1 #
2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 #
4 # This code is free software; you can redistribute it and/or modify it
5 # under the terms of the GNU General Public License version 2 only, as
6 # published by the Free Software Foundation. Oracle designates this
7 # particular file as subject to the "Classpath" exception as provided
8 # by Oracle in the LICENSE file that accompanied this code.
9 #
10 # This code is distributed in the hope that it will be useful, but WITHOUT
11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 # version 2 for more details (a copy is included in the LICENSE file that
14 # accompanied this code).
15 #
16 # You should have received a copy of the GNU General Public License version
17 # 2 along with this work; if not, write to the Free Software Foundation,
18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 #
20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 # or visit www.oracle.com if you need additional information or have any
22 # questions.
23 #
24 # This file is in the public domain, so clarified as of
25 # 2009-05-17 by Arthur David Olson.
26
27 # also includes Central America and the Caribbean
28
29 # This file is by no means authoritative; if you think you know better,
30 # go ahead and edit the file (and please send any changes to
31 # tz@iana.org for general use in the future). For more, please see
32 # the file CONTRIBUTING in the tz distribution.
33
34 # From Paul Eggert (1999-03-22):
35 # A reliable and entertaining source about time zones is
36 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
37
38 ###############################################################################
39
40 # United States
41
42 # From Paul Eggert (1999-03-31):
43 # Howse writes (pp 121-125) that time zones were invented by
44 # Professor Charles Ferdinand Dowd (1825-1904),
45 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
46 # His pamphlet "A System of National Time for Railroads" (1870)
47 # was the result of his proposals at the Convention of Railroad Trunk Lines
48 # in New York City (1869-10). His 1870 proposal was based on Washington, DC,
49 # but in 1872-05 he moved the proposed origin to Greenwich.
50 # His proposal was adopted by the railroads on 1883-11-18 at 12:00,
51 # and the most of the country soon followed suit.
52
53 # From Paul Eggert (2005-04-16):
54 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
55 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
56
57 # From Paul Eggert (2006-03-22):
58 # A good source for time zone historical data in the US is
59 # Thomas G. Shanks, The American Atlas (5th edition),
60 # San Diego: ACS Publications, Inc. (1991).
61 # Make sure you have the errata sheet; the book is somewhat useless without it.
62 # It is the source for most of the pre-1991 US entries below.
63
64 # From Paul Eggert (2001-03-06):
65 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
66 # in his whimsical essay "An Economical Project for Diminishing the Cost
67 # of Light" published in the Journal de Paris (1784-04-26).
68 # Not everyone is happy with the results:
69 #
70 # I don't really care how time is reckoned so long as there is some
71 # agreement about it, but I object to being told that I am saving
72 # daylight when my reason tells me that I am doing nothing of the kind.
73 # I even object to the implication that I am wasting something
74 # valuable if I stay in bed after the sun has risen. As an admirer
75 # of moonlight I resent the bossy insistence of those who want to
76 # reduce my time for enjoying it. At the back of the Daylight Saving
77 # scheme I detect the bony, blue-fingered hand of Puritanism, eager
78 # to push people into bed earlier, and get them up earlier, to make
79 # them healthy, wealthy and wise in spite of themselves.
80 #
81 # -- Robertson Davies, The diary of Samuel Marchbanks,
82 # Clarke, Irwin (1947), XIX, Sunday
83 #
84 # For more about the first ten years of DST in the United States, see
85 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
86 # (Carnegie Library of Pittsburgh, 1927).
87 # http://www.clpgh.org/exhibit/dst.html
88 #
89 # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
90 # However, DST was imposed by the Standard Time Act of 1918, which
91 # was the first nationwide legal time standard, and apparently
92 # time was just called "Standard Time" or "Daylight Saving Time".
93
94 # From Arthur David Olson:
95 # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
96 # See, for example, the front page of the Saturday, 1974-10-26
97 # and Sunday, 1974-10-27 editions of the Washington Post.
98
99 # From Arthur David Olson:
100 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
101 # Daylight Saving Time in the US was by local option, except during wartime.
102
103 # From Arthur David Olson (2000-09-25):
104 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
105 # In the introduction, Oboler spoke of "Eastern Peace Time."
106 # An AltaVista search turned up:
107 # http://rowayton.org/rhs/hstaug45.html
108 # "When the time is announced over the radio now, it is 'Eastern Peace
109 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
110 # (August 1945) by way of confirmation.
111
112 # From Joseph Gallant citing
113 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
114 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
115 # to switch to London for Attlee's address, but the American people
116 # never got to hear his speech live. According to one press account,
117 # CBS' Bob Trout was first to announce the word of Japan's surrender,
118 # but a few seconds later, NBC, ABC and Mutual also flashed the word
119 # of surrender, all of whom interrupting the bells of Big Ben in
120 # London which were to precede Mr. Attlee's speech.
121
122 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From
123 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
124 #
125 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
126 # Any announcement from Asia would reach St. John's New York newsroom on a
127 # wire service teletype machine, which had prescribed signals for major news.
128 # Associated Press, for example, would ring five bells before spewing out
129 # typed copy of an important story, and 10 bells for news "of transcendental
130 # importance."
131 #
132 # On Aug. 14, stalling while talking steadily into the NBC networks' open
133 # microphone, St. John heard five bells and waited only to hear a sixth bell,
134 # before announcing confidently: "Ladies and gentlemen, World War II is over.
135 # The Japanese have agreed to our surrender terms."
136 #
137 # He had scored a 20-second scoop on other broadcasters.
138
139 # From Arthur David Olson (2005-08-22):
140 # Paul has been careful to use the "US" rules only in those locations
141 # that are part of the United States; this reflects the real scope of
142 # U.S. government action. So even though the "US" rules have changed
143 # in the latest release, other countries won't be affected.
144
145 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
146 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
147 Rule US 1918 1919 - Oct lastSun 2:00 0 S
148 Rule US 1942 only - Feb 9 2:00 1:00 W # War
149 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
150 Rule US 1945 only - Sep lastSun 2:00 0 S
151 Rule US 1967 2006 - Oct lastSun 2:00 0 S
152 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
153 Rule US 1974 only - Jan 6 2:00 1:00 D
154 Rule US 1975 only - Feb 23 2:00 1:00 D
155 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
156 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
157 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
158 Rule US 2007 max - Nov Sun>=1 2:00 0 S
159
160 # From Arthur David Olson, 2005-12-19
161 # We generate the files specified below to guard against old files with
162 # obsolete information being left in the time zone binary directory.
163 # We limit the list to names that have appeared in previous versions of
164 # this time zone package.
165 # We do these as separate Zones rather than as Links to avoid problems if
166 # a particular place changes whether it observes DST.
167 # We put these specifications here in the northamerica file both to
168 # increase the chances that they'll actually get compiled and to
169 # avoid the need to duplicate the US rules in another file.
170
171 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
172 Zone EST -5:00 - EST
173 Zone MST -7:00 - MST
174 Zone HST -10:00 - HST
175 Zone EST5EDT -5:00 US E%sT
176 Zone CST6CDT -6:00 US C%sT
177 Zone MST7MDT -7:00 US M%sT
178 Zone PST8PDT -8:00 US P%sT
179
180 # From Bob Devine (1988-01-28):
181 # ...Alaska (and Hawaii) had the timezone names changed in 1967.
182 # old new
183 # Pacific Standard Time(PST) -same-
184 # Yukon Standard Time(YST) -same-
185 # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
186 # Nome Standard Time (NT) Bering Standard Time (BST)
187 #
188 # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
189 # The YST zone now covers nearly all of the state, AHST just part
190 # of the Aleutian islands. No DST.
191
192 # From Paul Eggert (1995-12-19):
193 # The tables below use 'NST', not 'NT', for Nome Standard Time.
194 # I invented 'CAWT' for Central Alaska War Time.
195
196 # From U. S. Naval Observatory (1989-01-19):
197 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
198 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
199 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
200 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
201 # USA MOUNTAIN 7 H BEHIND UTC DENVER
202 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
203 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
204 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
205 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
206 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
207 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
208 # USA " 9 H BEHIND UTC APR 3 - OCT 30
209 # USA HAWAII 10 H BEHIND UTC
210 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
211
212 # From Arthur David Olson (1989-01-21):
213 # The above dates are for 1988.
214 # Note the "AKST" and "AKDT" abbreviations, the claim that there's
215 # no DST in Samoa, and the claim that there is DST in Alaska and the
216 # Aleutians.
217
218 # From Arthur David Olson (1988-02-13):
219 # Legal standard time zone names, from United States Code (1982 Edition and
220 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
221 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
222 # took effect), as explained in sections 263 and 261:
223 # (none)
224 # United States standard eastern time
225 # United States standard mountain time
226 # United States standard central time
227 # United States standard Pacific time
228 # (none)
229 # United States standard Alaska time
230 # (none)
231 # Next, names from 1967-04-01 until 1983-11-30 (the date for
232 # public law 98-181):
233 # Atlantic standard time
234 # eastern standard time
235 # central standard time
236 # mountain standard time
237 # Pacific standard time
238 # Yukon standard time
239 # Alaska-Hawaii standard time
240 # Bering standard time
241 # And after 1983-11-30:
242 # Atlantic standard time
243 # eastern standard time
244 # central standard time
245 # mountain standard time
246 # Pacific standard time
247 # Alaska standard time
248 # Hawaii-Aleutian standard time
249 # Samoa standard time
250 # The law doesn't give abbreviations.
251 #
252 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
253 # Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time"
254 # for time in Guam and the Northern Marianas. See the file "australasia".
255 #
256 # From Paul Eggert (2015-04-17):
257 # HST and HDT are standardized abbreviations for Hawaii-Aleutian
258 # standard and daylight times. See section 9.47 (p 234) of the
259 # U.S. Government Printing Office Style Manual (2008)
260 # http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
261
262 # From Arthur David Olson, 2005-08-09
263 # The following was signed into law on 2005-08-08.
264 #
265 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
266 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
267 # U.S.C. 260a(a)) is amended--
268 # (1) by striking "first Sunday of April" and inserting "second
269 # Sunday of March"; and
270 # (2) by striking "last Sunday of October" and inserting "first
271 # Sunday of November'.
272 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the
273 # date of enactment of this Act or March 1, 2007, whichever is later.
274 # (c) Report to Congress.--Not later than 9 months after the effective
275 # date stated in subsection (b), the Secretary shall report to Congress
276 # on the impact of this section on energy consumption in the United
277 # States.
278 # (d) Right to Revert.--Congress retains the right to revert the
279 # Daylight Saving Time back to the 2005 time schedules once the
280 # Department study is complete.
281
282 # US eastern time, represented by New York
283
284 # Connecticut, Delaware, District of Columbia, most of Florida,
285 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
286 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
287 # New Hampshire, New Jersey, New York, North Carolina, Ohio,
288 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
289 # Vermont, Virginia, West Virginia
290
291 # From Dave Cantor (2004-11-02):
292 # Early this summer I had the occasion to visit the Mount Washington
293 # Observatory weather station atop (of course!) Mount Washington [, NH]....
294 # One of the staff members said that the station was on Eastern Standard Time
295 # and didn't change their clocks for Daylight Saving ... so that their
296 # reports will always have times which are 5 hours behind UTC.
297
298 # From Paul Eggert (2005-08-26):
299 # According to today's Huntsville Times
300 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
301 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City
302 # in Russell County, Lanett in Chambers County and some towns in Lee County,
303 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
304 # Roberts, city administrator in Phenix City. as saying "We are in the Central
305 # time zone, but we do go by the Eastern time zone because so many people work
306 # in Columbus."
307
308 # From Paul Eggert (2014-09-06):
309 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
310 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
311 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the
312 # nearest second.
313
314 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
315 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
316 Rule NYC 1920 only - Oct lastSun 2:00 0 S
317 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
318 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
319 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
320 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
321 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
322 -5:00 US E%sT 1920
323 -5:00 NYC E%sT 1942
324 -5:00 US E%sT 1946
325 -5:00 NYC E%sT 1967
326 -5:00 US E%sT
327
328 # US central time, represented by Chicago
329
330 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
331 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
332 # Washington counties), Illinois, western Indiana
333 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
334 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
335 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
336 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
337 # western Tennessee, most of Texas, Wisconsin
338
339 # From Larry M. Smith (2006-04-26) re Wisconsin:
340 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
341 # is currently enforced at the 01:00 time of change. Because the local
342 # "bar time" in the state corresponds to 02:00, a number of citations
343 # are issued for the "sale of class 'B' alcohol after prohibited
344 # hours" within the deviated hour of this change every year....
345 #
346 # From Douglas R. Bomberg (2007-03-12):
347 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
348 # Statue 175 closer in synch with the US Congress' intent....
349 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
350
351 # From an email administrator of the City of Fort Pierre, SD (2015-12-21):
352 # Fort Pierre is technically located in the Mountain time zone as is
353 # the rest of Stanley County. Most of Stanley County and Fort Pierre
354 # uses the Central time zone due to doing most of their business in
355 # Pierre so it simplifies schedules. I have lived in Stanley County
356 # all my life and it has been that way since I can remember. (43 years!)
357 #
358 # From Paul Eggert (2015-12-25):
359 # Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
360
361 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
362 Rule Chicago 1920 only - Jun 13 2:00 1:00 D
363 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
364 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
365 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
366 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
367 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
368 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
369 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
370 -6:00 US C%sT 1920
371 -6:00 Chicago C%sT 1936 Mar 1 2:00
372 -5:00 - EST 1936 Nov 15 2:00
373 -6:00 Chicago C%sT 1942
374 -6:00 US C%sT 1946
375 -6:00 Chicago C%sT 1967
376 -6:00 US C%sT
377 # Oliver County, ND switched from mountain to central time on 1992-10-25.
378 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
379 -7:00 US M%sT 1992 Oct 25 2:00
380 -6:00 US C%sT
381 # Morton County, ND, switched from mountain to central time on
382 # 2003-10-26, except for the area around Mandan which was already central time.
383 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
384 # Officially this switch also included part of Sioux County, and
385 # Jones, Mellette, and Todd Counties in South Dakota;
386 # but in practice these other counties were already observing central time.
387 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
388 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
389 -7:00 US M%sT 2003 Oct 26 2:00
390 -6:00 US C%sT
391
392 # From Josh Findley (2011-01-21):
393 # ...it appears that Mercer County, North Dakota, changed from the
394 # mountain time zone to the central time zone at the last transition from
395 # daylight-saving to standard time (on Nov. 7, 2010):
396 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
397 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
398
399 # From Andy Lipscomb (2011-01-24):
400 # ...according to the Census Bureau, the largest city is Beulah (although
401 # it's commonly referred to as Beulah-Hazen, with Hazen being the next
402 # largest city in Mercer County). Google Maps places Beulah's city hall
403 # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
404 # of 6h47'07".
405
406 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53
407 -7:00 US M%sT 2010 Nov 7 2:00
408 -6:00 US C%sT
409
410 # US mountain time, represented by Denver
411 #
412 # Colorado, far western Kansas, Montana, western
413 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
414 # New Mexico, southwestern North Dakota,
415 # western South Dakota, far western Texas (El Paso County, Hudspeth County,
416 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
417 #
418 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
419 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
420 Rule Denver 1920 only - Oct lastSun 2:00 0 S
421 Rule Denver 1921 only - May 22 2:00 0 S
422 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
423 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
424 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
425 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
426 -7:00 US M%sT 1920
427 -7:00 Denver M%sT 1942
428 -7:00 US M%sT 1946
429 -7:00 Denver M%sT 1967
430 -7:00 US M%sT
431
432 # US Pacific time, represented by Los Angeles
433 #
434 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
435 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
436 # north of the Salmon River, and the towns of Burgdorf and Warren),
437 # Nevada (except West Wendover), Oregon (except the northern 3/4 of
438 # Malheur county), and Washington
439
440 # From Paul Eggert (2016-08-20):
441 # In early February 1948, in response to California's electricity shortage,
442 # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
443 # causing electric clocks to lose six minutes per day. (This did not change
444 # legal time, and is not part of the data here.) See:
445 # Ross SA. An energy crisis from the past: Northern California in 1948.
