1 #
2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 #
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6 # published by the Free Software Foundation. Sun designates this
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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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 # CA 95054 USA or visit www.sun.com if you need additional information or
22 # have any questions.
23 #
24 # @(#)northamerica 8.24
25 # <pre>
26 # This file is in the public domain, so clarified as of
27 # 2009-05-17 by Arthur David Olson.
28
29 # also includes Central America and the Caribbean
30
31 # This data is by no means authoritative; if you think you know better,
32 # go ahead and edit the file (and please send any changes to
33 # tz@elsie.nci.nih.gov for general use in the future).
34
35 # From Paul Eggert (1999-03-22):
36 # A reliable and entertaining source about time zones is
37 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
38
39 ###############################################################################
40
41 # United States
42
43 # From Paul Eggert (1999-03-31):
44 # Howse writes (pp 121-125) that time zones were invented by
45 # Professor Charles Ferdinand Dowd (1825-1904),
46 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
47 # His pamphlet ``A System of National Time for Railroads'' (1870)
48 # was the result of his proposals at the Convention of Railroad Trunk Lines
49 # in New York City (1869-10). His 1870 proposal was based on Washington, DC,
50 # but in 1872-05 he moved the proposed origin to Greenwich.
51 # His proposal was adopted by the railroads on 1883-11-18 at 12:00,
52 # and the most of the country soon followed suit.
53
54 # From Paul Eggert (2005-04-16):
55 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
56 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
57
58 # From Paul Eggert (2006-03-22):
59 # A good source for time zone historical data in the US is
60 # Thomas G. Shanks, The American Atlas (5th edition),
61 # San Diego: ACS Publications, Inc. (1991).
62 # Make sure you have the errata sheet; the book is somewhat useless without it.
63 # It is the source for most of the pre-1991 US entries below.
64
65 # From Paul Eggert (2001-03-06):
66 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
67 # in his whimsical essay ``An Economical Project for Diminishing the Cost
68 # of Light'' published in the Journal de Paris (1784-04-26).
69 # Not everyone is happy with the results:
70 #
71 # I don't really care how time is reckoned so long as there is some
72 # agreement about it, but I object to being told that I am saving
73 # daylight when my reason tells me that I am doing nothing of the kind.
74 # I even object to the implication that I am wasting something
75 # valuable if I stay in bed after the sun has risen. As an admirer
76 # of moonlight I resent the bossy insistence of those who want to
77 # reduce my time for enjoying it. At the back of the Daylight Saving
78 # scheme I detect the bony, blue-fingered hand of Puritanism, eager
79 # to push people into bed earlier, and get them up earlier, to make
80 # them healthy, wealthy and wise in spite of themselves.
81 #
82 # -- Robertson Davies, The diary of Samuel Marchbanks,
83 # Clarke, Irwin (1947), XIX, Sunday
84 #
85 # For more about the first ten years of DST in the United States, see
86 # Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
87 # Ten years of daylight saving from the Pittsburgh standpoint
88 # (Carnegie Library of Pittsburgh, 1927)</a>.
89 #
90 # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
91 # However, DST was imposed by the Standard Time Act of 1918, which
92 # was the first nationwide legal time standard, and apparently
93 # time was just called "Standard Time" or "Daylight Saving Time".
94
95 # From Arthur David Olson:
96 # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
97 # See, for example, the front page of the Saturday, 1974-10-26
98 # and Sunday, 1974-10-27 editions of the Washington Post.
99
100 # From Arthur David Olson:
101 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
102 # Daylight Saving Time in the US was by local option, except during wartime.
103
104 # From Arthur David Olson (2000-09-25):
105 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
106 # In the introduction, Oboler spoke of "Eastern Peace Time."
107 # An AltaVista search turned up
108 # <a href="http://rowayton.org/rhs/hstaug45.html">:
109 # "When the time is announced over the radio now, it is 'Eastern Peace
110 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
111 # </a> (August 1945) by way of confirmation.
112
113 # From Joseph Gallant citing
114 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
115 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
116 # to switch to London for Attlee's address, but the American people
117 # never got to hear his speech live. According to one press account,
118 # CBS' Bob Trout was first to announce the word of Japan's surrender,
119 # but a few seconds later, NBC, ABC and Mutual also flashed the word
120 # of surrender, all of whom interrupting the bells of Big Ben in
121 # London which were to precede Mr. Attlee's speech.
122
123 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From
124 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
125 #
126 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
127 # Any announcement from Asia would reach St. John's New York newsroom on a
128 # wire service teletype machine, which had prescribed signals for major news.
129 # Associated Press, for example, would ring five bells before spewing out
130 # typed copy of an important story, and 10 bells for news "of transcendental
131 # importance."
132 #
133 # On Aug. 14, stalling while talking steadily into the NBC networks' open
134 # microphone, St. John heard five bells and waited only to hear a sixth bell,
135 # before announcing confidently: "Ladies and gentlemen, World War II is over.
136 # The Japanese have agreed to our surrender terms."
137 #
138 # He had scored a 20-second scoop on other broadcasters.
139
140 # From Arthur David Olson (2005-08-22):
141 # Paul has been careful to use the "US" rules only in those locations
142 # that are part of the United States; this reflects the real scope of
143 # U.S. government action. So even though the "US" rules have changed
144 # in the latest release, other countries won't be affected.
145
146 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
147 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
148 Rule US 1918 1919 - Oct lastSun 2:00 0 S
149 Rule US 1942 only - Feb 9 2:00 1:00 W # War
150 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
151 Rule US 1945 only - Sep 30 2:00 0 S
152 Rule US 1967 2006 - Oct lastSun 2:00 0 S
153 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
154 Rule US 1974 only - Jan 6 2:00 1:00 D
155 Rule US 1975 only - Feb 23 2:00 1:00 D
156 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
157 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
158 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
159 Rule US 2007 max - Nov Sun>=1 2:00 0 S
160
161 # From Arthur David Olson, 2005-12-19
162 # We generate the files specified below to guard against old files with
163 # obsolete information being left in the time zone binary directory.
164 # We limit the list to names that have appeared in previous versions of
165 # this time zone package.
166 # We do these as separate Zones rather than as Links to avoid problems if
167 # a particular place changes whether it observes DST.
168 # We put these specifications here in the northamerica file both to
169 # increase the chances that they'll actually get compiled and to
170 # avoid the need to duplicate the US rules in another file.
171
172 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
173 Zone EST -5:00 - EST
174 Zone MST -7:00 - MST
175 Zone HST -10:00 - HST
176 Zone EST5EDT -5:00 US E%sT
177 Zone CST6CDT -6:00 US C%sT
178 Zone MST7MDT -7:00 US M%sT
179 Zone PST8PDT -8:00 US P%sT
180
181 # From Bob Devine (1988-01-28):
182 # ...Alaska (and Hawaii) had the timezone names changed in 1967.
183 # old new
184 # Pacific Standard Time(PST) -same-
185 # Yukon Standard Time(YST) -same-
186 # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
187 # Nome Standard Time (NT) Bering Standard Time (BST)
188 #
189 # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
190 # The YST zone now covers nearly all of the state, AHST just part
191 # of the Aleutian islands. No DST.
192
193 # From Paul Eggert (1995-12-19):
194 # The tables below use `NST', not `NT', for Nome Standard Time.
195 # I invented `CAWT' for Central Alaska War Time.
196
197 # From U. S. Naval Observatory (1989-01-19):
198 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
199 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
200 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
201 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
202 # USA MOUNTAIN 7 H BEHIND UTC DENVER
203 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
204 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
205 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
206 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
207 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
208 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
209 # USA - " - 9 H BEHIND UTC APR 3 - OCT 30
210 # USA HAWAII 10 H BEHIND UTC
211 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
212
213 # From Arthur David Olson (1989-01-21):
214 # The above dates are for 1988.
215 # Note the "AKST" and "AKDT" abbreviations, the claim that there's
216 # no DST in Samoa, and the claim that there is DST in Alaska and the
217 # Aleutians.
218
219 # From Arthur David Olson (1988-02-13):
220 # Legal standard time zone names, from United States Code (1982 Edition and
221 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
222 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
223 # took effect), as explained in sections 263 and 261:
224 # (none)
225 # United States standard eastern time
226 # United States standard mountain time
227 # United States standard central time
228 # United States standard Pacific time
229 # (none)
230 # United States standard Alaska time
231 # (none)
232 # Next, names from 1967-04-01 until 1983-11-30 (the date for
233 # public law 98-181):
234 # Atlantic standard time
235 # eastern standard time
236 # central standard time
237 # mountain standard time
238 # Pacific standard time
239 # Yukon standard time
240 # Alaska-Hawaii standard time
241 # Bering standard time
242 # And after 1983-11-30:
243 # Atlantic standard time
244 # eastern standard time
245 # central standard time
246 # mountain standard time
247 # Pacific standard time
248 # Alaska standard time
249 # Hawaii-Aleutian standard time
250 # Samoa standard time
251 # The law doesn't give abbreviations.
252 #
253 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
254 # Public law 106-564 (2000-12-23) introduced the abbreviation
255 # "Chamorro Standard Time" for time in Guam and the Northern Marianas.
256 # See the file "australasia".
257
258 # From Arthur David Olson, 2005-08-09
259 # The following was signed into law on 2005-08-08.
260 #
261 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
262 # (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
263 # U.S.C. 260a(a)) is amended--
264 # (1) by striking `first Sunday of April' and inserting `second
265 # Sunday of March'; and
266 # (2) by striking `last Sunday of October' and inserting `first
267 # Sunday of November'.
268 # (b) Effective Date- Subsection (a) shall take effect 1 year after the
269 # date of enactment of this Act or March 1, 2007, whichever is later.
270 # (c) Report to Congress- Not later than 9 months after the effective
271 # date stated in subsection (b), the Secretary shall report to Congress
272 # on the impact of this section on energy consumption in the United
273 # States.
274 # (d) Right to Revert- Congress retains the right to revert the
275 # Daylight Saving Time back to the 2005 time schedules once the
276 # Department study is complete.
277
278 # US eastern time, represented by New York
279
280 # Connecticut, Delaware, District of Columbia, most of Florida,
281 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
282 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
283 # New Hampshire, New Jersey, New York, North Carolina, Ohio,
284 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
285 # Vermont, Virginia, West Virginia
286
287 # From Dave Cantor (2004-11-02):
288 # Early this summer I had the occasion to visit the Mount Washington
289 # Observatory weather station atop (of course!) Mount Washington [, NH]....
290 # One of the staff members said that the station was on Eastern Standard Time
291 # and didn't change their clocks for Daylight Saving ... so that their
292 # reports will always have times which are 5 hours behind UTC.
293
294 # From Paul Eggert (2005-08-26):
295 # According to today's Huntsville Times
296 # <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1>
297 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City
298 # in Russell County, Lanett in Chambers County and some towns in Lee County,
299 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
300 # Roberts, city administrator in Phenix City. as saying "We are in the Central
301 # time zone, but we do go by the Eastern time zone because so many people work
302 # in Columbus."
303
304 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
305 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
306 Rule NYC 1920 only - Oct lastSun 2:00 0 S
307 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
308 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
309 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
310 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
311 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
312 -5:00 US E%sT 1920
313 -5:00 NYC E%sT 1942
314 -5:00 US E%sT 1946
315 -5:00 NYC E%sT 1967
316 -5:00 US E%sT
317
318 # US central time, represented by Chicago
319
320 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
321 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
322 # Washington counties), Illinois, western Indiana
323 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
324 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
325 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
326 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
327 # western Tennessee, most of Texas, Wisconsin
328
329 # From Larry M. Smith (2006-04-26) re Wisconsin:
330 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
331 # is currently enforced at the 01:00 time of change. Because the local
332 # "bar time" in the state corresponds to 02:00, a number of citations
333 # are issued for the "sale of class 'B' alcohol after prohibited
334 # hours" within the deviated hour of this change every year....
335 #
336 # From Douglas R. Bomberg (2007-03-12):
337 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
338 # Statue 175 closer in synch with the US Congress' intent....
339 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
340
341 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
342 Rule Chicago 1920 only - Jun 13 2:00 1:00 D
343 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
344 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
345 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
346 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
347 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
348 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
349 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
350 -6:00 US C%sT 1920
351 -6:00 Chicago C%sT 1936 Mar 1 2:00
352 -5:00 - EST 1936 Nov 15 2:00
353 -6:00 Chicago C%sT 1942
354 -6:00 US C%sT 1946
355 -6:00 Chicago C%sT 1967
356 -6:00 US C%sT
357 # Oliver County, ND switched from mountain to central time on 1992-10-25.
