law anyway. See:
474 # Long T. El Pasoans were time rebels, fought to stay in Mountain zone.
475 # El Paso Times. 2018-10-24 06:40 -06.
476 # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/
477 #
478 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
479 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
480 Rule Denver 1920 only - Oct lastSun 2:00 0 S
481 Rule Denver 1921 only - May 22 2:00 0 S
482 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
483 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
484 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
485 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
486 -7:00 US M%sT 1920
487 -7:00 Denver M%sT 1942
488 -7:00 US M%sT 1946
489 -7:00 Denver M%sT 1967
490 -7:00 US M%sT
491
492 # US Pacific time, represented by Los Angeles
493 #
494 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
495 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
496 # north of the Salmon River, and the towns of Burgdorf and Warren),
497 # Nevada (except West Wendover), Oregon (except the northern ¾ of
498 # Malheur county), and Washington
499
500 # From Paul Eggert (2016-08-20):
501 # In early February 1948, in response to California's electricity shortage,
502 # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
503 # causing electric clocks to lose six minutes per day. (This did not change
504 # legal time, and is not part of the data here.) See:
517 # to speculate that the objections to Daylight Saving Time were one important
518 # factor in the defeat of the Dewey-Warren Presidential ticket in California.
519 # -- Ross, p 25
520 #
521 # On December 8 the governor exercised the option, setting the date to January 1
522 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01).
523 #
524 # Despite the controversy, in 1949 California voters approved Proposition 12,
525 # which established DST from April's last Sunday at 01:00 until September's
526 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
527 # the fall-back date to October's last Sunday. See:
528 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
529 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
530 #
531 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
532 Rule CA 1948 only - Mar 14 2:01 1:00 D
533 Rule CA 1949 only - Jan 1 2:00 0 S
534 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
535 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
536 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
537 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
538 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
539 -8:00 US P%sT 1946
540 -8:00 CA P%sT 1967
541 -8:00 US P%sT
542
543 # Alaska
544 # AK%sT is the modern abbreviation for -09 per USNO.
545 #
546 # From Paul Eggert (2017-06-15):
547 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
548 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
549 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
550 # Russian forts and fleet at Sitka fired salutes to mark the ceremony of
551 # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2.
552 # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
553 # Sitka workers did not change their calendars until Sunday, 1867-10-20,
554 # and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P).
555 # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
556 # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
557 # Include only the time zone part of this transition, ignoring the switch
625 # From Ryan Stanley (2018-11-06):
626 # The Metlakatla community in Alaska has decided not to change its
627 # clock back an hour starting on November 4th, 2018 (day before yesterday).
628 # They will be gmtoff=-28800 year-round.
629 # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/
630
631 # From Paul Eggert (2018-12-16):
632 # In a 2018-12-11 special election, Metlakatla voted to go back to
633 # Alaska time (including daylight saving time) starting next year.
634 # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
635 #
636 # From Ryan Stanley (2019-01-11):
637 # The community will be changing back on the 20th of this month...
638 # From Tim Parenti (2019-01-11):
639 # Per an announcement on the Metlakatla community's official Facebook page, the
640 # "fall back" will be on Sunday 2019-01-20 at 02:00:
641 # https://www.facebook.com/141055983004923/photos/607150969728753/
642 # So they won't be waiting for Alaska to join them on 2019-03-10, but will
643 # rather change their clocks twice in seven weeks.
644
645 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
646 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32
647 -8:57:41 - LMT 1900 Aug 20 12:00
648 -8:00 - PST 1942
649 -8:00 US P%sT 1946
650 -8:00 - PST 1969
651 -8:00 US P%sT 1980 Apr 27 2:00
652 -9:00 US Y%sT 1980 Oct 26 2:00
653 -8:00 US P%sT 1983 Oct 30 2:00
654 -9:00 US Y%sT 1983 Nov 30
655 -9:00 US AK%sT
656 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30
657 -9:01:13 - LMT 1900 Aug 20 12:00
658 -8:00 - PST 1942
659 -8:00 US P%sT 1946
660 -8:00 - PST 1969
661 -8:00 US P%sT 1983 Oct 30 2:00
662 -9:00 US Y%sT 1983 Nov 30
663 -9:00 US AK%sT
664 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55
665 -8:46:18 - LMT 1900 Aug 20 12:00
745 # and Act 163 (approved 21 May 1933)."
746
747 # From Arthur David Olson (2011-01-19):
748 # The following is from "Laws of the Territory of Hawaii Passed by the
749 # Seventeenth Legislature: Regular Session 1933," available (as of
750 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act
751 # 90...At 2 o'clock ante meridian of the last Sunday in April of each
752 # year, the standard time of this Territory shall be advanced one
753 # hour...This Act shall take effect upon its approval. Approved this 26th
754 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
755 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
756 # hereby repealed...This Act shall take effect upon its approval, upon
757 # which date the standard time of this Territory shall be restored to
758 # that existing immediately prior to the taking effect of said Act 90.
759 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
760 # of the Territory of Hawaii."
761 #
762 # Note that 1933-05-21 was a Sunday.
763 # We're left to guess the time of day when Act 163 was approved; guess noon.
764
765 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
766 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00
767 -10:30 - HST 1933 Apr 30 2:00
768 -10:30 1:00 HDT 1933 May 21 12:00
769 -10:30 US H%sT 1947 Jun 8 2:00
770 -10:00 - HST
771
772 # Now we turn to US areas that have diverged from the consensus since 1970.
773
774 # Arizona mostly uses MST.
775
776 # From Paul Eggert (2002-10-20):
777 #
778 # The information in the rest of this paragraph is derived from the
779 # Daylight Saving Time web page
780 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
781 # maintained by the Arizona State Library, Archives and Public Records.
782 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
783 # time, but by federal law railroads, airlines, bus lines, military
784 # personnel, and some engaged in interstate commerce continued to
785 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
786 # Gazette says that was the date the law changed, and that 04-01 was
787 # the date the state's clocks would change. In 1945 the State of
788 # Arizona used standard time all year, again with exceptions only as
789 # mandated by federal law. Arizona observed DST in 1967, but Arizona
790 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
791 #
792 # Shanks says the 1944 experiment came to an end on 1944-03-17.
793 # Go with the Arizona State Library instead.
794
795 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
796 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42
797 -7:00 US M%sT 1944 Jan 1 0:01
798 -7:00 - MST 1944 Apr 1 0:01
799 -7:00 US M%sT 1944 Oct 1 0:01
800 -7:00 - MST 1967
801 -7:00 US M%sT 1968 Mar 21
802 -7:00 - MST
803 # From Arthur David Olson (1988-02-13):
804 # A writer from the Inter Tribal Council of Arizona, Inc.,
805 # notes in private correspondence dated 1987-12-28 that "Presently, only the
806 # Navajo Nation participates in the Daylight Saving Time policy, due to its
807 # large size and location in three states." (The "only" means that other
808 # tribal nations don't use DST.)
809 #
810 # From Paul Eggert (2013-08-26):
811 # See America/Denver for a zone appropriate for the Navajo Nation.
812
813 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
814 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
815 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
816 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
817 # Teton, Twin Falls, Valley, Washington counties, and the southern
818 # quarter of Idaho county) and eastern Oregon (most of Malheur County)
819 # switched four weeks late in 1974.
820 #
821 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
822 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
823 -8:00 US P%sT 1923 May 13 2:00
824 -7:00 US M%sT 1974
825 -7:00 - MST 1974 Feb 3 2:00
826 -7:00 US M%sT
827
828 # Indiana
829 #
830 # For a map of Indiana's time zone regions, see:
831 # https://en.wikipedia.org/wiki/Time_in_Indiana
832 #
833 # From Paul Eggert (2018-11-30):
834 # A brief but entertaining history of time in Indiana describes a 1949 debate
835 # in the Indiana House where city legislators (who favored "fast time")
836 # tussled with farm legislators (who didn't) over a bill to outlaw DST:
837 # "Lacking enough votes, the city faction tries to filibuster until time runs
838 # out on the session at midnight, but rural champion Rep. Herbert Copeland,
839 # R-Madison, leans over the gallery railing and forces the official clock
840 # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the
841 # debate rages on into the night. The filibuster finally dies out and the
873 # From Paul Eggert (2014-06-26):
874 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
875 # says "DOT is relocating the time zone boundary in Indiana to move Starke,
876 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
877 # Eastern Time Zone to the Central Time Zone.... The effective date of
878 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
879 # changeover date from standard time to Daylight Saving Time."
880 # Strictly speaking, this meant the affected counties changed their
881 # clocks twice that night, but this obviously was in error. The intent
882 # was that 01:59:59 EST be followed by 02:00:00 CDT.
883
884 # From Gwillim Law (2007-02-10):
885 # The Associated Press has been reporting that Pulaski County, Indiana is
886 # going to switch from Central to Eastern Time on March 11, 2007....
887 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
888
889 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
890 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
891 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
892 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
893 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
894 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
895 -6:00 US C%sT 1920
896 -6:00 Indianapolis C%sT 1942
897 -6:00 US C%sT 1946
898 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
899 -5:00 - EST 1957 Sep 29 2:00
900 -6:00 - CST 1958 Apr 27 2:00
901 -5:00 - EST 1969
902 -5:00 US E%sT 1971
903 -5:00 - EST 2006
904 -5:00 US E%sT
905 #
906 # Eastern Crawford County, Indiana, left its clocks alone in 1974,
907 # as well as from 1976 through 2005.
908 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
909 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
910 Rule Marengo 1951 only - Sep lastSun 2:00 0 S
911 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
912 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
913 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
914 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
915 -6:00 US C%sT 1951
916 -6:00 Marengo C%sT 1961 Apr 30 2:00
917 -5:00 - EST 1969
918 -5:00 US E%sT 1974 Jan 6 2:00
919 -6:00 1:00 CDT 1974 Oct 27 2:00
920 -5:00 US E%sT 1976
921 -5:00 - EST 2006
922 -5:00 US E%sT
923 #
924 # Daviess, Dubois, Knox, and Martin Counties, Indiana,
925 # switched from eastern to central time in April 2006, then switched back
926 # in November 2007.
927 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
928 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
929 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
930 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
931 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
932 Rule Vincennes 1955 only - May 1 0:00 1:00 D
933 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
934 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
935 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
936 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
937 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
938 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
939 -6:00 US C%sT 1946
940 -6:00 Vincennes C%sT 1964 Apr 26 2:00
941 -5:00 - EST 1969
942 -5:00 US E%sT 1971
943 -5:00 - EST 2006 Apr 2 2:00
944 -6:00 US C%sT 2007 Nov 4 2:00
945 -5:00 US E%sT
946 #
947 # Perry County, Indiana, switched from eastern to central time in April 2006.
948 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
949 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D
950 Rule Perry 1946 only - Sep lastSun 2:00 0 S
951 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D
952 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S
953 Rule Perry 1955 only - May 1 0:00 1:00 D
954 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
955 Rule Perry 1960 only - Oct lastSun 2:00 0 S
956 Rule Perry 1961 only - Sep lastSun 2:00 0 S
957 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S
958 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
959 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57
960 -6:00 US C%sT 1946
961 -6:00 Perry C%sT 1964 Apr 26 2:00
962 -5:00 - EST 1969
963 -5:00 US E%sT 1971
964 -5:00 - EST 2006 Apr 2 2:00
965 -6:00 US C%sT
966 #
967 # Pike County, Indiana moved from central to eastern time in 1977,
968 # then switched back in 2006, then switched back again in 2007.
969 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
970 Rule Pike 1955 only - May 1 0:00 1:00 D
971 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
972 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
973 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
974 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
975 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
976 -6:00 US C%sT 1955
977 -6:00 Pike C%sT 1965 Apr 25 2:00
978 -5:00 - EST 1966 Oct 30 2:00
979 -6:00 US C%sT 1977 Oct 30 2:00
980 -5:00 - EST 2006 Apr 2 2:00
981 -6:00 US C%sT 2007 Nov 4 2:00
982 -5:00 US E%sT
983 #
984 # Starke County, Indiana moved from central to eastern time in 1991,
985 # then switched back in 2006.
986 # From Arthur David Olson (1991-10-28):
987 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
988 # notes that Starke County switched from Central time to Eastern time as of
989 # 1991-10-27.
990 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
991 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
992 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
993 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
994 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
995 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
996 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
997 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
998 -6:00 US C%sT 1947
999 -6:00 Starke C%sT 1962 Apr 29 2:00
1000 -5:00 - EST 1963 Oct 27 2:00
1001 -6:00 US C%sT 1991 Oct 27 2:00
1002 -5:00 - EST 2006 Apr 2 2:00
1003 -6:00 US C%sT
1004 #
1005 # Pulaski County, Indiana, switched from eastern to central time in
1006 # April 2006 and then switched back in March 2007.
1007 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1008 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
1009 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
1010 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
1011 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
1012 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1013 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35
1014 -6:00 US C%sT 1946
1015 -6:00 Pulaski C%sT 1961 Apr 30 2:00
1016 -5:00 - EST 1969
1017 -5:00 US E%sT 1971
1018 -5:00 - EST 2006 Apr 2 2:00
1019 -6:00 US C%sT 2007 Mar 11 2:00
1020 -5:00 US E%sT
1021 #
1022 # Switzerland County, Indiana, did not observe DST from 1973 through 2005.
1023 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1024 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
1025 -6:00 US C%sT 1954 Apr 25 2:00
1026 -5:00 - EST 1969
1027 -5:00 US E%sT 1973
1028 -5:00 - EST 2006
1029 -5:00 US E%sT
1030
1031 # From Paul Eggert (2018-03-20):
1032 # The Louisville & Nashville Railroad's 1883-11-18 change occurred at
1033 # 10:00 old local time; train were supposed to come to a standstill
1034 # for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not
1035 # clear how this matched civil time in Louisville, so for now continue
1036 # to assume Louisville switched at noon new local time, like New York.
1037 #
1038 # Part of Kentucky left its clocks alone in 1974.
1039 # This also includes Clark, Floyd, and Harrison counties in Indiana.
1040 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1041 Rule Louisville 1921 only - May 1 2:00 1:00 D
1042 Rule Louisville 1921 only - Sep 1 2:00 0 S
1043 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
1044 Rule Louisville 1941 only - Sep lastSun 2:00 0 S
1045 Rule Louisville 1946 only - Jun 2 2:00 0 S
1046 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
1047 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
1048 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1049 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
1050 -6:00 US C%sT 1921
1051 -6:00 Louisville C%sT 1942
1052 -6:00 US C%sT 1946
1053 -6:00 Louisville C%sT 1961 Jul 23 2:00
1054 -5:00 - EST 1968
1055 -5:00 US E%sT 1974 Jan 6 2:00
1056 -6:00 1:00 CDT 1974 Oct 27 2:00
1057 -5:00 US E%sT
1058 #
1059 # Wayne County, Kentucky
1060 #
1061 # From Lake Cumberland LIFE
1062 # http://www.lake-cumberland.com/life/archive/news990129time.shtml
1063 # (1999-01-29) via WKYM-101.7:
1064 # Clinton County has joined Wayne County in asking the DoT to change from
1065 # the Central to the Eastern time zone.... The Wayne County government made
1066 # the same request in December. And while Russell County officials have not
1067 # taken action, the majority of respondents to a poll conducted there in
1068 # August indicated they would like to change to "fast time" also.