446 # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley,
447 # 1973-11. http://escholarship.org/uc/item/8x22k30c
448 #
449 # In another measure to save electricity, DST was instituted from 1948-03-14
450 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
451 # the fallback transition earlier. See pages 3-4 of:
452 # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf
453 #
454 # In response:
455 #
456 # Governor Warren received a torrent of objecting mail, and it is not too much
457 # to speculate that the objections to Daylight Saving Time were one important
458 # factor in the defeat of the Dewey-Warren Presidential ticket in California.
459 # -- Ross, p 25
460 #
461 # On December 8 the governor exercised the option, setting the date to January 1
462 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01).
463 #
464 # Despite the controversy, in 1949 California voters approved Proposition 12,
465 # which established DST from April's last Sunday at 01:00 until September's
466 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
467 # the fall-back date to October's last Sunday. See:
468 # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
469 # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
470 #
471 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
472 Rule CA 1948 only - Mar 14 2:01 1:00 D
473 Rule CA 1949 only - Jan 1 2:00 0 S
474 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
475 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
476 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
477 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
478 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
479 -8:00 US P%sT 1946
480 -8:00 CA P%sT 1967
481 -8:00 US P%sT
482
483 # Alaska
484 # AK%sT is the modern abbreviation for -9:00 per USNO.
485 #
486 # From Paul Eggert (2001-05-30):
487 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
488 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
489 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
490 # also a Friday. Include only the time zone part of this transition,
491 # ignoring the switch from Julian to Gregorian, since we can't represent
492 # the Julian calendar.
493 #
494 # As far as we know, none of the exact locations mentioned below were
495 # permanently inhabited in 1867 by anyone using either calendar.
496 # (Yakutat was colonized by the Russians in 1799, but the settlement
497 # was destroyed in 1805 by a Yakutat-kon war party.) However, there
498 # were nearby inhabitants in some cases and for our purposes perhaps
499 # it's best to simply use the official transition.
500
501 # From Paul Eggert (2014-07-18):
502 # One opinion of the early-1980s turmoil in Alaska over time zones and
503 # daylight saving time appeared as graffiti on a Juneau airport wall:
504 # "Welcome to Juneau. Please turn your watch back to the 19th century."
505 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
506 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
507 #
508 # Steve Ferguson (2011-01-31) referred to the following source:
509 # Norris F. Keeping time in Alaska: national directives, local response.
510 # Alaska History 2001;16(1-2).
511 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/
512
513 # From Arthur David Olson (2011-02-01):
514 # Here's database-relevant material from the 2001 "Alaska History" article:
515 #
516 # On September 20 [1979]...DOT...officials decreed that on April 27,
517 # 1980, Juneau and other nearby communities would move to Yukon Time.
518 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on
519 # Pacific Time.
520 #
521 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the
522 # Department's September 1979 decision. Juneau and other communities in
523 # northern Southeast reverted to Pacific Time on October 26.
524 #
525 # On October 28 [1983]...the Metlakatla Indian Community Council voted
526 # unanimously to keep the reservation on Pacific Time.
527 #
528 # According to DOT official Joanne Petrie, Indian reservations are not
529 # bound to follow time zones imposed by neighboring jurisdictions.
530 #
531 # (The last is consistent with how the database now handles the Navajo
532 # Nation.)
533
534 # From Arthur David Olson (2011-02-09):
535 # I just spoke by phone with a staff member at the Metlakatla Indian
536 # Community office (using contact information available at
537 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
538 # It's shortly after 1:00 here on the east coast of the United States;
539 # the staffer said it was shortly after 10:00 there. When I asked whether
540 # that meant they were on Pacific time, they said no - they were on their
541 # own time. I asked about daylight saving; they said it wasn't used. I
542 # did not inquire about practices in the past.
543
544 # From Arthur David Olson (2011-08-17):
545 # For lack of better information, assume that Metlakatla's
546 # abandonment of use of daylight saving resulted from the 1983 vote.
547
548 # From Steffen Thorsen (2015-11-09):
549 # It seems Metlakatla did go off PST on Sunday, November 1, changing
550 # their time to AKST and are going to follow Alaska's DST, switching
551 # between AKST and AKDT from now on....
552 # http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
553
554 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
555 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
556 -8:57:41 - LMT 1900 Aug 20 12:00
557 -8:00 - PST 1942
558 -8:00 US P%sT 1946
559 -8:00 - PST 1969
560 -8:00 US P%sT 1980 Apr 27 2:00
561 -9:00 US Y%sT 1980 Oct 26 2:00
562 -8:00 US P%sT 1983 Oct 30 2:00
563 -9:00 US Y%sT 1983 Nov 30
564 -9:00 US AK%sT
565 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18
566 -9:01:13 - LMT 1900 Aug 20 12:00
567 -8:00 - PST 1942
568 -8:00 US P%sT 1946
569 -8:00 - PST 1969
570 -8:00 US P%sT 1983 Oct 30 2:00
571 -9:00 US Y%sT 1983 Nov 30
572 -9:00 US AK%sT
573 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18
574 -8:46:18 - LMT 1900 Aug 20 12:00
575 -8:00 - PST 1942
576 -8:00 US P%sT 1946
577 -8:00 - PST 1969
578 -8:00 US P%sT 1983 Oct 30 2:00
579 -8:00 - PST 2015 Nov 1 2:00
580 -9:00 US AK%sT
581 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
582 -9:18:55 - LMT 1900 Aug 20 12:00
583 -9:00 - YST 1942
584 -9:00 US Y%sT 1946
585 -9:00 - YST 1969
586 -9:00 US Y%sT 1983 Nov 30
587 -9:00 US AK%sT
588 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
589 -9:59:36 - LMT 1900 Aug 20 12:00
590 -10:00 - CAT 1942
591 -10:00 US CAT/CAWT 1945 Aug 14 23:00u
592 -10:00 US CAT/CAPT 1946 # Peace
593 -10:00 - CAT 1967 Apr
594 -10:00 - AHST 1969
595 -10:00 US AH%sT 1983 Oct 30 2:00
596 -9:00 US Y%sT 1983 Nov 30
597 -9:00 US AK%sT
598 Zone America/Nome 12:58:21 - LMT 1867 Oct 18
599 -11:01:38 - LMT 1900 Aug 20 12:00
600 -11:00 - NST 1942
601 -11:00 US N%sT 1946
602 -11:00 - NST 1967 Apr
603 -11:00 - BST 1969
604 -11:00 US B%sT 1983 Oct 30 2:00
605 -9:00 US Y%sT 1983 Nov 30
606 -9:00 US AK%sT
607 Zone America/Adak 12:13:21 - LMT 1867 Oct 18
608 -11:46:38 - LMT 1900 Aug 20 12:00
609 -11:00 - NST 1942
610 -11:00 US N%sT 1946
611 -11:00 - NST 1967 Apr
612 -11:00 - BST 1969
613 -11:00 US B%sT 1983 Oct 30 2:00
614 -10:00 US AH%sT 1983 Nov 30
615 -10:00 US H%sT
616 # The following switches don't quite make our 1970 cutoff.
617 #
618 # Shanks writes that part of southwest Alaska (e.g. Aniak)
619 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
620 # and another part (e.g. Akiak) made the same switch five weeks later.
621 #
622 # From David Flater (2004-11-09):
623 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
624 # Historic Preservation Commission, provided this information, which
625 # suggests that Unalaska deviated from statutory time from early 1967
626 # possibly until 1983:
627 #
628 # Minutes of the Unalaska City Council Meeting, January 10, 1967:
629 # "Except for St. Paul and Akutan, Unalaska is the only important
630 # location not on Alaska Standard Time. The following resolution was
631 # made by William Robinson and seconded by Henry Swanson: Be it
632 # resolved that the City of Unalaska hereby goes to Alaska Standard
633 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
634 # January 14, Alaska Standard Time.) This resolution was passed with
635 # three votes for and one against."
636
637 # Hawaii
638
639 # From Arthur David Olson (2010-12-09):
640 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
641 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
642 # the article is available at
643 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
644 # and indicates that standard time was adopted effective noon, January
645 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
646 # saving for the period between the last Sunday of each April and the
647 # last Sunday of each September, but less than a month later repealed the
648 # act," (page 220), that year-round daylight saving time was in effect
649 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
650 # when clocks changed) and that clocks were changed by 30 minutes
651 # effective the second Sunday of June, 1947 (page 219, with no time of
652 # day given for when clocks changed). A footnote for the 1933 changes
653 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
654 # and Act 163 (approved 21 May 1933)."
655
656 # From Arthur David Olson (2011-01-19):
657 # The following is from "Laws of the Territory of Hawaii Passed by the
658 # Seventeenth Legislature: Regular Session 1933," available (as of
659 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act
660 # 90...At 2 o'clock ante meridian of the last Sunday in April of each
661 # year, the standard time of this Territory shall be advanced one
662 # hour...This Act shall take effect upon its approval. Approved this 26th
663 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
664 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
665 # hereby repealed...This Act shall take effect upon its approval, upon
666 # which date the standard time of this Territory shall be restored to
667 # that existing immediately prior to the taking effect of said Act 90.
668 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
669 # of the Territory of Hawaii."
670 #
671 # Note that 1933-05-21 was a Sunday.
672 # We're left to guess the time of day when Act 163 was approved; guess noon.
673
674 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
675 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00
676 -10:30 - HST 1933 Apr 30 2:00
677 -10:30 1:00 HDT 1933 May 21 12:00
678 -10:30 - HST 1942 Feb 9 2:00
679 -10:30 1:00 HDT 1945 Sep 30 2:00
680 -10:30 - HST 1947 Jun 8 2:00
681 -10:00 - HST
682 Link Pacific/Honolulu Pacific/Johnston
683
684 # Now we turn to US areas that have diverged from the consensus since 1970.
685
686 # Arizona mostly uses MST.
687
688 # From Paul Eggert (2002-10-20):
689 #
690 # The information in the rest of this paragraph is derived from the
691 # Daylight Saving Time web page
692 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
693 # maintained by the Arizona State Library, Archives and Public Records.
694 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
695 # time, but by federal law railroads, airlines, bus lines, military
696 # personnel, and some engaged in interstate commerce continued to
697 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
698 # Gazette says that was the date the law changed, and that 04-01 was
699 # the date the state's clocks would change. In 1945 the State of
700 # Arizona used standard time all year, again with exceptions only as
701 # mandated by federal law. Arizona observed DST in 1967, but Arizona
702 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
703 #
704 # Shanks says the 1944 experiment came to an end on 1944-03-17.
705 # Go with the Arizona State Library instead.
706
707 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
708 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42
709 -7:00 US M%sT 1944 Jan 1 0:01
710 -7:00 - MST 1944 Apr 1 0:01
711 -7:00 US M%sT 1944 Oct 1 0:01
712 -7:00 - MST 1967
713 -7:00 US M%sT 1968 Mar 21
714 -7:00 - MST
715 # From Arthur David Olson (1988-02-13):
716 # A writer from the Inter Tribal Council of Arizona, Inc.,
717 # notes in private correspondence dated 1987-12-28 that "Presently, only the
718 # Navajo Nation participates in the Daylight Saving Time policy, due to its
719 # large size and location in three states." (The "only" means that other
720 # tribal nations don't use DST.)
721 #
722 # From Paul Eggert (2013-08-26):
723 # See America/Denver for a zone appropriate for the Navajo Nation.
724
725 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
726 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
727 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
728 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
729 # Teton, Twin Falls, Valley, Washington counties, and the southern
730 # quarter of Idaho county) and eastern Oregon (most of Malheur County)
731 # switched four weeks late in 1974.
732 #
733 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
734 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
735 -8:00 US P%sT 1923 May 13 2:00
736 -7:00 US M%sT 1974
737 -7:00 - MST 1974 Feb 3 2:00
738 -7:00 US M%sT
739
740 # Indiana
741 #
742 # For a map of Indiana's time zone regions, see:
743 # http://en.wikipedia.org/wiki/Time_in_Indiana
744 #
745 # From Paul Eggert (2007-08-17):
746 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
747 # with the following exceptions:
748 #
749 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
750 # Vanderburgh, and Warrick counties have been like America/Chicago.
751 #
752 # - Dearborn and Ohio counties have been like America/New_York.
753 #
754 # - Clark, Floyd, and Harrison counties have been like
755 # America/Kentucky/Louisville.
756 #
757 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
758 # and Switzerland counties have their own time zone histories as noted below.
759 #
760 # Shanks partitioned Indiana into 345 regions, each with its own time history,
761 # and wrote "Even newspaper reports present contradictory information."
762 # Those Hoosiers! Such a flighty and changeable people!
763 # Fortunately, most of the complexity occurred before our cutoff date of 1970.
764 #
765 # Other than Indianapolis, the Indiana place names are so nondescript
766 # that they would be ambiguous if we left them at the 'America' level.
767 # So we reluctantly put them all in a subdirectory 'America/Indiana'.
768
769 # From Paul Eggert (2014-06-26):
770 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
771 # says "DOT is relocating the time zone boundary in Indiana to move Starke,
772 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
773 # Eastern Time Zone to the Central Time Zone.... The effective date of
774 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
775 # changeover date from standard time to Daylight Saving Time."
776 # Strictly speaking, this meant the affected counties changed their
777 # clocks twice that night, but this obviously was in error. The intent
778 # was that 01:59:59 EST be followed by 02:00:00 CDT.
779
780 # From Gwillim Law (2007-02-10):
781 # The Associated Press has been reporting that Pulaski County, Indiana is
782 # going to switch from Central to Eastern Time on March 11, 2007....
783 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
784
785 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
786 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
787 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
788 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
789 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
790 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
791 -6:00 US C%sT 1920
792 -6:00 Indianapolis C%sT 1942
793 -6:00 US C%sT 1946
794 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
795 -5:00 - EST 1957 Sep 29 2:00
796 -6:00 - CST 1958 Apr 27 2:00
797 -5:00 - EST 1969
798 -5:00 US E%sT 1971
799 -5:00 - EST 2006
800 -5:00 US E%sT
801 #
802 # Eastern Crawford County, Indiana, left its clocks alone in 1974,
803 # as well as from 1976 through 2005.
804 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
805 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
806 Rule Marengo 1951 only - Sep lastSun 2:00 0 S
807 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
808 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
809 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
810 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
811 -6:00 US C%sT 1951
812 -6:00 Marengo C%sT 1961 Apr 30 2:00
813 -5:00 - EST 1969
814 -5:00 US E%sT 1974 Jan 6 2:00
815 -6:00 1:00 CDT 1974 Oct 27 2:00
816 -5:00 US E%sT 1976
817 -5:00 - EST 2006
818 -5:00 US E%sT
819 #
820 # Daviess, Dubois, Knox, and Martin Counties, Indiana,
821 # switched from eastern to central time in April 2006, then switched back
822 # in November 2007.
823 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
824 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
825 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
826 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
827 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
828 Rule Vincennes 1955 only - May 1 0:00 1:00 D
829 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
830 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
831 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
832 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
833 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
834 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
835 -6:00 US C%sT 1946
836 -6:00 Vincennes C%sT 1964 Apr 26 2:00
837 -5:00 - EST 1969
838 -5:00 US E%sT 1971
839 -5:00 - EST 2006 Apr 2 2:00
840 -6:00 US C%sT 2007 Nov 4 2:00
841 -5:00 US E%sT
842 #
843 # Perry County, Indiana, switched from eastern to central time in April 2006.