358 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
359 -7:00 US M%sT 1992 Oct 25 02:00
360 -6:00 US C%sT
361 # Morton County, ND, switched from mountain to central time on
362 # 2003-10-26, except for the area around Mandan which was already central time.
363 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
364 # Officially this switch also included part of Sioux County, and
365 # Jones, Mellette, and Todd Counties in South Dakota;
366 # but in practice these other counties were already observing central time.
367 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
368 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
369 -7:00 US M%sT 2003 Oct 26 02:00
370 -6:00 US C%sT
371
372 # US mountain time, represented by Denver
373 #
374 # Colorado, far western Kansas, Montana, western
375 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
376 # New Mexico, southwestern North Dakota,
377 # western South Dakota, far western Texas (El Paso County, Hudspeth County,
378 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
379 #
380 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
381 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
382 Rule Denver 1920 only - Oct lastSun 2:00 0 S
383 Rule Denver 1921 only - May 22 2:00 0 S
384 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
385 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
386 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
387 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
388 -7:00 US M%sT 1920
389 -7:00 Denver M%sT 1942
390 -7:00 US M%sT 1946
391 -7:00 Denver M%sT 1967
392 -7:00 US M%sT
393
394 # US Pacific time, represented by Los Angeles
395 #
396 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
397 # Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties,
398 # and the northern three-quarters of Idaho county),
399 # most of Nevada, most of Oregon, and Washington
400 #
401 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
402 Rule CA 1948 only - Mar 14 2:00 1:00 D
403 Rule CA 1949 only - Jan 1 2:00 0 S
404 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
405 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
406 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
407 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
408 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
409 -8:00 US P%sT 1946
410 -8:00 CA P%sT 1967
411 -8:00 US P%sT
412
413 # Alaska
414 # AK%sT is the modern abbreviation for -9:00 per USNO.
415 #
416 # From Paul Eggert (2001-05-30):
417 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
418 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
419 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
420 # also a Friday. Include only the time zone part of this transition,
421 # ignoring the switch from Julian to Gregorian, since we can't represent
422 # the Julian calendar.
423 #
424 # As far as we know, none of the exact locations mentioned below were
425 # permanently inhabited in 1867 by anyone using either calendar.
426 # (Yakutat was colonized by the Russians in 1799, but the settlement
427 # was destroyed in 1805 by a Yakutat-kon war party.) However, there
428 # were nearby inhabitants in some cases and for our purposes perhaps
429 # it's best to simply use the official transition.
430 #
431 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
432 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
433 -8:57:41 - LMT 1900 Aug 20 12:00
434 -8:00 - PST 1942
435 -8:00 US P%sT 1946
436 -8:00 - PST 1969
437 -8:00 US P%sT 1983 Oct 30 2:00
438 -9:00 US Y%sT 1983 Nov 30
439 -9:00 US AK%sT
440 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
441 -9:18:55 - LMT 1900 Aug 20 12:00
442 -9:00 - YST 1942
443 -9:00 US Y%sT 1946
444 -9:00 - YST 1969
445 -9:00 US Y%sT 1983 Nov 30
446 -9:00 US AK%sT
447 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
448 -9:59:36 - LMT 1900 Aug 20 12:00
449 -10:00 - CAT 1942
450 -10:00 US CAT/CAWT 1945 Aug 14 23:00u
451 -10:00 US CAT/CAPT 1946 # Peace
452 -10:00 - CAT 1967 Apr
453 -10:00 - AHST 1969
454 -10:00 US AH%sT 1983 Oct 30 2:00
455 -9:00 US Y%sT 1983 Nov 30
456 -9:00 US AK%sT
457 Zone America/Nome 12:58:21 - LMT 1867 Oct 18
458 -11:01:38 - LMT 1900 Aug 20 12:00
459 -11:00 - NST 1942
460 -11:00 US N%sT 1946
461 -11:00 - NST 1967 Apr
462 -11:00 - BST 1969
463 -11:00 US B%sT 1983 Oct 30 2:00
464 -9:00 US Y%sT 1983 Nov 30
465 -9:00 US AK%sT
466 Zone America/Adak 12:13:21 - LMT 1867 Oct 18
467 -11:46:38 - LMT 1900 Aug 20 12:00
468 -11:00 - NST 1942
469 -11:00 US N%sT 1946
470 -11:00 - NST 1967 Apr
471 -11:00 - BST 1969
472 -11:00 US B%sT 1983 Oct 30 2:00
473 -10:00 US AH%sT 1983 Nov 30
474 -10:00 US HA%sT
475 # The following switches don't quite make our 1970 cutoff.
476 #
477 # Shanks writes that part of southwest Alaska (e.g. Aniak)
478 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
479 # and another part (e.g. Akiak) made the same switch five weeks later.
480 #
481 # From David Flater (2004-11-09):
482 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
483 # Historic Preservation Commission, provided this information, which
484 # suggests that Unalaska deviated from statutory time from early 1967
485 # possibly until 1983:
486 #
487 # Minutes of the Unalaska City Council Meeting, January 10, 1967:
488 # "Except for St. Paul and Akutan, Unalaska is the only important
489 # location not on Alaska Standard Time. The following resolution was
490 # made by William Robinson and seconded by Henry Swanson: Be it
491 # resolved that the City of Unalaska hereby goes to Alaska Standard
492 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
493 # January 14, Alaska Standard Time.) This resolution was passed with
494 # three votes for and one against."
495
496 # Hawaii
497 #
498 # From Arthur David Olson:
499 # And then there's Hawaii.
500 # DST was observed for one day in 1933;
501 # standard time was changed by half an hour in 1947;
502 # it's always standard as of 1986.
503 #
504 # From Paul Eggert:
505 # Shanks says the 1933 experiment lasted for three weeks. Go with Shanks.
506 #
507 Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00
508 -10:30 - HST 1933 Apr 30 2:00
509 -10:30 1:00 HDT 1933 May 21 2:00
510 -10:30 US H%sT 1947 Jun 8 2:00
511 -10:00 - HST
512
513 # Now we turn to US areas that have diverged from the consensus since 1970.
514
515 # Arizona mostly uses MST.
516
517 # From Paul Eggert (2002-10-20):
518 #
519 # The information in the rest of this paragraph is derived from the
520 # <a href="http://www.dlapr.lib.az.us/links/daylight.htm">
521 # Daylight Saving Time web page (2002-01-23)</a> maintained by the
522 # Arizona State Library, Archives and Public Records.
523 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
524 # time, but by federal law railroads, airlines, bus lines, military
525 # personnel, and some engaged in interstate commerce continued to
526 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
527 # Gazette says that was the date the law changed, and that 04-01 was
528 # the date the state's clocks would change. In 1945 the State of
529 # Arizona used standard time all year, again with exceptions only as
530 # mandated by federal law. Arizona observed DST in 1967, but Arizona
531 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
532 #
533 # Shanks says the 1944 experiment came to an end on 1944-03-17.
534 # Go with the Arizona State Library instead.
535
536 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42
537 -7:00 US M%sT 1944 Jan 1 00:01
538 -7:00 - MST 1944 Apr 1 00:01
539 -7:00 US M%sT 1944 Oct 1 00:01
540 -7:00 - MST 1967
541 -7:00 US M%sT 1968 Mar 21
542 -7:00 - MST
543 # From Arthur David Olson (1988-02-13):
544 # A writer from the Inter Tribal Council of Arizona, Inc.,
545 # notes in private correspondence dated 1987-12-28 that "Presently, only the
546 # Navajo Nation participates in the Daylight Saving Time policy, due to its
547 # large size and location in three states." (The "only" means that other
548 # tribal nations don't use DST.)
549
550 Link America/Denver America/Shiprock
551
552 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
553 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
554 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
555 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
556 # Teton, Twin Falls, Valley, Washington counties, and the southern
557 # quarter of Idaho county) and eastern Oregon (most of Malheur County)
558 # switched four weeks late in 1974.
559 #
560 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
561 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
562 -8:00 US P%sT 1923 May 13 2:00
563 -7:00 US M%sT 1974
564 -7:00 - MST 1974 Feb 3 2:00
565 -7:00 US M%sT
566
567 # Indiana
568 #
569 # For a map of Indiana's time zone regions, see:
570 # <a href="http://www.mccsc.edu/time.html">
571 # What time is it in Indiana?
572 # </a> (2006-03-01)
573 #
574 # From Paul Eggert (2007-08-17):
575 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
576 # with the following exceptions:
577 #
578 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
579 # Vandenburgh, and Warrick counties have been like America/Chicago.
580 #
581 # - Dearborn and Ohio counties have been like America/New_York.
582 #
583 # - Clark, Floyd, and Harrison counties have been like
584 # America/Kentucky/Louisville.
585 #
586 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
587 # and Switzerland counties have their own time zone histories as noted below.
588 #
589 # Shanks partitioned Indiana into 345 regions, each with its own time history,
590 # and wrote ``Even newspaper reports present contradictory information.''
591 # Those Hoosiers! Such a flighty and changeable people!
592 # Fortunately, most of the complexity occurred before our cutoff date of 1970.
593 #
594 # Other than Indianapolis, the Indiana place names are so nondescript
595 # that they would be ambiguous if we left them at the `America' level.
596 # So we reluctantly put them all in a subdirectory `America/Indiana'.
597
598 # From Paul Eggert (2005-08-16):
599 # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.
600
601 # From Nathan Stratton Treadway (2006-03-30):
602 # http://www.dot.gov/affairs/dot0406.htm [3705 B]
603 # From Deborah Goldsmith (2006-01-18):
604 # http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]
605 # From Paul Eggert (2006-01-20):
606 # It says "DOT is relocating the time zone boundary in Indiana to move Starke,
607 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
608 # Eastern Time Zone to the Central Time Zone.... The effective date of
609 # this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the
610 # changeover date from standard time to Daylight Saving Time."
611 # Strictly speaking, this means the affected counties will change their
612 # clocks twice that night, but this obviously is in error. The intent
613 # is that 01:59:59 EST be followed by 02:00:00 CDT.
614
615 # From Gwillim Law (2007-02-10):
616 # The Associated Press has been reporting that Pulaski County, Indiana is
617 # going to switch from Central to Eastern Time on March 11, 2007....
618 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
619
620 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
621 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
622 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
623 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
624 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
625 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
626 -6:00 US C%sT 1920
627 -6:00 Indianapolis C%sT 1942
628 -6:00 US C%sT 1946
629 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
630 -5:00 - EST 1957 Sep 29 2:00
631 -6:00 - CST 1958 Apr 27 2:00
632 -5:00 - EST 1969
633 -5:00 US E%sT 1971
634 -5:00 - EST 2006
635 -5:00 US E%sT
636 #
637 # Eastern Crawford County, Indiana, left its clocks alone in 1974,
638 # as well as from 1976 through 2005.
639 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
640 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
641 Rule Marengo 1951 only - Sep lastSun 2:00 0 S
642 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
643 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
644 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
645 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
646 -6:00 US C%sT 1951
647 -6:00 Marengo C%sT 1961 Apr 30 2:00
648 -5:00 - EST 1969
649 -5:00 US E%sT 1974 Jan 6 2:00
650 -6:00 1:00 CDT 1974 Oct 27 2:00
651 -5:00 US E%sT 1976
652 -5:00 - EST 2006
653 -5:00 US E%sT
654 #
655 # Daviess, Dubois, Knox, and Martin Counties, Indiana,
656 # switched from eastern to central time in April 2006, then switched back
657 # in November 2007.
658 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
659 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
660 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
661 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
662 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
663 Rule Vincennes 1955 only - May 1 0:00 1:00 D
664 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
665 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
666 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
667 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
668 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
669 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
670 -6:00 US C%sT 1946
671 -6:00 Vincennes C%sT 1964 Apr 26 2:00
672 -5:00 - EST 1969
673 -5:00 US E%sT 1971
674 -5:00 - EST 2006 Apr 2 2:00
675 -6:00 US C%sT 2007 Nov 4 2:00
676 -5:00 US E%sT
677 #
678 # Perry County, Indiana, switched from eastern to central time in April 2006.
679 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
680 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D
681 Rule Perry 1946 only - Sep lastSun 2:00 0 S
682 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D
683 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S
684 Rule Perry 1955 only - May 1 0:00 1:00 D
685 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
686 Rule Perry 1960 only - Oct lastSun 2:00 0 S
687 Rule Perry 1961 only - Sep lastSun 2:00 0 S
688 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S
689 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
690 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57
691 -6:00 US C%sT 1946
692 -6:00 Perry C%sT 1964 Apr 26 2:00
693 -5:00 - EST 1969
694 -5:00 US E%sT 1971
695 -5:00 - EST 2006 Apr 2 2:00
696 -6:00 US C%sT
697 #
698 # Pike County, Indiana moved from central to eastern time in 1977,
699 # then switched back in 2006, then switched back again in 2007.