1134 # one hour in 1914." This change is not in Shanks. We have no more
1135 # info, so omit this for now.
1136 #
1137 # From Paul Eggert (2017-07-26):
1138 # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01
1139 # until 10-29 00:01, I now see multiple reports that this is incorrect.
1140 # For example, according to a 50-year anniversary report about the 1967
1141 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time
1142 # the last fly ball of the doubleheader settled into the glove of leftfielder
1143 # Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving
1144 # time, so light was already starting to fail. Twilight was made even deeper
1145 # by billowing columns of smoke that ascended in an unbroken wall north of the
1146 # ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two
1147 # at home vs. Yankees. Detroit Free Press 2017-07-23.
1148 # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/
1149 #
1150 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1151 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1152 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
1153 Rule Detroit 1948 only - Sep lastSun 2:00 0 S
1154 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1155 Zone America/Detroit -5:32:11 - LMT 1905
1156 -6:00 - CST 1915 May 15 2:00
1157 -5:00 - EST 1942
1158 -5:00 US E%sT 1946
1159 -5:00 Detroit E%sT 1973
1160 -5:00 US E%sT 1975
1161 -5:00 - EST 1975 Apr 27 2:00
1162 -5:00 US E%sT
1163 #
1164 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
1165 # switched from EST to CST/CDT in 1973.
1166 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1167 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
1168 Rule Menominee 1946 only - Sep lastSun 2:00 0 S
1169 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
1170 Rule Menominee 1966 only - Oct lastSun 2:00 0 S
1171 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1172 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
1173 -6:00 US C%sT 1946
1174 -6:00 Menominee C%sT 1969 Apr 27 2:00
1175 -5:00 - EST 1973 Apr 29 2:00
1176 -6:00 US C%sT
1177
1178 # Navassa
1179 # administered by the US Fish and Wildlife Service
1180 # claimed by US under the provisions of the 1856 Guano Islands Act
1181 # also claimed by Haiti
1182 # occupied 1857/1900 by the Navassa Phosphate Co
1183 # US lighthouse 1917/1996-09
1184 # currently uninhabited
1185 # see Mark Fineman, "An Isle Rich in Guano and Discord",
1186 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1187 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
1188
1189 ################################################################################
1190
1191
1385 # changes to the Newfoundland Standard Time Act have been proclaimed.
1386 # The change in the Act stipulates that the change from Daylight Savings
1387 # Time to Standard Time and from Standard Time to Daylight Savings Time
1388 # now occurs at 2:00AM.
1389 # ...
1390 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1391 # ...
1392 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery
1393 # Office of the Chief Information Officer
1394 # Executive Council
1395 # Government of Newfoundland & Labrador
1396
1397 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
1398 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
1399 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
1400 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1401 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D
1402 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S
1403 #
1404 # St John's has an apostrophe, but Posix file names can't have apostrophes.
1405 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1406 Zone America/St_Johns -3:30:52 - LMT 1884
1407 -3:30:52 StJohns N%sT 1918
1408 -3:30:52 Canada N%sT 1919
1409 -3:30:52 StJohns N%sT 1935 Mar 30
1410 -3:30 StJohns N%sT 1942 May 11
1411 -3:30 Canada N%sT 1946
1412 -3:30 StJohns N%sT 2011 Nov
1413 -3:30 Canada N%sT
1414
1415 # most of east Labrador
1416
1417 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1418 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1419 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1420 -3:30:52 - NST 1918
1421 -3:30:52 Canada N%sT 1919
1422 -3:30:52 - NST 1935 Mar 30
1423 -3:30 - NST 1936
1424 -3:30 StJohns N%sT 1942 May 11
1425 -3:30 Canada N%sT 1946
1426 -3:30 StJohns N%sT 1966 Mar 15 2:00
1427 -4:00 StJohns A%sT 2011 Nov
1428 -4:00 Canada A%sT
1429
1430
1431 # west Labrador, Nova Scotia, Prince Edward I
1432
1433 # From Brian Inglis (2015-07-20):
1434 # From the historical weather station records available at:
1435 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1436 # Sydney shares the same time history as Glace Bay, so was
1437 # likely to be the same across the island....
1438 # Sydney, as the capital and most populous location, or Cape Breton, would
1472 Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1473 Rule Halifax 1933 only - Oct 2 0:00 0 S
1474 Rule Halifax 1934 only - May 20 0:00 1:00 D
1475 Rule Halifax 1934 only - Sep 16 0:00 0 S
1476 Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1477 Rule Halifax 1935 only - Sep 30 0:00 0 S
1478 Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1479 Rule Halifax 1936 only - Sep 14 0:00 0 S
1480 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1481 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1482 Rule Halifax 1939 only - May 28 0:00 1:00 D
1483 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1484 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1485 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1486 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1487 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1488 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1489 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1490 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1491 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
1492 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1493 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
1494 -4:00 Halifax A%sT 1918
1495 -4:00 Canada A%sT 1919
1496 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1497 -4:00 Canada A%sT 1946
1498 -4:00 Halifax A%sT 1974
1499 -4:00 Canada A%sT
1500 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1501 -4:00 Canada A%sT 1953
1502 -4:00 Halifax A%sT 1954
1503 -4:00 - AST 1972
1504 -4:00 Halifax A%sT 1974
1505 -4:00 Canada A%sT
1506
1507 # New Brunswick
1508
1509 # From Paul Eggert (2007-01-31):
1510 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1511 # says they changed at 00:01 through 2006, and
1512 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1513 # clear that this was the case since at least 1993.
1514 # For now, assume it started in 1993.
1515
1516 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1517 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1518 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1519 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1520 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1521 Rule Moncton 1939 only - May 27 1:00 1:00 D
1522 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1523 Rule Moncton 1940 only - May 19 1:00 1:00 D
1524 Rule Moncton 1941 only - May 4 1:00 1:00 D
1525 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1526 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1527 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1528 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1529 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1530 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1531 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1532 -5:00 - EST 1902 Jun 15
1533 -4:00 Canada A%sT 1933
1534 -4:00 Moncton A%sT 1942
1535 -4:00 Canada A%sT 1946
1536 -4:00 Moncton A%sT 1973
1537 -4:00 Canada A%sT 1993
1538 -4:00 Moncton A%sT 2007
1539 -4:00 Canada A%sT
1540
1541 # Quebec
1542
1543 # From Paul Eggert (2015-03-24):
1544 # See America/Toronto for most of Quebec, including Montreal.
1545 #
1546 # Matthews and Vincent (1998) also write that Quebec east of the -63
1547 # meridian is supposed to observe AST, but residents as far east as
1548 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1549 # The Quebec department of justice writes in
1550 # "The situation in Minganie and Basse-Côte-Nord"
1551 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1552 # that the coastal strip from just east of Natashquan to Blanc-Sablon
1553 # observes Atlantic standard time all year round.
1554 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1555 # says this common practice was codified into law as of 2007.
1556 # For lack of better info, guess this practice began around 1970, contra to
1557 # Shanks & Pottenger who have this region observing AST/ADT.
1558
1559 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1560 Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1561 -4:00 Canada A%sT 1970
1562 -4:00 - AST
1563
1564 # Ontario
1565
1566 # From Paul Eggert (2006-07-09):
1567 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1568 # Toronto.
1569 # Thunder Bay skipped DST in 1973.
1570 # Many smaller locales did not observe peacetime DST until 1974;
1571 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1572 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1573
1574 # From Mark Brader (2003-07-26):
1575 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1576 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1577 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1578 # have already done so. In Orillia DST was to run until Saturday,
1579 # 1912-08-31 (no time mentioned), but it was met with considerable
1707 # Manitoba Not used.
1708 # Saskatchewan In Regina only.
1709 # Alberta Not used.
1710 # British Columbia Not used.
1711 #
1712 # With some exceptions, the use of daylight saving may be said to be limited
1713 # to those cities and towns lying between Quebec city and Windsor, Ont.
1714
1715 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1716 Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1717 Rule Toronto 1919 only - Oct 26 0:00 0 S
1718 Rule Toronto 1920 only - May 2 2:00 1:00 D
1719 Rule Toronto 1920 only - Sep 26 0:00 0 S
1720 Rule Toronto 1921 only - May 15 2:00 1:00 D
1721 Rule Toronto 1921 only - Sep 15 2:00 0 S
1722 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
1723 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1724 # was meant.
1725 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1726 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1727 # The 1927-to-1939 rules can be expressed more simply as
1728 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1729 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1730 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1731 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1732 # The rules below avoid use of Sun>=25
1733 # (which pre-2004 versions of zic cannot handle).
1734 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S
1735 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D
1736 Rule Toronto 1932 only - May 1 2:00 1:00 D
1737 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D
1738 Rule Toronto 1933 only - Oct 1 2:00 0 S
1739 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S
1740 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
1741 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
1742 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
1743 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S
1744 Rule Toronto 1949 only - Nov lastSun 0:00 0 S
1745 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
1746 Rule Toronto 1950 only - Nov lastSun 2:00 0 S
1747 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
1748 # Shanks & Pottenger say Toronto ended DST a week early in 1971,
1749 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1750 # is wrong, and that he had confirmed it by checking the 1971-10-30
1751 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1752 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1753
1754 # From Paul Eggert (2003-07-27):
1755 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1756 # Port Arthur, Ontario, the principle of the Bill has been in
1757 # operation for the past three years, and in the City of Moose Jaw,
1758 # Saskatchewan, for one year."
1759
1760 # From David Bryan via Tory Tronrud, Director/Curator,
1761 # Thunder Bay Museum (2003-11-12):
1762 # There is some suggestion, however, that, by-law or not, daylight
1763 # savings time was being practiced in Fort William and Port Arthur
1764 # before 1909.... [I]n 1910, the line between the Eastern and Central
1765 # Time Zones was permanently moved about two hundred miles west to
1766 # include the Thunder Bay area.... When Canada adopted daylight
1767 # savings time in 1916, Fort William and Port Arthur, having done so
1768 # already, did not change their clocks.... During the Second World
1769 # War,... [t]he cities agreed to implement DST during the summer
1770 # months for the remainder of the war years.
1771
1772 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1773 Zone America/Toronto -5:17:32 - LMT 1895
1774 -5:00 Canada E%sT 1919
1775 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1776 -5:00 Canada E%sT 1946
1777 -5:00 Toronto E%sT 1974
1778 -5:00 Canada E%sT
1779 Zone America/Thunder_Bay -5:57:00 - LMT 1895
1780 -6:00 - CST 1910
1781 -5:00 - EST 1942
1782 -5:00 Canada E%sT 1970
1783 -5:00 Toronto E%sT 1973
1784 -5:00 - EST 1974
1785 -5:00 Canada E%sT
1786 Zone America/Nipigon -5:53:04 - LMT 1895
1787 -5:00 Canada E%sT 1940 Sep 29
1788 -5:00 1:00 EDT 1942 Feb 9 2:00s
1789 -5:00 Canada E%sT
1790 Zone America/Rainy_River -6:18:16 - LMT 1895
1791 -6:00 Canada C%sT 1940 Sep 29
1792 -6:00 1:00 CDT 1942 Feb 9 2:00s
1827 Rule Winn 1937 only - May 16 2:00 1:00 D
1828 Rule Winn 1937 only - Sep 26 2:00 0 S
1829 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1830 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
1831 Rule Winn 1945 only - Sep lastSun 2:00 0 S
1832 Rule Winn 1946 only - May 12 2:00 1:00 D
1833 Rule Winn 1946 only - Oct 13 2:00 0 S
1834 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1835 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1836 Rule Winn 1950 only - May 1 2:00 1:00 D
1837 Rule Winn 1950 only - Sep 30 2:00 0 S
1838 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1839 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1840 Rule Winn 1959 only - Oct lastSun 2:00 0 S
1841 Rule Winn 1960 only - Sep lastSun 2:00 0 S
1842 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1843 Rule Winn 1963 only - Sep 22 2:00 0 S
1844 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1845 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1846 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
1847 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1848 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
1849 -6:00 Winn C%sT 2006
1850 -6:00 Canada C%sT
1851
1852
1853 # Saskatchewan
1854
1855 # From Mark Brader (2003-07-26):
1856 # The first actual adoption of DST in Canada was at the municipal
1857 # level. As the [Toronto] Star put it (1912-06-07), "While people
1858 # elsewhere have long been talking of legislation to save daylight,
1859 # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1860 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1861 # presumably late evening, as below), and would run until "the end of
1862 # the summer". The discrepancy between municipal time and railroad
1863 # time was noted.
1864
1865 # From Paul Eggert (2003-07-27):
1866 # Willett (1914-03) notes that DST "has been in operation ... in the
1867 # City of Moose Jaw, Saskatchewan, for one year."
1868
1869 # From Paul Eggert (2006-03-22):
1870 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1871 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1872 # Other western towns (e.g. Lloydminster) are like Edmonton.
1873 # Matthews and Vincent (1998) write that Denare Beach and Creighton
1874 # are like Winnipeg, in violation of Saskatchewan law.
1875
1876 # From W. Jones (1992-11-06):
1877 # The. . .below is based on information I got from our law library, the
1878 # provincial archives, and the provincial Community Services department.
1879 # A precise history would require digging through newspaper archives, and
1880 # since you didn't say what you wanted, I didn't bother.
1881 #
1882 # Saskatchewan is split by a time zone meridian (105W) and over the years
1883 # the boundary became pretty ragged as communities near it reevaluated
1884 # their affiliations in one direction or the other. In 1965 a provincial
1885 # referendum favoured legislating common time practices.
1886 #
1887 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1888 # Saskatchewan 1978) was proclaimed, and established that the eastern
1911 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1912 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1913 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1914 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1915 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
1916 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1917 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
1918 Rule Regina 1945 only - Sep lastSun 2:00 0 S
1919 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1920 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
1921 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1922 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1923 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
1924 Rule Regina 1959 only - Oct lastSun 2:00 0 S
1925 #
1926 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1927 Rule Swift 1957 only - Oct lastSun 2:00 0 S
1928 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1929 Rule Swift 1959 only - Oct lastSun 2:00 0 S
1930 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1931 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1932 Zone America/Regina -6:58:36 - LMT 1905 Sep
1933 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1934 -6:00 - CST
1935 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1936 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1937 -7:00 Regina M%sT 1950
1938 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1939 -6:00 - CST
1940
1941
1942 # Alberta
1943
1944 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1945 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1946 Rule Edm 1918 only - Oct 27 2:00 0 S
1947 Rule Edm 1919 only - May 27 2:00 0 S
1948 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1949 Rule Edm 1920 only - Oct lastSun 2:00 0 S
1950 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1951 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1952 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
1953 Rule Edm 1945 only - Sep lastSun 2:00 0 S
1954 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1955 Rule Edm 1947 only - Sep lastSun 2:00 0 S
1956 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1957 Rule Edm 1967 only - Oct lastSun 2:00 0 S
1958 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1959 Rule Edm 1969 only - Oct lastSun 2:00 0 S
1960 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1961 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
1962 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1963 Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1964 -7:00 Edm M%sT 1987
1965 -7:00 Canada M%sT
1966
1967
1968 # British Columbia
1969
1970 # From Paul Eggert (2006-03-22):
1971 # Shanks & Pottenger write that since 1970 most of this region has
1972 # been like Vancouver.