844 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
845 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D
846 Rule Perry 1946 only - Sep lastSun 2:00 0 S
847 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D
848 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S
849 Rule Perry 1955 only - May 1 0:00 1:00 D
850 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
851 Rule Perry 1960 only - Oct lastSun 2:00 0 S
852 Rule Perry 1961 only - Sep lastSun 2:00 0 S
853 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S
854 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
855 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57
856 -6:00 US C%sT 1946
857 -6:00 Perry C%sT 1964 Apr 26 2:00
858 -5:00 - EST 1969
859 -5:00 US E%sT 1971
860 -5:00 - EST 2006 Apr 2 2:00
861 -6:00 US C%sT
862 #
863 # Pike County, Indiana moved from central to eastern time in 1977,
864 # then switched back in 2006, then switched back again in 2007.
865 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
866 Rule Pike 1955 only - May 1 0:00 1:00 D
867 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
868 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
869 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
870 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
871 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
872 -6:00 US C%sT 1955
873 -6:00 Pike C%sT 1965 Apr 25 2:00
874 -5:00 - EST 1966 Oct 30 2:00
875 -6:00 US C%sT 1977 Oct 30 2:00
876 -5:00 - EST 2006 Apr 2 2:00
877 -6:00 US C%sT 2007 Nov 4 2:00
878 -5:00 US E%sT
879 #
880 # Starke County, Indiana moved from central to eastern time in 1991,
881 # then switched back in 2006.
882 # From Arthur David Olson (1991-10-28):
883 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
884 # notes that Starke County switched from Central time to Eastern time as of
885 # 1991-10-27.
886 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
887 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
888 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
889 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
890 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
891 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
892 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
893 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
894 -6:00 US C%sT 1947
895 -6:00 Starke C%sT 1962 Apr 29 2:00
896 -5:00 - EST 1963 Oct 27 2:00
897 -6:00 US C%sT 1991 Oct 27 2:00
898 -5:00 - EST 2006 Apr 2 2:00
899 -6:00 US C%sT
900 #
901 # Pulaski County, Indiana, switched from eastern to central time in
902 # April 2006 and then switched back in March 2007.
903 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
904 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
905 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
906 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
907 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
908 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
909 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35
910 -6:00 US C%sT 1946
911 -6:00 Pulaski C%sT 1961 Apr 30 2:00
912 -5:00 - EST 1969
913 -5:00 US E%sT 1971
914 -5:00 - EST 2006 Apr 2 2:00
915 -6:00 US C%sT 2007 Mar 11 2:00
916 -5:00 US E%sT
917 #
918 # Switzerland County, Indiana, did not observe DST from 1973 through 2005.
919 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
920 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
921 -6:00 US C%sT 1954 Apr 25 2:00
922 -5:00 - EST 1969
923 -5:00 US E%sT 1973
924 -5:00 - EST 2006
925 -5:00 US E%sT
926
927 # Part of Kentucky left its clocks alone in 1974.
928 # This also includes Clark, Floyd, and Harrison counties in Indiana.
929 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
930 Rule Louisville 1921 only - May 1 2:00 1:00 D
931 Rule Louisville 1921 only - Sep 1 2:00 0 S
932 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
933 Rule Louisville 1941 only - Sep lastSun 2:00 0 S
934 Rule Louisville 1946 only - Jun 2 2:00 0 S
935 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
936 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
937 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
938 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
939 -6:00 US C%sT 1921
940 -6:00 Louisville C%sT 1942
941 -6:00 US C%sT 1946
942 -6:00 Louisville C%sT 1961 Jul 23 2:00
943 -5:00 - EST 1968
944 -5:00 US E%sT 1974 Jan 6 2:00
945 -6:00 1:00 CDT 1974 Oct 27 2:00
946 -5:00 US E%sT
947 #
948 # Wayne County, Kentucky
949 #
950 # From Lake Cumberland LIFE
951 # http://www.lake-cumberland.com/life/archive/news990129time.shtml
952 # (1999-01-29) via WKYM-101.7:
953 # Clinton County has joined Wayne County in asking the DoT to change from
954 # the Central to the Eastern time zone.... The Wayne County government made
955 # the same request in December. And while Russell County officials have not
956 # taken action, the majority of respondents to a poll conducted there in
957 # August indicated they would like to change to "fast time" also.
958 # The three Lake Cumberland counties are the farthest east of any U.S.
959 # location in the Central time zone.
960 #
961 # From Rich Wales (2000-08-29):
962 # After prolonged debate, and despite continuing deep differences of opinion,
963 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
964 # (-0500) time. They won't "fall back" this year. See Sara Shipley,
965 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
966 #
967 # From Paul Eggert (2001-07-16):
968 # The final rule was published in the
969 # Federal Register 65, 160 (2000-08-17), pp 50154-50158.
970 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22
971 #
972 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
973 -6:00 US C%sT 1946
974 -6:00 - CST 1968
975 -6:00 US C%sT 2000 Oct 29 2:00
976 -5:00 US E%sT
977
978
979 # From Rives McDow (2000-08-30):
980 # Here ... are all the changes in the US since 1985.
981 # Kearny County, KS (put all of county on central;
982 # previously split between MST and CST) ... 1990-10
983 # Starke County, IN (from CST to EST) ... 1991-10
984 # Oliver County, ND (from MST to CST) ... 1992-10
985 # West Wendover, NV (from PST TO MST) ... 1999-10
986 # Wayne County, KY (from CST to EST) ... 2000-10
987 #
988 # From Paul Eggert (2001-07-17):
989 # We don't know where the line used to be within Kearny County, KS,
990 # so omit that change for now.
991 # See America/Indiana/Knox for the Starke County, IN change.
992 # See America/North_Dakota/Center for the Oliver County, ND change.
993 # West Wendover, NV officially switched from Pacific to mountain time on
994 # 1999-10-31. See the
995 # Federal Register 64, 203 (1999-10-21), pp 56705-56707.
996 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15
997 # However, the Federal Register says that West Wendover already operated
998 # on mountain time, and the rule merely made this official;
999 # hence a separate tz entry is not needed.
1000
1001 # Michigan
1002 #
1003 # From Bob Devine (1988-01-28):
1004 # Michigan didn't observe DST from 1968 to 1973.
1005 #
1006 # From Paul Eggert (1999-03-31):
1007 # Shanks writes that Michigan started using standard time on 1885-09-18,
1008 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
1009 # that Detroit kept
1010 #
1011 # local time until 1900 when the City Council decreed that clocks should
1012 # be put back twenty-eight minutes to Central Standard Time. Half the
1013 # city obeyed, half refused. After considerable debate, the decision
1014 # was rescinded and the city reverted to Sun time. A derisive offer to
1015 # erect a sundial in front of the city hall was referred to the
1016 # Committee on Sewers. Then, in 1905, Central time was adopted
1017 # by city vote.
1018 #
1019 # This story is too entertaining to be false, so go with Howse over Shanks.
1020 #
1021 # From Paul Eggert (2001-03-06):
1022 # Garland (1927) writes "Cleveland and Detroit advanced their clocks
1023 # one hour in 1914." This change is not in Shanks. We have no more
1024 # info, so omit this for now.
1025 #
1026 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1027 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1028 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
1029 Rule Detroit 1948 only - Sep lastSun 2:00 0 S
1030 Rule Detroit 1967 only - Jun 14 2:00 1:00 D
1031 Rule Detroit 1967 only - Oct lastSun 2:00 0 S
1032 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1033 Zone America/Detroit -5:32:11 - LMT 1905
1034 -6:00 - CST 1915 May 15 2:00
1035 -5:00 - EST 1942
1036 -5:00 US E%sT 1946
1037 -5:00 Detroit E%sT 1973
1038 -5:00 US E%sT 1975
1039 -5:00 - EST 1975 Apr 27 2:00
1040 -5:00 US E%sT
1041 #
1042 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
1043 # switched from EST to CST/CDT in 1973.
1044 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1045 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
1046 Rule Menominee 1946 only - Sep lastSun 2:00 0 S
1047 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
1048 Rule Menominee 1966 only - Oct lastSun 2:00 0 S
1049 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1050 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
1051 -6:00 US C%sT 1946
1052 -6:00 Menominee C%sT 1969 Apr 27 2:00
1053 -5:00 - EST 1973 Apr 29 2:00
1054 -6:00 US C%sT
1055
1056 # Navassa
1057 # administered by the US Fish and Wildlife Service
1058 # claimed by US under the provisions of the 1856 Guano Islands Act
1059 # also claimed by Haiti
1060 # occupied 1857/1900 by the Navassa Phosphate Co
1061 # US lighthouse 1917/1996-09
1062 # currently uninhabited
1063 # see Mark Fineman, "An Isle Rich in Guano and Discord",
1064 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1065 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
1066
1067 ################################################################################
1068
1069
1070 # From Paul Eggert (2014-10-31):
1071 #
1072 # Unless otherwise specified, the source for data through 1990 is:
1073 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
1074 # San Diego: ACS Publications, Inc. (2003).
1075 # Unfortunately this book contains many errors and cites no sources.
1076 #
1077 # Gwillim Law writes that a good source
1078 # for recent time zone data is the International Air Transport
1079 # Association's Standard Schedules Information Manual (IATA SSIM),
1080 # published semiannually. Law sent in several helpful summaries
1081 # of the IATA's data after 1990. Except where otherwise noted,
1082 # IATA SSIM is the source for entries after 1990.
1083 #
1084 # Other sources occasionally used include:
1085 #
1086 # Edward W. Whitman, World Time Differences,
1087 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1088 # which I found in the UCLA library.
1089 #
1090 # William Willett, The Waste of Daylight, 19th edition
1091 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1092 # [PDF] (1914-03)
1093 #
1094 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1095 # <http://www.jstor.org/stable/1774359>.
1096 #
1097 # See the 'europe' file for Greenland.
1098
1099 # Canada
1100
1101 # From Alain LaBonté (1994-11-14):
1102 # I post here the time zone abbreviations standardized in Canada
1103 # for both English and French in the CAN/CSA-Z234.4-89 standard....
1104 #
1105 # UTC Standard time Daylight saving time
1106 # offset French English French English
1107 # -2:30 - - HAT NDT
1108 # -3 - - HAA ADT
1109 # -3:30 HNT NST - -
1110 # -4 HNA AST HAE EDT
1111 # -5 HNE EST HAC CDT
1112 # -6 HNC CST HAR MDT
1113 # -7 HNR MST HAP PDT
1114 # -8 HNP PST HAY YDT
1115 # -9 HNY YST - -
1116 #
1117 # HN: Heure Normale ST: Standard Time
1118 # HA: Heure Avancée DT: Daylight saving Time
1119 #
1120 # A: de l'Atlantique Atlantic
1121 # C: du Centre Central
1122 # E: de l'Est Eastern
1123 # M: Mountain
1124 # N: Newfoundland
1125 # P: du Pacifique Pacific
1126 # R: des Rocheuses
1127 # T: de Terre-Neuve
1128 # Y: du Yukon Yukon
1129 #
1130 # From Paul Eggert (1994-11-22):
1131 # Alas, this sort of thing must be handled by localization software.
1132
1133 # Unless otherwise specified, the data entries for Canada are all from Shanks
1134 # & Pottenger.
1135
1136 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1137 # 2007-03-01):
1138 # The British Columbia government announced yesterday that it will
1139 # adjust daylight savings next year to align with changes in the
1140 # U.S. and the rest of Canada....
1141 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
1142 # ...
1143 # Nova Scotia
1144 # Daylight saving time will be extended by four weeks starting in 2007....
1145 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
1146 #
1147 # [For New Brunswick] the new legislation dictates that the time change is to
1148 # be done at 02:00 instead of 00:01.
1149 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1150 # ...
1151 # Manitoba has traditionally changed the clock every fall at 03:00.
1152 # As of 2006, the transition is to take place one hour earlier at 02:00.
1153 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1154 # ...
1155 # [Alberta, Ontario, Quebec] will follow US rules.
1156 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
1157 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1158 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1159 # ...
1160 # P.E.I. will follow US rules....
1161 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1162 # ...
1163 # Province of Newfoundland and Labrador....
1164 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1165 # ...
1166 # Yukon
1167 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1168 # ...
1169 # N.W.T. will follow US rules. Whoever maintains the government web site
1170 # does not seem to believe in bookmarks. To see the news release, click the
1171 # following link and search for "Daylight Savings Time Change". Press the
1172 # "Daylight Savings Time Change" link; it will fire off a popup using
1173 # JavaScript.
1174 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1175 # ...
1176 # Nunavut
1177 # An amendment to the Interpretation Act was registered on February 19/2007....
1178 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1179
1180 # From Paul Eggert (2014-10-18):
1181 # H. David Matthews and Mary Vincent's map
1182 # "It's about TIME", _Canadian Geographic_ (September-October 1998)
1183 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp
1184 # contains detailed boundaries for regions observing nonstandard
1185 # time and daylight saving time arrangements in Canada circa 1998.
1186 #
1187 # National Research Council Canada maintains info about time zones and DST.
1188 # http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1189 # http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1190 # Its unofficial information is often taken from Matthews and Vincent.
1191
1192 # From Paul Eggert (2006-06-27):
1193 # For now, assume all of DST-observing Canada will fall into line with the
1194 # new US DST rules,
1195
1196 # From Chris Walton (2011-12-01)
1197 # In the first of Tammy Hardwick's articles
1198 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1199 # she quotes the Friday November 1/1918 edition of the Creston Review.
1200 # The quote includes these two statements:
1201 # 'Sunday the CPR went back to the old system of time...'
1202 # '... The daylight saving scheme was dropped all over Canada at the same time,'
1203 # These statements refer to a transition from daylight time to standard time
1204 # that occurred nationally on Sunday October 27/1918. This transition was
1205 # also documented in the Saturday October 26/1918 edition of the Toronto Star.
1206
1207 # In light of that evidence, we alter the date from the earlier believed
1208 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1209 # than Thursday) in all Canadian rulesets.
1210
1211 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1212 Rule Canada 1918 only - Apr 14 2:00 1:00 D
1213 Rule Canada 1918 only - Oct 27 2:00 0 S
1214 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
1215 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
1216 Rule Canada 1945 only - Sep 30 2:00 0 S
1217 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
1218 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1219 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1220 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1221 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
1222
1223
1224 # Newfoundland and Labrador
1225
1226 # From Paul Eggert (2000-10-02):
1227 # Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1228 # but the only part of Labrador that follows the rules is the
1229 # southeast corner, including Port Hope Simpson and Mary's Harbour,
1230 # but excluding, say, Black Tickle.
1231
1232 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1233 Rule StJohns 1917 only - Apr 8 2:00 1:00 D
1234 Rule StJohns 1917 only - Sep 17 2:00 0 S
1235 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1236 Rule StJohns 1919 only - May 5 23:00 1:00 D
1237 Rule StJohns 1919 only - Aug 12 23:00 0 S
1238 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1239 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
1240 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
1241 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1242 # Pottenger.
1243 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
1244 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
1245 # Whitman gives the following transitions:
1246 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1247 # but go with Shanks & Pottenger and assume they used Canadian rules.
1248 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1249 # Apr 30 - Sep 24; go with Shanks & Pottenger.
1250 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
1251 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
1252 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
1253 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
1254 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
1255 # From Paul Eggert (2000-10-02):
1256 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1257 # at 00:01 local time. For now, assume it started in 1987.
1258
1259 # From Michael Pelley (2011-09-12):
1260 # We received today, Monday, September 12, 2011, notification that the
1261 # changes to the Newfoundland Standard Time Act have been proclaimed.
1262 # The change in the Act stipulates that the change from Daylight Savings
1263 # Time to Standard Time and from Standard Time to Daylight Savings Time
1264 # now occurs at 2:00AM.
1265 # ...
1266 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1267 # ...
1268 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery
1269 # Office of the Chief Information Officer
1270 # Executive Council
1271 # Government of Newfoundland & Labrador
1272
1273 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
1274 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
1275 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
1276 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1277 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D
1278 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S
1279 #
1280 # St John's has an apostrophe, but Posix file names can't have apostrophes.