700 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
701 Rule Pike 1955 only - May 1 0:00 1:00 D
702 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
703 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
704 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
705 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
706 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
707 -6:00 US C%sT 1955
708 -6:00 Pike C%sT 1965 Apr 25 2:00
709 -5:00 - EST 1966 Oct 30 2:00
710 -6:00 US C%sT 1977 Oct 30 2:00
711 -5:00 - EST 2006 Apr 2 2:00
712 -6:00 US C%sT 2007 Nov 4 2:00
713 -5:00 US E%sT
714 #
715 # Starke County, Indiana moved from central to eastern time in 1991,
716 # then switched back in 2006.
717 # From Arthur David Olson (1991-10-28):
718 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
719 # notes that Starke County switched from Central time to Eastern time as of
720 # 1991-10-27.
721 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
722 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
723 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
724 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
725 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
726 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
727 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
728 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
729 -6:00 US C%sT 1947
730 -6:00 Starke C%sT 1962 Apr 29 2:00
731 -5:00 - EST 1963 Oct 27 2:00
732 -6:00 US C%sT 1991 Oct 27 2:00
733 -5:00 - EST 2006 Apr 2 2:00
734 -6:00 US C%sT
735 #
736 # Pulaski County, Indiana, switched from eastern to central time in
737 # April 2006 and then switched back in March 2007.
738 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
739 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
740 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
741 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
742 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
743 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
744 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35
745 -6:00 US C%sT 1946
746 -6:00 Pulaski C%sT 1961 Apr 30 2:00
747 -5:00 - EST 1969
748 -5:00 US E%sT 1971
749 -5:00 - EST 2006 Apr 2 2:00
750 -6:00 US C%sT 2007 Mar 11 2:00
751 -5:00 US E%sT
752 #
753 # Switzerland County, Indiana, did not observe DST from 1973 through 2005.
754 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
755 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
756 -6:00 US C%sT 1954 Apr 25 2:00
757 -5:00 - EST 1969
758 -5:00 US E%sT 1973
759 -5:00 - EST 2006
760 -5:00 US E%sT
761
762 # Part of Kentucky left its clocks alone in 1974.
763 # This also includes Clark, Floyd, and Harrison counties in Indiana.
764 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
765 Rule Louisville 1921 only - May 1 2:00 1:00 D
766 Rule Louisville 1921 only - Sep 1 2:00 0 S
767 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
768 Rule Louisville 1941 only - Sep lastSun 2:00 0 S
769 Rule Louisville 1946 only - Jun 2 2:00 0 S
770 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
771 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
772 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
773 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
774 -6:00 US C%sT 1921
775 -6:00 Louisville C%sT 1942
776 -6:00 US C%sT 1946
777 -6:00 Louisville C%sT 1961 Jul 23 2:00
778 -5:00 - EST 1968
779 -5:00 US E%sT 1974 Jan 6 2:00
780 -6:00 1:00 CDT 1974 Oct 27 2:00
781 -5:00 US E%sT
782 #
783 # Wayne County, Kentucky
784 #
785 # From
786 # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
787 # Lake Cumberland LIFE
788 # </a> (1999-01-29) via WKYM-101.7:
789 # Clinton County has joined Wayne County in asking the DoT to change from
790 # the Central to the Eastern time zone.... The Wayne County government made
791 # the same request in December. And while Russell County officials have not
792 # taken action, the majority of respondents to a poll conducted there in
793 # August indicated they would like to change to "fast time" also.
794 # The three Lake Cumberland counties are the farthest east of any U.S.
795 # location in the Central time zone.
796 #
797 # From Rich Wales (2000-08-29):
798 # After prolonged debate, and despite continuing deep differences of opinion,
799 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
800 # (-0500) time. They won't "fall back" this year. See Sara Shipley,
801 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
802 #
803 # From Paul Eggert (2001-07-16):
804 # The final rule was published in the
805 # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
806 # Federal Register 65, 160 (2000-08-17), page 50154-50158.
807 # </a>
808 #
809 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
810 -6:00 US C%sT 1946
811 -6:00 - CST 1968
812 -6:00 US C%sT 2000 Oct 29 2:00
813 -5:00 US E%sT
814
815
816 # From Rives McDow (2000-08-30):
817 # Here ... are all the changes in the US since 1985.
818 # Kearny County, KS (put all of county on central;
819 # previously split between MST and CST) ... 1990-10
820 # Starke County, IN (from CST to EST) ... 1991-10
821 # Oliver County, ND (from MST to CST) ... 1992-10
822 # West Wendover, NV (from PST TO MST) ... 1999-10
823 # Wayne County, KY (from CST to EST) ... 2000-10
824 #
825 # From Paul Eggert (2001-07-17):
826 # We don't know where the line used to be within Kearny County, KS,
827 # so omit that change for now.
828 # See America/Indiana/Knox for the Starke County, IN change.
829 # See America/North_Dakota/Center for the Oliver County, ND change.
830 # West Wendover, NV officially switched from Pacific to mountain time on
831 # 1999-10-31. See the
832 # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
833 # Federal Register 64, 203 (1999-10-21), page 56705-56707.
834 # </a>
835 # However, the Federal Register says that West Wendover already operated
836 # on mountain time, and the rule merely made this official;
837 # hence a separate tz entry is not needed.
838
839 # Michigan
840 #
841 # From Bob Devine (1988-01-28):
842 # Michigan didn't observe DST from 1968 to 1973.
843 #
844 # From Paul Eggert (1999-03-31):
845 # Shanks writes that Michigan started using standard time on 1885-09-18,
846 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
847 # that Detroit kept
848 #
849 # local time until 1900 when the City Council decreed that clocks should
850 # be put back twenty-eight minutes to Central Standard Time. Half the
851 # city obeyed, half refused. After considerable debate, the decision
852 # was rescinded and the city reverted to Sun time. A derisive offer to
853 # erect a sundial in front of the city hall was referred to the
854 # Committee on Sewers. Then, in 1905, Central time was adopted
855 # by city vote.
856 #
857 # This story is too entertaining to be false, so go with Howse over Shanks.
858 #
859 # From Paul Eggert (2001-03-06):
860 # Garland (1927) writes ``Cleveland and Detroit advanced their clocks
861 # one hour in 1914.'' This change is not in Shanks. We have no more
862 # info, so omit this for now.
863 #
864 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
865 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
866 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
867 Rule Detroit 1948 only - Sep lastSun 2:00 0 S
868 Rule Detroit 1967 only - Jun 14 2:00 1:00 D
869 Rule Detroit 1967 only - Oct lastSun 2:00 0 S
870 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
871 Zone America/Detroit -5:32:11 - LMT 1905
872 -6:00 - CST 1915 May 15 2:00
873 -5:00 - EST 1942
874 -5:00 US E%sT 1946
875 -5:00 Detroit E%sT 1973
876 -5:00 US E%sT 1975
877 -5:00 - EST 1975 Apr 27 2:00
878 -5:00 US E%sT
879 #
880 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
881 # switched from EST to CST/CDT in 1973.
882 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
883 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
884 Rule Menominee 1946 only - Sep lastSun 2:00 0 S
885 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
886 Rule Menominee 1966 only - Oct lastSun 2:00 0 S
887 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
888 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
889 -6:00 US C%sT 1946
890 -6:00 Menominee C%sT 1969 Apr 27 2:00
891 -5:00 - EST 1973 Apr 29 2:00
892 -6:00 US C%sT
893
894 # Navassa
895 # administered by the US Fish and Wildlife Service
896 # claimed by US under the provisions of the 1856 Guano Islands Act
897 # also claimed by Haiti
898 # occupied 1857/1900 by the Navassa Phosphate Co
899 # US lighthouse 1917/1996-09
900 # currently uninhabited
901 # see Mark Fineman, ``An Isle Rich in Guano and Discord'',
902 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
903 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
904
905 ################################################################################
906
907
908 # From Paul Eggert (2006-03-22):
909 # A good source for time zone historical data outside the U.S. is
910 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
911 # San Diego: ACS Publications, Inc. (2003).
912 #
913 # Gwillim Law writes that a good source
914 # for recent time zone data is the International Air Transport
915 # Association's Standard Schedules Information Manual (IATA SSIM),
916 # published semiannually. Law sent in several helpful summaries
917 # of the IATA's data after 1990.
918 #
919 # Except where otherwise noted, Shanks & Pottenger is the source for
920 # entries through 1990, and IATA SSIM is the source for entries afterwards.
921 #
922 # Other sources occasionally used include:
923 #
924 # Edward W. Whitman, World Time Differences,
925 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
926 # which I found in the UCLA library.
927 #
928 # <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
929 # William Willett, The Waste of Daylight, 19th edition
930 # </a> (1914-03)
931 #
932 # See the `europe' file for Greenland.
933
934 # Canada
935
936 # From Alain LaBont<e'> (1994-11-14):
937 # I post here the time zone abbreviations standardized in Canada
938 # for both English and French in the CAN/CSA-Z234.4-89 standard....
939 #
940 # UTC Standard time Daylight savings time
941 # offset French English French English
942 # -2:30 - - HAT NDT
943 # -3 - - HAA ADT
944 # -3:30 HNT NST - -
945 # -4 HNA AST HAE EDT
946 # -5 HNE EST HAC CDT
947 # -6 HNC CST HAR MDT
948 # -7 HNR MST HAP PDT
949 # -8 HNP PST HAY YDT
950 # -9 HNY YST - -
951 #
952 # HN: Heure Normale ST: Standard Time
953 # HA: Heure Avanc<e'>e DT: Daylight saving Time
954 #
955 # A: de l'Atlantique Atlantic
956 # C: du Centre Central
957 # E: de l'Est Eastern
958 # M: Mountain
959 # N: Newfoundland
960 # P: du Pacifique Pacific
961 # R: des Rocheuses
962 # T: de Terre-Neuve
963 # Y: du Yukon Yukon
964 #
965 # From Paul Eggert (1994-11-22):
966 # Alas, this sort of thing must be handled by localization software.
967
968 # Unless otherwise specified, the data for Canada are all from Shanks
969 # & Pottenger.
970
971 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
972 # 2007-03-01):
973 # The British Columbia government announced yesterday that it will
974 # adjust daylight savings next year to align with changes in the
975 # U.S. and the rest of Canada....
976 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
977 # ...
978 # Nova Scotia
979 # Daylight saving time will be extended by four weeks starting in 2007....
980 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
981 #
982 # [For New Brunswick] the new legislation dictates that the time change is to
983 # be done at 02:00 instead of 00:01.
984 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
985 # ...
986 # Manitoba has traditionally changed the clock every fall at 03:00.
987 # As of 2006, the transition is to take place one hour earlier at 02:00.
988 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
989 # ...
990 # [Alberta, Ontario, Quebec] will follow US rules.
991 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
992 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
993 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
994 # ...
995 # P.E.I. will follow US rules....
996 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
997 # ...
998 # Province of Newfoundland and Labrador....
999 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1000 # ...
1001 # Yukon
1002 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1003 # ...
1004 # N.W.T. will follow US rules. Whoever maintains the government web site
1005 # does not seem to believe in bookmarks. To see the news release, click the
1006 # following link and search for "Daylight Savings Time Change". Press the
1007 # "Daylight Savings Time Change" link; it will fire off a popup using
1008 # JavaScript.
1009 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1010 # ...
1011 # Nunavut
1012 # An amendment to the Interpretation Act was registered on February 19/2007....
1013 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1014
1015 # From Paul Eggert (2006-04-25):
1016 # H. David Matthews and Mary Vincent's map
1017 # <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">
1018 # "It's about TIME", _Canadian Geographic_ (September-October 1998)
1019 # </a> contains detailed boundaries for regions observing nonstandard
1020 # time and daylight saving time arrangements in Canada circa 1998.
1021 #
1022 # INMS, the Institute for National Measurement Standards in Ottawa, has <a
1023 # href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">
1024 # information about standard and daylight saving time zones in Canada.
1025 # </a> (updated periodically).
1026 # Its unofficial information is often taken from Matthews and Vincent.