1973 # Dawson Creek uses MST. Much of east BC is like Edmonton.
1974 # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1975
1976 # It seems though that (re: Creston) is not entirely correct:
1977
1978 # From Chris Walton (2011-12-01):
1979 # There are two areas within the Canadian province of British Columbia
1980 # that do not currently observe daylight saving:
1981 # a) The Creston Valley (includes the town of Creston and surrounding area)
1982 # b) The eastern half of the Peace River Regional District
2035 # From Tim Parenti (2015-09-23):
2036 # This requires a new zone for the Northern Rockies Regional Municipality,
2037 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a
2038 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has
2039 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
2040 # 2015-03-08.
2041 #
2042 # From Paul Eggert (2015-09-23):
2043 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
2044
2045 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2046 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
2047 Rule Vanc 1918 only - Oct 27 2:00 0 S
2048 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
2049 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
2050 Rule Vanc 1945 only - Sep 30 2:00 0 S
2051 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
2052 Rule Vanc 1946 only - Oct 13 2:00 0 S
2053 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
2054 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
2055 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2056 Zone America/Vancouver -8:12:28 - LMT 1884
2057 -8:00 Vanc P%sT 1987
2058 -8:00 Canada P%sT
2059 Zone America/Dawson_Creek -8:00:56 - LMT 1884
2060 -8:00 Canada P%sT 1947
2061 -8:00 Vanc P%sT 1972 Aug 30 2:00
2062 -7:00 - MST
2063 Zone America/Fort_Nelson -8:10:47 - LMT 1884
2064 -8:00 Vanc P%sT 1946
2065 -8:00 - PST 1947
2066 -8:00 Vanc P%sT 1987
2067 -8:00 Canada P%sT 2015 Mar 8 2:00
2068 -7:00 - MST
2069 Zone America/Creston -7:46:04 - LMT 1884
2070 -7:00 - MST 1916 Oct 1
2071 -8:00 - PST 1918 Jun 2
2072 -7:00 - MST
2073
2074 # Northwest Territories, Nunavut, Yukon
2075
2106 #
2107 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
2108 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
2109 # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
2110 # Yukon Interpretation Ordinance
2111 # Yukon standard time is the local mean time at the one hundred and
2112 # thirty-fifth meridian.
2113 #
2114 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
2115 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
2116 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
2117 # Yukon Interpretation Ordinance, 1955, Chap. 16.
2118 #
2119 # (1) Subject to this section, standard time shall be reckoned as nine
2120 # hours behind Greenwich Time and called Yukon Standard Time.
2121 #
2122 # (2) Notwithstanding subsection (1), the Commissioner may make regulations
2123 # varying the manner of reckoning standard time.
2124 #
2125 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
2126 # http://? - no online source found
2127 #
2128 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
2129 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
2130 # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
2131 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
2132 #
2133 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
2134 # Territory on 27th January, 1966, is hereby revoked.
2135 #
2136 # 2. Yukon (East) Standard Time as defined by section 36 of the
2137 # Interpretation Ordinance from and after mid-night on the 28th day of May,
2138 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that
2139 # is to say, eight hours behind Greenwich Time in the area of the Yukon
2140 # Territory lying east of the 138th degree longitude west.
2141 #
2142 # 3. In the remainder of the Territory, lying west of the 138th degree
2143 # longitude west, Yukon (West) Standard Time shall be reckoned as nine
2144 # hours behind Greenwich Time.
2145 #
2146 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2147 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2148 # C.O. 1973/214 INTERPRETATION ACT ...
2149 #
2150 # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
2151 # revoked.
2152 #
2153 # 2. Yukon Standard Time as defined by section 36 of the Interpretation
2154 # Act from and after midnight on the twenty-eighth day of October, 1973
2155 # shall be reckoned in the same manner as Pacific Standard Time, that is
2156 # to say eight hours behind Greenwich Time.
2157 #
2158 # * O.I.C. 1980/02 INTERPRETATION ACT
2159 # http://? - no online source found
2160 #
2161 # * Yukon Daylight Saving Time, YOIC 1987/56
2162 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2163 # O.I.C. 1987/056 INTERPRETATION ACT ...
2164 #
2165 # In every year between
2166 # (a) two o'clock in the morning in the first Sunday in April, and
2167 # (b) two o'clock in the morning in the last Sunday in October,
2168 # Standard Time shall be reckoned as seven hours behind Greenwich Time and
2169 # called Yukon Daylight Saving Time.
2170 # ...
2171 # Dated ... 9th day of March, A.D., 1987.
2172 #
2173 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
2174 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2175 # O.I.C. 2006/127 INTERPRETATION ACT ...
2176 #
2177 # 1. In Yukon each year the time for general purposes shall be 7 hours
2178 # behind Greenwich mean time during the period commencing at two o'clock
2179 # in the forenoon on the second Sunday of March and ending at two o'clock
2355 # search on the weather through Env. Canada. web site"
2356 #
2357 # If I had realized the Stephanie did not live in Resolute Bay I would
2358 # never have contacted her. I now believe that all the information I
2359 # obtained in November 2008 should be ignored...
2360 # I apologize for reporting incorrect information in 2008.
2361
2362 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2363 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
2364 Rule NT_YK 1918 only - Oct 27 2:00 0 S
2365 Rule NT_YK 1919 only - May 25 2:00 1:00 D
2366 Rule NT_YK 1919 only - Nov 1 0:00 0 S
2367 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
2368 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
2369 Rule NT_YK 1945 only - Sep 30 2:00 0 S
2370 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
2371 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
2372 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
2373 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
2374 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
2375 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2376 # aka Panniqtuuq
2377 Zone America/Pangnirtung 0 - -00 1921 # trading post est.
2378 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
2379 -5:00 Canada E%sT 1999 Oct 31 2:00
2380 -6:00 Canada C%sT 2000 Oct 29 2:00
2381 -5:00 Canada E%sT
2382 # formerly Frobisher Bay
2383 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est.
2384 -5:00 NT_YK E%sT 1999 Oct 31 2:00
2385 -6:00 Canada C%sT 2000 Oct 29 2:00
2386 -5:00 Canada E%sT
2387 # aka Qausuittuq
2388 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded
2389 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2390 -5:00 - EST 2001 Apr 1 3:00
2391 -6:00 Canada C%sT 2006 Oct 29 2:00
2392 -5:00 - EST 2007 Mar 11 3:00
2393 -6:00 Canada C%sT
2394 # aka Kangiqiniq
2395 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded
2502 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2503 # [translated], says "summer time will ... take effect on the first Sunday
2504 # in May, and end on the last Sunday of September.
2505
2506 # From Arthur David Olson (2001-01-25):
2507 # The 2001-01-24 traditional Washington Post contained the page one
2508 # story "Timely Issue Divides Mexicans."...
2509 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2510 # ... Mexico City Mayor López Obrador "...is threatening to keep
2511 # Mexico City and its 20 million residents on a different time than
2512 # the rest of the country..." In particular, López Obrador would abolish
2513 # observation of Daylight Saving Time.
2514
2515 # Official statute published by the Energy Department
2516 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2517 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2518 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03).
2519
2520 # From Paul Eggert (2001-03-03):
2521 #
2522 # http://www.latimes.com/news/nation/20010303/t000018766.html
2523 # James F. Smith writes in today's LA Times
2524 # * Sonora will continue to observe standard time.
2525 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
2526 # the Federal District will not adopt DST.
2527 # * 4 of 16 district leaders announced they'll ignore the decree.
2528 # * The decree does not affect federal-controlled facilities including
2529 # the airport, banks, hospitals, and schools.
2530 #
2531 # For now we'll assume that the Federal District will bow to federal rules.
2532
2533 # From Jesper Nørgaard (2001-04-01):
2534 # I found some references to the Mexican application of daylight
2535 # saving, which modifies what I had already sent you, stating earlier
2536 # that a number of northern Mexican states would go on daylight
2537 # saving. The modification reverts this to only cover Baja California
2538 # (Norte), while all other states (except Sonora, who has no daylight
2539 # saving all year) will follow the original decree of president
2540 # Vicente Fox, starting daylight saving May 6, 2001 and ending
2541 # September 30, 2001.
2542 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
2629 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2630 # of Quintana Roo.
2631 # 5- The islands, reefs and keys shall take their timezone from the
2632 # longitude they are located at.
2633
2634 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2635 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2636 Rule Mexico 1939 only - Jun 25 0:00 0 S
2637 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2638 Rule Mexico 1941 only - Apr 1 0:00 0 S
2639 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2640 Rule Mexico 1944 only - May 1 0:00 0 S
2641 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2642 Rule Mexico 1950 only - Jul 30 0:00 0 S
2643 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2644 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2645 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2646 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2647 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2648 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2649 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2650 # Quintana Roo; represented by Cancún
2651 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2652 -6:00 - CST 1981 Dec 23
2653 -5:00 Mexico E%sT 1998 Aug 2 2:00
2654 -6:00 Mexico C%sT 2015 Feb 1 2:00
2655 -5:00 - EST
2656 # Campeche, Yucatán; represented by Mérida
2657 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2658 -6:00 - CST 1981 Dec 23
2659 -5:00 - EST 1982 Dec 2
2660 -6:00 Mexico C%sT
2661 # Coahuila, Nuevo León, Tamaulipas (near US border)
2662 # This includes the following municipalities:
2663 # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava,
2664 # Guerrero, Hidalgo.
2665 # in Nuevo León: Anáhuac, Los Aldama.
2666 # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
2667 # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
2668 # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal,
2669 # 2016-03-12
2822 # no information
2823
2824 ###############################################################################
2825
2826 # Anguilla
2827 # Antigua and Barbuda
2828 # See America/Port_of_Spain.
2829
2830 # Bahamas
2831 #
2832 # For 1899 Milne gives -5:09:29.5; round that.
2833 #
2834 # From Sue Williams (2006-12-07):
2835 # The Bahamas announced about a month ago that they plan to change their DST
2836 # rules to sync with the U.S. starting in 2007....
2837 # http://www.jonesbahamas.com/?c=45&a=10412
2838
2839 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2840 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2841 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
2842 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2843 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2
2844 -5:00 Bahamas E%sT 1976
2845 -5:00 US E%sT
2846
2847 # Barbados
2848
2849 # For 1899 Milne gives -3:58:29.2; round that.
2850
2851 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2852 Rule Barb 1977 only - Jun 12 2:00 1:00 D
2853 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2854 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2855 Rule Barb 1979 only - Sep 30 2:00 0 S
2856 Rule Barb 1980 only - Sep 25 2:00 0 S
2857 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2858 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown
2859 -3:58:29 - BMT 1932 # Bridgetown Mean Time
2860 -4:00 Barb A%sT
2861
2862 # Belize
2863 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2864 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2865 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530
2866 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST
2867 Rule Belize 1973 only - Dec 5 0:00 1:00 CDT
2868 Rule Belize 1974 only - Feb 9 0:00 0 CST
2869 Rule Belize 1982 only - Dec 18 0:00 1:00 CDT
2870 Rule Belize 1983 only - Feb 12 0:00 0 CST
2871 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2872 Zone America/Belize -5:52:48 - LMT 1912 Apr
2873 -6:00 Belize %s
2874
2875 # Bermuda
2876
2877 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2878 # Bermuda dockyard, Ireland I; round that.
2879
2880 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2881
2882 # Next year, however, clocks in the US will go forward on the second Sunday
2883 # in March, until the first Sunday in November. And, after the Time Zone
2884 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2885 # Friday, the same thing will happen in Bermuda.
2886 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2887
2888 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2889 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton
2890 -4:00 - AST 1974 Apr 28 2:00
2891 -4:00 Canada A%sT 1976
2892 -4:00 US A%sT
2893
2894 # Cayman Is
2895 # See America/Panama.
2896
2897 # Costa Rica
2898
2899 # Milne gives -5:36:13.3 as San José mean time; round to nearest.
2900
2901 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2902 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2903 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2904 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2905 # IATA SSIM (1991-09) says the following was at 1:00;
2906 # go with Shanks & Pottenger.
2907 Rule CR 1991 only - Jul 1 0:00 0 S
2908 Rule CR 1992 only - Mar 15 0:00 0 S
2909 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2910 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2911 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José
2912 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time
2913 -6:00 CR C%sT
2914 # Coco
2915 # no information; probably like America/Costa_Rica
2916
2917 # Cuba
2918
2919 # From Paul Eggert (2013-02-21):
2920 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2921 # for the port, and -5:30 for meteorological observations.
2922 # For now, stick with Shanks & Pottenger.
2923
2924 # From Arthur David Olson (1999-03-29):
2925 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2926 # the Cuban National Team and the Baltimore Orioles was carried live on
2927 # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2928 # During the game, play-by-play announcer Jim Hunter noted that
2929 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2930 # Time today." (The "two hour" remark referred to losing one hour of
3096 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
3097 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
3098 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
3099 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
3100 Rule Cuba 1996 only - Oct 6 0:00s 0 S
3101 Rule Cuba 1997 only - Oct 12 0:00s 0 S
3102 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
3103 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
3104 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D
3105 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D
3106 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S
3107 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
3108 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
3109 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D
3110 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D
3111 Rule Cuba 2011 only - Nov 13 0:00s 0 S
3112 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D
3113 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S
3114 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D
3115
3116 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3117 Zone America/Havana -5:29:28 - LMT 1890
3118 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
3119 -5:00 Cuba C%sT
3120
3121 # Dominica
3122 # See America/Port_of_Spain.
3123
3124 # Dominican Republic
3125
3126 # From Steffen Thorsen (2000-10-30):
3127 # Enrique Morales reported to me that the Dominican Republic has changed the
3128 # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
3129 # http://www.listin.com.do/antes/261000/republica/princi.html
3130
3131 # From Paul Eggert (2000-12-04):
3132 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
3133
3134 # From Rives McDow (2000-12-01):
3135 # Dominican Republic changed its mind and presidential decree on Tuesday,
3136 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
3137 # Dominican Republic will be reverting to 8 hours from the International Date
3138 # Line, and will not be using DST in the foreseeable future. The reason they
3139 # decided to use DST was to be in synch with Puerto Rico, who was also going
3140 # to implement DST. When Puerto Rico didn't implement DST, the president
3141 # decided to revert.