1281 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1282 Zone America/St_Johns -3:30:52 - LMT 1884
1283 -3:30:52 StJohns N%sT 1918
1284 -3:30:52 Canada N%sT 1919
1285 -3:30:52 StJohns N%sT 1935 Mar 30
1286 -3:30 StJohns N%sT 1942 May 11
1287 -3:30 Canada N%sT 1946
1288 -3:30 StJohns N%sT 2011 Nov
1289 -3:30 Canada N%sT
1290
1291 # most of east Labrador
1292
1293 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1294 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1295 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1296 -3:30:52 - NST 1918
1297 -3:30:52 Canada N%sT 1919
1298 -3:30:52 - NST 1935 Mar 30
1299 -3:30 - NST 1936
1300 -3:30 StJohns N%sT 1942 May 11
1301 -3:30 Canada N%sT 1946
1302 -3:30 StJohns N%sT 1966 Mar 15 2:00
1303 -4:00 StJohns A%sT 2011 Nov
1304 -4:00 Canada A%sT
1305
1306
1307 # west Labrador, Nova Scotia, Prince Edward I
1308
1309 # From Brian Inglis (2015-07-20):
1310 # From the historical weather station records available at:
1311 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1312 # Sydney shares the same time history as Glace Bay, so was
1313 # likely to be the same across the island....
1314 # Sydney, as the capital and most populous location, or Cape Breton, would
1315 # have been better names for the zone had we known this in 1996.
1316
1317 # From Paul Eggert (2015-07-20):
1318 # Shanks & Pottenger write that since 1970 most of this region has been like
1319 # Halifax. Many locales did not observe peacetime DST until 1972;
1320 # the Cape Breton area, represented by Glace Bay, is the largest we know of
1321 # (Glace Bay was perhaps not the best name choice but no point changing now).
1322 # Shanks & Pottenger also write that Liverpool, NS was the only town
1323 # in Canada to observe DST in 1971 but not 1970; for now we'll assume
1324 # this is a typo.
1325
1326 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1327 Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1328 Rule Halifax 1916 only - Oct 1 0:00 0 S
1329 Rule Halifax 1920 only - May 9 0:00 1:00 D
1330 Rule Halifax 1920 only - Aug 29 0:00 0 S
1331 Rule Halifax 1921 only - May 6 0:00 1:00 D
1332 Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1333 Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1334 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1335 Rule Halifax 1923 only - Sep 4 0:00 0 S
1336 Rule Halifax 1924 only - Sep 15 0:00 0 S
1337 Rule Halifax 1925 only - Sep 28 0:00 0 S
1338 Rule Halifax 1926 only - May 16 0:00 1:00 D
1339 Rule Halifax 1926 only - Sep 13 0:00 0 S
1340 Rule Halifax 1927 only - May 1 0:00 1:00 D
1341 Rule Halifax 1927 only - Sep 26 0:00 0 S
1342 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
1343 Rule Halifax 1928 only - Sep 9 0:00 0 S
1344 Rule Halifax 1929 only - Sep 3 0:00 0 S
1345 Rule Halifax 1930 only - Sep 15 0:00 0 S
1346 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
1347 Rule Halifax 1932 only - May 1 0:00 1:00 D
1348 Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1349 Rule Halifax 1933 only - Oct 2 0:00 0 S
1350 Rule Halifax 1934 only - May 20 0:00 1:00 D
1351 Rule Halifax 1934 only - Sep 16 0:00 0 S
1352 Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1353 Rule Halifax 1935 only - Sep 30 0:00 0 S
1354 Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1355 Rule Halifax 1936 only - Sep 14 0:00 0 S
1356 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1357 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1358 Rule Halifax 1939 only - May 28 0:00 1:00 D
1359 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1360 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1361 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1362 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1363 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1364 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1365 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1366 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1367 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
1368 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1369 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
1370 -4:00 Halifax A%sT 1918
1371 -4:00 Canada A%sT 1919
1372 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1373 -4:00 Canada A%sT 1946
1374 -4:00 Halifax A%sT 1974
1375 -4:00 Canada A%sT
1376 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1377 -4:00 Canada A%sT 1953
1378 -4:00 Halifax A%sT 1954
1379 -4:00 - AST 1972
1380 -4:00 Halifax A%sT 1974
1381 -4:00 Canada A%sT
1382
1383 # New Brunswick
1384
1385 # From Paul Eggert (2007-01-31):
1386 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1387 # says they changed at 00:01 through 2006, and
1388 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1389 # clear that this was the case since at least 1993.
1390 # For now, assume it started in 1993.
1391
1392 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1393 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1394 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1395 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1396 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1397 Rule Moncton 1939 only - May 27 1:00 1:00 D
1398 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1399 Rule Moncton 1940 only - May 19 1:00 1:00 D
1400 Rule Moncton 1941 only - May 4 1:00 1:00 D
1401 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1402 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1403 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1404 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1405 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1406 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1407 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1408 -5:00 - EST 1902 Jun 15
1409 -4:00 Canada A%sT 1933
1410 -4:00 Moncton A%sT 1942
1411 -4:00 Canada A%sT 1946
1412 -4:00 Moncton A%sT 1973
1413 -4:00 Canada A%sT 1993
1414 -4:00 Moncton A%sT 2007
1415 -4:00 Canada A%sT
1416
1417 # Quebec
1418
1419 # From Paul Eggert (2015-03-24):
1420 # See America/Toronto for most of Quebec, including Montreal.
1421 #
1422 # Matthews and Vincent (1998) also write that Quebec east of the -63
1423 # meridian is supposed to observe AST, but residents as far east as
1424 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1425 # The Quebec department of justice writes in
1426 # "The situation in Minganie and Basse-Côte-Nord"
1427 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1428 # that the coastal strip from just east of Natashquan to Blanc-Sablon
1429 # observes Atlantic standard time all year round.
1430 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1431 # says this common practice was codified into law as of 2007.
1432 # For lack of better info, guess this practice began around 1970, contra to
1433 # Shanks & Pottenger who have this region observing AST/ADT.
1434
1435 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1436 Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1437 -4:00 Canada A%sT 1970
1438 -4:00 - AST
1439
1440 # Ontario
1441
1442 # From Paul Eggert (2006-07-09):
1443 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1444 # Toronto.
1445 # Thunder Bay skipped DST in 1973.
1446 # Many smaller locales did not observe peacetime DST until 1974;
1447 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1448 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1449
1450 # From Mark Brader (2003-07-26):
1451 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1452 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1453 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1454 # have already done so. In Orillia DST was to run until Saturday,
1455 # 1912-08-31 (no time mentioned), but it was met with considerable
1456 # hostility from certain segments of the public, and was revoked after
1457 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1458 # presumably that should be -07-06. (1912-06-19, -07-12; also letters
1459 # earlier in June).
1460 #
1461 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1462
1463 # From Paul Eggert (1997-10-17):
1464 # Mark Brader writes that an article in the 1997-10-14 Toronto Star
1465 # says that Atikokan, Ontario currently does not observe DST,
1466 # but will vote on 11-10 whether to use EST/EDT.
1467 # He also writes that the Ontario Time Act (1990, Chapter T.9)
1468 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html
1469 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1470 # Officially Atikokan is therefore on CST/CDT, and most likely this report
1471 # concerns a non-official time observed as a matter of local practice.
1472 #
1473 # From Paul Eggert (2000-10-02):
1474 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1475 # New Osnaburgh observe CST all year, that Big Trout Lake observes
1476 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1477 # violation of the official Ontario rules.
1478 #
1479 # From Paul Eggert (2006-07-09):
1480 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1481 # 2005-07-21 Chronicle-Journal, which said:
1482 #
1483 # The clocks in Atikokan stay set on standard time year-round.
1484 # This means they spend about half the time on central time and
1485 # the other half on eastern time.
1486 #
1487 # For the most part, the system works, Mayor Dennis Brown said.
1488 #
1489 # "The majority of businesses in Atikokan deal more with Eastern
1490 # Canada, but there are some that deal with Western Canada," he
1491 # said. "I don't see any changes happening here."
1492 #
1493 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1494 # [New Osnaburgh] follow the same practice."
1495
1496 # From Garry McKinnon (2006-07-14) via Chris Walton:
1497 # I chatted with a member of my board who has an outstanding memory
1498 # and a long history in Atikokan (and in the telecom industry) and he
1499 # can say for certain that Atikokan has been practicing the current
1500 # time keeping since 1952, at least.
1501
1502 # From Paul Eggert (2006-07-17):
1503 # Shanks & Pottenger say that Atikokan has agreed with Rainy River
1504 # ever since standard time was introduced, but the information from
1505 # McKinnon sounds more authoritative. For now, assume that Atikokan
1506 # switched to EST immediately after WWII era daylight saving time
1507 # ended. This matches the old (less-populous) America/Coral_Harbour
1508 # entry since our cutoff date of 1970, so we can move
1509 # America/Coral_Harbour to the 'backward' file.
1510
1511 # From Mark Brader (2010-03-06):
1512 #
1513 # Currently the database has:
1514 #
1515 # # Ontario
1516 #
1517 # # From Paul Eggert (2006-07-09):
1518 # # Shanks & Pottenger write that since 1970 most of Ontario has been like
1519 # # Toronto.
1520 # # Thunder Bay skipped DST in 1973.
1521 # # Many smaller locales did not observe peacetime DST until 1974;
1522 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1523 #
1524 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1525 # right corner of page 1, it says that Toronto will return to standard
1526 # time at 2 am Sunday morning (which agrees with the database), and that:
1527 #
1528 # The one-hour setback will go into effect throughout most of Ontario,
1529 # except in areas like Windsor which remains on standard time all year.
1530 #
1531 # Windsor is, of course, a lot larger than Nipigon.
1532 #
1533 # I only came across this incidentally. I don't know if Windsor began
1534 # observing DST when Detroit did, or in 1974, or on some other date.
1535 #
1536 # By the way, the article continues by noting that:
1537 #
1538 # Some cities in the United States have pushed the deadline back
1539 # three weeks and will change over from daylight saving in October.
1540
1541 # From Arthur David Olson (2010-07-17):
1542 #
1543 # "Standard Time and Time Zones in Canada" appeared in
1544 # The Journal of The Royal Astronomical Society of Canada,
1545 # volume 26, number 2 (February 1932) and, as of 2010-07-17,
1546 # was available at
1547 # http://adsabs.harvard.edu/full/1932JRASC..26...49S
1548 #
1549 # It includes the text below (starting on page 57):
1550 #
1551 # A list of the places in Canada using daylight saving time would
1552 # require yearly revision. From information kindly furnished by
1553 # the provincial governments and by the postmasters in many cities
1554 # and towns, it is found that the following places used daylight sav-
1555 # ing in 1930. The information for the province of Quebec is definite,
1556 # for the other provinces only approximate:
1557 #
1558 # Province Daylight saving time used
1559 # Prince Edward Island Not used.
1560 # Nova Scotia In Halifax only.
1561 # New Brunswick In St. John only.
1562 # Quebec In the following places:
1563 # Montreal Lachine
1564 # Quebec Mont-Royal
1565 # Lévis Iberville
1566 # St. Lambert Cap de la Madelèine
1567 # Verdun Loretteville
1568 # Westmount Richmond
1569 # Outremont St. Jérôme
1570 # Longueuil Greenfield Park
1571 # Arvida Waterloo
1572 # Chambly-Canton Beaulieu
1573 # Melbourne La Tuque
1574 # St. Théophile Buckingham
1575 # Ontario Used generally in the cities and towns along
1576 # the southerly part of the province. Not
1577 # used in the northwesterly part.
1578 # Manitoba Not used.
1579 # Saskatchewan In Regina only.
1580 # Alberta Not used.
1581 # British Columbia Not used.
1582 #
1583 # With some exceptions, the use of daylight saving may be said to be limited
1584 # to those cities and towns lying between Quebec city and Windsor, Ont.
1585
1586 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1587 Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1588 Rule Toronto 1919 only - Oct 26 0:00 0 S
1589 Rule Toronto 1920 only - May 2 2:00 1:00 D
1590 Rule Toronto 1920 only - Sep 26 0:00 0 S
1591 Rule Toronto 1921 only - May 15 2:00 1:00 D
1592 Rule Toronto 1921 only - Sep 15 2:00 0 S
1593 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
1594 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1595 # was meant.
1596 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1597 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1598 # The 1927-to-1939 rules can be expressed more simply as
1599 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1600 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1601 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1602 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1603 # The rules below avoid use of Sun>=25
1604 # (which pre-2004 versions of zic cannot handle).
1605 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S
1606 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D
1607 Rule Toronto 1932 only - May 1 2:00 1:00 D
1608 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D
1609 Rule Toronto 1933 only - Oct 1 2:00 0 S
1610 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S
1611 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
1612 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
1613 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
1614 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S
1615 Rule Toronto 1949 only - Nov lastSun 0:00 0 S
1616 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
1617 Rule Toronto 1950 only - Nov lastSun 2:00 0 S
1618 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
1619 # Shanks & Pottenger say Toronto ended DST a week early in 1971,
1620 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1621 # is wrong, and that he had confirmed it by checking the 1971-10-30
1622 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1623 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1624
1625 # From Paul Eggert (2003-07-27):
1626 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1627 # Port Arthur, Ontario, the principle of the Bill has been in
1628 # operation for the past three years, and in the City of Moose Jaw,
1629 # Saskatchewan, for one year."
1630
1631 # From David Bryan via Tory Tronrud, Director/Curator,
1632 # Thunder Bay Museum (2003-11-12):
1633 # There is some suggestion, however, that, by-law or not, daylight
1634 # savings time was being practiced in Fort William and Port Arthur
1635 # before 1909.... [I]n 1910, the line between the Eastern and Central
1636 # Time Zones was permanently moved about two hundred miles west to
1637 # include the Thunder Bay area.... When Canada adopted daylight
1638 # savings time in 1916, Fort William and Port Arthur, having done so
1639 # already, did not change their clocks.... During the Second World
1640 # War,... [t]he cities agreed to implement DST during the summer
1641 # months for the remainder of the war years.
1642
1643 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1644 Zone America/Toronto -5:17:32 - LMT 1895
1645 -5:00 Canada E%sT 1919
1646 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1647 -5:00 Canada E%sT 1946
1648 -5:00 Toronto E%sT 1974
1649 -5:00 Canada E%sT
1650 Zone America/Thunder_Bay -5:57:00 - LMT 1895
1651 -6:00 - CST 1910
1652 -5:00 - EST 1942
1653 -5:00 Canada E%sT 1970
1654 -5:00 Toronto E%sT 1973
1655 -5:00 - EST 1974
1656 -5:00 Canada E%sT
1657 Zone America/Nipigon -5:53:04 - LMT 1895
1658 -5:00 Canada E%sT 1940 Sep 29
1659 -5:00 1:00 EDT 1942 Feb 9 2:00s
1660 -5:00 Canada E%sT
1661 Zone America/Rainy_River -6:18:16 - LMT 1895
1662 -6:00 Canada C%sT 1940 Sep 29
1663 -6:00 1:00 CDT 1942 Feb 9 2:00s
1664 -6:00 Canada C%sT
1665 Zone America/Atikokan -6:06:28 - LMT 1895
1666 -6:00 Canada C%sT 1940 Sep 29
1667 -6:00 1:00 CDT 1942 Feb 9 2:00s
1668 -6:00 Canada C%sT 1945 Sep 30 2:00
1669 -5:00 - EST
1670
1671
1672 # Manitoba
1673
1674 # From Rob Douglas (2006-04-06):
1675 # the old Manitoba Time Act - as amended by Bill 2, assented to
1676 # March 27, 1987 ... said ...
1677 # "between two o'clock Central Standard Time in the morning of
1678 # the first Sunday of April of each year and two o'clock Central
1679 # Standard Time in the morning of the last Sunday of October next
1680 # following, one hour in advance of Central Standard Time."...