1027
1028 # From Paul Eggert (2006-06-27):
1029 # For now, assume all of DST-observing Canada will fall into line with the
1030 # new US DST rules,
1031
1032 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1033 Rule Canada 1918 only - Apr 14 2:00 1:00 D
1034 Rule Canada 1918 only - Oct 31 2:00 0 S
1035 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
1036 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
1037 Rule Canada 1945 only - Sep 30 2:00 0 S
1038 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
1039 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1040 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1041 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1042 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
1043
1044
1045 # Newfoundland and Labrador
1046
1047 # From Paul Eggert (2000-10-02):
1048 # Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1049 # but the only part of Labrador that follows the rules is the
1050 # southeast corner, including Port Hope Simpson and Mary's Harbour,
1051 # but excluding, say, Black Tickle.
1052
1053 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1054 Rule StJohns 1917 only - Apr 8 2:00 1:00 D
1055 Rule StJohns 1917 only - Sep 17 2:00 0 S
1056 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1057 Rule StJohns 1919 only - May 5 23:00 1:00 D
1058 Rule StJohns 1919 only - Aug 12 23:00 0 S
1059 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1060 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
1061 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
1062 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1063 # Pottenger.
1064 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
1065 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
1066 # Whitman gives the following transitions:
1067 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1068 # but go with Shanks & Pottenger and assume they used Canadian rules.
1069 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1070 # Apr 30 - Sep 24; go with Shanks & Pottenger.
1071 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
1072 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
1073 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
1074 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
1075 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
1076 # From Paul Eggert (2000-10-02):
1077 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1078 # at 00:01 local time. For now, assume it started in 1987.
1079 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
1080 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
1081 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
1082 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1083 Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D
1084 Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S
1085 #
1086 # St John's has an apostrophe, but Posix file names can't have apostrophes.
1087 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1088 Zone America/St_Johns -3:30:52 - LMT 1884
1089 -3:30:52 StJohns N%sT 1918
1090 -3:30:52 Canada N%sT 1919
1091 -3:30:52 StJohns N%sT 1935 Mar 30
1092 -3:30 StJohns N%sT 1942 May 11
1093 -3:30 Canada N%sT 1946
1094 -3:30 StJohns N%sT
1095
1096 # most of east Labrador
1097
1098 # The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
1099 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1100 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1101 -3:30:52 - NST 1918
1102 -3:30:52 Canada N%sT 1919
1103 -3:30:52 - NST 1935 Mar 30
1104 -3:30 - NST 1936
1105 -3:30 StJohns N%sT 1942 May 11
1106 -3:30 Canada N%sT 1946
1107 -3:30 StJohns N%sT 1966 Mar 15 2:00
1108 -4:00 StJohns A%sT
1109
1110
1111 # west Labrador, Nova Scotia, Prince Edward I
1112
1113 # From Paul Eggert (2006-03-22):
1114 # Shanks & Pottenger write that since 1970 most of this region has been like
1115 # Halifax. Many locales did not observe peacetime DST until 1972;
1116 # Glace Bay, NS is the largest that we know of.
1117 # Shanks & Pottenger also write that Liverpool, NS was the only town
1118 # in Canada to observe DST in 1971 but not 1970; for now we'll assume
1119 # this is a typo.
1120
1121 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1122 Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1123 Rule Halifax 1916 only - Oct 1 0:00 0 S
1124 Rule Halifax 1920 only - May 9 0:00 1:00 D
1125 Rule Halifax 1920 only - Aug 29 0:00 0 S
1126 Rule Halifax 1921 only - May 6 0:00 1:00 D
1127 Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1128 Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1129 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1130 Rule Halifax 1923 only - Sep 4 0:00 0 S
1131 Rule Halifax 1924 only - Sep 15 0:00 0 S
1132 Rule Halifax 1925 only - Sep 28 0:00 0 S
1133 Rule Halifax 1926 only - May 16 0:00 1:00 D
1134 Rule Halifax 1926 only - Sep 13 0:00 0 S
1135 Rule Halifax 1927 only - May 1 0:00 1:00 D
1136 Rule Halifax 1927 only - Sep 26 0:00 0 S
1137 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
1138 Rule Halifax 1928 only - Sep 9 0:00 0 S
1139 Rule Halifax 1929 only - Sep 3 0:00 0 S
1140 Rule Halifax 1930 only - Sep 15 0:00 0 S
1141 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
1142 Rule Halifax 1932 only - May 1 0:00 1:00 D
1143 Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1144 Rule Halifax 1933 only - Oct 2 0:00 0 S
1145 Rule Halifax 1934 only - May 20 0:00 1:00 D
1146 Rule Halifax 1934 only - Sep 16 0:00 0 S
1147 Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1148 Rule Halifax 1935 only - Sep 30 0:00 0 S
1149 Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1150 Rule Halifax 1936 only - Sep 14 0:00 0 S
1151 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1152 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1153 Rule Halifax 1939 only - May 28 0:00 1:00 D
1154 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1155 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1156 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1157 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1158 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1159 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1160 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1161 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1162 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
1163 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1164 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
1165 -4:00 Halifax A%sT 1918
1166 -4:00 Canada A%sT 1919
1167 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1168 -4:00 Canada A%sT 1946
1169 -4:00 Halifax A%sT 1974
1170 -4:00 Canada A%sT
1171 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1172 -4:00 Canada A%sT 1953
1173 -4:00 Halifax A%sT 1954
1174 -4:00 - AST 1972
1175 -4:00 Halifax A%sT 1974
1176 -4:00 Canada A%sT
1177
1178 # New Brunswick
1179
1180 # From Paul Eggert (2007-01-31):
1181 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1182 # says they changed at 00:01 through 2006, and
1183 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1184 # clear that this was the case since at least 1993.
1185 # For now, assume it started in 1993.
1186
1187 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1188 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1189 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1190 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1191 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1192 Rule Moncton 1939 only - May 27 1:00 1:00 D
1193 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1194 Rule Moncton 1940 only - May 19 1:00 1:00 D
1195 Rule Moncton 1941 only - May 4 1:00 1:00 D
1196 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1197 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1198 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1199 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1200 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1201 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1202 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1203 -5:00 - EST 1902 Jun 15
1204 -4:00 Canada A%sT 1933
1205 -4:00 Moncton A%sT 1942
1206 -4:00 Canada A%sT 1946
1207 -4:00 Moncton A%sT 1973
1208 -4:00 Canada A%sT 1993
1209 -4:00 Moncton A%sT 2007
1210 -4:00 Canada A%sT
1211
1212 # Quebec
1213
1214 # From Paul Eggert (2006-07-09):
1215 # Shanks & Pottenger write that since 1970 most of Quebec has been
1216 # like Montreal.
1217
1218 # From Paul Eggert (2006-06-27):
1219 # Matthews and Vincent (1998) also write that Quebec east of the -63
1220 # meridian is supposed to observe AST, but residents as far east as
1221 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1222 # In "Official time in Quebec" the Quebec department of justice writes in
1223 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm
1224 # that "The residents of the Municipality of the
1225 # Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin,
1226 # Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is
1227 # written and use Atlantic standard time all year round. The same applies to
1228 # the residents of the Native facilities along the lower North Shore."
1229 # <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm>
1230 # says this common practice was codified into law as of 2007.
1231 # For lack of better info, guess this practice began around 1970, contra to
1232 # Shanks & Pottenger who have this region observing AST/ADT.
1233
1234 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1235 Rule Mont 1917 only - Mar 25 2:00 1:00 D
1236 Rule Mont 1917 only - Apr 24 0:00 0 S
1237 Rule Mont 1919 only - Mar 31 2:30 1:00 D
1238 Rule Mont 1919 only - Oct 25 2:30 0 S
1239 Rule Mont 1920 only - May 2 2:30 1:00 D
1240 Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S
1241 Rule Mont 1921 only - May 1 2:00 1:00 D
1242 Rule Mont 1922 only - Apr 30 2:00 1:00 D
1243 Rule Mont 1924 only - May 17 2:00 1:00 D
1244 Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
1245 Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
1246 # The 1927-to-1937 rules can be expressed more simply as
1247 # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D
1248 # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S
1249 # The rules below avoid use of 24:00
1250 # (which pre-1998 versions of zic cannot handle).
1251 Rule Mont 1927 only - May 1 0:00 1:00 D
1252 Rule Mont 1927 1932 - Sep lastSun 0:00 0 S
1253 Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D
1254 Rule Mont 1932 only - May 1 0:00 1:00 D
1255 Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D
1256 Rule Mont 1933 only - Oct 1 0:00 0 S
1257 Rule Mont 1934 1939 - Sep lastSun 0:00 0 S
1258 Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D
1259 Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
1260 Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
1261 Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
1262 Rule Mont 1957 1973 - Oct lastSun 2:00 0 S
1263
1264 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1265 Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1266 -4:00 Canada A%sT 1970
1267 -4:00 - AST
1268 Zone America/Montreal -4:54:16 - LMT 1884
1269 -5:00 Mont E%sT 1918
1270 -5:00 Canada E%sT 1919
1271 -5:00 Mont E%sT 1942 Feb 9 2:00s
1272 -5:00 Canada E%sT 1946
1273 -5:00 Mont E%sT 1974
1274 -5:00 Canada E%sT
1275
1276
1277 # Ontario
1278
1279 # From Paul Eggert (2006-07-09):
1280 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1281 # Toronto.
1282 # Thunder Bay skipped DST in 1973.
1283 # Many smaller locales did not observe peacetime DST until 1974;
1284 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1285 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1286
1287 # From Mark Brader (2003-07-26):
1288 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1289 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1290 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1291 # have already done so. In Orillia DST was to run until Saturday,
1292 # 1912-08-31 (no time mentioned), but it was met with considerable
1293 # hostility from certain segments of the public, and was revoked after
1294 # only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but
1295 # presumably that should be -07-06. (1912-06-19, -07-12; also letters
1296 # earlier in June).
1297 #
1298 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1299
1300 # From Paul Eggert (1997-10-17):
1301 # Mark Brader writes that an article in the 1997-10-14 Toronto Star
1302 # says that Atikokan, Ontario currently does not observe DST,
1303 # but will vote on 11-10 whether to use EST/EDT.
1304 # He also writes that the
1305 # <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
1306 # Ontario Time Act (1990, Chapter T.9)
1307 # </a>
1308 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1309 # Officially Atikokan is therefore on CST/CDT, and most likely this report
1310 # concerns a non-official time observed as a matter of local practice.
1311 #
1312 # From Paul Eggert (2000-10-02):
1313 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1314 # New Osnaburgh observe CST all year, that Big Trout Lake observes
1315 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1316 # violation of the official Ontario rules.
1317 #
1318 # From Paul Eggert (2006-07-09):
1319 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1320 # 2005-07-21 Chronicle-Journal, which said:
1321 #
1322 # The clocks in Atikokan stay set on standard time year-round.
1323 # This means they spend about half the time on central time and
1324 # the other half on eastern time.
1325 #
1326 # For the most part, the system works, Mayor Dennis Brown said.
1327 #
1328 # "The majority of businesses in Atikokan deal more with Eastern
1329 # Canada, but there are some that deal with Western Canada," he
1330 # said. "I don't see any changes happening here."
1331 #
1332 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1333 # [New Osnaburgh] follow the same practice."
1334
1335 # From Garry McKinnon (2006-07-14) via Chris Walton:
1336 # I chatted with a member of my board who has an outstanding memory
1337 # and a long history in Atikokan (and in the telecom industry) and he
1338 # can say for certain that Atikokan has been practicing the current
1339 # time keeping since 1952, at least.
1340
1341 # From Paul Eggert (2006-07-17):
1342 # Shanks & Pottenger say that Atikokan has agreed with Rainy River
1343 # ever since standard time was introduced, but the information from
1344 # McKinnon sounds more authoritative. For now, assume that Atikokan
1345 # switched to EST immediately after WWII era daylight saving time
1346 # ended. This matches the old (less-populous) America/Coral_Harbour
1347 # entry since our cutoff date of 1970, so we can move
1348 # America/Coral_Harbour to the 'backward' file.
1349
1350 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1351 Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1352 Rule Toronto 1919 only - Oct 26 0:00 0 S
1353 Rule Toronto 1920 only - May 2 2:00 1:00 D
1354 Rule Toronto 1920 only - Sep 26 0:00 0 S
1355 Rule Toronto 1921 only - May 15 2:00 1:00 D
1356 Rule Toronto 1921 only - Sep 15 2:00 0 S
1357 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
1358 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1359 # was meant.
1360 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1361 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1362 # The 1927-to-1939 rules can be expressed more simply as
1363 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1364 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1365 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1366 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1367 # The rules below avoid use of Sun>=25
1368 # (which pre-2004 versions of zic cannot handle).