3142
3143
3144 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3145 Rule DR 1966 only - Oct 30 0:00 1:00 EDT
3146 Rule DR 1967 only - Feb 28 0:00 0 EST
3147 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430
3148 Rule DR 1970 only - Feb 21 0:00 0 EST
3149 Rule DR 1971 only - Jan 20 0:00 0 EST
3150 Rule DR 1972 1974 - Jan 21 0:00 0 EST
3151 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3152 Zone America/Santo_Domingo -4:39:36 - LMT 1890
3153 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
3154 -5:00 DR %s 1974 Oct 27
3155 -4:00 - AST 2000 Oct 29 2:00
3156 -5:00 US E%sT 2000 Dec 3 1:00
3157 -4:00 - AST
3158
3159 # El Salvador
3160
3161 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3162 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
3163 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
3164 # There are too many San Salvadors elsewhere, so use America/El_Salvador
3165 # instead of America/San_Salvador.
3166 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3167 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
3168 -6:00 Salv C%sT
3169
3170 # Grenada
3171 # Guadeloupe
3172 # St Barthélemy
3173 # St Martin (French part)
3174 # See America/Port_of_Spain.
3175
3176 # Guatemala
3177 #
3178 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3179 # Diario Co Latino, at
3180 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
3181 # says in an article dated 2006-04-19 that the Guatemalan government had
3182 # decided on that date to advance official time by 60 minutes, to lessen the
3183 # impact of the elevated cost of oil.... Daylight saving time will last from
3184 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3185 # From Paul Eggert (2006-06-22):
3186 # The Ministry of Energy and Mines, press release CP-15/2006
3187 # (2006-04-19), says DST ends at 24:00. See
3188 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
3189
3190 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3191 Rule Guat 1973 only - Nov 25 0:00 1:00 D
3192 Rule Guat 1974 only - Feb 24 0:00 0 S
3193 Rule Guat 1983 only - May 21 0:00 1:00 D
3194 Rule Guat 1983 only - Sep 22 0:00 0 S
3195 Rule Guat 1991 only - Mar 23 0:00 1:00 D
3196 Rule Guat 1991 only - Sep 7 0:00 0 S
3197 Rule Guat 2006 only - Apr 30 0:00 1:00 D
3198 Rule Guat 2006 only - Oct 1 0:00 0 S
3199 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3200 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
3201 -6:00 Guat C%sT
3202
3203 # Haiti
3204 # From Gwillim Law (2005-04-15):
3205 # Risto O. Nykänen wrote me that Haiti is now on DST.
3206 # I searched for confirmation, and I found a press release
3207 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3208 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says:
3209 #
3210 # "The Prime Minister's Communication Office notifies the public in general
3211 # and the press in particular that, following a decision of the Interior
3212 # Ministry and the Territorial Collectivities [I suppose that means the
3213 # provinces], Haiti will move to Eastern Daylight Time in the night from next
3214 # Saturday the 2nd to Sunday the 3rd.
3215 #
3216 # "Consequently, the Prime Minister's Communication Office wishes to inform
3217 # the population that the country's clocks will be set forward one hour
3218 # starting at midnight. This provision will hold until the last Saturday in
3219 # October 2005.
3265 # From Steffen Thorsen (2017-03-12):
3266 # We have received 4 mails from different people telling that Haiti
3267 # has started DST again today, and this source seems to confirm that,
3268 # I have not been able to find a more authoritative source:
3269 # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3270
3271 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3272 Rule Haiti 1983 only - May 8 0:00 1:00 D
3273 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
3274 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
3275 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3276 # Go with IATA.
3277 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
3278 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
3279 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
3280 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
3281 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D
3282 Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S
3283 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D
3284 Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S
3285 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3286 Zone America/Port-au-Prince -4:49:20 - LMT 1890
3287 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
3288 -5:00 Haiti E%sT
3289
3290 # Honduras
3291 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3292
3293 # From Paul Eggert (2006-05-05):
3294 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3295 # saying Honduras will start using DST midnight Saturday, effective 4
3296 # months until September. La Tribuna reported today
3297 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3298 # of Honduras, refused to back down on this.
3299
3300 # From Jesper Nørgaard Welen (2006-08-08):
3301 # It seems that Honduras has returned from DST to standard time this Monday at
3302 # 00:00 hours (prolonging Sunday to 25 hours duration).
3303 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3304
3305 # From Paul Eggert (2006-08-08):
3306 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3307 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3308 # It mentions executive decree 18-2006.
3309
3310 # From Steffen Thorsen (2006-08-17):
3311 # Honduras will observe DST from 2007 to 2009, exact dates are not
3312 # published, I have located this authoritative source:
3313 # http://www.presidencia.gob.hn/noticia.aspx?nId=47
3314
3315 # From Steffen Thorsen (2007-03-30):
3316 # http://www.laprensahn.com/pais_nota.php?id04962=7386
3317 # So it seems that Honduras will not enter DST this year....
3318
3319 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3320 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
3321 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
3322 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
3323 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3324 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3325 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3326 -6:00 Hond C%sT
3327 #
3328 # Great Swan I ceded by US to Honduras in 1972
3329
3330 # Jamaica
3331 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3332 # unspecified official document, and says "This time is used throughout the
3333 # island". Go with Milne. Round to the nearest second as required by zic.
3334 #
3335 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3336 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3337 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that
3338 # Manley's supporters associated this act with Manley's nickname "Joshua"
3339 # (recall that in the Bible the sun stood still at Joshua's request),
3340 # and with the Rod of Correction which Manley said he had received from
3341 # Haile Selassie, Emperor of Ethiopia. See:
3342 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3343 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3344 #
3345 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3346 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston
3347 -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3348 -5:00 - EST 1974
3349 -5:00 US E%sT 1984
3350 -5:00 - EST
3351
3352 # Martinique
3353 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3354 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3355 -4:04:20 - FFMT 1911 May # Fort-de-France MT
3356 -4:00 - AST 1980 Apr 6
3357 -4:00 1:00 ADT 1980 Sep 28
3358 -4:00 - AST
3359
3360 # Montserrat
3361 # See America/Port_of_Spain.
3362
3363 # Nicaragua
3364 #
3365 # This uses Shanks & Pottenger for times before 2005.
3366 #
3367 # From Steffen Thorsen (2005-04-12):
3368 # I've got reports from 8 different people that Nicaragua just started
3369 # DST on Sunday 2005-04-10, in order to save energy because of
3370 # expensive petroleum. The exact end date for DST is not yet
3371 # announced, only "September" but some sites also say "mid-September".
3372 # Some background information is available on the President's official site:
3373 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3397 # From Jesper Nørgaard Welen (2006-05-05):
3398 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3399 # (my informal translation)
3400 # By order of the president of the republic, Enrique Bolaños, Nicaragua
3401 # advanced by sixty minutes their official time, yesterday at 2 in the
3402 # morning, and will stay that way until 30th of September.
3403 #
3404 # From Jesper Nørgaard Welen (2006-09-30):
3405 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3406 # My informal translation runs:
3407 # The natural sun time is restored in all the national territory, in that the
3408 # time is returned one hour at 01:00 am of October 1 of 2006.
3409 #
3410 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3411 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
3412 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
3413 Rule Nic 2005 only - Apr 10 0:00 1:00 D
3414 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
3415 Rule Nic 2006 only - Apr 30 2:00 1:00 D
3416 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
3417 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3418 Zone America/Managua -5:45:08 - LMT 1890
3419 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
3420 -6:00 - CST 1973 May
3421 -5:00 - EST 1975 Feb 16
3422 -6:00 Nic C%sT 1992 Jan 1 4:00
3423 -5:00 - EST 1992 Sep 24
3424 -6:00 - CST 1993
3425 -5:00 - EST 1997
3426 -6:00 Nic C%sT
3427
3428 # Panama
3429 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3430 Zone America/Panama -5:18:08 - LMT 1890
3431 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time
3432 -5:00 - EST
3433 Link America/Panama America/Cayman
3434
3435 # Puerto Rico
3436 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3437 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3438 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
3439 -4:00 - AST 1942 May 3
3440 -4:00 US A%sT 1946
3441 -4:00 - AST
3442
3443 # St Kitts-Nevis
3444 # St Lucia
3445 # See America/Port_of_Spain.
3446
3447 # St Pierre and Miquelon
3448 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3449 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3450 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
3451 -4:00 - AST 1980 May
3452 -3:00 - -03 1987
3453 -3:00 Canada -03/-02
3454
3455 # St Vincent and the Grenadines
3456 # See America/Port_of_Spain.
3457
3458 # Turks and Caicos
3459 #
3460 # From Chris Dunn in
3461 # https://bugs.debian.org/415007
3462 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3463 # daylight saving dates for time changes have been adjusted to match
3464 # the recent U.S. change of dates.
3465 #
3466 # From Brian Inglis (2007-04-28):
3467 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3468 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3469 # rows before that there is an out of date entry for Oct:
3475 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:
3476 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3477 # Model this as a switch from EST/EDT to AST ...
3478 # From Chris Walton (2014-11-04):
3479 # ... the TCI government appears to have delayed the switch to
3480 # "permanent daylight saving time" by one year....
3481 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3482 #
3483 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
3484 # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
3485 # during the summer months and Standard Time, also known as Local
3486 # Time, during the winter months with effect from April 2018 ...
3487 # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
3488 #
3489 # From Paul Eggert (2017-08-26):
3490 # The date of effect of the spring 2018 change appears to be March 11,
3491 # which makes more sense. See: Hamilton D. Time change back
3492 # by March 2018 for TCI. Magnetic Media. 2017-08-25.
3493 # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
3494 #
3495 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3496 Zone America/Grand_Turk -4:44:32 - LMT 1890
3497 -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3498 -5:00 - EST 1979
3499 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3500 -4:00 - AST 2018 Mar 11 3:00
3501 -5:00 US E%sT
3502
3503 # British Virgin Is
3504 # Virgin Is
3505 # See America/Port_of_Spain.
3506
3507
3508 # Local Variables:
3509 # coding: utf-8
3510 # End:
|
99 # valuable if I stay in bed after the sun has risen. As an admirer
100 # of moonlight I resent the bossy insistence of those who want to
101 # reduce my time for enjoying it. At the back of the Daylight Saving
102 # scheme I detect the bony, blue-fingered hand of Puritanism, eager
103 # to push people into bed earlier, and get them up earlier, to make
104 # them healthy, wealthy and wise in spite of themselves.
105 #
106 # -- Robertson Davies, The diary of Samuel Marchbanks,
107 # Clarke, Irwin (1947), XIX, Sunday
108 #
109 # For more about the first ten years of DST in the United States, see
110 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
111 # (Carnegie Library of Pittsburgh, 1927).
112 # http://www.clpgh.org/exhibit/dst.html
113 #
114 # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
115 # However, DST was imposed by the Standard Time Act of 1918, which
116 # was the first nationwide legal time standard, and apparently
117 # time was just called "Standard Time" or "Daylight Saving Time".
118
119 # From Paul Eggert (2019-06-04):
120 # Here is the legal basis for the US federal rules.
121 # * Public Law 65-106 (1918-03-19) implemented standard and daylight saving
122 # time for the first time across the US, springing forward on March's last
123 # Sunday and falling back on October's last Sunday.
124 # https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf
125 # * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday.
126 # https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf
127 # * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09.
128 # https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf
129 # * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30.
130 # https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf
131 # * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST,
132 # from April's last Sunday to October's last Sunday, effective 1967.
133 # https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf
134 # * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06.
135 # https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf
136 # * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to
137 # February's last Sunday.
138 # https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf
139 # * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first
140 # Sunday.
141 # https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf
142 # * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward
143 # to March's second Sunday and the fall-back to November's first Sunday.
144 # https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf
145 # All transitions are at 02:00 local time.
146
147 # From Arthur David Olson:
148 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
149 # Daylight Saving Time in the US was by local option, except during wartime.
150
151 # From Arthur David Olson (2000-09-25):
152 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
153 # In the introduction, Oboler spoke of "Eastern Peace Time."
154 # An AltaVista search turned up:
155 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html
156 # "When the time is announced over the radio now, it is 'Eastern Peace
157 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
158 # (August 1945) by way of confirmation.
159 #
160 # From Paul Eggert (2017-09-23):
161 # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
162
163 # From Joseph Gallant citing
164 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
165 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
181 # importance."
182 #
183 # On Aug. 14, stalling while talking steadily into the NBC networks' open
184 # microphone, St. John heard five bells and waited only to hear a sixth bell,
185 # before announcing confidently: "Ladies and gentlemen, World War II is over.
186 # The Japanese have agreed to our surrender terms."
187 #
188 # He had scored a 20-second scoop on other broadcasters.
189
190 # From Arthur David Olson (2005-08-22):
191 # Paul has been careful to use the "US" rules only in those locations
192 # that are part of the United States; this reflects the real scope of
193 # U.S. government action. So even though the "US" rules have changed
194 # in the latest release, other countries won't be affected.
195
196 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
197 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
198 Rule US 1918 1919 - Oct lastSun 2:00 0 S
199 Rule US 1942 only - Feb 9 2:00 1:00 W # War
200 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
201 Rule US 1945 only - Sep 30 2:00 0 S
202 Rule US 1967 2006 - Oct lastSun 2:00 0 S
203 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
204 Rule US 1974 only - Jan 6 2:00 1:00 D
205 Rule US 1975 only - Feb lastSun 2:00 1:00 D
206 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
207 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
208 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
209 Rule US 2007 max - Nov Sun>=1 2:00 0 S
210
211 # From Arthur David Olson, 2005-12-19
212 # We generate the files specified below to guard against old files with
213 # obsolete information being left in the time zone binary directory.
214 # We limit the list to names that have appeared in previous versions of
215 # this time zone package.
216 # We do these as separate Zones rather than as Links to avoid problems if
217 # a particular place changes whether it observes DST.
218 # We put these specifications here in the northamerica file both to
219 # increase the chances that they'll actually get compiled and to
220 # avoid the need to duplicate the US rules in another file.
221
222 # Zone NAME STDOFF RULES FORMAT [UNTIL]
223 Zone EST -5:00 - EST
224 Zone MST -7:00 - MST
225 Zone HST -10:00 - HST
226 Zone EST5EDT -5:00 US E%sT
227 Zone CST6CDT -6:00 US C%sT
228 Zone MST7MDT -7:00 US M%sT
229 Zone PST8PDT -8:00 US P%sT
230
231 # From U. S. Naval Observatory (1989-01-19):
232 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
233 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
234 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
235 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
236 # USA MOUNTAIN 7 H BEHIND UTC DENVER
237 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
238 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
239 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
240 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
241 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
242 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
359 # Four cities are involved. The two not mentioned above are Smiths Station
360 # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started
361 # because West Point Pepperell textile mills were in Alabama while the
362 # corporate office was in Georgia, and residents voted to keep Eastern
363 # time even after the mills closed. See: Kazek K. Did you know which
364 # Alabama towns are in a different time zone? al.com 2017-02-06.
365 # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html
366
367 # From Paul Eggert (2014-09-06):
368 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
369 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
370 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the
371 # nearest second.
372
373 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
374 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
375 Rule NYC 1920 only - Oct lastSun 2:00 0 S
376 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
377 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
378 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
379 # Zone NAME STDOFF RULES FORMAT [UNTIL]
380 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
381 -5:00 US E%sT 1920
382 -5:00 NYC E%sT 1942
383 -5:00 US E%sT 1946
384 -5:00 NYC E%sT 1967
385 -5:00 US E%sT
386
387 # US central time, represented by Chicago
388
389 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
390 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
391 # Washington counties), Illinois, western Indiana
392 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
393 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
394 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
395 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
396 # western Tennessee, most of Texas, Wisconsin
397
398 # From Paul Eggert (2018-01-07):
399 # In 1869 the Chicago Astronomical Society contracted with the city to keep
419 # Statue 175 closer in synch with the US Congress' intent....
420 # https://docs.legis.wisconsin.gov/2007/related/acts/3
421
422 # From an email administrator of the City of Fort Pierre, SD (2015-12-21):
423 # Fort Pierre is technically located in the Mountain time zone as is
424 # the rest of Stanley County. Most of Stanley County and Fort Pierre
425 # uses the Central time zone due to doing most of their business in
426 # Pierre so it simplifies schedules. I have lived in Stanley County
427 # all my life and it has been that way since I can remember. (43 years!)
428 #
429 # From Paul Eggert (2015-12-25):
430 # Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
431
432 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
433 Rule Chicago 1920 only - Jun 13 2:00 1:00 D
434 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
435 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
436 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
437 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
438 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
439 # Zone NAME STDOFF RULES FORMAT [UNTIL]
440 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
441 -6:00 US C%sT 1920
442 -6:00 Chicago C%sT 1936 Mar 1 2:00
443 -5:00 - EST 1936 Nov 15 2:00
444 -6:00 Chicago C%sT 1942
445 -6:00 US C%sT 1946
446 -6:00 Chicago C%sT 1967
447 -6:00 US C%sT
448 # Oliver County, ND switched from mountain to central time on 1992-10-25.
449 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
450 -7:00 US M%sT 1992 Oct 25 2:00
451 -6:00 US C%sT
452 # Morton County, ND, switched from mountain to central time on
453 # 2003-10-26, except for the area around Mandan which was already central time.
454 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
455 # Officially this switch also included part of Sioux County, and
456 # Jones, Mellette, and Todd Counties in South Dakota;
457 # but in practice these other counties were already observing central time.
458 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
459 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
487 #
488 # From Paul Eggert (2018-10-25):
489 # On 1921-03-04 federal law placed all of Texas into the central time zone.
490 # However, El Paso ignored the law for decades and continued to observe
491 # mountain time, on the grounds that that's what they had always done
492 # and they weren't about to let the federal government tell them what to do.
493 # Eventually the federal government gave in and changed the law on
494 # 1970-04-10 to match what El Paso was actually doing. Although
495 # that's slightly after our 1970 cutoff, there is no need to create a
496 # separate zone for El Paso since they were ignoring the law anyway. See:
497 # Long T. El Pasoans were time rebels, fought to stay in Mountain zone.
498 # El Paso Times. 2018-10-24 06:40 -06.
499 # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/
500 #
501 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
502 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
503 Rule Denver 1920 only - Oct lastSun 2:00 0 S
504 Rule Denver 1921 only - May 22 2:00 0 S
505 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
506 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
507 # Zone NAME STDOFF RULES FORMAT [UNTIL]
508 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
509 -7:00 US M%sT 1920
510 -7:00 Denver M%sT 1942
511 -7:00 US M%sT 1946
512 -7:00 Denver M%sT 1967
513 -7:00 US M%sT
514
515 # US Pacific time, represented by Los Angeles
516 #
517 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
518 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
519 # north of the Salmon River, and the towns of Burgdorf and Warren),
520 # Nevada (except West Wendover), Oregon (except the northern ¾ of
521 # Malheur county), and Washington
522
523 # From Paul Eggert (2016-08-20):
524 # In early February 1948, in response to California's electricity shortage,
525 # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
526 # causing electric clocks to lose six minutes per day. (This did not change
527 # legal time, and is not part of the data here.) See:
540 # to speculate that the objections to Daylight Saving Time were one important
541 # factor in the defeat of the Dewey-Warren Presidential ticket in California.
542 # -- Ross, p 25
543 #
544 # On December 8 the governor exercised the option, setting the date to January 1
545 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01).
546 #
547 # Despite the controversy, in 1949 California voters approved Proposition 12,
548 # which established DST from April's last Sunday at 01:00 until September's
549 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
550 # the fall-back date to October's last Sunday. See:
551 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
552 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
553 #
554 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
555 Rule CA 1948 only - Mar 14 2:01 1:00 D
556 Rule CA 1949 only - Jan 1 2:00 0 S
557 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
558 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
559 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
560 # Zone NAME STDOFF RULES FORMAT [UNTIL]
561 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
562 -8:00 US P%sT 1946
563 -8:00 CA P%sT 1967
564 -8:00 US P%sT
565
566 # Alaska
567 # AK%sT is the modern abbreviation for -09 per USNO.
568 #
569 # From Paul Eggert (2017-06-15):
570 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
571 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
572 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
573 # Russian forts and fleet at Sitka fired salutes to mark the ceremony of
574 # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2.
575 # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
576 # Sitka workers did not change their calendars until Sunday, 1867-10-20,
577 # and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P).
578 # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
579 # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
580 # Include only the time zone part of this transition, ignoring the switch
648 # From Ryan Stanley (2018-11-06):
649 # The Metlakatla community in Alaska has decided not to change its
650 # clock back an hour starting on November 4th, 2018 (day before yesterday).
651 # They will be gmtoff=-28800 year-round.
652 # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/
653
654 # From Paul Eggert (2018-12-16):
655 # In a 2018-12-11 special election, Metlakatla voted to go back to
656 # Alaska time (including daylight saving time) starting next year.
657 # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
658 #
659 # From Ryan Stanley (2019-01-11):
660 # The community will be changing back on the 20th of this month...
661 # From Tim Parenti (2019-01-11):
662 # Per an announcement on the Metlakatla community's official Facebook page, the
663 # "fall back" will be on Sunday 2019-01-20 at 02:00:
664 # https://www.facebook.com/141055983004923/photos/607150969728753/
665 # So they won't be waiting for Alaska to join them on 2019-03-10, but will
666 # rather change their clocks twice in seven weeks.
667
668 # Zone NAME STDOFF RULES FORMAT [UNTIL]
669 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32
670 -8:57:41 - LMT 1900 Aug 20 12:00
671 -8:00 - PST 1942
672 -8:00 US P%sT 1946
673 -8:00 - PST 1969
674 -8:00 US P%sT 1980 Apr 27 2:00
675 -9:00 US Y%sT 1980 Oct 26 2:00
676 -8:00 US P%sT 1983 Oct 30 2:00
677 -9:00 US Y%sT 1983 Nov 30
678 -9:00 US AK%sT
679 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30
680 -9:01:13 - LMT 1900 Aug 20 12:00
681 -8:00 - PST 1942
682 -8:00 US P%sT 1946
683 -8:00 - PST 1969
684 -8:00 US P%sT 1983 Oct 30 2:00
685 -9:00 US Y%sT 1983 Nov 30
686 -9:00 US AK%sT
687 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55
688 -8:46:18 - LMT 1900 Aug 20 12:00
768 # and Act 163 (approved 21 May 1933)."
769
770 # From Arthur David Olson (2011-01-19):
771 # The following is from "Laws of the Territory of Hawaii Passed by the
772 # Seventeenth Legislature: Regular Session 1933," available (as of
773 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act
774 # 90...At 2 o'clock ante meridian of the last Sunday in April of each
775 # year, the standard time of this Territory shall be advanced one
776 # hour...This Act shall take effect upon its approval. Approved this 26th
777 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
778 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
779 # hereby repealed...This Act shall take effect upon its approval, upon
780 # which date the standard time of this Territory shall be restored to
781 # that existing immediately prior to the taking effect of said Act 90.
782 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
783 # of the Territory of Hawaii."
784 #
785 # Note that 1933-05-21 was a Sunday.
786 # We're left to guess the time of day when Act 163 was approved; guess noon.
787
788 # Zone NAME STDOFF RULES FORMAT [UNTIL]
789 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00
790 -10:30 - HST 1933 Apr 30 2:00
791 -10:30 1:00 HDT 1933 May 21 12:00
792 -10:30 US H%sT 1947 Jun 8 2:00
793 -10:00 - HST
794
795 # Now we turn to US areas that have diverged from the consensus since 1970.
796
797 # Arizona mostly uses MST.
798
799 # From Paul Eggert (2002-10-20):
800 #
801 # The information in the rest of this paragraph is derived from the
802 # Daylight Saving Time web page
803 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
804 # maintained by the Arizona State Library, Archives and Public Records.
805 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
806 # time, but by federal law railroads, airlines, bus lines, military
807 # personnel, and some engaged in interstate commerce continued to
808 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
809 # Gazette says that was the date the law changed, and that 04-01 was
810 # the date the state's clocks would change. In 1945 the State of
811 # Arizona used standard time all year, again with exceptions only as
812 # mandated by federal law. Arizona observed DST in 1967, but Arizona
813 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
814 #
815 # Shanks says the 1944 experiment came to an end on 1944-03-17.
816 # Go with the Arizona State Library instead.
817
818 # Zone NAME STDOFF RULES FORMAT [UNTIL]
819 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42
820 -7:00 US M%sT 1944 Jan 1 0:01
821 -7:00 - MST 1944 Apr 1 0:01
822 -7:00 US M%sT 1944 Oct 1 0:01
823 -7:00 - MST 1967
824 -7:00 US M%sT 1968 Mar 21
825 -7:00 - MST
826 # From Arthur David Olson (1988-02-13):
827 # A writer from the Inter Tribal Council of Arizona, Inc.,
828 # notes in private correspondence dated 1987-12-28 that "Presently, only the
829 # Navajo Nation participates in the Daylight Saving Time policy, due to its
830 # large size and location in three states." (The "only" means that other
831 # tribal nations don't use DST.)
832 #
833 # From Paul Eggert (2013-08-26):
834 # See America/Denver for a zone appropriate for the Navajo Nation.
835
836 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
837 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
838 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
839 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
840 # Teton, Twin Falls, Valley, Washington counties, and the southern
841 # quarter of Idaho county) and eastern Oregon (most of Malheur County)
842 # switched four weeks late in 1974.
843 #
844 # Zone NAME STDOFF RULES FORMAT [UNTIL]
845 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
846 -8:00 US P%sT 1923 May 13 2:00
847 -7:00 US M%sT 1974
848 -7:00 - MST 1974 Feb 3 2:00
849 -7:00 US M%sT
850
851 # Indiana
852 #
853 # For a map of Indiana's time zone regions, see:
854 # https://en.wikipedia.org/wiki/Time_in_Indiana
855 #
856 # From Paul Eggert (2018-11-30):
857 # A brief but entertaining history of time in Indiana describes a 1949 debate
858 # in the Indiana House where city legislators (who favored "fast time")
859 # tussled with farm legislators (who didn't) over a bill to outlaw DST:
860 # "Lacking enough votes, the city faction tries to filibuster until time runs
861 # out on the session at midnight, but rural champion Rep. Herbert Copeland,
862 # R-Madison, leans over the gallery railing and forces the official clock
863 # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the
864 # debate rages on into the night. The filibuster finally dies out and the
896 # From Paul Eggert (2014-06-26):
897 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
898 # says "DOT is relocating the time zone boundary in Indiana to move Starke,
899 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
900 # Eastern Time Zone to the Central Time Zone.... The effective date of
901 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
902 # changeover date from standard time to Daylight Saving Time."
903 # Strictly speaking, this meant the affected counties changed their
904 # clocks twice that night, but this obviously was in error. The intent
905 # was that 01:59:59 EST be followed by 02:00:00 CDT.
906
907 # From Gwillim Law (2007-02-10):
908 # The Associated Press has been reporting that Pulaski County, Indiana is
909 # going to switch from Central to Eastern Time on March 11, 2007....
910 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
911
912 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
913 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
914 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
915 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
916 # Zone NAME STDOFF RULES FORMAT [UNTIL]
917 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
918 -6:00 US C%sT 1920
919 -6:00 Indianapolis C%sT 1942
920 -6:00 US C%sT 1946
921 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
922 -5:00 - EST 1957 Sep 29 2:00
923 -6:00 - CST 1958 Apr 27 2:00
924 -5:00 - EST 1969
925 -5:00 US E%sT 1971
926 -5:00 - EST 2006
927 -5:00 US E%sT
928 #
929 # Eastern Crawford County, Indiana, left its clocks alone in 1974,
930 # as well as from 1976 through 2005.
931 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
932 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
933 Rule Marengo 1951 only - Sep lastSun 2:00 0 S
934 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
935 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
936 # Zone NAME STDOFF RULES FORMAT [UNTIL]
937 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
938 -6:00 US C%sT 1951
939 -6:00 Marengo C%sT 1961 Apr 30 2:00
940 -5:00 - EST 1969
941 -5:00 US E%sT 1974 Jan 6 2:00
942 -6:00 1:00 CDT 1974 Oct 27 2:00
943 -5:00 US E%sT 1976
944 -5:00 - EST 2006
945 -5:00 US E%sT
946 #
947 # Daviess, Dubois, Knox, and Martin Counties, Indiana,
948 # switched from eastern to central time in April 2006, then switched back
949 # in November 2007.
950 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
951 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
952 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
953 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
954 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
955 Rule Vincennes 1955 only - May 1 0:00 1:00 D
956 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
957 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
958 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
959 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
960 # Zone NAME STDOFF RULES FORMAT [UNTIL]
961 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
962 -6:00 US C%sT 1946
963 -6:00 Vincennes C%sT 1964 Apr 26 2:00
964 -5:00 - EST 1969
965 -5:00 US E%sT 1971
966 -5:00 - EST 2006 Apr 2 2:00
967 -6:00 US C%sT 2007 Nov 4 2:00
968 -5:00 US E%sT
969 #
970 # Perry County, Indiana, switched from eastern to central time in April 2006.
971 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
972 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D
973 Rule Perry 1946 only - Sep lastSun 2:00 0 S
974 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D
975 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S
976 Rule Perry 1955 only - May 1 0:00 1:00 D
977 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
978 Rule Perry 1960 only - Oct lastSun 2:00 0 S
979 Rule Perry 1961 only - Sep lastSun 2:00 0 S
980 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S
981 # Zone NAME STDOFF RULES FORMAT [UNTIL]
982 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57
983 -6:00 US C%sT 1946
984 -6:00 Perry C%sT 1964 Apr 26 2:00
985 -5:00 - EST 1969
986 -5:00 US E%sT 1971
987 -5:00 - EST 2006 Apr 2 2:00
988 -6:00 US C%sT
989 #
990 # Pike County, Indiana moved from central to eastern time in 1977,
991 # then switched back in 2006, then switched back again in 2007.
992 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
993 Rule Pike 1955 only - May 1 0:00 1:00 D
994 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
995 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
996 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
997 # Zone NAME STDOFF RULES FORMAT [UNTIL]
998 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
999 -6:00 US C%sT 1955
1000 -6:00 Pike C%sT 1965 Apr 25 2:00
1001 -5:00 - EST 1966 Oct 30 2:00
1002 -6:00 US C%sT 1977 Oct 30 2:00
1003 -5:00 - EST 2006 Apr 2 2:00
1004 -6:00 US C%sT 2007 Nov 4 2:00
1005 -5:00 US E%sT
1006 #
1007 # Starke County, Indiana moved from central to eastern time in 1991,
1008 # then switched back in 2006.
1009 # From Arthur David Olson (1991-10-28):
1010 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
1011 # notes that Starke County switched from Central time to Eastern time as of
1012 # 1991-10-27.
1013 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1014 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
1015 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
1016 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
1017 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
1018 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
1019 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1020 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
1021 -6:00 US C%sT 1947
1022 -6:00 Starke C%sT 1962 Apr 29 2:00
1023 -5:00 - EST 1963 Oct 27 2:00
1024 -6:00 US C%sT 1991 Oct 27 2:00
1025 -5:00 - EST 2006 Apr 2 2:00
1026 -6:00 US C%sT
1027 #
1028 # Pulaski County, Indiana, switched from eastern to central time in
1029 # April 2006 and then switched back in March 2007.
1030 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1031 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
1032 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
1033 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
1034 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
1035 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1036 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35
1037 -6:00 US C%sT 1946
1038 -6:00 Pulaski C%sT 1961 Apr 30 2:00
1039 -5:00 - EST 1969
1040 -5:00 US E%sT 1971
1041 -5:00 - EST 2006 Apr 2 2:00
1042 -6:00 US C%sT 2007 Mar 11 2:00
1043 -5:00 US E%sT
1044 #
1045 # Switzerland County, Indiana, did not observe DST from 1973 through 2005.
1046 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1047 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
1048 -6:00 US C%sT 1954 Apr 25 2:00
1049 -5:00 - EST 1969
1050 -5:00 US E%sT 1973
1051 -5:00 - EST 2006
1052 -5:00 US E%sT
1053
1054 # From Paul Eggert (2018-03-20):
1055 # The Louisville & Nashville Railroad's 1883-11-18 change occurred at
1056 # 10:00 old local time; train were supposed to come to a standstill
1057 # for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not
1058 # clear how this matched civil time in Louisville, so for now continue
1059 # to assume Louisville switched at noon new local time, like New York.
1060 #
1061 # Part of Kentucky left its clocks alone in 1974.
1062 # This also includes Clark, Floyd, and Harrison counties in Indiana.
1063 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1064 Rule Louisville 1921 only - May 1 2:00 1:00 D
1065 Rule Louisville 1921 only - Sep 1 2:00 0 S
1066 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
1067 Rule Louisville 1941 only - Sep lastSun 2:00 0 S
1068 Rule Louisville 1946 only - Jun 2 2:00 0 S
1069 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
1070 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
1071 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1072 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
1073 -6:00 US C%sT 1921
1074 -6:00 Louisville C%sT 1942
1075 -6:00 US C%sT 1946
1076 -6:00 Louisville C%sT 1961 Jul 23 2:00
1077 -5:00 - EST 1968
1078 -5:00 US E%sT 1974 Jan 6 2:00
1079 -6:00 1:00 CDT 1974 Oct 27 2:00
1080 -5:00 US E%sT
1081 #
1082 # Wayne County, Kentucky
1083 #
1084 # From Lake Cumberland LIFE
1085 # http://www.lake-cumberland.com/life/archive/news990129time.shtml
1086 # (1999-01-29) via WKYM-101.7:
1087 # Clinton County has joined Wayne County in asking the DoT to change from
1088 # the Central to the Eastern time zone.... The Wayne County government made
1089 # the same request in December. And while Russell County officials have not
1090 # taken action, the majority of respondents to a poll conducted there in
1091 # August indicated they would like to change to "fast time" also.
1157 # one hour in 1914." This change is not in Shanks. We have no more
1158 # info, so omit this for now.
1159 #
1160 # From Paul Eggert (2017-07-26):
1161 # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01
1162 # until 10-29 00:01, I now see multiple reports that this is incorrect.
1163 # For example, according to a 50-year anniversary report about the 1967
1164 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time
1165 # the last fly ball of the doubleheader settled into the glove of leftfielder
1166 # Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving
1167 # time, so light was already starting to fail. Twilight was made even deeper
1168 # by billowing columns of smoke that ascended in an unbroken wall north of the
1169 # ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two
1170 # at home vs. Yankees. Detroit Free Press 2017-07-23.
1171 # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/
1172 #
1173 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1174 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1175 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
1176 Rule Detroit 1948 only - Sep lastSun 2:00 0 S
1177 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1178 Zone America/Detroit -5:32:11 - LMT 1905
1179 -6:00 - CST 1915 May 15 2:00
1180 -5:00 - EST 1942
1181 -5:00 US E%sT 1946
1182 -5:00 Detroit E%sT 1973
1183 -5:00 US E%sT 1975
1184 -5:00 - EST 1975 Apr 27 2:00
1185 -5:00 US E%sT
1186 #
1187 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
1188 # switched from EST to CST/CDT in 1973.
1189 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1190 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
1191 Rule Menominee 1946 only - Sep lastSun 2:00 0 S
1192 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
1193 Rule Menominee 1966 only - Oct lastSun 2:00 0 S
1194 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1195 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
1196 -6:00 US C%sT 1946
1197 -6:00 Menominee C%sT 1969 Apr 27 2:00
1198 -5:00 - EST 1973 Apr 29 2:00
1199 -6:00 US C%sT
1200
1201 # Navassa
1202 # administered by the US Fish and Wildlife Service
1203 # claimed by US under the provisions of the 1856 Guano Islands Act
1204 # also claimed by Haiti
1205 # occupied 1857/1900 by the Navassa Phosphate Co
1206 # US lighthouse 1917/1996-09
1207 # currently uninhabited
1208 # see Mark Fineman, "An Isle Rich in Guano and Discord",
1209 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1210 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
1211
1212 ################################################################################
1213
1214
1408 # changes to the Newfoundland Standard Time Act have been proclaimed.
1409 # The change in the Act stipulates that the change from Daylight Savings
1410 # Time to Standard Time and from Standard Time to Daylight Savings Time
1411 # now occurs at 2:00AM.
1412 # ...
1413 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1414 # ...
1415 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery
1416 # Office of the Chief Information Officer
1417 # Executive Council
1418 # Government of Newfoundland & Labrador
1419
1420 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
1421 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
1422 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
1423 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1424 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D
1425 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S
1426 #
1427 # St John's has an apostrophe, but Posix file names can't have apostrophes.
1428 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1429 Zone America/St_Johns -3:30:52 - LMT 1884
1430 -3:30:52 StJohns N%sT 1918
1431 -3:30:52 Canada N%sT 1919
1432 -3:30:52 StJohns N%sT 1935 Mar 30
1433 -3:30 StJohns N%sT 1942 May 11
1434 -3:30 Canada N%sT 1946
1435 -3:30 StJohns N%sT 2011 Nov
1436 -3:30 Canada N%sT
1437
1438 # most of east Labrador
1439
1440 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1441 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1442 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1443 -3:30:52 - NST 1918
1444 -3:30:52 Canada N%sT 1919
1445 -3:30:52 - NST 1935 Mar 30
1446 -3:30 - NST 1936
1447 -3:30 StJohns N%sT 1942 May 11
1448 -3:30 Canada N%sT 1946
1449 -3:30 StJohns N%sT 1966 Mar 15 2:00
1450 -4:00 StJohns A%sT 2011 Nov
1451 -4:00 Canada A%sT
1452
1453
1454 # west Labrador, Nova Scotia, Prince Edward I
1455
1456 # From Brian Inglis (2015-07-20):
1457 # From the historical weather station records available at:
1458 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1459 # Sydney shares the same time history as Glace Bay, so was
1460 # likely to be the same across the island....
1461 # Sydney, as the capital and most populous location, or Cape Breton, would
1495 Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1496 Rule Halifax 1933 only - Oct 2 0:00 0 S
1497 Rule Halifax 1934 only - May 20 0:00 1:00 D
1498 Rule Halifax 1934 only - Sep 16 0:00 0 S
1499 Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1500 Rule Halifax 1935 only - Sep 30 0:00 0 S
1501 Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1502 Rule Halifax 1936 only - Sep 14 0:00 0 S
1503 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1504 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1505 Rule Halifax 1939 only - May 28 0:00 1:00 D
1506 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1507 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1508 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1509 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1510 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1511 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1512 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1513 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1514 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
1515 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1516 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
1517 -4:00 Halifax A%sT 1918
1518 -4:00 Canada A%sT 1919
1519 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1520 -4:00 Canada A%sT 1946
1521 -4:00 Halifax A%sT 1974
1522 -4:00 Canada A%sT
1523 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1524 -4:00 Canada A%sT 1953
1525 -4:00 Halifax A%sT 1954
1526 -4:00 - AST 1972
1527 -4:00 Halifax A%sT 1974
1528 -4:00 Canada A%sT
1529
1530 # New Brunswick
1531
1532 # From Paul Eggert (2007-01-31):
1533 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1534 # says they changed at 00:01 through 2006, and
1535 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1536 # clear that this was the case since at least 1993.
1537 # For now, assume it started in 1993.
1538
1539 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1540 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1541 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1542 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1543 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1544 Rule Moncton 1939 only - May 27 1:00 1:00 D
1545 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1546 Rule Moncton 1940 only - May 19 1:00 1:00 D
1547 Rule Moncton 1941 only - May 4 1:00 1:00 D
1548 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1549 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1550 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1551 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1552 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1553 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1554 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1555 -5:00 - EST 1902 Jun 15
1556 -4:00 Canada A%sT 1933
1557 -4:00 Moncton A%sT 1942
1558 -4:00 Canada A%sT 1946
1559 -4:00 Moncton A%sT 1973
1560 -4:00 Canada A%sT 1993
1561 -4:00 Moncton A%sT 2007
1562 -4:00 Canada A%sT
1563
1564 # Quebec
1565
1566 # From Paul Eggert (2015-03-24):
1567 # See America/Toronto for most of Quebec, including Montreal.
1568 #
1569 # Matthews and Vincent (1998) also write that Quebec east of the -63
1570 # meridian is supposed to observe AST, but residents as far east as
1571 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1572 # The Quebec department of justice writes in
1573 # "The situation in Minganie and Basse-Côte-Nord"
1574 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1575 # that the coastal strip from just east of Natashquan to Blanc-Sablon
1576 # observes Atlantic standard time all year round.
1577 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1578 # says this common practice was codified into law as of 2007.
1579 # For lack of better info, guess this practice began around 1970, contra to
1580 # Shanks & Pottenger who have this region observing AST/ADT.
1581
1582 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1583 Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1584 -4:00 Canada A%sT 1970
1585 -4:00 - AST
1586
1587 # Ontario
1588
1589 # From Paul Eggert (2006-07-09):
1590 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1591 # Toronto.
1592 # Thunder Bay skipped DST in 1973.
1593 # Many smaller locales did not observe peacetime DST until 1974;
1594 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1595 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1596
1597 # From Mark Brader (2003-07-26):
1598 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1599 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1600 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1601 # have already done so. In Orillia DST was to run until Saturday,
1602 # 1912-08-31 (no time mentioned), but it was met with considerable
1730 # Manitoba Not used.
1731 # Saskatchewan In Regina only.
1732 # Alberta Not used.
1733 # British Columbia Not used.
1734 #
1735 # With some exceptions, the use of daylight saving may be said to be limited
1736 # to those cities and towns lying between Quebec city and Windsor, Ont.
1737
1738 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1739 Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1740 Rule Toronto 1919 only - Oct 26 0:00 0 S
1741 Rule Toronto 1920 only - May 2 2:00 1:00 D
1742 Rule Toronto 1920 only - Sep 26 0:00 0 S
1743 Rule Toronto 1921 only - May 15 2:00 1:00 D
1744 Rule Toronto 1921 only - Sep 15 2:00 0 S
1745 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
1746 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1747 # was meant.
1748 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1749 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1750 Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1751 Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1752 Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1753 Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1754 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
1755 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
1756 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
1757 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S
1758 Rule Toronto 1949 only - Nov lastSun 0:00 0 S
1759 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
1760 Rule Toronto 1950 only - Nov lastSun 2:00 0 S
1761 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
1762 # Shanks & Pottenger say Toronto ended DST a week early in 1971,
1763 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1764 # is wrong, and that he had confirmed it by checking the 1971-10-30
1765 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1766 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1767
1768 # From Paul Eggert (2003-07-27):
1769 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1770 # Port Arthur, Ontario, the principle of the Bill has been in
1771 # operation for the past three years, and in the City of Moose Jaw,
1772 # Saskatchewan, for one year."
1773
1774 # From David Bryan via Tory Tronrud, Director/Curator,
1775 # Thunder Bay Museum (2003-11-12):
1776 # There is some suggestion, however, that, by-law or not, daylight
1777 # savings time was being practiced in Fort William and Port Arthur
1778 # before 1909.... [I]n 1910, the line between the Eastern and Central
1779 # Time Zones was permanently moved about two hundred miles west to
1780 # include the Thunder Bay area.... When Canada adopted daylight
1781 # savings time in 1916, Fort William and Port Arthur, having done so
1782 # already, did not change their clocks.... During the Second World
1783 # War,... [t]he cities agreed to implement DST during the summer
1784 # months for the remainder of the war years.
1785
1786 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1787 Zone America/Toronto -5:17:32 - LMT 1895
1788 -5:00 Canada E%sT 1919
1789 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1790 -5:00 Canada E%sT 1946
1791 -5:00 Toronto E%sT 1974
1792 -5:00 Canada E%sT
1793 Zone America/Thunder_Bay -5:57:00 - LMT 1895
1794 -6:00 - CST 1910
1795 -5:00 - EST 1942
1796 -5:00 Canada E%sT 1970
1797 -5:00 Toronto E%sT 1973
1798 -5:00 - EST 1974
1799 -5:00 Canada E%sT
1800 Zone America/Nipigon -5:53:04 - LMT 1895
1801 -5:00 Canada E%sT 1940 Sep 29
1802 -5:00 1:00 EDT 1942 Feb 9 2:00s
1803 -5:00 Canada E%sT
1804 Zone America/Rainy_River -6:18:16 - LMT 1895
1805 -6:00 Canada C%sT 1940 Sep 29
1806 -6:00 1:00 CDT 1942 Feb 9 2:00s
1841 Rule Winn 1937 only - May 16 2:00 1:00 D
1842 Rule Winn 1937 only - Sep 26 2:00 0 S
1843 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1844 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
1845 Rule Winn 1945 only - Sep lastSun 2:00 0 S
1846 Rule Winn 1946 only - May 12 2:00 1:00 D
1847 Rule Winn 1946 only - Oct 13 2:00 0 S
1848 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1849 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1850 Rule Winn 1950 only - May 1 2:00 1:00 D
1851 Rule Winn 1950 only - Sep 30 2:00 0 S
1852 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1853 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1854 Rule Winn 1959 only - Oct lastSun 2:00 0 S
1855 Rule Winn 1960 only - Sep lastSun 2:00 0 S
1856 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1857 Rule Winn 1963 only - Sep 22 2:00 0 S
1858 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1859 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1860 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
1861 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1862 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
1863 -6:00 Winn C%sT 2006
1864 -6:00 Canada C%sT
1865
1866
1867 # Saskatchewan
1868
1869 # From Mark Brader (2003-07-26):
1870 # The first actual adoption of DST in Canada was at the municipal
1871 # level. As the [Toronto] Star put it (1912-06-07), "While people
1872 # elsewhere have long been talking of legislation to save daylight,
1873 # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1874 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1875 # presumably late evening, as below), and would run until "the end of
1876 # the summer". The discrepancy between municipal time and railroad
1877 # time was noted.
1878
1879 # From Paul Eggert (2003-07-27):
1880 # Willett (1914-03) notes that DST "has been in operation ... in the
1881 # City of Moose Jaw, Saskatchewan, for one year."
1882
1883 # From Paul Eggert (2019-04-26):
1884 # Chris Pearce's book "The Great Daylight Saving Time Controversy" (2017)
1885 # says that Regina observed DST in 1914-1917. No dates and times,
1886 # unfortunately. It also says that in 1914 Saskatoon observed DST
1887 # from 1 June to 6 July, and that DST was also tried out in Davidson,
1888 # Melfort, and Prince Albert.
1889
1890 # From Paul Eggert (2006-03-22):
1891 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1892 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1893 # Other western towns (e.g. Lloydminster) are like Edmonton.
1894 # Matthews and Vincent (1998) write that Denare Beach and Creighton
1895 # are like Winnipeg, in violation of Saskatchewan law.
1896
1897 # From W. Jones (1992-11-06):
1898 # The. . .below is based on information I got from our law library, the
1899 # provincial archives, and the provincial Community Services department.
1900 # A precise history would require digging through newspaper archives, and
1901 # since you didn't say what you wanted, I didn't bother.
1902 #
1903 # Saskatchewan is split by a time zone meridian (105W) and over the years
1904 # the boundary became pretty ragged as communities near it reevaluated
1905 # their affiliations in one direction or the other. In 1965 a provincial
1906 # referendum favoured legislating common time practices.
1907 #
1908 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1909 # Saskatchewan 1978) was proclaimed, and established that the eastern
1932 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1933 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1934 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1935 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1936 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
1937 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1938 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
1939 Rule Regina 1945 only - Sep lastSun 2:00 0 S
1940 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1941 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
1942 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1943 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1944 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
1945 Rule Regina 1959 only - Oct lastSun 2:00 0 S
1946 #
1947 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1948 Rule Swift 1957 only - Oct lastSun 2:00 0 S
1949 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1950 Rule Swift 1959 only - Oct lastSun 2:00 0 S
1951 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1952 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1953 Zone America/Regina -6:58:36 - LMT 1905 Sep
1954 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1955 -6:00 - CST
1956 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1957 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1958 -7:00 Regina M%sT 1950
1959 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1960 -6:00 - CST
1961
1962
1963 # Alberta
1964
1965 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1966 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1967 Rule Edm 1918 only - Oct 27 2:00 0 S
1968 Rule Edm 1919 only - May 27 2:00 0 S
1969 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1970 Rule Edm 1920 only - Oct lastSun 2:00 0 S
1971 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1972 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1973 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
1974 Rule Edm 1945 only - Sep lastSun 2:00 0 S
1975 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1976 Rule Edm 1947 only - Sep lastSun 2:00 0 S
1977 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1978 Rule Edm 1967 only - Oct lastSun 2:00 0 S
1979 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1980 Rule Edm 1969 only - Oct lastSun 2:00 0 S
1981 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1982 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
1983 # Zone NAME STDOFF RULES FORMAT [UNTIL]
1984 Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1985 -7:00 Edm M%sT 1987
1986 -7:00 Canada M%sT
1987
1988
1989 # British Columbia
1990
1991 # From Paul Eggert (2006-03-22):
1992 # Shanks & Pottenger write that since 1970 most of this region has
1993 # been like Vancouver.
1994 # Dawson Creek uses MST. Much of east BC is like Edmonton.
1995 # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1996
1997 # It seems though that (re: Creston) is not entirely correct:
1998
1999 # From Chris Walton (2011-12-01):
2000 # There are two areas within the Canadian province of British Columbia
2001 # that do not currently observe daylight saving:
2002 # a) The Creston Valley (includes the town of Creston and surrounding area)
2003 # b) The eastern half of the Peace River Regional District
2056 # From Tim Parenti (2015-09-23):
2057 # This requires a new zone for the Northern Rockies Regional Municipality,
2058 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a
2059 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has
2060 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
2061 # 2015-03-08.
2062 #
2063 # From Paul Eggert (2015-09-23):
2064 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
2065
2066 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2067 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
2068 Rule Vanc 1918 only - Oct 27 2:00 0 S
2069 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
2070 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
2071 Rule Vanc 1945 only - Sep 30 2:00 0 S
2072 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
2073 Rule Vanc 1946 only - Oct 13 2:00 0 S
2074 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
2075 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
2076 # Zone NAME STDOFF RULES FORMAT [UNTIL]
2077 Zone America/Vancouver -8:12:28 - LMT 1884
2078 -8:00 Vanc P%sT 1987
2079 -8:00 Canada P%sT
2080 Zone America/Dawson_Creek -8:00:56 - LMT 1884
2081 -8:00 Canada P%sT 1947
2082 -8:00 Vanc P%sT 1972 Aug 30 2:00
2083 -7:00 - MST
2084 Zone America/Fort_Nelson -8:10:47 - LMT 1884
2085 -8:00 Vanc P%sT 1946
2086 -8:00 - PST 1947
2087 -8:00 Vanc P%sT 1987
2088 -8:00 Canada P%sT 2015 Mar 8 2:00
2089 -7:00 - MST
2090 Zone America/Creston -7:46:04 - LMT 1884
2091 -7:00 - MST 1916 Oct 1
2092 -8:00 - PST 1918 Jun 2
2093 -7:00 - MST
2094
2095 # Northwest Territories, Nunavut, Yukon
2096
2127 #
2128 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
2129 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
2130 # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
2131 # Yukon Interpretation Ordinance
2132 # Yukon standard time is the local mean time at the one hundred and
2133 # thirty-fifth meridian.
2134 #
2135 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
2136 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
2137 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
2138 # Yukon Interpretation Ordinance, 1955, Chap. 16.
2139 #
2140 # (1) Subject to this section, standard time shall be reckoned as nine
2141 # hours behind Greenwich Time and called Yukon Standard Time.
2142 #
2143 # (2) Notwithstanding subsection (1), the Commissioner may make regulations
2144 # varying the manner of reckoning standard time.
2145 #
2146 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
2147 # [no online source found]
2148 #
2149 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
2150 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
2151 # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
2152 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
2153 #
2154 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
2155 # Territory on 27th January, 1966, is hereby revoked.
2156 #
2157 # 2. Yukon (East) Standard Time as defined by section 36 of the
2158 # Interpretation Ordinance from and after mid-night on the 28th day of May,
2159 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that
2160 # is to say, eight hours behind Greenwich Time in the area of the Yukon
2161 # Territory lying east of the 138th degree longitude west.
2162 #
2163 # 3. In the remainder of the Territory, lying west of the 138th degree
2164 # longitude west, Yukon (West) Standard Time shall be reckoned as nine
2165 # hours behind Greenwich Time.
2166 #
2167 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2168 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2169 # C.O. 1973/214 INTERPRETATION ACT ...
2170 #
2171 # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
2172 # revoked.
2173 #
2174 # 2. Yukon Standard Time as defined by section 36 of the Interpretation
2175 # Act from and after midnight on the twenty-eighth day of October, 1973
2176 # shall be reckoned in the same manner as Pacific Standard Time, that is
2177 # to say eight hours behind Greenwich Time.
2178 #
2179 # * O.I.C. 1980/02 INTERPRETATION ACT
2180 # [no online source found]
2181 #
2182 # * Yukon Daylight Saving Time, YOIC 1987/56
2183 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2184 # O.I.C. 1987/056 INTERPRETATION ACT ...
2185 #
2186 # In every year between
2187 # (a) two o'clock in the morning in the first Sunday in April, and
2188 # (b) two o'clock in the morning in the last Sunday in October,
2189 # Standard Time shall be reckoned as seven hours behind Greenwich Time and
2190 # called Yukon Daylight Saving Time.
2191 # ...
2192 # Dated ... 9th day of March, A.D., 1987.
2193 #
2194 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
2195 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2196 # O.I.C. 2006/127 INTERPRETATION ACT ...
2197 #
2198 # 1. In Yukon each year the time for general purposes shall be 7 hours
2199 # behind Greenwich mean time during the period commencing at two o'clock
2200 # in the forenoon on the second Sunday of March and ending at two o'clock
2376 # search on the weather through Env. Canada. web site"
2377 #
2378 # If I had realized the Stephanie did not live in Resolute Bay I would
2379 # never have contacted her. I now believe that all the information I
2380 # obtained in November 2008 should be ignored...
2381 # I apologize for reporting incorrect information in 2008.
2382
2383 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2384 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
2385 Rule NT_YK 1918 only - Oct 27 2:00 0 S
2386 Rule NT_YK 1919 only - May 25 2:00 1:00 D
2387 Rule NT_YK 1919 only - Nov 1 0:00 0 S
2388 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
2389 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
2390 Rule NT_YK 1945 only - Sep 30 2:00 0 S
2391 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
2392 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
2393 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
2394 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
2395 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
2396 # Zone NAME STDOFF RULES FORMAT [UNTIL]
2397 # aka Panniqtuuq
2398 Zone America/Pangnirtung 0 - -00 1921 # trading post est.
2399 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
2400 -5:00 Canada E%sT 1999 Oct 31 2:00
2401 -6:00 Canada C%sT 2000 Oct 29 2:00
2402 -5:00 Canada E%sT
2403 # formerly Frobisher Bay
2404 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est.
2405 -5:00 NT_YK E%sT 1999 Oct 31 2:00
2406 -6:00 Canada C%sT 2000 Oct 29 2:00
2407 -5:00 Canada E%sT
2408 # aka Qausuittuq
2409 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded
2410 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2411 -5:00 - EST 2001 Apr 1 3:00
2412 -6:00 Canada C%sT 2006 Oct 29 2:00
2413 -5:00 - EST 2007 Mar 11 3:00
2414 -6:00 Canada C%sT
2415 # aka Kangiqiniq
2416 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded
2523 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2524 # [translated], says "summer time will ... take effect on the first Sunday
2525 # in May, and end on the last Sunday of September.
2526
2527 # From Arthur David Olson (2001-01-25):
2528 # The 2001-01-24 traditional Washington Post contained the page one
2529 # story "Timely Issue Divides Mexicans."...
2530 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2531 # ... Mexico City Mayor López Obrador "...is threatening to keep
2532 # Mexico City and its 20 million residents on a different time than
2533 # the rest of the country..." In particular, López Obrador would abolish
2534 # observation of Daylight Saving Time.
2535
2536 # Official statute published by the Energy Department
2537 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2538 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2539 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03).
2540
2541 # From Paul Eggert (2001-03-03):
2542 #
2543 # https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html
2544 # James F. Smith writes in today's LA Times
2545 # * Sonora will continue to observe standard time.
2546 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
2547 # the Federal District will not adopt DST.
2548 # * 4 of 16 district leaders announced they'll ignore the decree.
2549 # * The decree does not affect federal-controlled facilities including
2550 # the airport, banks, hospitals, and schools.
2551 #
2552 # For now we'll assume that the Federal District will bow to federal rules.
2553
2554 # From Jesper Nørgaard (2001-04-01):
2555 # I found some references to the Mexican application of daylight
2556 # saving, which modifies what I had already sent you, stating earlier
2557 # that a number of northern Mexican states would go on daylight
2558 # saving. The modification reverts this to only cover Baja California
2559 # (Norte), while all other states (except Sonora, who has no daylight
2560 # saving all year) will follow the original decree of president
2561 # Vicente Fox, starting daylight saving May 6, 2001 and ending
2562 # September 30, 2001.
2563 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
2650 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2651 # of Quintana Roo.
2652 # 5- The islands, reefs and keys shall take their timezone from the
2653 # longitude they are located at.
2654
2655 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2656 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2657 Rule Mexico 1939 only - Jun 25 0:00 0 S
2658 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2659 Rule Mexico 1941 only - Apr 1 0:00 0 S
2660 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2661 Rule Mexico 1944 only - May 1 0:00 0 S
2662 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2663 Rule Mexico 1950 only - Jul 30 0:00 0 S
2664 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2665 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2666 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2667 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2668 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2669 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2670 # Zone NAME STDOFF RULES FORMAT [UNTIL]
2671 # Quintana Roo; represented by Cancún
2672 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2673 -6:00 - CST 1981 Dec 23
2674 -5:00 Mexico E%sT 1998 Aug 2 2:00
2675 -6:00 Mexico C%sT 2015 Feb 1 2:00
2676 -5:00 - EST
2677 # Campeche, Yucatán; represented by Mérida
2678 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2679 -6:00 - CST 1981 Dec 23
2680 -5:00 - EST 1982 Dec 2
2681 -6:00 Mexico C%sT
2682 # Coahuila, Nuevo León, Tamaulipas (near US border)
2683 # This includes the following municipalities:
2684 # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava,
2685 # Guerrero, Hidalgo.
2686 # in Nuevo León: Anáhuac, Los Aldama.
2687 # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
2688 # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
2689 # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal,
2690 # 2016-03-12
2843 # no information
2844
2845 ###############################################################################
2846
2847 # Anguilla
2848 # Antigua and Barbuda
2849 # See America/Port_of_Spain.
2850
2851 # Bahamas
2852 #
2853 # For 1899 Milne gives -5:09:29.5; round that.
2854 #
2855 # From Sue Williams (2006-12-07):
2856 # The Bahamas announced about a month ago that they plan to change their DST
2857 # rules to sync with the U.S. starting in 2007....
2858 # http://www.jonesbahamas.com/?c=45&a=10412
2859
2860 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2861 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2862 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
2863 # Zone NAME STDOFF RULES FORMAT [UNTIL]
2864 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2
2865 -5:00 Bahamas E%sT 1976
2866 -5:00 US E%sT
2867
2868 # Barbados
2869
2870 # For 1899 Milne gives -3:58:29.2; round that.
2871
2872 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2873 Rule Barb 1977 only - Jun 12 2:00 1:00 D
2874 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2875 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2876 Rule Barb 1979 only - Sep 30 2:00 0 S
2877 Rule Barb 1980 only - Sep 25 2:00 0 S
2878 # Zone NAME STDOFF RULES FORMAT [UNTIL]
2879 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown
2880 -3:58:29 - BMT 1932 # Bridgetown Mean Time
2881 -4:00 Barb A%sT
2882
2883 # Belize
2884 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2885 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2886 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530
2887 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST
2888 Rule Belize 1973 only - Dec 5 0:00 1:00 CDT
2889 Rule Belize 1974 only - Feb 9 0:00 0 CST
2890 Rule Belize 1982 only - Dec 18 0:00 1:00 CDT
2891 Rule Belize 1983 only - Feb 12 0:00 0 CST
2892 # Zone NAME STDOFF RULES FORMAT [UNTIL]
2893 Zone America/Belize -5:52:48 - LMT 1912 Apr
2894 -6:00 Belize %s
2895
2896 # Bermuda
2897
2898 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2899 # Bermuda dockyard, Ireland I; round that.
2900
2901 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2902
2903 # Next year, however, clocks in the US will go forward on the second Sunday
2904 # in March, until the first Sunday in November. And, after the Time Zone
2905 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2906 # Friday, the same thing will happen in Bermuda.
2907 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2908
2909 # Zone NAME STDOFF RULES FORMAT [UNTIL]
2910 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton
2911 -4:00 - AST 1974 Apr 28 2:00
2912 -4:00 Canada A%sT 1976
2913 -4:00 US A%sT
2914
2915 # Cayman Is
2916 # See America/Panama.
2917
2918 # Costa Rica
2919
2920 # Milne gives -5:36:13.3 as San José mean time; round to nearest.
2921
2922 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2923 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2924 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2925 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2926 # IATA SSIM (1991-09) says the following was at 1:00;
2927 # go with Shanks & Pottenger.
2928 Rule CR 1991 only - Jul 1 0:00 0 S
2929 Rule CR 1992 only - Mar 15 0:00 0 S
2930 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2931 # Zone NAME STDOFF RULES FORMAT [UNTIL]
2932 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José
2933 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time
2934 -6:00 CR C%sT
2935 # Coco
2936 # no information; probably like America/Costa_Rica
2937
2938 # Cuba
2939
2940 # From Paul Eggert (2013-02-21):
2941 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2942 # for the port, and -5:30 for meteorological observations.
2943 # For now, stick with Shanks & Pottenger.
2944
2945 # From Arthur David Olson (1999-03-29):
2946 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2947 # the Cuban National Team and the Baltimore Orioles was carried live on
2948 # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2949 # During the game, play-by-play announcer Jim Hunter noted that
2950 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2951 # Time today." (The "two hour" remark referred to losing one hour of
3117 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
3118 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
3119 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
3120 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
3121 Rule Cuba 1996 only - Oct 6 0:00s 0 S
3122 Rule Cuba 1997 only - Oct 12 0:00s 0 S
3123 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
3124 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
3125 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D
3126 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D
3127 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S
3128 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
3129 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
3130 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D
3131 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D
3132 Rule Cuba 2011 only - Nov 13 0:00s 0 S
3133 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D
3134 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S
3135 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D
3136
3137 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3138 Zone America/Havana -5:29:28 - LMT 1890
3139 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
3140 -5:00 Cuba C%sT
3141
3142 # Dominica
3143 # See America/Port_of_Spain.
3144
3145 # Dominican Republic
3146
3147 # From Steffen Thorsen (2000-10-30):
3148 # Enrique Morales reported to me that the Dominican Republic has changed the
3149 # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
3150 # http://www.listin.com.do/antes/261000/republica/princi.html
3151
3152 # From Paul Eggert (2000-12-04):
3153 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
3154
3155 # From Rives McDow (2000-12-01):
3156 # Dominican Republic changed its mind and presidential decree on Tuesday,
3157 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
3158 # Dominican Republic will be reverting to 8 hours from the International Date
3159 # Line, and will not be using DST in the foreseeable future. The reason they
3160 # decided to use DST was to be in synch with Puerto Rico, who was also going
3161 # to implement DST. When Puerto Rico didn't implement DST, the president
3162 # decided to revert.
3163
3164
3165 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3166 Rule DR 1966 only - Oct 30 0:00 1:00 EDT
3167 Rule DR 1967 only - Feb 28 0:00 0 EST
3168 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430
3169 Rule DR 1970 only - Feb 21 0:00 0 EST
3170 Rule DR 1971 only - Jan 20 0:00 0 EST
3171 Rule DR 1972 1974 - Jan 21 0:00 0 EST
3172 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3173 Zone America/Santo_Domingo -4:39:36 - LMT 1890
3174 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
3175 -5:00 DR %s 1974 Oct 27
3176 -4:00 - AST 2000 Oct 29 2:00
3177 -5:00 US E%sT 2000 Dec 3 1:00
3178 -4:00 - AST
3179
3180 # El Salvador
3181
3182 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3183 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
3184 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
3185 # There are too many San Salvadors elsewhere, so use America/El_Salvador
3186 # instead of America/San_Salvador.
3187 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3188 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
3189 -6:00 Salv C%sT
3190
3191 # Grenada
3192 # Guadeloupe
3193 # St Barthélemy
3194 # St Martin (French part)
3195 # See America/Port_of_Spain.
3196
3197 # Guatemala
3198 #
3199 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3200 # Diario Co Latino, at
3201 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
3202 # says in an article dated 2006-04-19 that the Guatemalan government had
3203 # decided on that date to advance official time by 60 minutes, to lessen the
3204 # impact of the elevated cost of oil.... Daylight saving time will last from
3205 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3206 # From Paul Eggert (2006-06-22):
3207 # The Ministry of Energy and Mines, press release CP-15/2006
3208 # (2006-04-19), says DST ends at 24:00. See
3209 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
3210
3211 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3212 Rule Guat 1973 only - Nov 25 0:00 1:00 D
3213 Rule Guat 1974 only - Feb 24 0:00 0 S
3214 Rule Guat 1983 only - May 21 0:00 1:00 D
3215 Rule Guat 1983 only - Sep 22 0:00 0 S
3216 Rule Guat 1991 only - Mar 23 0:00 1:00 D
3217 Rule Guat 1991 only - Sep 7 0:00 0 S
3218 Rule Guat 2006 only - Apr 30 0:00 1:00 D
3219 Rule Guat 2006 only - Oct 1 0:00 0 S
3220 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3221 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
3222 -6:00 Guat C%sT
3223
3224 # Haiti
3225 # From Gwillim Law (2005-04-15):
3226 # Risto O. Nykänen wrote me that Haiti is now on DST.
3227 # I searched for confirmation, and I found a press release
3228 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3229 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says:
3230 #
3231 # "The Prime Minister's Communication Office notifies the public in general
3232 # and the press in particular that, following a decision of the Interior
3233 # Ministry and the Territorial Collectivities [I suppose that means the
3234 # provinces], Haiti will move to Eastern Daylight Time in the night from next
3235 # Saturday the 2nd to Sunday the 3rd.
3236 #
3237 # "Consequently, the Prime Minister's Communication Office wishes to inform
3238 # the population that the country's clocks will be set forward one hour
3239 # starting at midnight. This provision will hold until the last Saturday in
3240 # October 2005.
3286 # From Steffen Thorsen (2017-03-12):
3287 # We have received 4 mails from different people telling that Haiti
3288 # has started DST again today, and this source seems to confirm that,
3289 # I have not been able to find a more authoritative source:
3290 # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3291
3292 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3293 Rule Haiti 1983 only - May 8 0:00 1:00 D
3294 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
3295 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
3296 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3297 # Go with IATA.
3298 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
3299 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
3300 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
3301 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
3302 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D
3303 Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S
3304 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D
3305 Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S
3306 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3307 Zone America/Port-au-Prince -4:49:20 - LMT 1890
3308 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
3309 -5:00 Haiti E%sT
3310
3311 # Honduras
3312 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3313
3314 # From Paul Eggert (2006-05-05):
3315 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3316 # saying Honduras will start using DST midnight Saturday, effective 4
3317 # months until September. La Tribuna reported today
3318 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3319 # of Honduras, refused to back down on this.
3320
3321 # From Jesper Nørgaard Welen (2006-08-08):
3322 # It seems that Honduras has returned from DST to standard time this Monday at
3323 # 00:00 hours (prolonging Sunday to 25 hours duration).
3324 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3325
3326 # From Paul Eggert (2006-08-08):
3327 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3328 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3329 # It mentions executive decree 18-2006.
3330
3331 # From Steffen Thorsen (2006-08-17):
3332 # Honduras will observe DST from 2007 to 2009, exact dates are not
3333 # published, I have located this authoritative source:
3334 # http://www.presidencia.gob.hn/noticia.aspx?nId=47
3335
3336 # From Steffen Thorsen (2007-03-30):
3337 # http://www.laprensahn.com/pais_nota.php?id04962=7386
3338 # So it seems that Honduras will not enter DST this year....
3339
3340 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3341 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
3342 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
3343 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
3344 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3345 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3346 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3347 -6:00 Hond C%sT
3348 #
3349 # Great Swan I ceded by US to Honduras in 1972
3350
3351 # Jamaica
3352 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3353 # unspecified official document, and says "This time is used throughout the
3354 # island". Go with Milne. Round to the nearest second as required by zic.
3355 #
3356 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3357 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3358 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that
3359 # Manley's supporters associated this act with Manley's nickname "Joshua"
3360 # (recall that in the Bible the sun stood still at Joshua's request),
3361 # and with the Rod of Correction which Manley said he had received from
3362 # Haile Selassie, Emperor of Ethiopia. See:
3363 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3364 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3365 #
3366 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3367 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston
3368 -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3369 -5:00 - EST 1974
3370 -5:00 US E%sT 1984
3371 -5:00 - EST
3372
3373 # Martinique
3374 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3375 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3376 -4:04:20 - FFMT 1911 May # Fort-de-France MT
3377 -4:00 - AST 1980 Apr 6
3378 -4:00 1:00 ADT 1980 Sep 28
3379 -4:00 - AST
3380
3381 # Montserrat
3382 # See America/Port_of_Spain.
3383
3384 # Nicaragua
3385 #
3386 # This uses Shanks & Pottenger for times before 2005.
3387 #
3388 # From Steffen Thorsen (2005-04-12):
3389 # I've got reports from 8 different people that Nicaragua just started
3390 # DST on Sunday 2005-04-10, in order to save energy because of
3391 # expensive petroleum. The exact end date for DST is not yet
3392 # announced, only "September" but some sites also say "mid-September".
3393 # Some background information is available on the President's official site:
3394 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3418 # From Jesper Nørgaard Welen (2006-05-05):
3419 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3420 # (my informal translation)
3421 # By order of the president of the republic, Enrique Bolaños, Nicaragua
3422 # advanced by sixty minutes their official time, yesterday at 2 in the
3423 # morning, and will stay that way until 30th of September.
3424 #
3425 # From Jesper Nørgaard Welen (2006-09-30):
3426 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3427 # My informal translation runs:
3428 # The natural sun time is restored in all the national territory, in that the
3429 # time is returned one hour at 01:00 am of October 1 of 2006.
3430 #
3431 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3432 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
3433 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
3434 Rule Nic 2005 only - Apr 10 0:00 1:00 D
3435 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
3436 Rule Nic 2006 only - Apr 30 2:00 1:00 D
3437 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
3438 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3439 Zone America/Managua -5:45:08 - LMT 1890
3440 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
3441 -6:00 - CST 1973 May
3442 -5:00 - EST 1975 Feb 16
3443 -6:00 Nic C%sT 1992 Jan 1 4:00
3444 -5:00 - EST 1992 Sep 24
3445 -6:00 - CST 1993
3446 -5:00 - EST 1997
3447 -6:00 Nic C%sT
3448
3449 # Panama
3450 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3451 Zone America/Panama -5:18:08 - LMT 1890
3452 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time
3453 -5:00 - EST
3454 Link America/Panama America/Cayman
3455
3456 # Puerto Rico
3457 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3458 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3459 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
3460 -4:00 - AST 1942 May 3
3461 -4:00 US A%sT 1946
3462 -4:00 - AST
3463
3464 # St Kitts-Nevis
3465 # St Lucia
3466 # See America/Port_of_Spain.
3467
3468 # St Pierre and Miquelon
3469 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3470 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3471 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
3472 -4:00 - AST 1980 May
3473 -3:00 - -03 1987
3474 -3:00 Canada -03/-02
3475
3476 # St Vincent and the Grenadines
3477 # See America/Port_of_Spain.
3478
3479 # Turks and Caicos
3480 #
3481 # From Chris Dunn in
3482 # https://bugs.debian.org/415007
3483 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3484 # daylight saving dates for time changes have been adjusted to match
3485 # the recent U.S. change of dates.
3486 #
3487 # From Brian Inglis (2007-04-28):
3488 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3489 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3490 # rows before that there is an out of date entry for Oct:
3496 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:
3497 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3498 # Model this as a switch from EST/EDT to AST ...
3499 # From Chris Walton (2014-11-04):
3500 # ... the TCI government appears to have delayed the switch to
3501 # "permanent daylight saving time" by one year....
3502 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3503 #
3504 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
3505 # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
3506 # during the summer months and Standard Time, also known as Local
3507 # Time, during the winter months with effect from April 2018 ...
3508 # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
3509 #
3510 # From Paul Eggert (2017-08-26):
3511 # The date of effect of the spring 2018 change appears to be March 11,
3512 # which makes more sense. See: Hamilton D. Time change back
3513 # by March 2018 for TCI. Magnetic Media. 2017-08-25.
3514 # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
3515 #
3516 # Zone NAME STDOFF RULES FORMAT [UNTIL]
3517 Zone America/Grand_Turk -4:44:32 - LMT 1890
3518 -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3519 -5:00 - EST 1979
3520 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3521 -4:00 - AST 2018 Mar 11 3:00
3522 -5:00 US E%sT
3523
3524 # British Virgin Is
3525 # Virgin Is
3526 # See America/Port_of_Spain.
3527
3528
3529 # Local Variables:
3530 # coding: utf-8
3531 # End:
|