1681 # I believe that the English legislation [of the old time act] had
1682 # been assented to (March 22, 1967)....
1683 # Also, as far as I can tell, there was no order-in-council varying
1684 # the time of Daylight Saving Time for 2005 and so the provisions of
1685 # the 1987 version would apply - the changeover was at 2:00 Central
1686 # Standard Time (i.e. not until 3:00 Central Daylight Time).
1687
1688 # From Paul Eggert (2006-04-10):
1689 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1690 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume
1691 # it was also 02:00s in 1966.
1692
1693 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1694 Rule Winn 1916 only - Apr 23 0:00 1:00 D
1695 Rule Winn 1916 only - Sep 17 0:00 0 S
1696 Rule Winn 1918 only - Apr 14 2:00 1:00 D
1697 Rule Winn 1918 only - Oct 27 2:00 0 S
1698 Rule Winn 1937 only - May 16 2:00 1:00 D
1699 Rule Winn 1937 only - Sep 26 2:00 0 S
1700 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1701 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
1702 Rule Winn 1945 only - Sep lastSun 2:00 0 S
1703 Rule Winn 1946 only - May 12 2:00 1:00 D
1704 Rule Winn 1946 only - Oct 13 2:00 0 S
1705 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1706 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1707 Rule Winn 1950 only - May 1 2:00 1:00 D
1708 Rule Winn 1950 only - Sep 30 2:00 0 S
1709 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1710 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1711 Rule Winn 1959 only - Oct lastSun 2:00 0 S
1712 Rule Winn 1960 only - Sep lastSun 2:00 0 S
1713 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1714 Rule Winn 1963 only - Sep 22 2:00 0 S
1715 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1716 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1717 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
1718 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1719 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
1720 -6:00 Winn C%sT 2006
1721 -6:00 Canada C%sT
1722
1723
1724 # Saskatchewan
1725
1726 # From Mark Brader (2003-07-26):
1727 # The first actual adoption of DST in Canada was at the municipal
1728 # level. As the [Toronto] Star put it (1912-06-07), "While people
1729 # elsewhere have long been talking of legislation to save daylight,
1730 # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1731 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1732 # presumably late evening, as below), and would run until "the end of
1733 # the summer". The discrepancy between municipal time and railroad
1734 # time was noted.
1735
1736 # From Paul Eggert (2003-07-27):
1737 # Willett (1914-03) notes that DST "has been in operation ... in the
1738 # City of Moose Jaw, Saskatchewan, for one year."
1739
1740 # From Paul Eggert (2006-03-22):
1741 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1742 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1743 # Other western towns (e.g. Lloydminster) are like Edmonton.
1744 # Matthews and Vincent (1998) write that Denare Beach and Creighton
1745 # are like Winnipeg, in violation of Saskatchewan law.
1746
1747 # From W. Jones (1992-11-06):
1748 # The. . .below is based on information I got from our law library, the
1749 # provincial archives, and the provincial Community Services department.
1750 # A precise history would require digging through newspaper archives, and
1751 # since you didn't say what you wanted, I didn't bother.
1752 #
1753 # Saskatchewan is split by a time zone meridian (105W) and over the years
1754 # the boundary became pretty ragged as communities near it reevaluated
1755 # their affiliations in one direction or the other. In 1965 a provincial
1756 # referendum favoured legislating common time practices.
1757 #
1758 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1759 # Saskatchewan 1978) was proclaimed, and established that the eastern
1760 # part of Saskatchewan would use CST year round, that districts in
1761 # northwest Saskatchewan would by default follow CST but could opt to
1762 # follow Mountain Time rules (thus 1 hour difference in the winter and
1763 # zero in the summer), and that districts in southwest Saskatchewan would
1764 # by default follow MT but could opt to follow CST.
1765 #
1766 # It took a few years for the dust to settle (I know one story of a town
1767 # on one time zone having its school in another, such that a mom had to
1768 # serve her family lunch in two shifts), but presently it seems that only
1769 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1770 # rules any more; all other districts appear to have used CST year round
1771 # since sometime in the 1960s.
1772
1773 # From Chris Walton (2006-06-26):
1774 # The Saskatchewan time act which was last updated in 1996 is about 30 pages
1775 # long and rather painful to read.
1776 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1777
1778 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1779 Rule Regina 1918 only - Apr 14 2:00 1:00 D
1780 Rule Regina 1918 only - Oct 27 2:00 0 S
1781 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
1782 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1783 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1784 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1785 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1786 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
1787 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1788 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
1789 Rule Regina 1945 only - Sep lastSun 2:00 0 S
1790 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1791 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
1792 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1793 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1794 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
1795 Rule Regina 1959 only - Oct lastSun 2:00 0 S
1796 #
1797 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1798 Rule Swift 1957 only - Oct lastSun 2:00 0 S
1799 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1800 Rule Swift 1959 only - Oct lastSun 2:00 0 S
1801 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1802 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1803 Zone America/Regina -6:58:36 - LMT 1905 Sep
1804 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1805 -6:00 - CST
1806 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1807 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1808 -7:00 Regina M%sT 1950
1809 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1810 -6:00 - CST
1811
1812
1813 # Alberta
1814
1815 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1816 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1817 Rule Edm 1918 only - Oct 27 2:00 0 S
1818 Rule Edm 1919 only - May 27 2:00 0 S
1819 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1820 Rule Edm 1920 only - Oct lastSun 2:00 0 S
1821 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1822 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1823 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
1824 Rule Edm 1945 only - Sep lastSun 2:00 0 S
1825 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1826 Rule Edm 1947 only - Sep lastSun 2:00 0 S
1827 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1828 Rule Edm 1967 only - Oct lastSun 2:00 0 S
1829 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1830 Rule Edm 1969 only - Oct lastSun 2:00 0 S
1831 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1832 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
1833 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1834 Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1835 -7:00 Edm M%sT 1987
1836 -7:00 Canada M%sT
1837
1838
1839 # British Columbia
1840
1841 # From Paul Eggert (2006-03-22):
1842 # Shanks & Pottenger write that since 1970 most of this region has
1843 # been like Vancouver.
1844 # Dawson Creek uses MST. Much of east BC is like Edmonton.
1845 # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1846
1847 # It seems though that (re: Creston) is not entirely correct:
1848
1849 # From Chris Walton (2011-12-01):
1850 # There are two areas within the Canadian province of British Columbia
1851 # that do not currently observe daylight saving:
1852 # a) The Creston Valley (includes the town of Creston and surrounding area)
1853 # b) The eastern half of the Peace River Regional District
1854 # (includes the cities of Dawson Creek and Fort St. John)
1855
1856 # Earlier this year I stumbled across a detailed article about the time
1857 # keeping history of Creston; it was written by Tammy Hardwick who is the
1858 # manager of the Creston & District Museum. The article was written in May 2009.
1859 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1860 # According to the article, Creston has not changed its clocks since June 1918.
1861 # i.e. Creston has been stuck on UTC-7 for 93 years.
1862 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1863
1864 # Unfortunately the exact date for the time change in June 1918 remains
1865 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months
1866 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just
1867 # as plausible as any other date (in June). She also said that after writing
1868 # the article she had discovered another time change in 1916; this is the
1869 # subject of another article which she wrote in October 2010.
1870 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1871
1872 # Here is a summary of the three clock change events in Creston's history:
1873 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1874 # Exact date unknown
1875 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1876 # Exact date in October unknown; Sunday October 1 is a reasonable guess.
1877 # 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1878 # Exact date in June unknown; Sunday June 2 is a reasonable guess.
1879 # note 1:
1880 # On Oct 27/1918 when daylight saving ended in the rest of Canada,
1881 # Creston did not change its clocks.
1882 # note 2:
1883 # During WWII when the Federal Government legislated a mandatory clock change,
1884 # Creston did not oblige.
1885 # note 3:
1886 # There is no guarantee that Creston will remain on Mountain Standard Time
1887 # (UTC-7) forever.
1888 # The subject was debated at least once this year by the town Council.
1889 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1890
1891 # During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1892 # In Creston, that was handled by shifting the area to PST (-8:00) then applying
1893 # summer time to cause the offset to be -7:00, the same as it had been before
1894 # the change. It can be argued that the timezone abbreviation during this
1895 # period should be PDT rather than MST, but that doesn't seem important enough
1896 # (to anyone) to further complicate the rules.
1897
1898 # The transition dates (and times) are guesses.
1899
1900 # From Matt Johnson (2015-09-21):
1901 # Fort Nelson, BC, Canada will cancel DST this year. So while previously they
1902 # were aligned with America/Vancouver, they're now aligned with
1903 # America/Dawson_Creek.
1904 # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
1905 #
1906 # From Tim Parenti (2015-09-23):
1907 # This requires a new zone for the Northern Rockies Regional Municipality,
1908 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a
1909 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has
1910 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
1911 # 2015-03-08.
1912 #
1913 # From Paul Eggert (2015-09-23):
1914 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
1915
1916 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1917 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1918 Rule Vanc 1918 only - Oct 27 2:00 0 S
1919 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1920 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
1921 Rule Vanc 1945 only - Sep 30 2:00 0 S
1922 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1923 Rule Vanc 1946 only - Oct 13 2:00 0 S
1924 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1925 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
1926 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1927 Zone America/Vancouver -8:12:28 - LMT 1884
1928 -8:00 Vanc P%sT 1987
1929 -8:00 Canada P%sT
1930 Zone America/Dawson_Creek -8:00:56 - LMT 1884
1931 -8:00 Canada P%sT 1947
1932 -8:00 Vanc P%sT 1972 Aug 30 2:00
1933 -7:00 - MST
1934 Zone America/Fort_Nelson -8:10:47 - LMT 1884
1935 -8:00 Vanc P%sT 1946
1936 -8:00 - PST 1947
1937 -8:00 Vanc P%sT 1987
1938 -8:00 Canada P%sT 2015 Mar 8 2:00
1939 -7:00 - MST
1940 Zone America/Creston -7:46:04 - LMT 1884
1941 -7:00 - MST 1916 Oct 1
1942 -8:00 - PST 1918 Jun 2
1943 -7:00 - MST
1944
1945 # Northwest Territories, Nunavut, Yukon
1946
1947 # From Paul Eggert (2006-03-22):
1948 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1949 # Mathew Englander (1996-10-07) gives the following refs:
1950 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1951 # c. 7 defines Yukon standard time as UTC-9....
1952 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1953 # [http://canlii.ca/t/7vhg]
1954 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1955 # * O.I.C. 1980/02 established DST.
1956 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1957
1958 # From Brian Inglis (2015-04-14):
1959 #
1960 # I tried to trace the history of Yukon time and found the following
1961 # regulations, giving the reference title and URL if found, regulation name,
1962 # and relevant quote if available. Each regulation specifically revokes its
1963 # predecessor. The final reference is to the current Interpretation Act
1964 # authorizing and resulting from these regulatory changes.
1965 #
1966 # Only recent regulations were retrievable via Yukon government site search or
1967 # index, and only some via Canadian legal sources. Other sources used include
1968 # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
1969 # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
1970 # 1970 quoted below; each article includes current extracts from provincial
1971 # and territorial ST and DST regulations at the end, summaries and details of
1972 # standard times and daylight saving time at many locations across Canada,
1973 # with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
1974 # and LMST; they also cover many countries and global locations, with a chart
1975 # and table showing current Universal Time offsets, and may be useful as
1976 # another source of information for 1970 and earlier.
1977 #
1978 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
1979 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
1980 # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
1981 # Yukon Interpretation Ordinance
1982 # Yukon standard time is the local mean time at the one hundred and
1983 # thirty-fifth meridian.
1984 #
1985 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
1986 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
1987 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
1988 # Yukon Interpretation Ordinance, 1955, Chap. 16.
1989 #
1990 # (1) Subject to this section, standard time shall be reckoned as nine
1991 # hours behind Greenwich Time and called Yukon Standard Time.
1992 #
1993 # (2) Notwithstanding subsection (1), the Commissioner may make regulations
1994 # varying the manner of reckoning standard time.
1995 #
1996 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
1997 # http://? - no online source found
1998 #
1999 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
2000 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
2001 # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
2002 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
2003 #
2004 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
2005 # Territory on 27th January, 1966, is hereby revoked.
2006 #
2007 # 2. Yukon (East) Standard Time as defined by section 36 of the
2008 # Interpretation Ordinance from and after mid-night on the 28th day of May,
2009 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that
2010 # is to say, eight hours behind Greenwich Time in the area of the Yukon
2011 # Territory lying east of the 138th degree longitude west.
2012 #
2013 # 3. In the remainder of the Territory, lying west of the 138th degree
2014 # longitude west, Yukon (West) Standard Time shall be reckoned as nine
2015 # hours behind Greenwich Time.
2016 #
2017 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2018 # http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2019 # C.O. 1973/214 INTERPRETATION ACT ...
2020 #
2021 # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
2022 # revoked.
2023 #
2024 # 2. Yukon Standard Time as defined by section 36 of the Interpretation
2025 # Act from and after midnight on the twenty-eighth day of October, 1973
2026 # shall be reckoned in the same manner as Pacific Standard Time, that is
2027 # to say eight hours behind Greenwich Time.
2028 #
2029 # * O.I.C. 1980/02 INTERPRETATION ACT
2030 # http://? - no online source found
2031 #
2032 # * Yukon Daylight Saving Time, YOIC 1987/56
2033 # http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2034 # O.I.C. 1987/056 INTERPRETATION ACT ...
2035 #
2036 # In every year between
2037 # (a) two o'clock in the morning in the first Sunday in April, and
2038 # (b) two o'clock in the morning in the last Sunday in October,
2039 # Standard Time shall be reckoned as seven hours behind Greenwich Time and
2040 # called Yukon Daylight Saving Time.
2041 # ...
2042 # Dated ... 9th day of March, A.D., 1987.
2043 #
2044 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
2045 # http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2046 # O.I.C. 2006/127 INTERPRETATION ACT ...
2047 #
2048 # 1. In Yukon each year the time for general purposes shall be 7 hours
2049 # behind Greenwich mean time during the period commencing at two o'clock
2050 # in the forenoon on the second Sunday of March and ending at two o'clock
2051 # in the forenoon on the first Sunday of November and shall be called
2052 # Yukon Daylight Saving Time.
2053 #
2054 # 2. Order-in-Council 1987/56 is revoked.
2055 #
2056 # 3. This order comes into force January 1, 2007.
2057 #
2058 # * Interpretation Act, RSY 2002, c 125
2059 # http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
2060
2061 # From Rives McDow (1999-09-04):
2062 # Nunavut ... moved ... to incorporate the whole territory into one time zone.
2063 # Nunavut moves to single time zone Oct. 31
2064 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html
2065 #
2066 # From Antoine Leca (1999-09-06):
2067 # We then need to create a new timezone for the Kitikmeot region of Nunavut
2068 # to differentiate it from the Yellowknife region.
2069
2070 # From Paul Eggert (1999-09-20):
2071 # Basic Facts: The New Territory
2072 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
2073 # (1999) reports that Pangnirtung operates on eastern time,
2074 # and that Coral Harbour does not observe DST. We don't know when
2075 # Pangnirtung switched to eastern time; we'll guess 1995.
2076
2077 # From Rives McDow (1999-11-08):
2078 # On October 31, when the rest of Nunavut went to Central time,
2079 # Pangnirtung wobbled. Here is the result of their wobble:
2080 #
2081 # The following businesses and organizations in Pangnirtung use Central Time:
2082 #
2083 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
2084 # Eastern Arctic National Parks, A & D Specialist
2085 #
2086 # The following businesses and organizations in Pangnirtung use Eastern Time:
2087 #
2088 # Hamlet office, All other businesses, Both schools, Airport operator
2089 #
2090 # This has made for an interesting situation there, which warranted the news.