1369 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S
1370 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D
1371 Rule Toronto 1932 only - May 1 2:00 1:00 D
1372 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D
1373 Rule Toronto 1933 only - Oct 1 2:00 0 S
1374 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S
1375 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
1376 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
1377 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
1378 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S
1379 Rule Toronto 1949 only - Nov lastSun 0:00 0 S
1380 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
1381 Rule Toronto 1950 only - Nov lastSun 2:00 0 S
1382 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
1383 # Shanks & Pottenger say Toronto ended DST a week early in 1971,
1384 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1385 # is wrong, and that he had confirmed it by checking the 1971-10-30
1386 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1387 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1388
1389 # From Paul Eggert (2003-07-27):
1390 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1391 # Port Arthur, Ontario, the principle of the Bill has been in
1392 # operation for the past three years, and in the City of Moose Jaw,
1393 # Saskatchewan, for one year."
1394
1395 # From David Bryan via Tory Tronrud, Director/Curator,
1396 # Thunder Bay Museum (2003-11-12):
1397 # There is some suggestion, however, that, by-law or not, daylight
1398 # savings time was being practiced in Fort William and Port Arthur
1399 # before 1909.... [I]n 1910, the line between the Eastern and Central
1400 # Time Zones was permanently moved about two hundred miles west to
1401 # include the Thunder Bay area.... When Canada adopted daylight
1402 # savings time in 1916, Fort William and Port Arthur, having done so
1403 # already, did not change their clocks.... During the Second World
1404 # War,... [t]he cities agreed to implement DST during the summer
1405 # months for the remainder of the war years.
1406
1407 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1408 Zone America/Toronto -5:17:32 - LMT 1895
1409 -5:00 Canada E%sT 1919
1410 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1411 -5:00 Canada E%sT 1946
1412 -5:00 Toronto E%sT 1974
1413 -5:00 Canada E%sT
1414 Zone America/Thunder_Bay -5:57:00 - LMT 1895
1415 -6:00 - CST 1910
1416 -5:00 - EST 1942
1417 -5:00 Canada E%sT 1970
1418 -5:00 Mont E%sT 1973
1419 -5:00 - EST 1974
1420 -5:00 Canada E%sT
1421 Zone America/Nipigon -5:53:04 - LMT 1895
1422 -5:00 Canada E%sT 1940 Sep 29
1423 -5:00 1:00 EDT 1942 Feb 9 2:00s
1424 -5:00 Canada E%sT
1425 Zone America/Rainy_River -6:18:16 - LMT 1895
1426 -6:00 Canada C%sT 1940 Sep 29
1427 -6:00 1:00 CDT 1942 Feb 9 2:00s
1428 -6:00 Canada C%sT
1429 Zone America/Atikokan -6:06:28 - LMT 1895
1430 -6:00 Canada C%sT 1940 Sep 29
1431 -6:00 1:00 CDT 1942 Feb 9 2:00s
1432 -6:00 Canada C%sT 1945 Sep 30 2:00
1433 -5:00 - EST
1434
1435
1436 # Manitoba
1437
1438 # From Rob Douglas (2006-04-06):
1439 # the old Manitoba Time Act - as amended by Bill 2, assented to
1440 # March 27, 1987 ... said ...
1441 # "between two o'clock Central Standard Time in the morning of
1442 # the first Sunday of April of each year and two o'clock Central
1443 # Standard Time in the morning of the last Sunday of October next
1444 # following, one hour in advance of Central Standard Time."...
1445 # I believe that the English legislation [of the old time act] had =
1446 # been assented to (March 22, 1967)....
1447 # Also, as far as I can tell, there was no order-in-council varying
1448 # the time of Daylight Saving Time for 2005 and so the provisions of
1449 # the 1987 version would apply - the changeover was at 2:00 Central
1450 # Standard Time (i.e. not until 3:00 Central Daylight Time).
1451
1452 # From Paul Eggert (2006-04-10):
1453 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1454 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume
1455 # it was also 02:00s in 1966.
1456
1457 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1458 Rule Winn 1916 only - Apr 23 0:00 1:00 D
1459 Rule Winn 1916 only - Sep 17 0:00 0 S
1460 Rule Winn 1918 only - Apr 14 2:00 1:00 D
1461 Rule Winn 1918 only - Oct 31 2:00 0 S
1462 Rule Winn 1937 only - May 16 2:00 1:00 D
1463 Rule Winn 1937 only - Sep 26 2:00 0 S
1464 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1465 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
1466 Rule Winn 1945 only - Sep lastSun 2:00 0 S
1467 Rule Winn 1946 only - May 12 2:00 1:00 D
1468 Rule Winn 1946 only - Oct 13 2:00 0 S
1469 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1470 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1471 Rule Winn 1950 only - May 1 2:00 1:00 D
1472 Rule Winn 1950 only - Sep 30 2:00 0 S
1473 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1474 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1475 Rule Winn 1959 only - Oct lastSun 2:00 0 S
1476 Rule Winn 1960 only - Sep lastSun 2:00 0 S
1477 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1478 Rule Winn 1963 only - Sep 22 2:00 0 S
1479 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1480 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1481 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
1482 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1483 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
1484 -6:00 Winn C%sT 2006
1485 -6:00 Canada C%sT
1486
1487
1488 # Saskatchewan
1489
1490 # From Mark Brader (2003-07-26):
1491 # The first actual adoption of DST in Canada was at the municipal
1492 # level. As the [Toronto] Star put it (1912-06-07), "While people
1493 # elsewhere have long been talking of legislation to save daylight,
1494 # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1495 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1496 # presumably late evening, as below), and would run until "the end of
1497 # the summer". The discrepancy between municipal time and railroad
1498 # time was noted.
1499
1500 # From Paul Eggert (2003-07-27):
1501 # Willett (1914-03) notes that DST "has been in operation ... in the
1502 # City of Moose Jaw, Saskatchewan, for one year."
1503
1504 # From Paul Eggert (2006-03-22):
1505 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1506 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1507 # Other western towns (e.g. Lloydminster) are like Edmonton.
1508 # Matthews and Vincent (1998) write that Denare Beach and Creighton
1509 # are like Winnipeg, in violation of Saskatchewan law.
1510
1511 # From W. Jones (1992-11-06):
1512 # The. . .below is based on information I got from our law library, the
1513 # provincial archives, and the provincial Community Services department.
1514 # A precise history would require digging through newspaper archives, and
1515 # since you didn't say what you wanted, I didn't bother.
1516 #
1517 # Saskatchewan is split by a time zone meridian (105W) and over the years
1518 # the boundary became pretty ragged as communities near it reevaluated
1519 # their affiliations in one direction or the other. In 1965 a provincial
1520 # referendum favoured legislating common time practices.
1521 #
1522 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1523 # Saskatchewan 1978) was proclaimed, and established that the eastern
1524 # part of Saskatchewan would use CST year round, that districts in
1525 # northwest Saskatchewan would by default follow CST but could opt to
1526 # follow Mountain Time rules (thus 1 hour difference in the winter and
1527 # zero in the summer), and that districts in southwest Saskatchewan would
1528 # by default follow MT but could opt to follow CST.
1529 #
1530 # It took a few years for the dust to settle (I know one story of a town
1531 # on one time zone having its school in another, such that a mom had to
1532 # serve her family lunch in two shifts), but presently it seems that only
1533 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1534 # rules any more; all other districts appear to have used CST year round
1535 # since sometime in the 1960s.
1536
1537 # From Chris Walton (2006-06-26):
1538 # The Saskatchewan time act which was last updated in 1996 is about 30 pages
1539 # long and rather painful to read.
1540 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1541
1542 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1543 Rule Regina 1918 only - Apr 14 2:00 1:00 D
1544 Rule Regina 1918 only - Oct 31 2:00 0 S
1545 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
1546 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1547 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1548 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1549 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1550 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
1551 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1552 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
1553 Rule Regina 1945 only - Sep lastSun 2:00 0 S
1554 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1555 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
1556 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1557 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1558 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
1559 Rule Regina 1959 only - Oct lastSun 2:00 0 S
1560 #
1561 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1562 Rule Swift 1957 only - Oct lastSun 2:00 0 S
1563 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1564 Rule Swift 1959 only - Oct lastSun 2:00 0 S
1565 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1566 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1567 Zone America/Regina -6:58:36 - LMT 1905 Sep
1568 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1569 -6:00 - CST
1570 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1571 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1572 -7:00 Regina M%sT 1950
1573 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1574 -6:00 - CST
1575
1576
1577 # Alberta
1578
1579 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1580 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1581 Rule Edm 1918 only - Oct 31 2:00 0 S
1582 Rule Edm 1919 only - May 27 2:00 0 S
1583 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1584 Rule Edm 1920 only - Oct lastSun 2:00 0 S
1585 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1586 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1587 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
1588 Rule Edm 1945 only - Sep lastSun 2:00 0 S
1589 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1590 Rule Edm 1947 only - Sep lastSun 2:00 0 S
1591 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1592 Rule Edm 1967 only - Oct lastSun 2:00 0 S
1593 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1594 Rule Edm 1969 only - Oct lastSun 2:00 0 S
1595 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1596 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
1597 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1598 Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1599 -7:00 Edm M%sT 1987
1600 -7:00 Canada M%sT
1601
1602
1603 # British Columbia
1604
1605 # From Paul Eggert (2006-03-22):
1606 # Shanks & Pottenger write that since 1970 most of this region has
1607 # been like Vancouver.
1608 # Dawson Creek uses MST. Much of east BC is like Edmonton.
1609 # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1610
1611 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1612 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1613 Rule Vanc 1918 only - Oct 31 2:00 0 S
1614 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1615 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
1616 Rule Vanc 1945 only - Sep 30 2:00 0 S
1617 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1618 Rule Vanc 1946 only - Oct 13 2:00 0 S
1619 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1620 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
1621 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1622 Zone America/Vancouver -8:12:28 - LMT 1884
1623 -8:00 Vanc P%sT 1987
1624 -8:00 Canada P%sT
1625 Zone America/Dawson_Creek -8:00:56 - LMT 1884
1626 -8:00 Canada P%sT 1947
1627 -8:00 Vanc P%sT 1972 Aug 30 2:00
1628 -7:00 - MST
1629
1630
1631 # Northwest Territories, Nunavut, Yukon
1632
1633 # From Paul Eggert (2006-03-22):
1634 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1635 # Mathew Englander (1996-10-07) gives the following refs:
1636 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1637 # c. 7 defines Yukon standard time as UTC-9. This is still valid;
1638 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1639 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1640 # * O.I.C. 1980/02 established DST.
1641 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1642 # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go
1643 # with Englander.
1644 # From Chris Walton (2006-06-26):
1645 # Here is a link to the old daylight saving portion of the interpretation
1646 # act which was last updated in 1987:
1647 # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf
1648
1649 # From Rives McDow (1999-09-04):
1650 # Nunavut ... moved ... to incorporate the whole territory into one time zone.
1651 # <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
1652 # Nunavut moves to single time zone Oct. 31
1653 # </a>
1654 #
1655 # From Antoine Leca (1999-09-06):
1656 # We then need to create a new timezone for the Kitikmeot region of Nunavut
1657 # to differentiate it from the Yellowknife region.
1658
1659 # From Paul Eggert (1999-09-20):
1660 # <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
1661 # Basic Facts: The New Territory
1662 # </a> (1999) reports that Pangnirtung operates on eastern time,
1663 # and that Coral Harbour does not observe DST. We don't know when
1664 # Pangnirtung switched to eastern time; we'll guess 1995.
1665
1666 # From Rives McDow (1999-11-08):
1667 # On October 31, when the rest of Nunavut went to Central time,
1668 # Pangnirtung wobbled. Here is the result of their wobble:
1669 #
1670 # The following businesses and organizations in Pangnirtung use Central Time:
1671 #
1672 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
1673 # Eastern Arctic National Parks, A & D Specialist
1674 #
1675 # The following businesses and organizations in Pangnirtung use Eastern Time:
1676 #
1677 # Hamlet office, All other businesses, Both schools, Airport operator
1678 #
1679 # This has made for an interesting situation there, which warranted the news.
1680 # No one there that I spoke with seems concerned, or has plans to
1681 # change the local methods of keeping time, as it evidently does not
1682 # really interfere with any activities or make things difficult locally.
1683 # They plan to celebrate New Year's turn-over twice, one hour apart,
1684 # so it appears that the situation will last at least that long.
1685 # The Nunavut Intergovernmental Affairs hopes that they will "come to
1686 # their senses", but the locals evidently don't see any problem with
1687 # the current state of affairs.
1688
1689 # From Michaela Rodrigue, writing in the
1690 # <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
1691 # Nunatsiaq News (1999-11-19)</a>:
1692 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
1693 # central - or Nunavut time - for government offices, and eastern time
1694 # for municipal offices and schools.... Igloolik [was similar but then]
1695 # made the switch to central time on Saturday, Nov. 6.