2091 # No one there that I spoke with seems concerned, or has plans to
2092 # change the local methods of keeping time, as it evidently does not
2093 # really interfere with any activities or make things difficult locally.
2094 # They plan to celebrate New Year's turn-over twice, one hour apart,
2095 # so it appears that the situation will last at least that long.
2096 # The Nunavut Intergovernmental Affairs hopes that they will "come to
2097 # their senses", but the locals evidently don't see any problem with
2098 # the current state of affairs.
2099
2100 # From Michaela Rodrigue, writing in the
2101 # Nunatsiaq News (1999-11-19):
2102 # http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html
2103 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
2104 # central - or Nunavut time - for government offices, and eastern time
2105 # for municipal offices and schools.... Igloolik [was similar but then]
2106 # made the switch to central time on Saturday, Nov. 6.
2107
2108 # From Paul Eggert (2000-10-02):
2109 # Matthews and Vincent (1998) say the following, but we lack histories
2110 # for these potential new Zones.
2111 #
2112 # The Canadian Forces station at Alert uses Eastern Time while the
2113 # handful of residents at the Eureka weather station [in the Central
2114 # zone] skip daylight savings. Baffin Island, which is crossed by the
2115 # Central, Eastern and Atlantic Time zones only uses Eastern Time.
2116 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
2117 # Central Time and Southampton Island [in the Central zone] is not
2118 # required to use daylight savings.
2119
2120 # From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html>
2121 # Nunavut now has two time zones (2000-11-10):
2122 # The Nunavut government would allow its employees in Kugluktuk and
2123 # Cambridge Bay to operate on central time year-round, putting them
2124 # one hour behind the rest of Nunavut for six months during the winter.
2125 # At the end of October the two communities had rebelled against
2126 # Nunavut's unified time zone, refusing to shift to eastern time with
2127 # the rest of the territory for the winter. Cambridge Bay remained on
2128 # central time, while Kugluktuk, even farther west, reverted to
2129 # mountain time, which they had used before the advent of Nunavut's
2130 # unified time zone in 1999.
2131 #
2132 # From Rives McDow (2001-01-20), quoting the Nunavut government:
2133 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
2134
2135 # From Paul Eggert (2000-12-04):
2136 # Let's just keep track of the official times for now.
2137
2138 # From Rives McDow (2001-03-07):
2139 # The premier of Nunavut has issued a ministerial statement advising
2140 # that effective 2001-04-01, the territory of Nunavut will revert
2141 # back to three time zones (mountain, central, and eastern). Of the
2142 # cities in Nunavut, Coral Harbor is the only one that I know of that
2143 # has said it will not observe dst, staying on EST year round. I'm
2144 # checking for more info, and will get back to you if I come up with
2145 # more.
2146 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2147
2148 # From Gwillim Law (2005-05-21):
2149 # According to ...
2150 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
2151 # (from a 1998 Canadian Geographic article), the de facto and de jure time
2152 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2153 # round. Using Google, it's easy to find other websites that confirm this.
2154 # I wasn't able to find how far back this time regimen goes, but since it
2155 # predates the creation of Nunavut, it probably goes back many years....
2156 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
2157 #
2158 # From Paul Eggert (2014-10-17):
2159 # For lack of better information, assume that Southampton Island observed
2160 # daylight saving only during wartime. Gwillim Law's email also
2161 # mentioned maps now maintained by National Research Council Canada;
2162 # see above for an up-to-date link.
2163
2164 # From Chris Walton (2007-03-01):
2165 # ... the community of Resolute (located on Cornwallis Island in
2166 # Nunavut) moved from Central Time to Eastern Time last November.
2167 # Basically the community did not change its clocks at the end of
2168 # daylight saving....
2169 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2170
2171 # From Chris Walton (2011-03-21):
2172 # Back in 2007 I initiated the creation of a new "zone file" for Resolute
2173 # Bay. Resolute Bay is a small community located about 900km north of
2174 # the Arctic Circle. The zone file was required because Resolute Bay had
2175 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2176 #
2177 # According to new information which I received last week, Resolute Bay
2178 # went back to using UTC-6 in the winter of 2007-2008...
2179 #
2180 # On March 11/2007 most of Canada went onto daylight saving. On March
2181 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2182 # talked to somebody that was both knowledgeable and helpful. I was able
2183 # to confirm that Resolute Bay was still operating on UTC-5. It was
2184 # explained to me that Resolute Bay had been on the Eastern Time zone
2185 # (EST) in the winter, and was now back on the Central Time zone (CDT).
2186 # i.e. the time zone had changed twice in the last year but the clocks
2187 # had not moved. The residents had to know which time zone they were in
2188 # so they could follow the correct TV schedule...
2189 #
2190 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2191 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
2192 # of the phone call, I decided to seek out an alternate source of
2193 # information. I found an e-mail address for somebody by the name of
2194 # Stephanie Adams whose job was listed as "Inns North Support Officer for
2195 # Arctic Co-operatives." I was under the impression that Stephanie lived
2196 # and worked in Resolute Bay...
2197 #
2198 # On March 14/2011 I phoned the hamlet office again. I was told that
2199 # Resolute Bay had been using Central Standard Time over the winter of
2200 # 2010-2011 and that the clocks had therefore been moved one hour ahead
2201 # on March 13/2011. The person I talked to was aware that Resolute Bay
2202 # had previously experimented with Eastern Standard Time but he could not
2203 # tell me when the practice had stopped.
2204 #
2205 # On March 17/2011 I searched the Web to find an e-mail address of
2206 # somebody that might be able to tell me exactly when Resolute Bay went
2207 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2208 # used to be the mayor of Resolute Bay and he apparently owns half the
2209 # businesses including "South Camp Inn." This website has some info on
2210 # Aziz:
2211 # http://www.uphere.ca/node/493
2212 #
2213 # I sent Aziz an e-mail asking when Resolute Bay had stopped using
2214 # Eastern Standard Time.
2215 #
2216 # Aziz responded quickly with this: "hi, The time was not changed for the
2217 # 1 year only, the following year, the community went back to the old way
2218 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2219 # the winter Zulu plus 6 hrs"
2220 #
2221 # This of course conflicted with everything I had ascertained in November 2008.
2222 #
2223 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2224 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
2225 # may want to check with the weather office in Resolute Bay or do a
2226 # search on the weather through Env. Canada. web site"
2227 #
2228 # If I had realized the Stephanie did not live in Resolute Bay I would
2229 # never have contacted her. I now believe that all the information I
2230 # obtained in November 2008 should be ignored...
2231 # I apologize for reporting incorrect information in 2008.
2232
2233 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2234 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
2235 Rule NT_YK 1918 only - Oct 27 2:00 0 S
2236 Rule NT_YK 1919 only - May 25 2:00 1:00 D
2237 Rule NT_YK 1919 only - Nov 1 0:00 0 S
2238 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
2239 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
2240 Rule NT_YK 1945 only - Sep 30 2:00 0 S
2241 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
2242 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
2243 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
2244 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
2245 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
2246 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2247 # aka Panniqtuuq
2248 Zone America/Pangnirtung 0 - -00 1921 # trading post est.
2249 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
2250 -5:00 Canada E%sT 1999 Oct 31 2:00
2251 -6:00 Canada C%sT 2000 Oct 29 2:00
2252 -5:00 Canada E%sT
2253 # formerly Frobisher Bay
2254 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est.
2255 -5:00 NT_YK E%sT 1999 Oct 31 2:00
2256 -6:00 Canada C%sT 2000 Oct 29 2:00
2257 -5:00 Canada E%sT
2258 # aka Qausuittuq
2259 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded
2260 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2261 -5:00 - EST 2001 Apr 1 3:00
2262 -6:00 Canada C%sT 2006 Oct 29 2:00
2263 -5:00 - EST 2007 Mar 11 3:00
2264 -6:00 Canada C%sT
2265 # aka Kangiqiniq
2266 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded
2267 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2268 -5:00 - EST 2001 Apr 1 3:00
2269 -6:00 Canada C%sT
2270 # aka Iqaluktuuttiaq
2271 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.?
2272 -7:00 NT_YK M%sT 1999 Oct 31 2:00
2273 -6:00 Canada C%sT 2000 Oct 29 2:00
2274 -5:00 - EST 2000 Nov 5 0:00
2275 -6:00 - CST 2001 Apr 1 3:00
2276 -7:00 Canada M%sT
2277 Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded?
2278 -7:00 NT_YK M%sT 1980
2279 -7:00 Canada M%sT
2280 Zone America/Inuvik 0 - -00 1953 # Inuvik founded
2281 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2282 -7:00 NT_YK M%sT 1980
2283 -7:00 Canada M%sT
2284 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2285 -9:00 NT_YK Y%sT 1967 May 28 0:00
2286 -8:00 NT_YK P%sT 1980
2287 -8:00 Canada P%sT
2288 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2289 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
2290 -8:00 NT_YK P%sT 1980
2291 -8:00 Canada P%sT
2292
2293
2294 ###############################################################################
2295
2296 # Mexico
2297
2298 # From Paul Eggert (2014-12-07):
2299 # The Investigation and Analysis Service of the
2300 # Mexican Library of Congress (MLoC) has published a
2301 # history of Mexican local time (in Spanish)
2302 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
2303 #
2304 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2305 # (In all cases we go with the MLoC.)
2306 # S&P report that Baja was at -8:00 in 1922/1923.
2307 # S&P say the 1930 transition in Baja was 1930-11-16.
2308 # S&P report no DST during summer 1931.
2309 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2310
2311 # From Gwillim Law (2001-02-20):
2312 # There are some other discrepancies between the Decrees page and the
2313 # tz database. I think they can best be explained by supposing that
2314 # the researchers who prepared the Decrees page failed to find some of
2315 # the relevant documents.
2316
2317 # From Alan Perry (1996-02-15):
2318 # A guy from our Mexico subsidiary finally found the Presidential Decree
2319 # outlining the timezone changes in Mexico.
2320 #
2321 # ------------- Begin Forwarded Message -------------
2322 #
2323 # I finally got my hands on the Official Presidential Decree that sets up the
2324 # rules for the DST changes. The rules are:
2325 #
2326 # 1. The country is divided in 3 timezones:
2327 # - Baja California Norte (the Mexico/BajaNorte TZ)
2328 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2329 # - The rest of the country (the Mexico/General TZ)
2330 #
2331 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
2332 # at 2:00 AM, the times in each zone are as follows:
2333 # BajaNorte: GMT+7
2334 # BajaSur: GMT+6
2335 # General: GMT+5
2336 #
2337 # 3. The rest of the year, the times are as follows:
2338 # BajaNorte: GMT+8
2339 # BajaSur: GMT+7
2340 # General: GMT+6
2341 #
2342 # The Decree was published in Mexico's Official Newspaper on January 4th.
2343 #
2344 # -------------- End Forwarded Message --------------
2345 # From Paul Eggert (1996-06-12):
2346 # For an English translation of the decree, see
2347 # "Diario Oficial: Time Zone Changeover" (1996-01-04).
2348 # http://mexico-travel.com/extra/timezone_eng.html
2349
2350 # From Rives McDow (1998-10-08):
2351 # The State of Quintana Roo has reverted back to central STD and DST times
2352 # (i.e. UTC -0600 and -0500 as of 1998-08-02).
2353
2354 # From Rives McDow (2000-01-10):
2355 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2356 # zone 5 hours from the International Date Line, and will not observe daylight
2357 # savings time so as to stay on the same time zone as the southern part of
2358 # Arizona year round.
2359
2360 # From Jesper Nørgaard, translating
2361 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2362 # In Oaxaca, the 55.000 teachers from the Section 22 of the National
2363 # Syndicate of Education Workers, refuse to apply daylight saving each
2364 # year, so that the more than 10,000 schools work at normal hour the
2365 # whole year.
2366
2367 # From Gwillim Law (2001-01-19):
2368 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
2369 # (translated):...
2370 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2371 # that Summer Time will be reduced from seven to five months, starting
2372 # this year....
2373 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2374 # [translated], says "summer time will ... take effect on the first Sunday
2375 # in May, and end on the last Sunday of September.
2376
2377 # From Arthur David Olson (2001-01-25):
2378 # The 2001-01-24 traditional Washington Post contained the page one
2379 # story "Timely Issue Divides Mexicans."...
2380 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2381 # ... Mexico City Mayor López Obrador "...is threatening to keep
2382 # Mexico City and its 20 million residents on a different time than
2383 # the rest of the country..." In particular, López Obrador would abolish
2384 # observation of Daylight Saving Time.
2385
2386 # Official statute published by the Energy Department
2387 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2388 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2389 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03).
2390
2391 # From Paul Eggert (2001-03-03):
2392 #
2393 # http://www.latimes.com/news/nation/20010303/t000018766.html
2394 # James F. Smith writes in today's LA Times
2395 # * Sonora will continue to observe standard time.
2396 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
2397 # the Federal District will not adopt DST.
2398 # * 4 of 16 district leaders announced they'll ignore the decree.
2399 # * The decree does not affect federal-controlled facilities including
2400 # the airport, banks, hospitals, and schools.
2401 #
2402 # For now we'll assume that the Federal District will bow to federal rules.
2403
2404 # From Jesper Nørgaard (2001-04-01):
2405 # I found some references to the Mexican application of daylight
2406 # saving, which modifies what I had already sent you, stating earlier
2407 # that a number of northern Mexican states would go on daylight
2408 # saving. The modification reverts this to only cover Baja California
2409 # (Norte), while all other states (except Sonora, who has no daylight
2410 # saving all year) will follow the original decree of president
2411 # Vicente Fox, starting daylight saving May 6, 2001 and ending
2412 # September 30, 2001.
2413 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
2414 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2415
2416 # From Reuters (2001-09-04):
2417 # Mexico's Supreme Court on Tuesday declared that daylight savings was
2418 # unconstitutional in Mexico City, creating the possibility the
2419 # capital will be in a different time zone from the rest of the nation
2420 # next year.... The Supreme Court's ruling takes effect at 2:00
2421 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
2422 # standard time. "This is so residents of the Federal District are not
2423 # subject to unexpected time changes," a statement from the court said.
2424
2425 # From Jesper Nørgaard Welen (2002-03-12):
2426 # ... consulting my local grocery store(!) and my coworkers, they all insisted
2427 # that a new decision had been made to reinstate US style DST in Mexico....
2428 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2429 # confirms this. Sonora as usual is the only state where DST is not applied.
2430
2431 # From Steffen Thorsen (2009-12-28):
2432 #
2433 # Steffen Thorsen wrote:
2434 # > Mexico's House of Representatives has approved a proposal for northern
2435 # > Mexico's border cities to share the same daylight saving schedule as
2436 # > the United States.
2437 # Now this has passed both the Congress and the Senate, so starting from
2438 # 2010, some border regions will be the same:
2439 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2440 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2441 # (Spanish)
2442 #
2443 # Could not find the new law text, but the proposed law text changes are here:
2444 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2445 # (Gaceta Parlamentaria)
2446 #
2447 # There is also a list of the votes here:
2448 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2449 #
2450 # Our page:
2451 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2452
2453 # From Arthur David Olson (2010-01-20):
2454 # The page
2455 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2456 # includes this text:
2457 # En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2458 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila;
2459 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en
2460 # Tamaulipas, la aplicación de este horario estacional surtirá efecto
2461 # desde las dos horas del segundo domingo de marzo y concluirá a las dos
2462 # horas del primer domingo de noviembre.
2463 # En los municipios fronterizos que se encuentren ubicados en la franja
2464 # fronteriza norte en el territorio comprendido entre la línea
2465 # internacional y la línea paralela ubicada a una distancia de veinte
2466 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
2467 # interior del país, la aplicación de este horario estacional surtirá
2468 # efecto desde las dos horas del segundo domingo de marzo y concluirá a
2469 # las dos horas del primer domingo de noviembre.
2470
2471 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2472 # The Mexican state of Quintana Roo will likely change to EST in 2015.
2473 #
2474 # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2475 # "With this change, the time conflict that has existed between the municipios
2476 # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
2477 # end. The latter declared itself in rebellion 15 years ago when a time change
2478 # was initiated in Mexico, and since then it has refused to change its time
2479 # zone along with the rest of the country."
2480 #
2481 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2482 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2483 # "...the new time zone will come into effect at two o'clock on the first Sunday
2484 # of February, when we will have to advance the clock one hour from its current
2485 # time..."
2486 # Also, the new zone will not use DST.
2487 #
2488 # From Carlos Raúl Perasso (2015-02-02):
2489 # The decree that modifies the Mexican Hour System Law has finally
2490 # been published at the Diario Oficial de la Federación
2491 # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
2492 # It establishes 5 zones for Mexico:
2493 # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2494 # includes most of Mexico, excluding what's mentioned below.
2495 # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
2496 # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía
2497 # de Banderas which lies in Central Zone); Sinaloa and Sonora.
2498 # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2499 # state of Baja California.
2500 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2501 # of Quintana Roo.
2502 # 5- The islands, reefs and keys shall take their timezone from the
2503 # longitude they are located at.
2504
2505 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2506 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2507 Rule Mexico 1939 only - Jun 25 0:00 0 S
2508 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2509 Rule Mexico 1941 only - Apr 1 0:00 0 S
2510 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2511 Rule Mexico 1944 only - May 1 0:00 0 S
2512 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2513 Rule Mexico 1950 only - Jul 30 0:00 0 S
2514 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2515 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2516 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2517 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2518 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2519 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2520 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2521 # Quintana Roo; represented by Cancún
2522 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2523 -6:00 - CST 1981 Dec 23
2524 -5:00 Mexico E%sT 1998 Aug 2 2:00
2525 -6:00 Mexico C%sT 2015 Feb 1 2:00
2526 -5:00 - EST
2527 # Campeche, Yucatán; represented by Mérida
2528 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2529 -6:00 - CST 1981 Dec 23
2530 -5:00 - EST 1982 Dec 2
2531 -6:00 Mexico C%sT
2532 # Coahuila, Nuevo León, Tamaulipas (near US border)
2533 # This includes the following municipalities:
2534 # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava,
2535 # Guerrero, Hidalgo.
2536 # in Nuevo León: Anáhuac, Los Aldama.
2537 # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
2538 # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
2539 # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal,
2540 # 2016-03-12
2541 # http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza
2542 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00
2543 -6:00 - CST 1988
2544 -6:00 US C%sT 1989
2545 -6:00 Mexico C%sT 2010
2546 -6:00 US C%sT
2547 # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border)
2548 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
2549 -6:00 - CST 1988
2550 -6:00 US C%sT 1989
2551 -6:00 Mexico C%sT
2552 # Central Mexico
2553 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
2554 -7:00 - MST 1927 Jun 10 23:00
2555 -6:00 - CST 1930 Nov 15
2556 -7:00 - MST 1931 May 1 23:00
2557 -6:00 - CST 1931 Oct
2558 -7:00 - MST 1932 Apr 1
2559 -6:00 Mexico C%sT 2001 Sep 30 2:00
2560 -6:00 - CST 2002 Feb 20
2561 -6:00 Mexico C%sT
2562 # Chihuahua (near US border)
2563 # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe,
2564 # Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides.
2565 # (See the 2016-03-12 El Universal source mentioned above.)
2566 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20
2567 -7:00 - MST 1927 Jun 10 23:00
2568 -6:00 - CST 1930 Nov 15
2569 -7:00 - MST 1931 May 1 23:00
2570 -6:00 - CST 1931 Oct
2571 -7:00 - MST 1932 Apr 1
2572 -6:00 - CST 1996
2573 -6:00 Mexico C%sT 1998
2574 -6:00 - CST 1998 Apr Sun>=1 3:00
2575 -7:00 Mexico M%sT 2010
2576 -7:00 US M%sT
2577 # Chihuahua (away from US border)
2578 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
2579 -7:00 - MST 1927 Jun 10 23:00
2580 -6:00 - CST 1930 Nov 15
2581 -7:00 - MST 1931 May 1 23:00
2582 -6:00 - CST 1931 Oct
2583 -7:00 - MST 1932 Apr 1
2584 -6:00 - CST 1996
2585 -6:00 Mexico C%sT 1998
2586 -6:00 - CST 1998 Apr Sun>=1 3:00
2587 -7:00 Mexico M%sT
2588 # Sonora
2589 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
2590 -7:00 - MST 1927 Jun 10 23:00
2591 -6:00 - CST 1930 Nov 15
2592 -7:00 - MST 1931 May 1 23:00
2593 -6:00 - CST 1931 Oct
2594 -7:00 - MST 1932 Apr 1
2595 -6:00 - CST 1942 Apr 24
2596 -7:00 - MST 1949 Jan 14
2597 -8:00 - PST 1970
2598 -7:00 Mexico M%sT 1999
2599 -7:00 - MST
2600
2601 # From Alexander Krivenyshev (2010-04-21):
2602 # According to news, Bahía de Banderas (Mexican state of Nayarit)
2603 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2604 # share the same time zone as nearby city Puerto Vallarta, Jalisco).
2605 #
2606 # (Spanish)
2607 # Bahía de Banderas homologa su horario al del centro del
2608 # país, a partir de este domingo
2609 # http://www.nayarit.gob.mx/notes.asp?id=20748
2610 #
2611 # Bahía de Banderas homologa su horario con el del Centro del
2612 # País
2613 # http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50
2614 #
2615 # (English)
2616 # Puerto Vallarta and Bahía de Banderas: One Time Zone
2617 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2618 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
2619 #
2620 # "Mexico's Senate approved the amendments to the Mexican Schedule System that
2621 # will allow Bahía de Banderas and Puerto Vallarta to share the same time
2622 # zone ..."
2623 # Baja California Sur, Nayarit, Sinaloa
2624
2625 # From Arthur David Olson (2010-05-01):
2626 # Use "Bahia_Banderas" to keep the name to fourteen characters.
2627
2628 # Mazatlán
2629 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
2630 -7:00 - MST 1927 Jun 10 23:00
2631 -6:00 - CST 1930 Nov 15
2632 -7:00 - MST 1931 May 1 23:00
2633 -6:00 - CST 1931 Oct
2634 -7:00 - MST 1932 Apr 1
2635 -6:00 - CST 1942 Apr 24
2636 -7:00 - MST 1949 Jan 14
2637 -8:00 - PST 1970
2638 -7:00 Mexico M%sT
2639
2640 # Bahía de Banderas
2641 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00
2642 -7:00 - MST 1927 Jun 10 23:00
2643 -6:00 - CST 1930 Nov 15
2644 -7:00 - MST 1931 May 1 23:00
2645 -6:00 - CST 1931 Oct
2646 -7:00 - MST 1932 Apr 1
2647 -6:00 - CST 1942 Apr 24
2648 -7:00 - MST 1949 Jan 14
2649 -8:00 - PST 1970
2650 -7:00 Mexico M%sT 2010 Apr 4 2:00
2651 -6:00 Mexico C%sT
2652
2653 # Baja California
2654 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
2655 -7:00 - MST 1924
2656 -8:00 - PST 1927 Jun 10 23:00
2657 -7:00 - MST 1930 Nov 15
2658 -8:00 - PST 1931 Apr 1
2659 -8:00 1:00 PDT 1931 Sep 30
2660 -8:00 - PST 1942 Apr 24
2661 -8:00 1:00 PWT 1945 Aug 14 23:00u
2662 -8:00 1:00 PPT 1945 Nov 12 # Peace
2663 -8:00 - PST 1948 Apr 5
2664 -8:00 1:00 PDT 1949 Jan 14
2665 -8:00 - PST 1954
2666 -8:00 CA P%sT 1961
2667 -8:00 - PST 1976
2668 -8:00 US P%sT 1996
2669 -8:00 Mexico P%sT 2001
2670 -8:00 US P%sT 2002 Feb 20
2671 -8:00 Mexico P%sT 2010
2672 -8:00 US P%sT
2673 # From Paul Eggert (2006-03-22):
2674 # Formerly there was an America/Ensenada zone, which differed from
2675 # America/Tijuana only in that it did not observe DST from 1976
2676 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
2677 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
2678 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
2679 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2680 # DST-observance was a town-by-town matter back then. This concerns
2681 # data after 1970 so most likely there should be at least one Zone
2682 # other than America/Tijuana for Baja, but it's not clear yet what its
2683 # name or contents should be.
2684 #
2685 # From Paul Eggert (2015-10-08):
2686 # Formerly there was an America/Santa_Isabel zone, but this appears to
2687 # have come from a misreading of
2688 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2689 # It has been moved to the 'backward' file.
2690 #
2691 #
2692 # Revillagigedo Is
2693 # no information
2694
2695 ###############################################################################
2696
2697 # Anguilla
2698 # Antigua and Barbuda
2699 # See America/Port_of_Spain.
2700
2701 # Bahamas
2702 #
2703 # For 1899 Milne gives -5:09:29.5; round that.
2704 #
2705 # From Sue Williams (2006-12-07):
2706 # The Bahamas announced about a month ago that they plan to change their DST
2707 # rules to sync with the U.S. starting in 2007....
2708 # http://www.jonesbahamas.com/?c=45&a=10412
2709
2710 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2711 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2712 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
2713 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2714 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2
2715 -5:00 Bahamas E%sT 1976
2716 -5:00 US E%sT
2717
2718 # Barbados
2719
2720 # For 1899 Milne gives -3:58:29.2; round that.
2721
2722 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2723 Rule Barb 1977 only - Jun 12 2:00 1:00 D
2724 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2725 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2726 Rule Barb 1979 only - Sep 30 2:00 0 S
2727 Rule Barb 1980 only - Sep 25 2:00 0 S
2728 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2729 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown
2730 -3:58:29 - BMT 1932 # Bridgetown Mean Time
2731 -4:00 Barb A%sT
2732
2733 # Belize
2734 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2735 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2736 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
2737 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
2738 Rule Belize 1973 only - Dec 5 0:00 1:00 D
2739 Rule Belize 1974 only - Feb 9 0:00 0 S
2740 Rule Belize 1982 only - Dec 18 0:00 1:00 D
2741 Rule Belize 1983 only - Feb 12 0:00 0 S
2742 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2743 Zone America/Belize -5:52:48 - LMT 1912 Apr
2744 -6:00 Belize C%sT
2745
2746 # Bermuda
2747
2748 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2749 # Bermuda dockyard, Ireland I; round that.
2750
2751 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2752
2753 # Next year, however, clocks in the US will go forward on the second Sunday
2754 # in March, until the first Sunday in November. And, after the Time Zone
2755 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2756 # Friday, the same thing will happen in Bermuda.
2757 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2758
2759 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2760 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton
2761 -4:00 - AST 1974 Apr 28 2:00
2762 -4:00 Canada A%sT 1976
2763 -4:00 US A%sT
2764
2765 # Cayman Is
2766 # See America/Panama.
2767
2768 # Costa Rica
2769
2770 # Milne gives -5:36:13.3 as San José mean time; round to nearest.
2771
2772 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2773 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2774 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2775 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2776 # IATA SSIM (1991-09) says the following was at 1:00;
2777 # go with Shanks & Pottenger.
2778 Rule CR 1991 only - Jul 1 0:00 0 S
2779 Rule CR 1992 only - Mar 15 0:00 0 S
2780 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2781 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2782 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José
2783 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time
2784 -6:00 CR C%sT
2785 # Coco
2786 # no information; probably like America/Costa_Rica
2787
2788 # Cuba
2789
2790 # From Paul Eggert (2013-02-21):
2791 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2792 # for the port, and -5:30 for meteorological observations.
2793 # For now, stick with Shanks & Pottenger.
2794
2795 # From Arthur David Olson (1999-03-29):
2796 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2797 # the Cuban National Team and the Baltimore Orioles was carried live on
2798 # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2799 # During the game, play-by-play announcer Jim Hunter noted that
2800 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2801 # Time today." (The "two hour" remark referred to losing one hour of
2802 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched
2803 # to DST - and one more hour on 1999-04-04 - when the announcers will have
2804 # returned to Baltimore, which switches on that date.)
2805
2806 # From Steffen Thorsen (2013-11-11):
2807 # DST start in Cuba in 2004 ... does not follow the same rules as the
2808 # years before. The correct date should be Sunday 2004-03-28 00:00 ...
2809 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html
2810
2811 # From Evert van der Veer via Steffen Thorsen (2004-10-28):
2812 # Cuba is not going back to standard time this year.
2813 # From Paul Eggert (2006-03-22):
2814 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2815 # says that it's due to a problem at the Antonio Guiteras
2816 # thermoelectric plant, and says "This October there will be no return
2817 # to normal hours (after daylight saving time)".
2818 # For now, let's assume that it's a temporary measure.
2819
2820 # From Carlos A. Carnero Delgado (2005-11-12):
2821 # This year (just like in 2004-2005) there's no change in time zone
2822 # adjustment in Cuba. We will stay in daylight saving time:
2823 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2824
2825 # From Jesper Nørgaard Welen (2006-10-21):
2826 # An article in GRANMA INTERNACIONAL claims that Cuba will end
2827 # the 3 years of permanent DST next weekend, see
2828 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2829 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2830 # watches should be set back one hour - going back to 00:00 hours - returning
2831 # to the normal schedule....
2832
2833 # From Paul Eggert (2007-03-02):
2834 # <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday,
2835 # says Cuban clocks will advance at midnight on March 10.
2836 # For lack of better information, assume Cuba will use US rules,
2837 # except that it switches at midnight standard time as usual.
2838 #
2839 # From Steffen Thorsen (2007-10-25):
2840 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2841 # earlier - on the last Sunday of October, just like in 2006.
2842 #
2843 # He supplied these references:
2844 #
2845 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2846 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2847 #
2848 # From Alex Krivenyshev (2007-10-25):
2849 # Here is also article from Granma (Cuba):
2850 #
2851 # Regirá el Horario Normal desde el próximo domingo 28 de octubre
2852 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2853 #
2854 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
2855
2856 # From Arthur David Olson (2008-03-09):
2857 # I'm in Maryland which is now observing United States Eastern Daylight
2858 # Time. At 9:44 local time I used RealPlayer to listen to
2859 # http://media.enet.cu/radioreloj
2860 # a Cuban information station, and heard
2861 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2862 # indicating that Cuba is still on standard time.
2863
2864 # From Steffen Thorsen (2008-03-12):
2865 # It seems that Cuba will start DST on Sunday, 2007-03-16...
2866 # It was announced yesterday, according to this source (in Spanish):
2867 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2868 #
2869 # Some more background information is posted here:
2870 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2871 #
2872 # The article also says that Cuba has been observing DST since 1963,
2873 # while Shanks (and tzdata) has 1965 as the first date (except in the
2874 # 1940's). Many other web pages in Cuba also claim that it has been
2875 # observed since 1963, but with the exception of 1970 - an exception
2876 # which is not present in tzdata/Shanks. So there is a chance we need to
2877 # change some historic records as well.
2878 #
2879 # One example:
2880 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2881
2882 # From Jesper Nørgaard Welen (2008-03-13):
2883 # The Cuban time change has just been confirmed on the most authoritative
2884 # web site, the Granma. Please check out
2885 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2886 #
2887 # Basically as expected after Steffen Thorsen's information, the change
2888 # will take place midnight between Saturday and Sunday.
2889
2890 # From Arthur David Olson (2008-03-12):
2891 # Assume Sun>=15 (third Sunday) going forward.
2892
2893 # From Alexander Krivenyshev (2009-03-04)
2894 # According to the Radio Reloj - Cuba will start Daylight Saving Time on
2895 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2896 # not on midnight March 14 / March 15 as previously thought.