1696
1697 # From Paul Eggert (2000-10-02):
1698 # Matthews and Vincent (1998) say the following, but we lack histories
1699 # for these potential new Zones.
1700 #
1701 # The Canadian Forces station at Alert uses Eastern Time while the
1702 # handful of residents at the Eureka weather station [in the Central
1703 # zone] skip daylight savings. Baffin Island, which is crossed by the
1704 # Central, Eastern and Atlantic Time zones only uses Eastern Time.
1705 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
1706 # Central Time and Southampton Island [in the Central zone] is not
1707 # required to use daylight savings.
1708
1709 # From
1710 # <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">
1711 # Nunavut now has two time zones
1712 # </a> (2000-11-10):
1713 # The Nunavut government would allow its employees in Kugluktuk and
1714 # Cambridge Bay to operate on central time year-round, putting them
1715 # one hour behind the rest of Nunavut for six months during the winter.
1716 # At the end of October the two communities had rebelled against
1717 # Nunavut's unified time zone, refusing to shift to eastern time with
1718 # the rest of the territory for the winter. Cambridge Bay remained on
1719 # central time, while Kugluktuk, even farther west, reverted to
1720 # mountain time, which they had used before the advent of Nunavut's
1721 # unified time zone in 1999.
1722 #
1723 # From Rives McDow (2001-01-20), quoting the Nunavut government:
1724 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
1725
1726 # From Paul Eggert (2000-12-04):
1727 # Let's just keep track of the official times for now.
1728
1729 # From Rives McDow (2001-03-07):
1730 # The premier of Nunavut has issued a ministerial statement advising
1731 # that effective 2001-04-01, the territory of Nunavut will revert
1732 # back to three time zones (mountain, central, and eastern). Of the
1733 # cities in Nunavut, Coral Harbor is the only one that I know of that
1734 # has said it will not observe dst, staying on EST year round. I'm
1735 # checking for more info, and will get back to you if I come up with
1736 # more.
1737 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
1738
1739 # From Gwillim Law (2005-05-21):
1740 # According to maps at
1741 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg
1742 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg
1743 # (both dated 2003), and
1744 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
1745 # (from a 1998 Canadian Geographic article), the de facto and de jure time
1746 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
1747 # round. Using Google, it's easy to find other websites that confirm this.
1748 # I wasn't able to find how far back this time regimen goes, but since it
1749 # predates the creation of Nunavut, it probably goes back many years....
1750 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
1751 #
1752 # From Paul Eggert (2005-07-26):
1753 # For lack of better information, assume that Southampton Island observed
1754 # daylight saving only during wartime.
1755
1756 # From Chris Walton (2007-03-01):
1757 # ... the community of Resolute (located on Cornwallis Island in
1758 # Nunavut) moved from Central Time to Eastern Time last November.
1759 # Basically the community did not change its clocks at the end of
1760 # daylight saving....
1761 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
1762
1763 # From Chris Walton (2007-03-14):
1764 # Today I phoned the "hamlet office" to find out what Resolute was doing with
1765 # its clocks.
1766 #
1767 # The individual that answered the phone confirmed that the clocks did not
1768 # move at the end of daylight saving on October 29/2006. He also told me that
1769 # the clocks did not move this past weekend (March 11/2007)....
1770
1771 # From Chris Walton (2008-11-13):
1772 # ...the residents of Resolute believe that they are changing "time zones"
1773 # twice a year. In winter months, local time is qualified with "Eastern
1774 # Time" which is really "Eastern Standard Time (UTC-5)". In summer
1775 # months, local time is qualified with "Central Time" which is really
1776 # "Central Daylight Time (UTC-5)"...
1777
1778 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1779 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
1780 Rule NT_YK 1918 only - Oct 27 2:00 0 S
1781 Rule NT_YK 1919 only - May 25 2:00 1:00 D
1782 Rule NT_YK 1919 only - Nov 1 0:00 0 S
1783 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
1784 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
1785 Rule NT_YK 1945 only - Sep 30 2:00 0 S
1786 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
1787 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
1788 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
1789 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
1790 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
1791 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1792 # aka Panniqtuuq
1793 Zone America/Pangnirtung 0 - zzz 1921 # trading post est.
1794 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
1795 -5:00 Canada E%sT 1999 Oct 31 2:00
1796 -6:00 Canada C%sT 2000 Oct 29 2:00
1797 -5:00 Canada E%sT
1798 # formerly Frobisher Bay
1799 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est.
1800 -5:00 NT_YK E%sT 1999 Oct 31 2:00
1801 -6:00 Canada C%sT 2000 Oct 29 2:00
1802 -5:00 Canada E%sT
1803 # aka Qausuittuq
1804 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1805 Rule Resolute 2006 max - Nov Sun>=1 2:00 0 ES
1806 Rule Resolute 2007 max - Mar Sun>=8 2:00 0 CD
1807 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded
1808 -6:00 NT_YK C%sT 2000 Oct 29 2:00
1809 -5:00 - EST 2001 Apr 1 3:00
1810 -6:00 Canada C%sT 2006 Oct 29 2:00
1811 -5:00 Resolute %sT
1812 # aka Kangiqiniq
1813 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded
1814 -6:00 NT_YK C%sT 2000 Oct 29 2:00
1815 -5:00 - EST 2001 Apr 1 3:00
1816 -6:00 Canada C%sT
1817 # aka Iqaluktuuttiaq
1818 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.?
1819 -7:00 NT_YK M%sT 1999 Oct 31 2:00
1820 -6:00 Canada C%sT 2000 Oct 29 2:00
1821 -5:00 - EST 2000 Nov 5 0:00
1822 -6:00 - CST 2001 Apr 1 3:00
1823 -7:00 Canada M%sT
1824 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded?
1825 -7:00 NT_YK M%sT 1980
1826 -7:00 Canada M%sT
1827 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded
1828 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
1829 -7:00 NT_YK M%sT 1980
1830 -7:00 Canada M%sT
1831 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
1832 -9:00 NT_YK Y%sT 1966 Jul 1 2:00
1833 -8:00 NT_YK P%sT 1980
1834 -8:00 Canada P%sT
1835 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
1836 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
1837 -8:00 NT_YK P%sT 1980
1838 -8:00 Canada P%sT
1839
1840
1841 ###############################################################################
1842
1843 # Mexico
1844
1845 # From Paul Eggert (2001-03-05):
1846 # The Investigation and Analysis Service of the
1847 # Mexican Library of Congress (MLoC) has published a
1848 # <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
1849 # history of Mexican local time (in Spanish)
1850 # </a>.
1851 #
1852 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
1853 # (In all cases we go with the MLoC.)
1854 # S&P report that Baja was at -8:00 in 1922/1923.
1855 # S&P say the 1930 transition in Baja was 1930-11-16.
1856 # S&P report no DST during summer 1931.
1857 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
1858
1859 # From Gwillim Law (2001-02-20):
1860 # There are some other discrepancies between the Decrees page and the
1861 # tz database. I think they can best be explained by supposing that
1862 # the researchers who prepared the Decrees page failed to find some of
1863 # the relevant documents.
1864
1865 # From Alan Perry (1996-02-15):
1866 # A guy from our Mexico subsidiary finally found the Presidential Decree
1867 # outlining the timezone changes in Mexico.
1868 #
1869 # ------------- Begin Forwarded Message -------------
1870 #
1871 # I finally got my hands on the Official Presidential Decree that sets up the
1872 # rules for the DST changes. The rules are:
1873 #
1874 # 1. The country is divided in 3 timezones:
1875 # - Baja California Norte (the Mexico/BajaNorte TZ)
1876 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
1877 # - The rest of the country (the Mexico/General TZ)
1878 #
1879 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
1880 # at 2:00 AM, the times in each zone are as follows:
1881 # BajaNorte: GMT+7
1882 # BajaSur: GMT+6
1883 # General: GMT+5
1884 #
1885 # 3. The rest of the year, the times are as follows:
1886 # BajaNorte: GMT+8
1887 # BajaSur: GMT+7
1888 # General: GMT+6
1889 #
1890 # The Decree was published in Mexico's Official Newspaper on January 4th.
1891 #
1892 # -------------- End Forwarded Message --------------
1893 # From Paul Eggert (1996-06-12):
1894 # For an English translation of the decree, see
1895 # <a href="http://mexico-travel.com/extra/timezone_eng.html">
1896 # ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
1897 # </a>
1898
1899 # From Rives McDow (1998-10-08):
1900 # The State of Quintana Roo has reverted back to central STD and DST times
1901 # (i.e. UTC -0600 and -0500 as of 1998-08-02).
1902
1903 # From Rives McDow (2000-01-10):
1904 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
1905 # zone 5 hours from the International Date Line, and will not observe daylight
1906 # savings time so as to stay on the same time zone as the southern part of
1907 # Arizona year round.
1908
1909 # From Jesper Norgaard, translating
1910 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
1911 # In Oaxaca, the 55.000 teachers from the Section 22 of the National
1912 # Syndicate of Education Workers, refuse to apply daylight saving each
1913 # year, so that the more than 10,000 schools work at normal hour the
1914 # whole year.
1915
1916 # From Gwillim Law (2001-01-19):
1917 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
1918 # (translated):...
1919 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
1920 # that Summer Time will be reduced from seven to five months, starting
1921 # this year....
1922 # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
1923 # [translated], says "summer time will ... take effect on the first Sunday
1924 # in May, and end on the last Sunday of September.
1925
1926 # From Arthur David Olson (2001-01-25):
1927 # The 2001-01-24 traditional Washington Post contained the page one
1928 # story "Timely Issue Divides Mexicans."...
1929 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
1930 # ... Mexico City Mayor Lopez Obrador "...is threatening to keep
1931 # Mexico City and its 20 million residents on a different time than
1932 # the rest of the country..." In particular, Lopez Obrador would abolish
1933 # observation of Daylight Saving Time.
1934
1935 # <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
1936 # Official statute published by the Energy Department
1937 # </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
1938 # and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03).
1939
1940 # From Paul Eggert (2001-03-03):
1941 #
1942 # <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
1943 # James F. Smith writes in today's LA Times
1944 # </a>
1945 # * Sonora will continue to observe standard time.
1946 # * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
1947 # the Federal District will not adopt DST.
1948 # * 4 of 16 district leaders announced they'll ignore the decree.
1949 # * The decree does not affect federal-controlled facilities including
1950 # the airport, banks, hospitals, and schools.
1951 #
1952 # For now we'll assume that the Federal District will bow to federal rules.
1953
1954 # From Jesper Norgaard (2001-04-01):
1955 # I found some references to the Mexican application of daylight
1956 # saving, which modifies what I had already sent you, stating earlier
1957 # that a number of northern Mexican states would go on daylight
1958 # saving. The modification reverts this to only cover Baja California
1959 # (Norte), while all other states (except Sonora, who has no daylight
1960 # saving all year) will follow the original decree of president
1961 # Vicente Fox, starting daylight saving May 6, 2001 and ending
1962 # September 30, 2001.
1963 # References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
1964 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
1965
1966 # From Reuters (2001-09-04):
1967 # Mexico's Supreme Court on Tuesday declared that daylight savings was
1968 # unconstitutional in Mexico City, creating the possibility the
1969 # capital will be in a different time zone from the rest of the nation
1970 # next year.... The Supreme Court's ruling takes effect at 2:00
1971 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
1972 # standard time. "This is so residents of the Federal District are not
1973 # subject to unexpected time changes," a statement from the court said.
1974
1975 # From Jesper Norgaard Welen (2002-03-12):
1976 # ... consulting my local grocery store(!) and my coworkers, they all insisted
1977 # that a new decision had been made to reinstate US style DST in Mexico....
1978 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
1979 # confirms this. Sonora as usual is the only state where DST is not applied.
1980
1981 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1982 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
1983 Rule Mexico 1939 only - Jun 25 0:00 0 S
1984 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
1985 Rule Mexico 1941 only - Apr 1 0:00 0 S
1986 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
1987 Rule Mexico 1944 only - May 1 0:00 0 S
1988 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
1989 Rule Mexico 1950 only - Jul 30 0:00 0 S
1990 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
1991 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
1992 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
1993 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
1994 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
1995 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
1996 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1997 # Quintana Roo
1998 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
1999 -6:00 - CST 1981 Dec 23
2000 -5:00 Mexico E%sT 1998 Aug 2 2:00
2001 -6:00 Mexico C%sT
2002 # Campeche, Yucatan
2003 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2004 -6:00 - CST 1981 Dec 23
2005 -5:00 - EST 1982 Dec 2
2006 -6:00 Mexico C%sT
2007 # Coahuila, Durango, Nuevo Leon, Tamaulipas
2008 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
2009 -6:00 - CST 1988
2010 -6:00 US C%sT 1989
2011 -6:00 Mexico C%sT
2012 # Central Mexico
2013 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
2014 -7:00 - MST 1927 Jun 10 23:00
2015 -6:00 - CST 1930 Nov 15
2016 -7:00 - MST 1931 May 1 23:00
2017 -6:00 - CST 1931 Oct
2018 -7:00 - MST 1932 Apr 1
2019 -6:00 Mexico C%sT 2001 Sep 30 02:00
2020 -6:00 - CST 2002 Feb 20
2021 -6:00 Mexico C%sT
2022 # Chihuahua
2023 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
2024 -7:00 - MST 1927 Jun 10 23:00
2025 -6:00 - CST 1930 Nov 15
2026 -7:00 - MST 1931 May 1 23:00
2027 -6:00 - CST 1931 Oct
2028 -7:00 - MST 1932 Apr 1
2029 -6:00 - CST 1996
2030 -6:00 Mexico C%sT 1998
2031 -6:00 - CST 1998 Apr Sun>=1 3:00
2032 -7:00 Mexico M%sT
2033 # Sonora
2034 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
2035 -7:00 - MST 1927 Jun 10 23:00
2036 -6:00 - CST 1930 Nov 15
2037 -7:00 - MST 1931 May 1 23:00
2038 -6:00 - CST 1931 Oct
2039 -7:00 - MST 1932 Apr 1
2040 -6:00 - CST 1942 Apr 24
2041 -7:00 - MST 1949 Jan 14
2042 -8:00 - PST 1970
2043 -7:00 Mexico M%sT 1999
2044 -7:00 - MST
2045 # Baja California Sur, Nayarit, Sinaloa
2046 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
2047 -7:00 - MST 1927 Jun 10 23:00
2048 -6:00 - CST 1930 Nov 15
2049 -7:00 - MST 1931 May 1 23:00
2050 -6:00 - CST 1931 Oct
2051 -7:00 - MST 1932 Apr 1
2052 -6:00 - CST 1942 Apr 24
2053 -7:00 - MST 1949 Jan 14
2054 -8:00 - PST 1970
2055 -7:00 Mexico M%sT
2056 # Baja California
2057 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
2058 -7:00 - MST 1924
2059 -8:00 - PST 1927 Jun 10 23:00
2060 -7:00 - MST 1930 Nov 15
2061 -8:00 - PST 1931 Apr 1
2062 -8:00 1:00 PDT 1931 Sep 30
2063 -8:00 - PST 1942 Apr 24
2064 -8:00 1:00 PWT 1945 Aug 14 23:00u
2065 -8:00 1:00 PPT 1945 Nov 12 # Peace
2066 -8:00 - PST 1948 Apr 5
2067 -8:00 1:00 PDT 1949 Jan 14
2068 -8:00 - PST 1954
2069 -8:00 CA P%sT 1961
2070 -8:00 - PST 1976
2071 -8:00 US P%sT 1996
2072 -8:00 Mexico P%sT 2001
2073 -8:00 US P%sT 2002 Feb 20
2074 -8:00 Mexico P%sT
2075 # From Paul Eggert (2006-03-22):
2076 # Formerly there was an America/Ensenada zone, which differed from
2077 # America/Tijuana only in that it did not observe DST from 1976
2078 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
2079 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
2080 # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
2081 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2082 # DST-observance was a town-by-town matter back then. This concerns
2083 # data after 1970 so most likely there should be at least one Zone
2084 # other than America/Tijuana for Baja, but it's not clear yet what its
2085 # name or contents should be.
2086 #
2087 # Revillagigedo Is
2088 # no information
2089
2090 ###############################################################################
2091
2092 # Anguilla
2093 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2094 Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
2095 -4:00 - AST
2096
2097 # Antigua and Barbuda
2098 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2099 Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
2100 -5:00 - EST 1951
2101 -4:00 - AST
2102
2103 # Bahamas
2104 #
2105 # From Sue Williams (2006-12-07):
2106 # The Bahamas announced about a month ago that they plan to change their DST
2107 # rules to sync with the U.S. starting in 2007....
2108 # http://www.jonesbahamas.com/?c=45&a=10412
2109
2110 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2111 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2112 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
2113 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2114 Zone America/Nassau -5:09:24 - LMT 1912 Mar 2
2115 -5:00 Bahamas E%sT 1976
2116 -5:00 US E%sT
2117
2118 # Barbados
2119 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2120 Rule Barb 1977 only - Jun 12 2:00 1:00 D
2121 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2122 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2123 Rule Barb 1979 only - Sep 30 2:00 0 S
2124 Rule Barb 1980 only - Sep 25 2:00 0 S
2125 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2126 Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown
2127 -3:58:28 - BMT 1932 # Bridgetown Mean Time
2128 -4:00 Barb A%sT
2129
2130 # Belize
2131 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2132 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2133 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
2134 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
2135 Rule Belize 1973 only - Dec 5 0:00 1:00 D
2136 Rule Belize 1974 only - Feb 9 0:00 0 S
2137 Rule Belize 1982 only - Dec 18 0:00 1:00 D
2138 Rule Belize 1983 only - Feb 12 0:00 0 S
2139 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2140 Zone America/Belize -5:52:48 - LMT 1912 Apr
2141 -6:00 Belize C%sT
2142
2143 # Bermuda
2144
2145 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2146
2147 # Next year, however, clocks in the US will go forward on the second Sunday
2148 # in March, until the first Sunday in November. And, after the Time Zone
2149 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2150 # Friday, the same thing will happen in Bermuda.
2151 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2152
2153 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2154 Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton
2155 -4:00 - AST 1974 Apr 28 2:00
2156 -4:00 Bahamas A%sT 1976
2157 -4:00 US A%sT
2158
2159 # Cayman Is
2160 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2161 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
2162 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2163 -5:00 - EST
2164
2165 # Costa Rica
2166 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2167 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2168 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2169 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2170 # IATA SSIM (1991-09) says the following was at 1:00;
2171 # go with Shanks & Pottenger.
2172 Rule CR 1991 only - Jul 1 0:00 0 S
2173 Rule CR 1992 only - Mar 15 0:00 0 S
2174 # There are too many San Joses elsewhere, so we'll use `Costa Rica'.
2175 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2176 Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
2177 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time
2178 -6:00 CR C%sT
2179 # Coco
2180 # no information; probably like America/Costa_Rica
2181
2182 # Cuba
2183
2184 # From Arthur David Olson (1999-03-29):
2185 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2186 # the Cuban National Team and the Baltimore Orioles was carried live on
2187 # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2188 # During the game, play-by-play announcer Jim Hunter noted that
2189 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2190 # Time today." (The "two hour" remark referred to losing one hour of
2191 # sleep on 1999-03-28--when the announcers were in Cuba as it switched
2192 # to DST--and one more hour on 1999-04-04--when the announcers will have
2193 # returned to Baltimore, which switches on that date.)
2194
2195 # From Evert van der Veer via Steffen Thorsen (2004-10-28):
2196 # Cuba is not going back to standard time this year.
2197 # From Paul Eggert (2006-03-22):
2198 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2199 # says that it's due to a problem at the Antonio Guiteras
2200 # thermoelectric plant, and says "This October there will be no return
2201 # to normal hours (after daylight saving time)".
2202 # For now, let's assume that it's a temporary measure.
2203
2204 # From Carlos A. Carnero Delgado (2005-11-12):
2205 # This year (just like in 2004-2005) there's no change in time zone
2206 # adjustment in Cuba. We will stay in daylight saving time:
2207 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2208
2209 # From Jesper Norgaard Welen (2006-10-21):
2210 # An article in GRANMA INTERNACIONAL claims that Cuba will end
2211 # the 3 years of permanent DST next weekend, see
2212 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2213 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2214 # watches should be set back one hour -- going back to 00:00 hours -- returning
2215 # to the normal schedule....
2216
2217 # From Paul Eggert (2007-03-02):
2218 # http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday,
2219 # says Cuban clocks will advance at midnight on March 10.
2220 # For lack of better information, assume Cuba will use US rules,
2221 # except that it switches at midnight standard time as usual.
2222 #
2223 # From Steffen Thorsen (2007-10-25):
2224 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2225 # earlier - on the last Sunday of October, just like in 2006.
2226 #
2227 # He supplied these references:
2228 #
2229 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2230 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2231 #
2232 # From Alex Kryvenishev (2007-10-25):
2233 # Here is also article from Granma (Cuba):
2234 #
2235 # [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre
2236 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2237 #
2238 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
2239
2240 # From Arthur David Olson (2008-03-09):
2241 # I'm in Maryland which is now observing United States Eastern Daylight
2242 # Time. At 9:44 local time I used RealPlayer to listen to
2243 # <a href="http://media.enet.cu/radioreloj">
2244 # http://media.enet.cu/radioreloj
2245 # </a>, a Cuban information station, and heard
2246 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2247 # indicating that Cuba is still on standard time.
2248
2249 # From Steffen Thorsen (2008-03-12):
2250 # It seems that Cuba will start DST on Sunday, 2007-03-16...
2251 # It was announced yesterday, according to this source (in Spanish):
2252 # <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm">
2253 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2254 # </a>
2255 #
2256 # Some more background information is posted here:
2257 # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html">
2258 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2259 # </a>
2260 #
2261 # The article also says that Cuba has been observing DST since 1963,
2262 # while Shanks (and tzdata) has 1965 as the first date (except in the
2263 # 1940's). Many other web pages in Cuba also claim that it has been
2264 # observed since 1963, but with the exception of 1970 - an exception
2265 # which is not present in tzdata/Shanks. So there is a chance we need to
2266 # change some historic records as well.
2267 #
2268 # One example:
2269 # <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm">
2270 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2271 # </a>
2272
2273 # From Jesper Norgaard Welen (2008-03-13):
2274 # The Cuban time change has just been confirmed on the most authoritative
2275 # web site, the Granma. Please check out
2276 # <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html">
2277 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2278 # </a>
2279 #
2280 # Basically as expected after Steffen Thorsens information, the change
2281 # will take place midnight between Saturday and Sunday.
2282
2283 # From Arthur David Olson (2008-03-12):
2284 # Assume Sun>=15 (third Sunday) going forward.
2285
2286 # From Alexander Krivenyshev (2009-03-04)
2287 # According to the Radio Reloj - Cuba will start Daylight Saving Time on
2288 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2289 # not on midnight March 14 / March 15 as previously thought.
2290 #
2291 # <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html">
2292 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2293 # (in Spanish)
2294 # </a>
2295
2296 # From Arthur David Olson (2009-03-09)
2297 # I listened over the Internet to
2298 # <a href="http://media.enet.cu/readioreloj">
2299 # http://media.enet.cu/readioreloj
2300 # </a>
2301 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2302 # the time was announced as "diez cinco"--the same time as here, indicating
2303 # that has indeed switched to DST. Assume second Sunday from 2009 forward.
2304
2305 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2306 Rule Cuba 1928 only - Jun 10 0:00 1:00 D
2307 Rule Cuba 1928 only - Oct 10 0:00 0 S
2308 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
2309 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
2310 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
2311 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
2312 Rule Cuba 1965 only - Jun 1 0:00 1:00 D
2313 Rule Cuba 1965 only - Sep 30 0:00 0 S
2314 Rule Cuba 1966 only - May 29 0:00 1:00 D
2315 Rule Cuba 1966 only - Oct 2 0:00 0 S
2316 Rule Cuba 1967 only - Apr 8 0:00 1:00 D
2317 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
2318 Rule Cuba 1968 only - Apr 14 0:00 1:00 D
2319 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
2320 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
2321 Rule Cuba 1972 1974 - Oct 8 0:00 0 S
2322 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
2323 Rule Cuba 1978 only - May 7 0:00 1:00 D
2324 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
2325 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
2326 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
2327 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
2328 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
2329 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
2330 Rule Cuba 1996 only - Oct 6 0:00s 0 S
2331 Rule Cuba 1997 only - Oct 12 0:00s 0 S
2332 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
2333 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
2334 Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D
2335 Rule Cuba 2006 max - Oct lastSun 0:00s 0 S
2336 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
2337 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
2338 Rule Cuba 2009 max - Mar Sun>=8 0:00s 1:00 D
2339
2340 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2341 Zone America/Havana -5:29:28 - LMT 1890
2342 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
2343 -5:00 Cuba C%sT
2344
2345 # Dominica
2346 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2347 Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
2348 -4:00 - AST
2349
2350 # Dominican Republic
2351
2352 # From Steffen Thorsen (2000-10-30):
2353 # Enrique Morales reported to me that the Dominican Republic has changed the
2354 # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2355 # http://www.listin.com.do/antes/261000/republica/princi.html
2356
2357 # From Paul Eggert (2000-12-04):
2358 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
2359
2360 # From Rives McDow (2000-12-01):
2361 # Dominican Republic changed its mind and presidential decree on Tuesday,
2362 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
2363 # Dominican Republic will be reverting to 8 hours from the International Date
2364 # Line, and will not be using DST in the foreseeable future. The reason they
2365 # decided to use DST was to be in synch with Puerto Rico, who was also going
2366 # to implement DST. When Puerto Rico didn't implement DST, the president
2367 # decided to revert.
2368
2369
2370 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2371 Rule DR 1966 only - Oct 30 0:00 1:00 D
2372 Rule DR 1967 only - Feb 28 0:00 0 S
2373 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
2374 Rule DR 1970 only - Feb 21 0:00 0 S
2375 Rule DR 1971 only - Jan 20 0:00 0 S
2376 Rule DR 1972 1974 - Jan 21 0:00 0 S
2377 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2378 Zone America/Santo_Domingo -4:39:36 - LMT 1890
2379 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
2380 -5:00 DR E%sT 1974 Oct 27
2381 -4:00 - AST 2000 Oct 29 02:00
2382 -5:00 US E%sT 2000 Dec 3 01:00
2383 -4:00 - AST
2384
2385 # El Salvador
2386
2387 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2388 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
2389 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
2390 # There are too many San Salvadors elsewhere, so use America/El_Salvador
2391 # instead of America/San_Salvador.
2392 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2393 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
2394 -6:00 Salv C%sT
2395
2396 # Grenada
2397 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2398 Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's
2399 -4:00 - AST
2400
2401 # Guadeloupe
2402 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2403 Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
2404 -4:00 - AST
2405 # St Barthelemy
2406 Link America/Guadeloupe America/St_Barthelemy
2407 # St Martin (French part)
2408 Link America/Guadeloupe America/Marigot
2409
2410 # Guatemala
2411 #
2412 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
2413 # Diario Co Latino, at
2414 # http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,
2415 # says in an article dated 2006-04-19 that the Guatemalan government had
2416 # decided on that date to advance official time by 60 minutes, to lessen the
2417 # impact of the elevated cost of oil.... Daylight saving time will last from
2418 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
2419 # From Paul Eggert (2006-06-22):
2420 # The Ministry of Energy and Mines, press release CP-15/2006
2421 # (2006-04-19), says DST ends at 24:00. See
2422 # <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>.
2423
2424 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2425 Rule Guat 1973 only - Nov 25 0:00 1:00 D
2426 Rule Guat 1974 only - Feb 24 0:00 0 S
2427 Rule Guat 1983 only - May 21 0:00 1:00 D
2428 Rule Guat 1983 only - Sep 22 0:00 0 S
2429 Rule Guat 1991 only - Mar 23 0:00 1:00 D
2430 Rule Guat 1991 only - Sep 7 0:00 0 S
2431 Rule Guat 2006 only - Apr 30 0:00 1:00 D
2432 Rule Guat 2006 only - Oct 1 0:00 0 S
2433 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2434 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
2435 -6:00 Guat C%sT
2436
2437 # Haiti
2438 # From Gwillim Law (2005-04-15):
2439 # Risto O. Nykanen wrote me that Haiti is now on DST.
2440 # I searched for confirmation, and I found a
2441 # <a href="http://www.haitianconsulate.org/time.doc"> press release
2442 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
2443 # </a>. Translated from French, it says:
2444 #
2445 # "The Prime Minister's Communication Office notifies the public in general
2446 # and the press in particular that, following a decision of the Interior
2447 # Ministry and the Territorial Collectivities [I suppose that means the
2448 # provinces], Haiti will move to Eastern Daylight Time in the night from next
2449 # Saturday the 2nd to Sunday the 3rd.
2450 #
2451 # "Consequently, the Prime Minister's Communication Office wishes to inform
2452 # the population that the country's clocks will be set forward one hour
2453 # starting at midnight. This provision will hold until the last Saturday in
2454 # October 2005.
2455 #
2456 # "Port-au-Prince, March 31, 2005"
2457 #
2458 # From Steffen Thorsen (2006-04-04):
2459 # I have been informed by users that Haiti observes DST this year like
2460 # last year, so the current "only" rule for 2005 might be changed to a
2461 # "max" rule or to last until 2006. (Who knows if they will observe DST
2462 # next year or if they will extend their DST like US/Canada next year).
2463 #
2464 # I have found this article about it (in French):
2465 # http://www.haitipressnetwork.com/news.cfm?articleID=7612
2466 #
2467 # The reason seems to be an energy crisis.
2468
2469 # From Stephen Colebourne (2007-02-22):
2470 # Some IATA info: Haiti won't be having DST in 2007.
2471
2472
2473 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2474 Rule Haiti 1983 only - May 8 0:00 1:00 D
2475 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
2476 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
2477 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
2478 # Go with IATA.
2479 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
2480 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
2481 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
2482 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
2483 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2484 Zone America/Port-au-Prince -4:49:20 - LMT 1890
2485 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
2486 -5:00 Haiti E%sT
2487
2488 # Honduras
2489 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
2490
2491 # From Paul Eggert (2006-05-05):
2492 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
2493 # saying Honduras will start using DST midnight Saturday, effective 4
2494 # months until September. La Tribuna reported today
2495 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
2496 # of Honduras, refused to back down on this.
2497
2498 # From Jesper Norgaard Welen (2006-08-08):
2499 # It seems that Honduras has returned from DST to standard time this Monday at
2500 # 00:00 hours (prolonging Sunday to 25 hours duration).
2501 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
2502
2503 # From Paul Eggert (2006-08-08):
2504 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08)
2505 # <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>.
2506 # It mentions executive decree 18-2006.
2507
2508 # From Steffen Thorsen (2006-08-17):
2509 # Honduras will observe DST from 2007 to 2009, exact dates are not
2510 # published, I have located this authoritative source:
2511 # http://www.presidencia.gob.hn/noticia.aspx?nId=47
2512
2513 # From Steffen Thorsen (2007-03-30):
2514 # http://www.laprensahn.com/pais_nota.php?id04962=7386
2515 # So it seems that Honduras will not enter DST this year....
2516
2517 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2518 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
2519 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
2520 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
2521 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
2522 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2523 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
2524 -6:00 Hond C%sT
2525 #
2526 # Great Swan I ceded by US to Honduras in 1972
2527
2528 # Jamaica
2529
2530 # From Bob Devine (1988-01-28):
2531 # Follows US rules.
2532
2533 # From U. S. Naval Observatory (1989-01-19):
2534 # JAMAICA 5 H BEHIND UTC
2535
2536 # From Shanks & Pottenger:
2537 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2538 Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
2539 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2540 -5:00 - EST 1974 Apr 28 2:00
2541 -5:00 US E%sT 1984
2542 -5:00 - EST
2543
2544 # Martinique
2545 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2546 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
2547 -4:04:20 - FFMT 1911 May # Fort-de-France MT
2548 -4:00 - AST 1980 Apr 6
2549 -4:00 1:00 ADT 1980 Sep 28
2550 -4:00 - AST
2551
2552 # Montserrat
2553 # From Paul Eggert (2006-03-22):
2554 # In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.
2555 # world.gazetteer.com says Cork Hill is the most populous location now.
2556 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2557 Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill
2558 -4:00 - AST
2559
2560 # Nicaragua
2561 #
2562 # This uses Shanks & Pottenger for times before 2005.
2563 #
2564 # From Steffen Thorsen (2005-04-12):
2565 # I've got reports from 8 different people that Nicaragua just started
2566 # DST on Sunday 2005-04-10, in order to save energy because of
2567 # expensive petroleum. The exact end date for DST is not yet
2568 # announced, only "September" but some sites also say "mid-September".
2569 # Some background information is available on the President's official site:
2570 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
2571 # The Decree, no 23-2005 is available here:
2572 # 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
2573 #
2574 # From Paul Eggert (2005-05-01):
2575 # The decree doesn't say anything about daylight saving, but for now let's
2576 # assume that it is daylight saving....
2577 #
2578 # From Gwillim Law (2005-04-21):
2579 # The Associated Press story on the time change, which can be found at
2580 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
2581 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last
2582 # time that a change of clocks was applied to save energy was in the year 2000
2583 # during the Arnoldo Aleman administration."...
2584 # The northamerica file says that Nicaragua has been on UTC-6 continuously
2585 # since December 1998. I wasn't able to find any details of Nicaraguan time
2586 # changes in 2000. Perhaps a note could be added to the northamerica file, to
2587 # the effect that we have indirect evidence that DST was observed in 2000.
2588 #
2589 # From Jesper Norgaard Welen (2005-11-02):
2590 # Nicaragua left DST the 2005-10-02 at 00:00 (local time).
2591 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
2592 # (2005-09-26)
2593 #
2594 # From Jesper Norgaard Welen (2006-05-05):
2595 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
2596 # (my informal translation)
2597 # By order of the president of the republic, Enrique Bolanos, Nicaragua
2598 # advanced by sixty minutes their official time, yesterday at 2 in the
2599 # morning, and will stay that way until 30.th. of september.
2600 #
2601 # From Jesper Norgaard Welen (2006-09-30):
2602 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
2603 # My informal translation runs:
2604 # The natural sun time is restored in all the national territory, in that the
2605 # time is returned one hour at 01:00 am of October 1 of 2006.
2606 #
2607 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2608 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
2609 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
2610 Rule Nic 2005 only - Apr 10 0:00 1:00 D
2611 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
2612 Rule Nic 2006 only - Apr 30 2:00 1:00 D
2613 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
2614 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2615 Zone America/Managua -5:45:08 - LMT 1890
2616 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
2617 -6:00 - CST 1973 May
2618 -5:00 - EST 1975 Feb 16
2619 -6:00 Nic C%sT 1992 Jan 1 4:00
2620 -5:00 - EST 1992 Sep 24
2621 -6:00 - CST 1993
2622 -5:00 - EST 1997
2623 -6:00 Nic C%sT
2624
2625 # Panama
2626 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2627 Zone America/Panama -5:18:08 - LMT 1890
2628 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time
2629 -5:00 - EST
2630
2631 # Puerto Rico
2632 # There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
2633 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2634 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
2635 -4:00 - AST 1942 May 3
2636 -4:00 US A%sT 1946
2637 -4:00 - AST
2638
2639 # St Kitts-Nevis
2640 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2641 Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
2642 -4:00 - AST
2643
2644 # St Lucia
2645 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2646 Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
2647 -4:04:00 - CMT 1912 # Castries Mean Time
2648 -4:00 - AST
2649
2650 # St Pierre and Miquelon
2651 # There are too many St Pierres elsewhere, so we'll use `Miquelon'.
2652 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2653 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
2654 -4:00 - AST 1980 May
2655 -3:00 - PMST 1987 # Pierre & Miquelon Time
2656 -3:00 Canada PM%sT
2657
2658 # St Vincent and the Grenadines
2659 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2660 Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
2661 -4:04:56 - KMT 1912 # Kingstown Mean Time
2662 -4:00 - AST
2663
2664 # Turks and Caicos
2665 #
2666 # From Chris Dunn in
2667 # <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007>
2668 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
2669 # daylight saving dates for time changes have been adjusted to match
2670 # the recent U.S. change of dates.
2671 #
2672 # From Brian Inglis (2007-04-28):
2673 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
2674 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
2675 # rows before that there is an out of date entry for Oct:
2676 # "Eastern Standard Times Begins 2007
2677 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
2678 # indicating that the normal ET rules are followed.
2679 #
2680 # From Paul Eggert (2006-05-01):
2681 # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998)
2682 # says they switch at midnight. Go with Shanks & Pottenger.
2683 #
2684 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2685 Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D
2686 Rule TC 1979 2006 - Oct lastSun 2:00 0 S
2687 Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D
2688 Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D
2689 Rule TC 2007 max - Nov Sun>=1 2:00 0 S
2690 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2691 Zone America/Grand_Turk -4:44:32 - LMT 1890
2692 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2693 -5:00 TC E%sT
2694
2695 # British Virgin Is
2696 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2697 Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
2698 -4:00 - AST
2699
2700 # Virgin Is
2701 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2702 Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
2703 -4:00 - AST