2897 #
2898 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2899 # (in Spanish)
2900
2901 # From Arthur David Olson (2009-03-09)
2902 # I listened over the Internet to
2903 # http://media.enet.cu/readioreloj
2904 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2905 # the time was announced as "diez cinco" - the same time as here, indicating
2906 # that has indeed switched to DST. Assume second Sunday from 2009 forward.
2907
2908 # From Steffen Thorsen (2011-03-08):
2909 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2910 # this year. Nothing about the end date known so far (if that has
2911 # changed at all).
2912 #
2913 # Source:
2914 # http://granma.co.cu/2011/03/08/nacional/artic01.html
2915 #
2916 # Our info:
2917 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2918 #
2919 # From Steffen Thorsen (2011-10-30)
2920 # Cuba will end DST two weeks later this year. Instead of going back
2921 # tonight, it has been delayed to 2011-11-13 at 01:00.
2922 #
2923 # One source (Spanish)
2924 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2925 #
2926 # Our page:
2927 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2928 #
2929 # From Steffen Thorsen (2012-03-01)
2930 # According to Radio Reloj, Cuba will start DST on Midnight between March
2931 # 31 and April 1.
2932 #
2933 # Radio Reloj has the following info (Spanish):
2934 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2935 #
2936 # Our info on it:
2937 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2938
2939 # From Steffen Thorsen (2012-11-03):
2940 # Radio Reloj and many other sources report that Cuba is changing back
2941 # to standard time on 2012-11-04:
2942 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2943 # From Paul Eggert (2012-11-03):
2944 # For now, assume the future rule is first Sunday in November.
2945
2946 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2947 Rule Cuba 1928 only - Jun 10 0:00 1:00 D
2948 Rule Cuba 1928 only - Oct 10 0:00 0 S
2949 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
2950 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
2951 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
2952 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
2953 Rule Cuba 1965 only - Jun 1 0:00 1:00 D
2954 Rule Cuba 1965 only - Sep 30 0:00 0 S
2955 Rule Cuba 1966 only - May 29 0:00 1:00 D
2956 Rule Cuba 1966 only - Oct 2 0:00 0 S
2957 Rule Cuba 1967 only - Apr 8 0:00 1:00 D
2958 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
2959 Rule Cuba 1968 only - Apr 14 0:00 1:00 D
2960 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
2961 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
2962 Rule Cuba 1972 1974 - Oct 8 0:00 0 S
2963 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
2964 Rule Cuba 1978 only - May 7 0:00 1:00 D
2965 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
2966 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
2967 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
2968 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
2969 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
2970 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
2971 Rule Cuba 1996 only - Oct 6 0:00s 0 S
2972 Rule Cuba 1997 only - Oct 12 0:00s 0 S
2973 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
2974 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
2975 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D
2976 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D
2977 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S
2978 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
2979 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
2980 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D
2981 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D
2982 Rule Cuba 2011 only - Nov 13 0:00s 0 S
2983 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D
2984 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S
2985 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D
2986
2987 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2988 Zone America/Havana -5:29:28 - LMT 1890
2989 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
2990 -5:00 Cuba C%sT
2991
2992 # Dominica
2993 # See America/Port_of_Spain.
2994
2995 # Dominican Republic
2996
2997 # From Steffen Thorsen (2000-10-30):
2998 # Enrique Morales reported to me that the Dominican Republic has changed the
2999 # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
3000 # http://www.listin.com.do/antes/261000/republica/princi.html
3001
3002 # From Paul Eggert (2000-12-04):
3003 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
3004
3005 # From Rives McDow (2000-12-01):
3006 # Dominican Republic changed its mind and presidential decree on Tuesday,
3007 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
3008 # Dominican Republic will be reverting to 8 hours from the International Date
3009 # Line, and will not be using DST in the foreseeable future. The reason they
3010 # decided to use DST was to be in synch with Puerto Rico, who was also going
3011 # to implement DST. When Puerto Rico didn't implement DST, the president
3012 # decided to revert.
3013
3014
3015 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3016 Rule DR 1966 only - Oct 30 0:00 1:00 D
3017 Rule DR 1967 only - Feb 28 0:00 0 S
3018 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
3019 Rule DR 1970 only - Feb 21 0:00 0 S
3020 Rule DR 1971 only - Jan 20 0:00 0 S
3021 Rule DR 1972 1974 - Jan 21 0:00 0 S
3022 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3023 Zone America/Santo_Domingo -4:39:36 - LMT 1890
3024 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
3025 -5:00 DR E%sT 1974 Oct 27
3026 -4:00 - AST 2000 Oct 29 2:00
3027 -5:00 US E%sT 2000 Dec 3 1:00
3028 -4:00 - AST
3029
3030 # El Salvador
3031
3032 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3033 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
3034 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
3035 # There are too many San Salvadors elsewhere, so use America/El_Salvador
3036 # instead of America/San_Salvador.
3037 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3038 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
3039 -6:00 Salv C%sT
3040
3041 # Grenada
3042 # Guadeloupe
3043 # St Barthélemy
3044 # St Martin (French part)
3045 # See America/Port_of_Spain.
3046
3047 # Guatemala
3048 #
3049 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3050 # Diario Co Latino, at
3051 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
3052 # says in an article dated 2006-04-19 that the Guatemalan government had
3053 # decided on that date to advance official time by 60 minutes, to lessen the
3054 # impact of the elevated cost of oil.... Daylight saving time will last from
3055 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3056 # From Paul Eggert (2006-06-22):
3057 # The Ministry of Energy and Mines, press release CP-15/2006
3058 # (2006-04-19), says DST ends at 24:00. See
3059 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
3060
3061 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3062 Rule Guat 1973 only - Nov 25 0:00 1:00 D
3063 Rule Guat 1974 only - Feb 24 0:00 0 S
3064 Rule Guat 1983 only - May 21 0:00 1:00 D
3065 Rule Guat 1983 only - Sep 22 0:00 0 S
3066 Rule Guat 1991 only - Mar 23 0:00 1:00 D
3067 Rule Guat 1991 only - Sep 7 0:00 0 S
3068 Rule Guat 2006 only - Apr 30 0:00 1:00 D
3069 Rule Guat 2006 only - Oct 1 0:00 0 S
3070 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3071 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
3072 -6:00 Guat C%sT
3073
3074 # Haiti
3075 # From Gwillim Law (2005-04-15):
3076 # Risto O. Nykänen wrote me that Haiti is now on DST.
3077 # I searched for confirmation, and I found a press release
3078 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3079 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says:
3080 #
3081 # "The Prime Minister's Communication Office notifies the public in general
3082 # and the press in particular that, following a decision of the Interior
3083 # Ministry and the Territorial Collectivities [I suppose that means the
3084 # provinces], Haiti will move to Eastern Daylight Time in the night from next
3085 # Saturday the 2nd to Sunday the 3rd.
3086 #
3087 # "Consequently, the Prime Minister's Communication Office wishes to inform
3088 # the population that the country's clocks will be set forward one hour
3089 # starting at midnight. This provision will hold until the last Saturday in
3090 # October 2005.
3091 #
3092 # "Port-au-Prince, March 31, 2005"
3093 #
3094 # From Steffen Thorsen (2006-04-04):
3095 # I have been informed by users that Haiti observes DST this year like
3096 # last year, so the current "only" rule for 2005 might be changed to a
3097 # "max" rule or to last until 2006. (Who knows if they will observe DST
3098 # next year or if they will extend their DST like US/Canada next year).
3099 #
3100 # I have found this article about it (in French):
3101 # http://www.haitipressnetwork.com/news.cfm?articleID=7612
3102 #
3103 # The reason seems to be an energy crisis.
3104
3105 # From Stephen Colebourne (2007-02-22):
3106 # Some IATA info: Haiti won't be having DST in 2007.
3107
3108 # From Steffen Thorsen (2012-03-11):
3109 # According to several news sources, Haiti will observe DST this year,
3110 # apparently using the same start and end date as USA/Canada.
3111 # So this means they have already changed their time.
3112 #
3113 # http://www.alterpresse.org/spip.php?article12510
3114 # http://radiovision2000haiti.net/home/?p=13253
3115 #
3116 # From Arthur David Olson (2012-03-11):
3117 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3118 # 3:00 a.m. rather than the traditional Haitian jump at midnight.
3119 # Assume a US-style fall back as well.
3120
3121 # From Steffen Thorsen (2013-03-10):
3122 # It appears that Haiti is observing DST this year as well, same rules
3123 # as US/Canada. They did it last year as well, and it looks like they
3124 # are going to observe DST every year now...
3125 #
3126 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3127 # http://www.canalplushaiti.net/?p=6714
3128
3129 # From Steffen Thorsen (2016-03-12):
3130 # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
3131 # are not going on DST this year. Several other resources confirm this: ...
3132 # http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
3133 # http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
3134 # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
3135
3136 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3137 Rule Haiti 1983 only - May 8 0:00 1:00 D
3138 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
3139 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
3140 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3141 # Go with IATA.
3142 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
3143 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
3144 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
3145 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
3146 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D
3147 Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S
3148 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3149 Zone America/Port-au-Prince -4:49:20 - LMT 1890
3150 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
3151 -5:00 Haiti E%sT
3152
3153 # Honduras
3154 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3155
3156 # From Paul Eggert (2006-05-05):
3157 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3158 # saying Honduras will start using DST midnight Saturday, effective 4
3159 # months until September. La Tribuna reported today
3160 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3161 # of Honduras, refused to back down on this.
3162
3163 # From Jesper Nørgaard Welen (2006-08-08):
3164 # It seems that Honduras has returned from DST to standard time this Monday at
3165 # 00:00 hours (prolonging Sunday to 25 hours duration).
3166 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3167
3168 # From Paul Eggert (2006-08-08):
3169 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3170 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3171 # It mentions executive decree 18-2006.
3172
3173 # From Steffen Thorsen (2006-08-17):
3174 # Honduras will observe DST from 2007 to 2009, exact dates are not
3175 # published, I have located this authoritative source:
3176 # http://www.presidencia.gob.hn/noticia.aspx?nId=47
3177
3178 # From Steffen Thorsen (2007-03-30):
3179 # http://www.laprensahn.com/pais_nota.php?id04962=7386
3180 # So it seems that Honduras will not enter DST this year....
3181
3182 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3183 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
3184 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
3185 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
3186 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3187 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3188 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3189 -6:00 Hond C%sT
3190 #
3191 # Great Swan I ceded by US to Honduras in 1972
3192
3193 # Jamaica
3194 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3195 # unspecified official document, and says "This time is used throughout the
3196 # island". Go with Milne. Round to the nearest second as required by zic.
3197 #
3198 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3199 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3200 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that
3201 # Manley's supporters associated this act with Manley's nickname "Joshua"
3202 # (recall that in the Bible the sun stood still at Joshua's request),
3203 # and with the Rod of Correction which Manley said he had received from
3204 # Haile Selassie, Emperor of Ethiopia. See:
3205 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3206 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3207 #
3208 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3209 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston
3210 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3211 -5:00 - EST 1974
3212 -5:00 US E%sT 1984
3213 -5:00 - EST
3214
3215 # Martinique
3216 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3217 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3218 -4:04:20 - FFMT 1911 May # Fort-de-France MT
3219 -4:00 - AST 1980 Apr 6
3220 -4:00 1:00 ADT 1980 Sep 28
3221 -4:00 - AST
3222
3223 # Montserrat
3224 # See America/Port_of_Spain.
3225
3226 # Nicaragua
3227 #
3228 # This uses Shanks & Pottenger for times before 2005.
3229 #
3230 # From Steffen Thorsen (2005-04-12):
3231 # I've got reports from 8 different people that Nicaragua just started
3232 # DST on Sunday 2005-04-10, in order to save energy because of
3233 # expensive petroleum. The exact end date for DST is not yet
3234 # announced, only "September" but some sites also say "mid-September".
3235 # Some background information is available on the President's official site:
3236 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3237 # The Decree, no 23-2005 is available here:
3238 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf
3239 #
3240 # From Paul Eggert (2005-05-01):
3241 # The decree doesn't say anything about daylight saving, but for now let's
3242 # assume that it is daylight saving....
3243 #
3244 # From Gwillim Law (2005-04-21):
3245 # The Associated Press story on the time change, which can be found at
3246 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
3247 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last
3248 # time that a change of clocks was applied to save energy was in the year 2000
3249 # during the Arnoldo Alemán administration."...
3250 # The northamerica file says that Nicaragua has been on UTC-6 continuously
3251 # since December 1998. I wasn't able to find any details of Nicaraguan time
3252 # changes in 2000. Perhaps a note could be added to the northamerica file, to
3253 # the effect that we have indirect evidence that DST was observed in 2000.
3254 #
3255 # From Jesper Nørgaard Welen (2005-11-02):
3256 # Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3257 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3258 # (2005-09-26)
3259 #
3260 # From Jesper Nørgaard Welen (2006-05-05):
3261 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3262 # (my informal translation)
3263 # By order of the president of the republic, Enrique Bolaños, Nicaragua
3264 # advanced by sixty minutes their official time, yesterday at 2 in the
3265 # morning, and will stay that way until 30th of September.
3266 #
3267 # From Jesper Nørgaard Welen (2006-09-30):
3268 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3269 # My informal translation runs:
3270 # The natural sun time is restored in all the national territory, in that the
3271 # time is returned one hour at 01:00 am of October 1 of 2006.
3272 #
3273 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3274 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
3275 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
3276 Rule Nic 2005 only - Apr 10 0:00 1:00 D
3277 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
3278 Rule Nic 2006 only - Apr 30 2:00 1:00 D
3279 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
3280 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3281 Zone America/Managua -5:45:08 - LMT 1890
3282 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
3283 -6:00 - CST 1973 May
3284 -5:00 - EST 1975 Feb 16
3285 -6:00 Nic C%sT 1992 Jan 1 4:00
3286 -5:00 - EST 1992 Sep 24
3287 -6:00 - CST 1993
3288 -5:00 - EST 1997
3289 -6:00 Nic C%sT
3290
3291 # Panama
3292 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3293 Zone America/Panama -5:18:08 - LMT 1890
3294 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time
3295 -5:00 - EST
3296 Link America/Panama America/Cayman
3297
3298 # Puerto Rico
3299 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3300 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3301 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
3302 -4:00 - AST 1942 May 3
3303 -4:00 US A%sT 1946
3304 -4:00 - AST
3305
3306 # St Kitts-Nevis
3307 # St Lucia
3308 # See America/Port_of_Spain.
3309
3310 # St Pierre and Miquelon
3311 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3312 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3313 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
3314 -4:00 - AST 1980 May
3315 -3:00 - PMST 1987 # Pierre & Miquelon Time
3316 -3:00 Canada PM%sT
3317
3318 # St Vincent and the Grenadines
3319 # See America/Port_of_Spain.
3320
3321 # Turks and Caicos
3322 #
3323 # From Chris Dunn in
3324 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3325 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3326 # daylight saving dates for time changes have been adjusted to match
3327 # the recent U.S. change of dates.
3328 #
3329 # From Brian Inglis (2007-04-28):
3330 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3331 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3332 # rows before that there is an out of date entry for Oct:
3333 # "Eastern Standard Times Begins 2007
3334 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3335 # indicating that the normal ET rules are followed.
3336 #
3337 # From Paul Eggert (2014-08-19):
3338 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:
3339 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3340 # Model this as a switch from EST/EDT to AST ...
3341 # From Chris Walton (2014-11-04):
3342 # ... the TCI government appears to have delayed the switch to
3343 # "permanent daylight saving time" by one year....
3344 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3345 #
3346 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3347 Zone America/Grand_Turk -4:44:32 - LMT 1890
3348 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3349 -5:00 - EST 1979
3350 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3351 -4:00 - AST
3352
3353 # British Virgin Is
3354 # Virgin Is
3355 # See America/Port_of_Spain.
3356
3357
3358 # Local Variables:
3359 # coding: utf-8
3360 # End: