Sync zoneinfo database with tzdata2009h from elsie.
[dragonfly.git] / share / zoneinfo / northamerica
CommitLineData
34850bd5 1# <pre>
a8537cfa
SW
2# @(#)northamerica 8.28
3# This file is in the public domain, so clarified as of
4# 2009-05-17 by Arthur David Olson.
34850bd5 5
984263bc
MD
6# also includes Central America and the Caribbean
7
8# This data is by no means authoritative; if you think you know better,
9# go ahead and edit the file (and please send any changes to
10# tz@elsie.nci.nih.gov for general use in the future).
11
bc95ec93 12# From Paul Eggert (1999-03-22):
984263bc
MD
13# A reliable and entertaining source about time zones is
14# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
15
16###############################################################################
17
18# United States
19
20# From Paul Eggert (1999-03-31):
21# Howse writes (pp 121-125) that time zones were invented by
22# Professor Charles Ferdinand Dowd (1825-1904),
23# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
24# His pamphlet ``A System of National Time for Railroads'' (1870)
25# was the result of his proposals at the Convention of Railroad Trunk Lines
26# in New York City (1869-10). His 1870 proposal was based on Washington, DC,
27# but in 1872-05 he moved the proposed origin to Greenwich.
28# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
29# and the most of the country soon followed suit.
30
bc95ec93
SW
31# From Paul Eggert (2005-04-16):
32# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
33# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
34
bd7414aa 35# From Paul Eggert (2006-03-22):
984263bc
MD
36# A good source for time zone historical data in the US is
37# Thomas G. Shanks, The American Atlas (5th edition),
38# San Diego: ACS Publications, Inc. (1991).
39# Make sure you have the errata sheet; the book is somewhat useless without it.
bd7414aa 40# It is the source for most of the pre-1991 US entries below.
984263bc
MD
41
42# From Paul Eggert (2001-03-06):
43# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
44# in his whimsical essay ``An Economical Project for Diminishing the Cost
45# of Light'' published in the Journal de Paris (1784-04-26).
46# Not everyone is happy with the results:
47#
48# I don't really care how time is reckoned so long as there is some
49# agreement about it, but I object to being told that I am saving
50# daylight when my reason tells me that I am doing nothing of the kind.
51# I even object to the implication that I am wasting something
52# valuable if I stay in bed after the sun has risen. As an admirer
53# of moonlight I resent the bossy insistence of those who want to
54# reduce my time for enjoying it. At the back of the Daylight Saving
55# scheme I detect the bony, blue-fingered hand of Puritanism, eager
56# to push people into bed earlier, and get them up earlier, to make
57# them healthy, wealthy and wise in spite of themselves.
58#
bc95ec93
SW
59# -- Robertson Davies, The diary of Samuel Marchbanks,
60# Clarke, Irwin (1947), XIX, Sunday
984263bc
MD
61#
62# For more about the first ten years of DST in the United States, see
63# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
64# Ten years of daylight saving from the Pittsburgh standpoint
65# (Carnegie Library of Pittsburgh, 1927)</a>.
66#
67# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
68# However, DST was imposed by the Standard Time Act of 1918, which
69# was the first nationwide legal time standard, and apparently
70# time was just called "Standard Time" or "Daylight Saving Time".
71
72# From Arthur David Olson:
73# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
74# See, for example, the front page of the Saturday, 1974-10-26
75# and Sunday, 1974-10-27 editions of the Washington Post.
76
77# From Arthur David Olson:
78# Before the Uniform Time Act of 1966 took effect in 1967, observance of
79# Daylight Saving Time in the US was by local option, except during wartime.
80
81# From Arthur David Olson (2000-09-25):
82# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
83# In the introduction, Oboler spoke of "Eastern Peace Time."
84# An AltaVista search turned up
85# <a href="http://rowayton.org/rhs/hstaug45.html">:
86# "When the time is announced over the radio now, it is 'Eastern Peace
87# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
88# </a> (August 1945) by way of confirmation.
89
9ffe4b14 90# From Joseph Gallant citing
984263bc
MD
91# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
92# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
93# to switch to London for Attlee's address, but the American people
94# never got to hear his speech live. According to one press account,
95# CBS' Bob Trout was first to announce the word of Japan's surrender,
96# but a few seconds later, NBC, ABC and Mutual also flashed the word
97# of surrender, all of whom interrupting the bells of Big Ben in
98# London which were to precede Mr. Attlee's speech.
99
100# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From
101# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
102#
103# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
104# Any announcement from Asia would reach St. John's New York newsroom on a
105# wire service teletype machine, which had prescribed signals for major news.
106# Associated Press, for example, would ring five bells before spewing out
107# typed copy of an important story, and 10 bells for news "of transcendental
108# importance."
109#
110# On Aug. 14, stalling while talking steadily into the NBC networks' open
111# microphone, St. John heard five bells and waited only to hear a sixth bell,
112# before announcing confidently: "Ladies and gentlemen, World War II is over.
113# The Japanese have agreed to our surrender terms."
114#
115# He had scored a 20-second scoop on other broadcasters.
116
9ffe4b14
SW
117# From Arthur David Olson (2005-08-22):
118# Paul has been careful to use the "US" rules only in those locations
119# that are part of the United States; this reflects the real scope of
120# U.S. government action. So even though the "US" rules have changed
121# in the latest release, other countries won't be affected.
122
984263bc
MD
123# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
124Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
125Rule US 1918 1919 - Oct lastSun 2:00 0 S
126Rule US 1942 only - Feb 9 2:00 1:00 W # War
127Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
128Rule US 1945 only - Sep 30 2:00 0 S
9ffe4b14 129Rule US 1967 2006 - Oct lastSun 2:00 0 S
984263bc
MD
130Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
131Rule US 1974 only - Jan 6 2:00 1:00 D
132Rule US 1975 only - Feb 23 2:00 1:00 D
133Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
9ffe4b14
SW
134Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
135Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
136Rule US 2007 max - Nov Sun>=1 2:00 0 S
984263bc 137
34850bd5
SW
138# From Arthur David Olson, 2005-12-19
139# We generate the files specified below to guard against old files with
140# obsolete information being left in the time zone binary directory.
141# We limit the list to names that have appeared in previous versions of
142# this time zone package.
143# We do these as separate Zones rather than as Links to avoid problems if
144# a particular place changes whether it observes DST.
145# We put these specifications here in the northamerica file both to
146# increase the chances that they'll actually get compiled and to
147# avoid the need to duplicate the US rules in another file.
148
149# Zone NAME GMTOFF RULES FORMAT [UNTIL]
150Zone EST -5:00 - EST
151Zone MST -7:00 - MST
152Zone HST -10:00 - HST
153Zone EST5EDT -5:00 US E%sT
154Zone CST6CDT -6:00 US C%sT
155Zone MST7MDT -7:00 US M%sT
156Zone PST8PDT -8:00 US P%sT
157
984263bc
MD
158# From Bob Devine (1988-01-28):
159# ...Alaska (and Hawaii) had the timezone names changed in 1967.
160# old new
161# Pacific Standard Time(PST) -same-
162# Yukon Standard Time(YST) -same-
163# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
164# Nome Standard Time (NT) Bering Standard Time (BST)
165#
166# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
167# The YST zone now covers nearly all of the state, AHST just part
168# of the Aleutian islands. No DST.
169
170# From Paul Eggert (1995-12-19):
171# The tables below use `NST', not `NT', for Nome Standard Time.
172# I invented `CAWT' for Central Alaska War Time.
173
174# From U. S. Naval Observatory (1989-01-19):
175# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
176# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
177# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
178# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
179# USA MOUNTAIN 7 H BEHIND UTC DENVER
180# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
181# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
182# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
183# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
184# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
185# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
186# USA - " - 9 H BEHIND UTC APR 3 - OCT 30
187# USA HAWAII 10 H BEHIND UTC
188# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
189
190# From Arthur David Olson (1989-01-21):
191# The above dates are for 1988.
192# Note the "AKST" and "AKDT" abbreviations, the claim that there's
193# no DST in Samoa, and the claim that there is DST in Alaska and the
194# Aleutians.
195
196# From Arthur David Olson (1988-02-13):
197# Legal standard time zone names, from United States Code (1982 Edition and
198# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
199# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
200# took effect), as explained in sections 263 and 261:
201# (none)
202# United States standard eastern time
203# United States standard mountain time
204# United States standard central time
205# United States standard Pacific time
206# (none)
207# United States standard Alaska time
208# (none)
209# Next, names from 1967-04-01 until 1983-11-30 (the date for
210# public law 98-181):
211# Atlantic standard time
212# eastern standard time
213# central standard time
214# mountain standard time
215# Pacific standard time
216# Yukon standard time
217# Alaska-Hawaii standard time
218# Bering standard time
219# And after 1983-11-30:
220# Atlantic standard time
221# eastern standard time
222# central standard time
223# mountain standard time
224# Pacific standard time
225# Alaska standard time
226# Hawaii-Aleutian standard time
227# Samoa standard time
228# The law doesn't give abbreviations.
229#
984263bc
MD
230# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
231# Public law 106-564 (2000-12-23) introduced the abbreviation
232# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
233# See the file "australasia".
bd7414aa 234
9ffe4b14
SW
235# From Arthur David Olson, 2005-08-09
236# The following was signed into law on 2005-08-08.
237#
238# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
239# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
240# U.S.C. 260a(a)) is amended--
241# (1) by striking `first Sunday of April' and inserting `second
242# Sunday of March'; and
243# (2) by striking `last Sunday of October' and inserting `first
244# Sunday of November'.
245# (b) Effective Date- Subsection (a) shall take effect 1 year after the
246# date of enactment of this Act or March 1, 2007, whichever is later.
247# (c) Report to Congress- Not later than 9 months after the effective
248# date stated in subsection (b), the Secretary shall report to Congress
249# on the impact of this section on energy consumption in the United
250# States.
251# (d) Right to Revert- Congress retains the right to revert the
252# Daylight Saving Time back to the 2005 time schedules once the
253# Department study is complete.
984263bc
MD
254
255# US eastern time, represented by New York
256
257# Connecticut, Delaware, District of Columbia, most of Florida,
9ffe4b14
SW
258# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
259# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
984263bc
MD
260# New Hampshire, New Jersey, New York, North Carolina, Ohio,
261# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
262# Vermont, Virginia, West Virginia
263
bc95ec93
SW
264# From Dave Cantor (2004-11-02):
265# Early this summer I had the occasion to visit the Mount Washington
266# Observatory weather station atop (of course!) Mount Washington [, NH]....
267# One of the staff members said that the station was on Eastern Standard Time
268# and didn't change their clocks for Daylight Saving ... so that their
269# reports will always have times which are 5 hours behind UTC.
270
e1e23b59
SW
271# From Paul Eggert (2005-08-26):
272# According to today's Huntsville Times
273# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1>
274# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
275# in Russell County, Lanett in Chambers County and some towns in Lee County,
276# set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
277# Roberts, city administrator in Phenix City. as saying "We are in the Central
278# time zone, but we do go by the Eastern time zone because so many people work
bd7414aa 279# in Columbus."
e1e23b59 280
984263bc
MD
281# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
282Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
283Rule NYC 1920 only - Oct lastSun 2:00 0 S
284Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
285Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
286Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
287# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 288Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
984263bc
MD
289 -5:00 US E%sT 1920
290 -5:00 NYC E%sT 1942
291 -5:00 US E%sT 1946
292 -5:00 NYC E%sT 1967
293 -5:00 US E%sT
294
295# US central time, represented by Chicago
296
ba5ba9da
JR
297# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
298# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
299# Washington counties), Illinois, western Indiana
984263bc
MD
300# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
301# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
302# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
303# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
304# western Tennessee, most of Texas, Wisconsin
305
bd7414aa
SW
306# From Larry M. Smith (2006-04-26) re Wisconsin:
307# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
308# is currently enforced at the 01:00 time of change. Because the local
309# "bar time" in the state corresponds to 02:00, a number of citations
310# are issued for the "sale of class 'B' alcohol after prohibited
311# hours" within the deviated hour of this change every year....
8393cd87
SW
312#
313# From Douglas R. Bomberg (2007-03-12):
314# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
315# Statue 175 closer in synch with the US Congress' intent....
316# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
bd7414aa 317
984263bc
MD
318# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
319Rule Chicago 1920 only - Jun 13 2:00 1:00 D
320Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
321Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
322Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
323Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
324Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
325# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 326Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
984263bc
MD
327 -6:00 US C%sT 1920
328 -6:00 Chicago C%sT 1936 Mar 1 2:00
329 -5:00 - EST 1936 Nov 15 2:00
330 -6:00 Chicago C%sT 1942
331 -6:00 US C%sT 1946
332 -6:00 Chicago C%sT 1967
333 -6:00 US C%sT
334# Oliver County, ND switched from mountain to central time on 1992-10-25.
bc95ec93 335Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
984263bc
MD
336 -7:00 US M%sT 1992 Oct 25 02:00
337 -6:00 US C%sT
bd7414aa
SW
338# Morton County, ND, switched from mountain to central time on
339# 2003-10-26, except for the area around Mandan which was already central time.
340# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
341# Officially this switch also included part of Sioux County, and
342# Jones, Mellette, and Todd Counties in South Dakota;
343# but in practice these other counties were already observing central time.
344# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
345Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
346 -7:00 US M%sT 2003 Oct 26 02:00
347 -6:00 US C%sT
984263bc
MD
348
349# US mountain time, represented by Denver
350#
ba5ba9da 351# Colorado, far western Kansas, Montana, western
984263bc 352# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
0e49ec84 353# New Mexico, southwestern North Dakota,
984263bc
MD
354# western South Dakota, far western Texas (El Paso County, Hudspeth County,
355# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
356#
357# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
358Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
359Rule Denver 1920 only - Oct lastSun 2:00 0 S
360Rule Denver 1921 only - May 22 2:00 0 S
361Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
362Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
363# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 364Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
984263bc
MD
365 -7:00 US M%sT 1920
366 -7:00 Denver M%sT 1942
367 -7:00 US M%sT 1946
368 -7:00 Denver M%sT 1967
369 -7:00 US M%sT
370
371# US Pacific time, represented by Los Angeles
372#
ba5ba9da 373# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
0e49ec84
SW
374# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties,
375# and the northern three-quarters of Idaho county),
ba5ba9da 376# most of Nevada, most of Oregon, and Washington
984263bc
MD
377#
378# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
379Rule CA 1948 only - Mar 14 2:00 1:00 D
380Rule CA 1949 only - Jan 1 2:00 0 S
381Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
382Rule CA 1950 1961 - Sep lastSun 2:00 0 S
383Rule CA 1962 1966 - Oct lastSun 2:00 0 S
384# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 385Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
984263bc
MD
386 -8:00 US P%sT 1946
387 -8:00 CA P%sT 1967
388 -8:00 US P%sT
389
390# Alaska
391# AK%sT is the modern abbreviation for -9:00 per USNO.
392#
393# From Paul Eggert (2001-05-30):
394# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
395# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
396# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
397# also a Friday. Include only the time zone part of this transition,
398# ignoring the switch from Julian to Gregorian, since we can't represent
399# the Julian calendar.
400#
401# As far as we know, none of the exact locations mentioned below were
402# permanently inhabited in 1867 by anyone using either calendar.
403# (Yakutat was colonized by the Russians in 1799, but the settlement
404# was destroyed in 1805 by a Yakutat-kon war party.) However, there
405# were nearby inhabitants in some cases and for our purposes perhaps
406# it's best to simply use the official transition.
407#
408# Zone NAME GMTOFF RULES FORMAT [UNTIL]
409Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
410 -8:57:41 - LMT 1900 Aug 20 12:00
411 -8:00 - PST 1942
412 -8:00 US P%sT 1946
413 -8:00 - PST 1969
414 -8:00 US P%sT 1983 Oct 30 2:00
ba5ba9da 415 -9:00 US Y%sT 1983 Nov 30
984263bc
MD
416 -9:00 US AK%sT
417Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
418 -9:18:55 - LMT 1900 Aug 20 12:00
419 -9:00 - YST 1942
420 -9:00 US Y%sT 1946
421 -9:00 - YST 1969
ba5ba9da 422 -9:00 US Y%sT 1983 Nov 30
984263bc
MD
423 -9:00 US AK%sT
424Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
425 -9:59:36 - LMT 1900 Aug 20 12:00
426 -10:00 - CAT 1942
bd7414aa
SW
427 -10:00 US CAT/CAWT 1945 Aug 14 23:00u
428 -10:00 US CAT/CAPT 1946 # Peace
984263bc
MD
429 -10:00 - CAT 1967 Apr
430 -10:00 - AHST 1969
431 -10:00 US AH%sT 1983 Oct 30 2:00
ba5ba9da 432 -9:00 US Y%sT 1983 Nov 30
984263bc
MD
433 -9:00 US AK%sT
434Zone America/Nome 12:58:21 - LMT 1867 Oct 18
435 -11:01:38 - LMT 1900 Aug 20 12:00
436 -11:00 - NST 1942
437 -11:00 US N%sT 1946
438 -11:00 - NST 1967 Apr
439 -11:00 - BST 1969
440 -11:00 US B%sT 1983 Oct 30 2:00
ba5ba9da 441 -9:00 US Y%sT 1983 Nov 30
984263bc
MD
442 -9:00 US AK%sT
443Zone America/Adak 12:13:21 - LMT 1867 Oct 18
444 -11:46:38 - LMT 1900 Aug 20 12:00
445 -11:00 - NST 1942
446 -11:00 US N%sT 1946
447 -11:00 - NST 1967 Apr
448 -11:00 - BST 1969
449 -11:00 US B%sT 1983 Oct 30 2:00
ba5ba9da 450 -10:00 US AH%sT 1983 Nov 30
984263bc 451 -10:00 US HA%sT
bc95ec93
SW
452# The following switches don't quite make our 1970 cutoff.
453#
984263bc
MD
454# Shanks writes that part of southwest Alaska (e.g. Aniak)
455# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
456# and another part (e.g. Akiak) made the same switch five weeks later.
bc95ec93
SW
457#
458# From David Flater (2004-11-09):
459# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
460# Historic Preservation Commission, provided this information, which
461# suggests that Unalaska deviated from statutory time from early 1967
462# possibly until 1983:
463#
464# Minutes of the Unalaska City Council Meeting, January 10, 1967:
465# "Except for St. Paul and Akutan, Unalaska is the only important
466# location not on Alaska Standard Time. The following resolution was
467# made by William Robinson and seconded by Henry Swanson: Be it
468# resolved that the City of Unalaska hereby goes to Alaska Standard
469# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
470# January 14, Alaska Standard Time.) This resolution was passed with
471# three votes for and one against."
984263bc
MD
472
473# Hawaii
474#
475# From Arthur David Olson:
476# And then there's Hawaii.
477# DST was observed for one day in 1933;
478# standard time was changed by half an hour in 1947;
479# it's always standard as of 1986.
480#
481# From Paul Eggert:
482# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks.
483#
484Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00
485 -10:30 - HST 1933 Apr 30 2:00
486 -10:30 1:00 HDT 1933 May 21 2:00
487 -10:30 US H%sT 1947 Jun 8 2:00
488 -10:00 - HST
489
490# Now we turn to US areas that have diverged from the consensus since 1970.
491
492# Arizona mostly uses MST.
493
494# From Paul Eggert (2002-10-20):
495#
496# The information in the rest of this paragraph is derived from the
497# <a href="http://www.dlapr.lib.az.us/links/daylight.htm">
498# Daylight Saving Time web page (2002-01-23)</a> maintained by the
499# Arizona State Library, Archives and Public Records.
500# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
501# time, but by federal law railroads, airlines, bus lines, military
502# personnel, and some engaged in interstate commerce continued to
503# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
504# Gazette says that was the date the law changed, and that 04-01 was
505# the date the state's clocks would change. In 1945 the State of
506# Arizona used standard time all year, again with exceptions only as
507# mandated by federal law. Arizona observed DST in 1967, but Arizona
508# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
509#
510# Shanks says the 1944 experiment came to an end on 1944-03-17.
511# Go with the Arizona State Library instead.
512
bc95ec93 513Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42
984263bc
MD
514 -7:00 US M%sT 1944 Jan 1 00:01
515 -7:00 - MST 1944 Apr 1 00:01
516 -7:00 US M%sT 1944 Oct 1 00:01
517 -7:00 - MST 1967
518 -7:00 US M%sT 1968 Mar 21
519 -7:00 - MST
520# From Arthur David Olson (1988-02-13):
521# A writer from the Inter Tribal Council of Arizona, Inc.,
ba5ba9da 522# notes in private correspondence dated 1987-12-28 that "Presently, only the
984263bc
MD
523# Navajo Nation participates in the Daylight Saving Time policy, due to its
524# large size and location in three states." (The "only" means that other
525# tribal nations don't use DST.)
526
527Link America/Denver America/Shiprock
528
ba5ba9da
JR
529# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
530# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
531# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
532# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
0e49ec84
SW
533# Teton, Twin Falls, Valley, Washington counties, and the southern
534# quarter of Idaho county) and eastern Oregon (most of Malheur County)
ba5ba9da 535# switched four weeks late in 1974.
bc95ec93 536#
984263bc 537# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 538Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
984263bc
MD
539 -8:00 US P%sT 1923 May 13 2:00
540 -7:00 US M%sT 1974
541 -7:00 - MST 1974 Feb 3 2:00
542 -7:00 US M%sT
543
544# Indiana
545#
546# For a map of Indiana's time zone regions, see:
547# <a href="http://www.mccsc.edu/time.html">
548# What time is it in Indiana?
bd7414aa 549# </a> (2006-03-01)
9ffe4b14 550#
0e49ec84 551# From Paul Eggert (2007-08-17):
9ffe4b14
SW
552# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
553# with the following exceptions:
554#
555# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
556# Vandenburgh, and Warrick counties have been like America/Chicago.
557#
558# - Dearborn and Ohio counties have been like America/New_York.
559#
560# - Clark, Floyd, and Harrison counties have been like
561# America/Kentucky/Louisville.
562#
0e49ec84
SW
563# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
564# and Switzerland counties have their own time zone histories as noted below.
984263bc 565#
bd7414aa
SW
566# Shanks partitioned Indiana into 345 regions, each with its own time history,
567# and wrote ``Even newspaper reports present contradictory information.''
568# Those Hoosiers! Such a flighty and changeable people!
984263bc
MD
569# Fortunately, most of the complexity occurred before our cutoff date of 1970.
570#
984263bc
MD
571# Other than Indianapolis, the Indiana place names are so nondescript
572# that they would be ambiguous if we left them at the `America' level.
573# So we reluctantly put them all in a subdirectory `America/Indiana'.
984263bc 574
9ffe4b14 575# From Paul Eggert (2005-08-16):
bd7414aa
SW
576# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.
577
578# From Nathan Stratton Treadway (2006-03-30):
579# http://www.dot.gov/affairs/dot0406.htm [3705 B]
580# From Deborah Goldsmith (2006-01-18):
581# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]
582# From Paul Eggert (2006-01-20):
583# It says "DOT is relocating the time zone boundary in Indiana to move Starke,
584# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
585# Eastern Time Zone to the Central Time Zone.... The effective date of
586# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the
587# changeover date from standard time to Daylight Saving Time."
588# Strictly speaking, this means the affected counties will change their
589# clocks twice that night, but this obviously is in error. The intent
590# is that 01:59:59 EST be followed by 02:00:00 CDT.
984263bc 591
70fc4940
SW
592# From Gwillim Law (2007-02-10):
593# The Associated Press has been reporting that Pulaski County, Indiana is
594# going to switch from Central to Eastern Time on March 11, 2007....
595# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
596
984263bc
MD
597# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
598Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
599Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
600Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
601# Zone NAME GMTOFF RULES FORMAT [UNTIL]
9ffe4b14 602Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
984263bc
MD
603 -6:00 US C%sT 1920
604 -6:00 Indianapolis C%sT 1942
605 -6:00 US C%sT 1946
606 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
607 -5:00 - EST 1957 Sep 29 2:00
608 -6:00 - CST 1958 Apr 27 2:00
609 -5:00 - EST 1969
610 -5:00 US E%sT 1971
9ffe4b14
SW
611 -5:00 - EST 2006
612 -5:00 US E%sT
984263bc 613#
bd7414aa
SW
614# Eastern Crawford County, Indiana, left its clocks alone in 1974,
615# as well as from 1976 through 2005.
984263bc
MD
616# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
617Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
618Rule Marengo 1951 only - Sep lastSun 2:00 0 S
619Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
620Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
621# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 622Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
984263bc
MD
623 -6:00 US C%sT 1951
624 -6:00 Marengo C%sT 1961 Apr 30 2:00
625 -5:00 - EST 1969
626 -5:00 US E%sT 1974 Jan 6 2:00
627 -6:00 1:00 CDT 1974 Oct 27 2:00
628 -5:00 US E%sT 1976
9ffe4b14
SW
629 -5:00 - EST 2006
630 -5:00 US E%sT
984263bc 631#
0e49ec84
SW
632# Daviess, Dubois, Knox, and Martin Counties, Indiana,
633# switched from eastern to central time in April 2006, then switched back
634# in November 2007.
bd7414aa
SW
635# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
636Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
637Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
638Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
639Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
640Rule Vincennes 1955 only - May 1 0:00 1:00 D
641Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
642Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
643Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
644Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
645# Zone NAME GMTOFF RULES FORMAT [UNTIL]
646Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
647 -6:00 US C%sT 1946
648 -6:00 Vincennes C%sT 1964 Apr 26 2:00
649 -5:00 - EST 1969
650 -5:00 US E%sT 1971
651 -5:00 - EST 2006 Apr 2 2:00
0e49ec84
SW
652 -6:00 US C%sT 2007 Nov 4 2:00
653 -5:00 US E%sT
654#
655# Perry County, Indiana, switched from eastern to central time in April 2006.
656# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
657Rule Perry 1946 only - Apr lastSun 2:00 1:00 D
658Rule Perry 1946 only - Sep lastSun 2:00 0 S
659Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D
660Rule Perry 1953 1959 - Sep lastSun 2:00 0 S
661Rule Perry 1955 only - May 1 0:00 1:00 D
662Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
663Rule Perry 1960 only - Oct lastSun 2:00 0 S
664Rule Perry 1961 only - Sep lastSun 2:00 0 S
665Rule Perry 1962 1963 - Oct lastSun 2:00 0 S
666# Zone NAME GMTOFF RULES FORMAT [UNTIL]
667Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57
668 -6:00 US C%sT 1946
669 -6:00 Perry C%sT 1964 Apr 26 2:00
670 -5:00 - EST 1969
671 -5:00 US E%sT 1971
672 -5:00 - EST 2006 Apr 2 2:00
bd7414aa
SW
673 -6:00 US C%sT
674#
675# Pike County, Indiana moved from central to eastern time in 1977,
0e49ec84 676# then switched back in 2006, then switched back again in 2007.
bd7414aa
SW
677# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
678Rule Pike 1955 only - May 1 0:00 1:00 D
679Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
680Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
681Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
682# Zone NAME GMTOFF RULES FORMAT [UNTIL]
683Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
684 -6:00 US C%sT 1955
685 -6:00 Pike C%sT 1965 Apr 25 2:00
686 -5:00 - EST 1966 Oct 30 2:00
687 -6:00 US C%sT 1977 Oct 30 2:00
688 -5:00 - EST 2006 Apr 2 2:00
0e49ec84
SW
689 -6:00 US C%sT 2007 Nov 4 2:00
690 -5:00 US E%sT
bd7414aa
SW
691#
692# Starke County, Indiana moved from central to eastern time in 1991,
693# then switched back in 2006.
984263bc
MD
694# From Arthur David Olson (1991-10-28):
695# An article on page A3 of the Sunday, 1991-10-27 Washington Post
696# notes that Starke County switched from Central time to Eastern time as of
697# 1991-10-27.
698# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
699Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
700Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
701Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
702Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
703Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
704# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 705Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
984263bc
MD
706 -6:00 US C%sT 1947
707 -6:00 Starke C%sT 1962 Apr 29 2:00
708 -5:00 - EST 1963 Oct 27 2:00
709 -6:00 US C%sT 1991 Oct 27 2:00
bd7414aa
SW
710 -5:00 - EST 2006 Apr 2 2:00
711 -6:00 US C%sT
984263bc 712#
70fc4940
SW
713# Pulaski County, Indiana, switched from eastern to central time in
714# April 2006 and then switched back in March 2007.
715# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
716Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
717Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
718Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
719Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
720# Zone NAME GMTOFF RULES FORMAT [UNTIL]
721Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35
722 -6:00 US C%sT 1946
723 -6:00 Pulaski C%sT 1961 Apr 30 2:00
724 -5:00 - EST 1969
725 -5:00 US E%sT 1971
726 -5:00 - EST 2006 Apr 2 2:00
727 -6:00 US C%sT 2007 Mar 11 2:00
728 -5:00 US E%sT
729#
bd7414aa 730# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
984263bc 731# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 732Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
984263bc
MD
733 -6:00 US C%sT 1954 Apr 25 2:00
734 -5:00 - EST 1969
735 -5:00 US E%sT 1973
9ffe4b14
SW
736 -5:00 - EST 2006
737 -5:00 US E%sT
984263bc
MD
738
739# Part of Kentucky left its clocks alone in 1974.
9ffe4b14 740# This also includes Clark, Floyd, and Harrison counties in Indiana.
984263bc
MD
741# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
742Rule Louisville 1921 only - May 1 2:00 1:00 D
743Rule Louisville 1921 only - Sep 1 2:00 0 S
744Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
745Rule Louisville 1941 only - Sep lastSun 2:00 0 S
746Rule Louisville 1946 only - Jun 2 2:00 0 S
747Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
748Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
749# Zone NAME GMTOFF RULES FORMAT [UNTIL]
9ffe4b14 750Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
984263bc
MD
751 -6:00 US C%sT 1921
752 -6:00 Louisville C%sT 1942
753 -6:00 US C%sT 1946
754 -6:00 Louisville C%sT 1961 Jul 23 2:00
755 -5:00 - EST 1968
756 -5:00 US E%sT 1974 Jan 6 2:00
757 -6:00 1:00 CDT 1974 Oct 27 2:00
758 -5:00 US E%sT
984263bc 759#
bd7414aa 760# Wayne County, Kentucky
984263bc
MD
761#
762# From
763# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
764# Lake Cumberland LIFE
765# </a> (1999-01-29) via WKYM-101.7:
766# Clinton County has joined Wayne County in asking the DoT to change from
767# the Central to the Eastern time zone.... The Wayne County government made
768# the same request in December. And while Russell County officials have not
769# taken action, the majority of respondents to a poll conducted there in
770# August indicated they would like to change to "fast time" also.
771# The three Lake Cumberland counties are the farthest east of any U.S.
772# location in the Central time zone.
773#
774# From Rich Wales (2000-08-29):
775# After prolonged debate, and despite continuing deep differences of opinion,
776# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
777# (-0500) time. They won't "fall back" this year. See Sara Shipley,
778# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
779#
780# From Paul Eggert (2001-07-16):
781# The final rule was published in the
782# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
783# Federal Register 65, 160 (2000-08-17), page 50154-50158.
784# </a>
785#
bc95ec93 786Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
984263bc
MD
787 -6:00 US C%sT 1946
788 -6:00 - CST 1968
789 -6:00 US C%sT 2000 Oct 29 2:00
790 -5:00 US E%sT
791
792
793# From Rives McDow (2000-08-30):
794# Here ... are all the changes in the US since 1985.
795# Kearny County, KS (put all of county on central;
796# previously split between MST and CST) ... 1990-10
797# Starke County, IN (from CST to EST) ... 1991-10
798# Oliver County, ND (from MST to CST) ... 1992-10
799# West Wendover, NV (from PST TO MST) ... 1999-10
800# Wayne County, KY (from CST to EST) ... 2000-10
801#
802# From Paul Eggert (2001-07-17):
803# We don't know where the line used to be within Kearny County, KS,
804# so omit that change for now.
805# See America/Indiana/Knox for the Starke County, IN change.
806# See America/North_Dakota/Center for the Oliver County, ND change.
807# West Wendover, NV officially switched from Pacific to mountain time on
808# 1999-10-31. See the
809# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
810# Federal Register 64, 203 (1999-10-21), page 56705-56707.
811# </a>
812# However, the Federal Register says that West Wendover already operated
813# on mountain time, and the rule merely made this official;
814# hence a separate tz entry is not needed.
815
816# Michigan
817#
818# From Bob Devine (1988-01-28):
819# Michigan didn't observe DST from 1968 to 1973.
820#
821# From Paul Eggert (1999-03-31):
822# Shanks writes that Michigan started using standard time on 1885-09-18,
823# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
824# that Detroit kept
825#
826# local time until 1900 when the City Council decreed that clocks should
827# be put back twenty-eight minutes to Central Standard Time. Half the
828# city obeyed, half refused. After considerable debate, the decision
829# was rescinded and the city reverted to Sun time. A derisive offer to
830# erect a sundial in front of the city hall was referred to the
831# Committee on Sewers. Then, in 1905, Central time was adopted
832# by city vote.
833#
834# This story is too entertaining to be false, so go with Howse over Shanks.
835#
836# From Paul Eggert (2001-03-06):
837# Garland (1927) writes ``Cleveland and Detroit advanced their clocks
838# one hour in 1914.'' This change is not in Shanks. We have no more
839# info, so omit this for now.
840#
841# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
842# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
843Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
844Rule Detroit 1948 only - Sep lastSun 2:00 0 S
845Rule Detroit 1967 only - Jun 14 2:00 1:00 D
846Rule Detroit 1967 only - Oct lastSun 2:00 0 S
847# Zone NAME GMTOFF RULES FORMAT [UNTIL]
848Zone America/Detroit -5:32:11 - LMT 1905
849 -6:00 - CST 1915 May 15 2:00
850 -5:00 - EST 1942
851 -5:00 US E%sT 1946
852 -5:00 Detroit E%sT 1973
853 -5:00 US E%sT 1975
854 -5:00 - EST 1975 Apr 27 2:00
855 -5:00 US E%sT
856#
bd7414aa
SW
857# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
858# switched from EST to CST/CDT in 1973.
984263bc
MD
859# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
860Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
861Rule Menominee 1946 only - Sep lastSun 2:00 0 S
862Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
863Rule Menominee 1966 only - Oct lastSun 2:00 0 S
864# Zone NAME GMTOFF RULES FORMAT [UNTIL]
865Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
866 -6:00 US C%sT 1946
867 -6:00 Menominee C%sT 1969 Apr 27 2:00
868 -5:00 - EST 1973 Apr 29 2:00
869 -6:00 US C%sT
870
871# Navassa
872# administered by the US Fish and Wildlife Service
873# claimed by US under the provisions of the 1856 Guano Islands Act
874# also claimed by Haiti
875# occupied 1857/1900 by the Navassa Phosphate Co
876# US lighthouse 1917/1996-09
877# currently uninhabited
878# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
879# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
880# Jimmy Skaggs, _The Great Guano Rush_ (1994).
881
984263bc
MD
882################################################################################
883
884
bd7414aa
SW
885# From Paul Eggert (2006-03-22):
886# A good source for time zone historical data outside the U.S. is
887# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
888# San Diego: ACS Publications, Inc. (2003).
984263bc
MD
889#
890# Gwillim Law writes that a good source
891# for recent time zone data is the International Air Transport
892# Association's Standard Schedules Information Manual (IATA SSIM),
893# published semiannually. Law sent in several helpful summaries
894# of the IATA's data after 1990.
895#
bd7414aa
SW
896# Except where otherwise noted, Shanks & Pottenger is the source for
897# entries through 1990, and IATA SSIM is the source for entries afterwards.
984263bc 898#
ba5ba9da
JR
899# Other sources occasionally used include:
900#
901# Edward W. Whitman, World Time Differences,
902# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
903# which I found in the UCLA library.
904#
905# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
906# William Willett, The Waste of Daylight, 19th edition
907# </a> (1914-03)
984263bc
MD
908#
909# See the `europe' file for Greenland.
910
911# Canada
912
9ffe4b14 913# From Alain LaBont<e'> (1994-11-14):
984263bc
MD
914# I post here the time zone abbreviations standardized in Canada
915# for both English and French in the CAN/CSA-Z234.4-89 standard....
916#
917# UTC Standard time Daylight savings time
918# offset French English French English
919# -2:30 - - HAT NDT
920# -3 - - HAA ADT
921# -3:30 HNT NST - -
922# -4 HNA AST HAE EDT
923# -5 HNE EST HAC CDT
924# -6 HNC CST HAR MDT
925# -7 HNR MST HAP PDT
926# -8 HNP PST HAY YDT
927# -9 HNY YST - -
928#
929# HN: Heure Normale ST: Standard Time
930# HA: Heure Avanc<e'>e DT: Daylight saving Time
931#
932# A: de l'Atlantique Atlantic
933# C: du Centre Central
934# E: de l'Est Eastern
935# M: Mountain
936# N: Newfoundland
937# P: du Pacifique Pacific
938# R: des Rocheuses
939# T: de Terre-Neuve
940# Y: du Yukon Yukon
941#
bc95ec93 942# From Paul Eggert (1994-11-22):
984263bc
MD
943# Alas, this sort of thing must be handled by localization software.
944
bd7414aa
SW
945# Unless otherwise specified, the data for Canada are all from Shanks
946# & Pottenger.
947
8393cd87
SW
948# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
949# 2007-03-01):
bd7414aa
SW
950# The British Columbia government announced yesterday that it will
951# adjust daylight savings next year to align with changes in the
952# U.S. and the rest of Canada....
953# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
70fc4940
SW
954# ...
955# Nova Scotia
bd7414aa 956# Daylight saving time will be extended by four weeks starting in 2007....
70fc4940
SW
957# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
958#
bd7414aa
SW
959# [For New Brunswick] the new legislation dictates that the time change is to
960# be done at 02:00 instead of 00:01.
961# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
962# ...
963# Manitoba has traditionally changed the clock every fall at 03:00.
964# As of 2006, the transition is to take place one hour earlier at 02:00.
965# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
966# ...
967# [Alberta, Ontario, Quebec] will follow US rules.
70fc4940 968# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
bd7414aa 969# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
70fc4940
SW
970# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
971# ...
972# P.E.I. will follow US rules....
973# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
bd7414aa 974# ...
70fc4940
SW
975# Province of Newfoundland and Labrador....
976# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
bd7414aa 977# ...
70fc4940
SW
978# Yukon
979# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
bd7414aa
SW
980# ...
981# N.W.T. will follow US rules. Whoever maintains the government web site
982# does not seem to believe in bookmarks. To see the news release, click the
983# following link and search for "Daylight Savings Time Change". Press the
984# "Daylight Savings Time Change" link; it will fire off a popup using
985# JavaScript.
986# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
70fc4940 987# ...
8393cd87
SW
988# Nunavut
989# An amendment to the Interpretation Act was registered on February 19/2007....
990# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
bd7414aa
SW
991
992# From Paul Eggert (2006-04-25):
984263bc 993# H. David Matthews and Mary Vincent's map
34850bd5 994# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">
984263bc
MD
995# "It's about TIME", _Canadian Geographic_ (September-October 1998)
996# </a> contains detailed boundaries for regions observing nonstandard
997# time and daylight saving time arrangements in Canada circa 1998.
998#
34850bd5
SW
999# INMS, the Institute for National Measurement Standards in Ottawa, has <a
1000# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">
984263bc
MD
1001# information about standard and daylight saving time zones in Canada.
1002# </a> (updated periodically).
1003# Its unofficial information is often taken from Matthews and Vincent.
bd7414aa
SW
1004
1005# From Paul Eggert (2006-06-27):
1006# For now, assume all of DST-observing Canada will fall into line with the
1007# new US DST rules,
984263bc
MD
1008
1009# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1010Rule Canada 1918 only - Apr 14 2:00 1:00 D
1011Rule Canada 1918 only - Oct 31 2:00 0 S
ba5ba9da
JR
1012Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
1013Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
984263bc
MD
1014Rule Canada 1945 only - Sep 30 2:00 0 S
1015Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
34850bd5
SW
1016Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1017Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1018Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1019Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
984263bc
MD
1020
1021
bd7414aa 1022# Newfoundland and Labrador
984263bc
MD
1023
1024# From Paul Eggert (2000-10-02):
1025# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1026# but the only part of Labrador that follows the rules is the
1027# southeast corner, including Port Hope Simpson and Mary's Harbour,
1028# but excluding, say, Black Tickle.
1029
1030# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
ba5ba9da 1031Rule StJohns 1917 only - Apr 8 2:00 1:00 D
984263bc 1032Rule StJohns 1917 only - Sep 17 2:00 0 S
bd7414aa 1033# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
984263bc
MD
1034Rule StJohns 1919 only - May 5 23:00 1:00 D
1035Rule StJohns 1919 only - Aug 12 23:00 0 S
bd7414aa 1036# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
984263bc
MD
1037Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
1038Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
bd7414aa
SW
1039# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1040# Pottenger.
ba5ba9da
JR
1041Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
1042Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
1043# Whitman gives the following transitions:
1044# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
bd7414aa 1045# but go with Shanks & Pottenger and assume they used Canadian rules.
984263bc 1046# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
bd7414aa 1047# Apr 30 - Sep 24; go with Shanks & Pottenger.
984263bc
MD
1048Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
1049Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
1050Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
1051Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
1052Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
1053# From Paul Eggert (2000-10-02):
1054# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1055# at 00:01 local time. For now, assume it started in 1987.
1056Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
bd7414aa 1057Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
984263bc 1058Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
bd7414aa
SW
1059Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1060Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D
1061Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S
1062#
984263bc
MD
1063# St John's has an apostrophe, but Posix file names can't have apostrophes.
1064# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1065Zone America/St_Johns -3:30:52 - LMT 1884
ba5ba9da
JR
1066 -3:30:52 StJohns N%sT 1918
1067 -3:30:52 Canada N%sT 1919
984263bc 1068 -3:30:52 StJohns N%sT 1935 Mar 30
ba5ba9da
JR
1069 -3:30 StJohns N%sT 1942 May 11
1070 -3:30 Canada N%sT 1946
984263bc
MD
1071 -3:30 StJohns N%sT
1072
984263bc
MD
1073# most of east Labrador
1074
1075# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
1076# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1077Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
ba5ba9da
JR
1078 -3:30:52 - NST 1918
1079 -3:30:52 Canada N%sT 1919
984263bc
MD
1080 -3:30:52 - NST 1935 Mar 30
1081 -3:30 - NST 1936
ba5ba9da
JR
1082 -3:30 StJohns N%sT 1942 May 11
1083 -3:30 Canada N%sT 1946
984263bc
MD
1084 -3:30 StJohns N%sT 1966 Mar 15 2:00
1085 -4:00 StJohns A%sT
1086
1087
bd7414aa 1088# west Labrador, Nova Scotia, Prince Edward I
984263bc 1089
bd7414aa
SW
1090# From Paul Eggert (2006-03-22):
1091# Shanks & Pottenger write that since 1970 most of this region has been like
1092# Halifax. Many locales did not observe peacetime DST until 1972;
984263bc 1093# Glace Bay, NS is the largest that we know of.
bd7414aa
SW
1094# Shanks & Pottenger also write that Liverpool, NS was the only town
1095# in Canada to observe DST in 1971 but not 1970; for now we'll assume
1096# this is a typo.
984263bc
MD
1097
1098# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
bd7414aa
SW
1099Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1100Rule Halifax 1916 only - Oct 1 0:00 0 S
1101Rule Halifax 1920 only - May 9 0:00 1:00 D
1102Rule Halifax 1920 only - Aug 29 0:00 0 S
1103Rule Halifax 1921 only - May 6 0:00 1:00 D
1104Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1105Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1106Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1107Rule Halifax 1923 only - Sep 4 0:00 0 S
1108Rule Halifax 1924 only - Sep 15 0:00 0 S
1109Rule Halifax 1925 only - Sep 28 0:00 0 S
1110Rule Halifax 1926 only - May 16 0:00 1:00 D
1111Rule Halifax 1926 only - Sep 13 0:00 0 S
1112Rule Halifax 1927 only - May 1 0:00 1:00 D
1113Rule Halifax 1927 only - Sep 26 0:00 0 S
1114Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
1115Rule Halifax 1928 only - Sep 9 0:00 0 S
1116Rule Halifax 1929 only - Sep 3 0:00 0 S
1117Rule Halifax 1930 only - Sep 15 0:00 0 S
1118Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
1119Rule Halifax 1932 only - May 1 0:00 1:00 D
1120Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1121Rule Halifax 1933 only - Oct 2 0:00 0 S
1122Rule Halifax 1934 only - May 20 0:00 1:00 D
1123Rule Halifax 1934 only - Sep 16 0:00 0 S
1124Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1125Rule Halifax 1935 only - Sep 30 0:00 0 S
1126Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1127Rule Halifax 1936 only - Sep 14 0:00 0 S
1128Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1129Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1130Rule Halifax 1939 only - May 28 0:00 1:00 D
1131Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1132Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1133Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1134Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1135Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1136Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1137Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1138Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1139Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
984263bc
MD
1140# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1141Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
ba5ba9da
JR
1142 -4:00 Halifax A%sT 1918
1143 -4:00 Canada A%sT 1919
1144 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1145 -4:00 Canada A%sT 1946
1146 -4:00 Halifax A%sT 1974
1147 -4:00 Canada A%sT
984263bc
MD
1148Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1149 -4:00 Canada A%sT 1953
1150 -4:00 Halifax A%sT 1954
1151 -4:00 - AST 1972
ba5ba9da
JR
1152 -4:00 Halifax A%sT 1974
1153 -4:00 Canada A%sT
984263bc 1154
bd7414aa 1155# New Brunswick
984263bc 1156
70fc4940
SW
1157# From Paul Eggert (2007-01-31):
1158# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1159# says they changed at 00:01 through 2006, and
bd7414aa 1160# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
70fc4940 1161# clear that this was the case since at least 1993.
bd7414aa 1162# For now, assume it started in 1993.
984263bc 1163
bd7414aa
SW
1164# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1165Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1166Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1167Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1168Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1169Rule Moncton 1939 only - May 27 1:00 1:00 D
1170Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1171Rule Moncton 1940 only - May 19 1:00 1:00 D
1172Rule Moncton 1941 only - May 4 1:00 1:00 D
1173Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1174Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1175Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1176Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1177Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1178# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1179Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1180 -5:00 - EST 1902 Jun 15
1181 -4:00 Canada A%sT 1933
1182 -4:00 Moncton A%sT 1942
1183 -4:00 Canada A%sT 1946
1184 -4:00 Moncton A%sT 1973
1185 -4:00 Canada A%sT 1993
1186 -4:00 Moncton A%sT 2007
1187 -4:00 Canada A%sT
1188
1189# Quebec
1190
1191# From Paul Eggert (2006-07-09):
1192# Shanks & Pottenger write that since 1970 most of Quebec has been
1193# like Montreal.
1194
1195# From Paul Eggert (2006-06-27):
1196# Matthews and Vincent (1998) also write that Quebec east of the -63
1197# meridian is supposed to observe AST, but residents as far east as
1198# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1199# In "Official time in Quebec" the Quebec department of justice writes in
1200# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm
1201# that "The residents of the Municipality of the
1202# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin,
1203# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is
1204# written and use Atlantic standard time all year round. The same applies to
1205# the residents of the Native facilities along the lower North Shore."
1206# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm>
1207# says this common practice was codified into law as of 2007.
1208# For lack of better info, guess this practice began around 1970, contra to
1209# Shanks & Pottenger who have this region observing AST/ADT.
1210
1211# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1212Rule Mont 1917 only - Mar 25 2:00 1:00 D
1213Rule Mont 1917 only - Apr 24 0:00 0 S
1214Rule Mont 1919 only - Mar 31 2:30 1:00 D
1215Rule Mont 1919 only - Oct 25 2:30 0 S
1216Rule Mont 1920 only - May 2 2:30 1:00 D
1217Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S
1218Rule Mont 1921 only - May 1 2:00 1:00 D
1219Rule Mont 1922 only - Apr 30 2:00 1:00 D
1220Rule Mont 1924 only - May 17 2:00 1:00 D
1221Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
1222Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
1223# The 1927-to-1937 rules can be expressed more simply as
1224# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D
1225# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S
1226# The rules below avoid use of 24:00
1227# (which pre-1998 versions of zic cannot handle).
1228Rule Mont 1927 only - May 1 0:00 1:00 D
1229Rule Mont 1927 1932 - Sep lastSun 0:00 0 S
1230Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D
1231Rule Mont 1932 only - May 1 0:00 1:00 D
1232Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D
1233Rule Mont 1933 only - Oct 1 0:00 0 S
1234Rule Mont 1934 1939 - Sep lastSun 0:00 0 S
1235Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D
1236Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
1237Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
1238Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
1239Rule Mont 1957 1973 - Oct lastSun 2:00 0 S
1240
1241# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1242Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1243 -4:00 Canada A%sT 1970
1244 -4:00 - AST
1245Zone America/Montreal -4:54:16 - LMT 1884
1246 -5:00 Mont E%sT 1918
1247 -5:00 Canada E%sT 1919
1248 -5:00 Mont E%sT 1942 Feb 9 2:00s
1249 -5:00 Canada E%sT 1946
1250 -5:00 Mont E%sT 1974
1251 -5:00 Canada E%sT
1252
1253
1254# Ontario
1255
1256# From Paul Eggert (2006-07-09):
1257# Shanks & Pottenger write that since 1970 most of Ontario has been like
1258# Toronto.
984263bc
MD
1259# Thunder Bay skipped DST in 1973.
1260# Many smaller locales did not observe peacetime DST until 1974;
1261# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1262# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1263
ba5ba9da
JR
1264# From Mark Brader (2003-07-26):
1265# [According to the Toronto Star] Orillia, Ontario, adopted DST
1266# effective Saturday, 1912-06-22, 22:00; the article mentions that
1267# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1268# have already done so. In Orillia DST was to run until Saturday,
1269# 1912-08-31 (no time mentioned), but it was met with considerable
1270# hostility from certain segments of the public, and was revoked after
1271# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but
1272# presumably that should be -07-06. (1912-06-19, -07-12; also letters
1273# earlier in June).
1274#
1275# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1276
984263bc 1277# From Paul Eggert (1997-10-17):
ba5ba9da 1278# Mark Brader writes that an article in the 1997-10-14 Toronto Star
984263bc
MD
1279# says that Atikokan, Ontario currently does not observe DST,
1280# but will vote on 11-10 whether to use EST/EDT.
1281# He also writes that the
1282# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
1283# Ontario Time Act (1990, Chapter T.9)
1284# </a>
1285# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1286# Officially Atikokan is therefore on CST/CDT, and most likely this report
1287# concerns a non-official time observed as a matter of local practice.
bd7414aa 1288#
984263bc
MD
1289# From Paul Eggert (2000-10-02):
1290# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1291# New Osnaburgh observe CST all year, that Big Trout Lake observes
1292# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1293# violation of the official Ontario rules.
bd7414aa
SW
1294#
1295# From Paul Eggert (2006-07-09):
1296# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1297# 2005-07-21 Chronicle-Journal, which said:
1298#
1299# The clocks in Atikokan stay set on standard time year-round.
1300# This means they spend about half the time on central time and
1301# the other half on eastern time.
1302#
1303# For the most part, the system works, Mayor Dennis Brown said.
1304#
1305# "The majority of businesses in Atikokan deal more with Eastern
1306# Canada, but there are some that deal with Western Canada," he
1307# said. "I don't see any changes happening here."
1308#
1309# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1310# [New Osnaburgh] follow the same practice."
984263bc 1311
bd7414aa
SW
1312# From Garry McKinnon (2006-07-14) via Chris Walton:
1313# I chatted with a member of my board who has an outstanding memory
1314# and a long history in Atikokan (and in the telecom industry) and he
1315# can say for certain that Atikokan has been practicing the current
1316# time keeping since 1952, at least.
ba5ba9da 1317
bd7414aa
SW
1318# From Paul Eggert (2006-07-17):
1319# Shanks & Pottenger say that Atikokan has agreed with Rainy River
1320# ever since standard time was introduced, but the information from
1321# McKinnon sounds more authoritative. For now, assume that Atikokan
1322# switched to EST immediately after WWII era daylight saving time
1323# ended. This matches the old (less-populous) America/Coral_Harbour
1324# entry since our cutoff date of 1970, so we can move
1325# America/Coral_Harbour to the 'backward' file.
1326
1327# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
ba5ba9da
JR
1328Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1329Rule Toronto 1919 only - Oct 26 0:00 0 S
1330Rule Toronto 1920 only - May 2 2:00 1:00 D
1331Rule Toronto 1920 only - Sep 26 0:00 0 S
1332Rule Toronto 1921 only - May 15 2:00 1:00 D
1333Rule Toronto 1921 only - Sep 15 2:00 0 S
1334Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
bd7414aa
SW
1335# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1336# was meant.
ba5ba9da
JR
1337Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1338Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1339# The 1927-to-1939 rules can be expressed more simply as
1340# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1341# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1342# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1343# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1344# The rules below avoid use of Sun>=25
1345# (which pre-2004 versions of zic cannot handle).
1346Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S
1347Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D
1348Rule Toronto 1932 only - May 1 2:00 1:00 D
1349Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D
1350Rule Toronto 1933 only - Oct 1 2:00 0 S
1351Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S
1352Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
1353Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
1354Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
1355Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S
1356Rule Toronto 1949 only - Nov lastSun 0:00 0 S
1357Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
1358Rule Toronto 1950 only - Nov lastSun 2:00 0 S
1359Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
bd7414aa
SW
1360# Shanks & Pottenger say Toronto ended DST a week early in 1971,
1361# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1362# is wrong, and that he had confirmed it by checking the 1971-10-30
1363# Toronto Star, which said that DST was ending 1971-10-31 as usual.
ba5ba9da
JR
1364Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1365
1366# From Paul Eggert (2003-07-27):
1367# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1368# Port Arthur, Ontario, the principle of the Bill has been in
1369# operation for the past three years, and in the City of Moose Jaw,
1370# Saskatchewan, for one year."
1371
1372# From David Bryan via Tory Tronrud, Director/Curator,
1373# Thunder Bay Museum (2003-11-12):
1374# There is some suggestion, however, that, by-law or not, daylight
1375# savings time was being practiced in Fort William and Port Arthur
1376# before 1909.... [I]n 1910, the line between the Eastern and Central
1377# Time Zones was permanently moved about two hundred miles west to
1378# include the Thunder Bay area.... When Canada adopted daylight
1379# savings time in 1916, Fort William and Port Arthur, having done so
1380# already, did not change their clocks.... During the Second World
1381# War,... [t]he cities agreed to implement DST during the summer
1382# months for the remainder of the war years.
1383
984263bc 1384# Zone NAME GMTOFF RULES FORMAT [UNTIL]
ba5ba9da
JR
1385Zone America/Toronto -5:17:32 - LMT 1895
1386 -5:00 Canada E%sT 1919
1387 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1388 -5:00 Canada E%sT 1946
1389 -5:00 Toronto E%sT 1974
1390 -5:00 Canada E%sT
984263bc 1391Zone America/Thunder_Bay -5:57:00 - LMT 1895
ba5ba9da
JR
1392 -6:00 - CST 1910
1393 -5:00 - EST 1942
984263bc
MD
1394 -5:00 Canada E%sT 1970
1395 -5:00 Mont E%sT 1973
1396 -5:00 - EST 1974
1397 -5:00 Canada E%sT
1398Zone America/Nipigon -5:53:04 - LMT 1895
ba5ba9da
JR
1399 -5:00 Canada E%sT 1940 Sep 29
1400 -5:00 1:00 EDT 1942 Feb 9 2:00s
984263bc 1401 -5:00 Canada E%sT
bd7414aa 1402Zone America/Rainy_River -6:18:16 - LMT 1895
ba5ba9da
JR
1403 -6:00 Canada C%sT 1940 Sep 29
1404 -6:00 1:00 CDT 1942 Feb 9 2:00s
984263bc 1405 -6:00 Canada C%sT
bd7414aa
SW
1406Zone America/Atikokan -6:06:28 - LMT 1895
1407 -6:00 Canada C%sT 1940 Sep 29
1408 -6:00 1:00 CDT 1942 Feb 9 2:00s
1409 -6:00 Canada C%sT 1945 Sep 30 2:00
1410 -5:00 - EST
984263bc
MD
1411
1412
1413# Manitoba
1414
bd7414aa
SW
1415# From Rob Douglas (2006-04-06):
1416# the old Manitoba Time Act - as amended by Bill 2, assented to
1417# March 27, 1987 ... said ...
1418# "between two o'clock Central Standard Time in the morning of
1419# the first Sunday of April of each year and two o'clock Central
1420# Standard Time in the morning of the last Sunday of October next
1421# following, one hour in advance of Central Standard Time."...
1422# I believe that the English legislation [of the old time act] had =
1423# been assented to (March 22, 1967)....
1424# Also, as far as I can tell, there was no order-in-council varying
1425# the time of Daylight Saving Time for 2005 and so the provisions of
1426# the 1987 version would apply - the changeover was at 2:00 Central
1427# Standard Time (i.e. not until 3:00 Central Daylight Time).
1428
1429# From Paul Eggert (2006-04-10):
1430# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1431# starting 1966. Since 02:00s is clearly correct for 1967 on, assume
1432# it was also 02:00s in 1966.
1433
984263bc
MD
1434# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1435Rule Winn 1916 only - Apr 23 0:00 1:00 D
1436Rule Winn 1916 only - Sep 17 0:00 0 S
1437Rule Winn 1918 only - Apr 14 2:00 1:00 D
1438Rule Winn 1918 only - Oct 31 2:00 0 S
1439Rule Winn 1937 only - May 16 2:00 1:00 D
1440Rule Winn 1937 only - Sep 26 2:00 0 S
ba5ba9da
JR
1441Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1442Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
984263bc
MD
1443Rule Winn 1945 only - Sep lastSun 2:00 0 S
1444Rule Winn 1946 only - May 12 2:00 1:00 D
1445Rule Winn 1946 only - Oct 13 2:00 0 S
1446Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1447Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1448Rule Winn 1950 only - May 1 2:00 1:00 D
1449Rule Winn 1950 only - Sep 30 2:00 0 S
1450Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1451Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1452Rule Winn 1959 only - Oct lastSun 2:00 0 S
1453Rule Winn 1960 only - Sep lastSun 2:00 0 S
1454Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1455Rule Winn 1963 only - Sep 22 2:00 0 S
bd7414aa
SW
1456Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1457Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1458Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
984263bc
MD
1459# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1460Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
bd7414aa
SW
1461 -6:00 Winn C%sT 2006
1462 -6:00 Canada C%sT
984263bc
MD
1463
1464
1465# Saskatchewan
1466
ba5ba9da
JR
1467# From Mark Brader (2003-07-26):
1468# The first actual adoption of DST in Canada was at the municipal
1469# level. As the [Toronto] Star put it (1912-06-07), "While people
1470# elsewhere have long been talking of legislation to save daylight,
1471# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1472# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1473# presumably late evening, as below), and would run until "the end of
1474# the summer". The discrepancy between municipal time and railroad
1475# time was noted.
1476
1477# From Paul Eggert (2003-07-27):
1478# Willett (1914-03) notes that DST "has been in operation ... in the
1479# City of Moose Jaw, Saskatchewan, for one year."
1480
bd7414aa
SW
1481# From Paul Eggert (2006-03-22):
1482# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
984263bc
MD
1483# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1484# Other western towns (e.g. Lloydminster) are like Edmonton.
1485# Matthews and Vincent (1998) write that Denare Beach and Creighton
1486# are like Winnipeg, in violation of Saskatchewan law.
1487
9ffe4b14 1488# From W. Jones (1992-11-06):
984263bc
MD
1489# The. . .below is based on information I got from our law library, the
1490# provincial archives, and the provincial Community Services department.
1491# A precise history would require digging through newspaper archives, and
1492# since you didn't say what you wanted, I didn't bother.
1493#
1494# Saskatchewan is split by a time zone meridian (105W) and over the years
1495# the boundary became pretty ragged as communities near it reevaluated
1496# their affiliations in one direction or the other. In 1965 a provincial
1497# referendum favoured legislating common time practices.
1498#
1499# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1500# Saskatchewan 1978) was proclaimed, and established that the eastern
1501# part of Saskatchewan would use CST year round, that districts in
1502# northwest Saskatchewan would by default follow CST but could opt to
1503# follow Mountain Time rules (thus 1 hour difference in the winter and
1504# zero in the summer), and that districts in southwest Saskatchewan would
1505# by default follow MT but could opt to follow CST.
1506#
1507# It took a few years for the dust to settle (I know one story of a town
1508# on one time zone having its school in another, such that a mom had to
1509# serve her family lunch in two shifts), but presently it seems that only
1510# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1511# rules any more; all other districts appear to have used CST year round
1512# since sometime in the 1960s.
1513
bd7414aa
SW
1514# From Chris Walton (2006-06-26):
1515# The Saskatchewan time act which was last updated in 1996 is about 30 pages
1516# long and rather painful to read.
1517# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1518
984263bc
MD
1519# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1520Rule Regina 1918 only - Apr 14 2:00 1:00 D
1521Rule Regina 1918 only - Oct 31 2:00 0 S
1522Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
1523Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1524Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1525Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1526Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1527Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
ba5ba9da
JR
1528Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1529Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
984263bc
MD
1530Rule Regina 1945 only - Sep lastSun 2:00 0 S
1531Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1532Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
ba5ba9da
JR
1533Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1534Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1535Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
984263bc
MD
1536Rule Regina 1959 only - Oct lastSun 2:00 0 S
1537#
1538Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1539Rule Swift 1957 only - Oct lastSun 2:00 0 S
1540Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1541Rule Swift 1959 only - Oct lastSun 2:00 0 S
1542Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1543# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1544Zone America/Regina -6:58:36 - LMT 1905 Sep
1545 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1546 -6:00 - CST
1547Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1548 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1549 -7:00 Regina M%sT 1950
1550 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1551 -6:00 - CST
1552
1553
1554# Alberta
1555
1556# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1557Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1558Rule Edm 1918 only - Oct 31 2:00 0 S
1559Rule Edm 1919 only - May 27 2:00 0 S
1560Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1561Rule Edm 1920 only - Oct lastSun 2:00 0 S
1562Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
ba5ba9da
JR
1563Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1564Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
984263bc
MD
1565Rule Edm 1945 only - Sep lastSun 2:00 0 S
1566Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1567Rule Edm 1947 only - Sep lastSun 2:00 0 S
1568Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1569Rule Edm 1967 only - Oct lastSun 2:00 0 S
1570Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1571Rule Edm 1969 only - Oct lastSun 2:00 0 S
1572Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
bd7414aa 1573Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
984263bc
MD
1574# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1575Zone America/Edmonton -7:33:52 - LMT 1906 Sep
bd7414aa
SW
1576 -7:00 Edm M%sT 1987
1577 -7:00 Canada M%sT
984263bc
MD
1578
1579
1580# British Columbia
1581
bd7414aa
SW
1582# From Paul Eggert (2006-03-22):
1583# Shanks & Pottenger write that since 1970 most of this region has
1584# been like Vancouver.
984263bc
MD
1585# Dawson Creek uses MST. Much of east BC is like Edmonton.
1586# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1587
1588# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1589Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1590Rule Vanc 1918 only - Oct 31 2:00 0 S
ba5ba9da
JR
1591Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1592Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
984263bc
MD
1593Rule Vanc 1945 only - Sep 30 2:00 0 S
1594Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1595Rule Vanc 1946 only - Oct 13 2:00 0 S
1596Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
bd7414aa 1597Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
984263bc
MD
1598# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1599Zone America/Vancouver -8:12:28 - LMT 1884
bd7414aa
SW
1600 -8:00 Vanc P%sT 1987
1601 -8:00 Canada P%sT
984263bc
MD
1602Zone America/Dawson_Creek -8:00:56 - LMT 1884
1603 -8:00 Canada P%sT 1947
1604 -8:00 Vanc P%sT 1972 Aug 30 2:00
1605 -7:00 - MST
1606
1607
1608# Northwest Territories, Nunavut, Yukon
1609
bd7414aa 1610# From Paul Eggert (2006-03-22):
984263bc 1611# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
9ffe4b14 1612# Mathew Englander (1996-10-07) gives the following refs:
984263bc
MD
1613# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1614# c. 7 defines Yukon standard time as UTC-9. This is still valid;
1615# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1616# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1617# * O.I.C. 1980/02 established DST.
1618# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
bd7414aa
SW
1619# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go
1620# with Englander.
1621# From Chris Walton (2006-06-26):
1622# Here is a link to the old daylight saving portion of the interpretation
1623# act which was last updated in 1987:
1624# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf
984263bc
MD
1625
1626# From Rives McDow (1999-09-04):
1627# Nunavut ... moved ... to incorporate the whole territory into one time zone.
1628# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
1629# Nunavut moves to single time zone Oct. 31
1630# </a>
1631#
1632# From Antoine Leca (1999-09-06):
1633# We then need to create a new timezone for the Kitikmeot region of Nunavut
1634# to differentiate it from the Yellowknife region.
1635
1636# From Paul Eggert (1999-09-20):
1637# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
1638# Basic Facts: The New Territory
1639# </a> (1999) reports that Pangnirtung operates on eastern time,
1640# and that Coral Harbour does not observe DST. We don't know when
1641# Pangnirtung switched to eastern time; we'll guess 1995.
984263bc
MD
1642
1643# From Rives McDow (1999-11-08):
1644# On October 31, when the rest of Nunavut went to Central time,
1645# Pangnirtung wobbled. Here is the result of their wobble:
1646#
1647# The following businesses and organizations in Pangnirtung use Central Time:
1648#
1649# First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
1650# Eastern Arctic National Parks, A & D Specialist
1651#
1652# The following businesses and organizations in Pangnirtung use Eastern Time:
1653#
1654# Hamlet office, All other businesses, Both schools, Airport operator
1655#
1656# This has made for an interesting situation there, which warranted the news.
1657# No one there that I spoke with seems concerned, or has plans to
1658# change the local methods of keeping time, as it evidently does not
1659# really interfere with any activities or make things difficult locally.
1660# They plan to celebrate New Year's turn-over twice, one hour apart,
1661# so it appears that the situation will last at least that long.
1662# The Nunavut Intergovernmental Affairs hopes that they will "come to
1663# their senses", but the locals evidently don't see any problem with
1664# the current state of affairs.
1665
1666# From Michaela Rodrigue, writing in the
1667# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
1668# Nunatsiaq News (1999-11-19)</a>:
1669# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
1670# central - or Nunavut time - for government offices, and eastern time
1671# for municipal offices and schools.... Igloolik [was similar but then]
1672# made the switch to central time on Saturday, Nov. 6.
1673
1674# From Paul Eggert (2000-10-02):
1675# Matthews and Vincent (1998) say the following, but we lack histories
1676# for these potential new Zones.
1677#
1678# The Canadian Forces station at Alert uses Eastern Time while the
1679# handful of residents at the Eureka weather station [in the Central
1680# zone] skip daylight savings. Baffin Island, which is crossed by the
1681# Central, Eastern and Atlantic Time zones only uses Eastern Time.
1682# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
1683# Central Time and Southampton Island [in the Central zone] is not
1684# required to use daylight savings.
1685
1686# From
1687# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">
1688# Nunavut now has two time zones
1689# </a> (2000-11-10):
1690# The Nunavut government would allow its employees in Kugluktuk and
1691# Cambridge Bay to operate on central time year-round, putting them
1692# one hour behind the rest of Nunavut for six months during the winter.
1693# At the end of October the two communities had rebelled against
1694# Nunavut's unified time zone, refusing to shift to eastern time with
1695# the rest of the territory for the winter. Cambridge Bay remained on
1696# central time, while Kugluktuk, even farther west, reverted to
1697# mountain time, which they had used before the advent of Nunavut's
1698# unified time zone in 1999.
1699#
1700# From Rives McDow (2001-01-20), quoting the Nunavut government:
1701# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
1702
1703# From Paul Eggert (2000-12-04):
1704# Let's just keep track of the official times for now.
1705
1706# From Rives McDow (2001-03-07):
1707# The premier of Nunavut has issued a ministerial statement advising
1708# that effective 2001-04-01, the territory of Nunavut will revert
1709# back to three time zones (mountain, central, and eastern). Of the
1710# cities in Nunavut, Coral Harbor is the only one that I know of that
1711# has said it will not observe dst, staying on EST year round. I'm
1712# checking for more info, and will get back to you if I come up with
1713# more.
1714# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
1715
9ffe4b14
SW
1716# From Gwillim Law (2005-05-21):
1717# According to maps at
1718# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg
1719# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg
1720# (both dated 2003), and
1721# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
1722# (from a 1998 Canadian Geographic article), the de facto and de jure time
1723# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
1724# round. Using Google, it's easy to find other websites that confirm this.
1725# I wasn't able to find how far back this time regimen goes, but since it
1726# predates the creation of Nunavut, it probably goes back many years....
1727# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
1728#
1729# From Paul Eggert (2005-07-26):
1730# For lack of better information, assume that Southampton Island observed
1731# daylight saving only during wartime.
1732
8393cd87
SW
1733# From Chris Walton (2007-03-01):
1734# ... the community of Resolute (located on Cornwallis Island in
1735# Nunavut) moved from Central Time to Eastern Time last November.
1736# Basically the community did not change its clocks at the end of
1737# daylight saving....
1738# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
1739
1740# From Chris Walton (2007-03-14):
1741# Today I phoned the "hamlet office" to find out what Resolute was doing with
1742# its clocks.
1743#
1744# The individual that answered the phone confirmed that the clocks did not
1745# move at the end of daylight saving on October 29/2006. He also told me that
1746# the clocks did not move this past weekend (March 11/2007)....
09695390
SW
1747
1748# From Chris Walton (2008-11-13):
1749# ...the residents of Resolute believe that they are changing "time zones"
1750# twice a year. In winter months, local time is qualified with "Eastern
1751# Time" which is really "Eastern Standard Time (UTC-5)". In summer
1752# months, local time is qualified with "Central Time" which is really
1753# "Central Daylight Time (UTC-5)"...
8393cd87 1754
984263bc
MD
1755# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1756Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
1757Rule NT_YK 1918 only - Oct 27 2:00 0 S
1758Rule NT_YK 1919 only - May 25 2:00 1:00 D
1759Rule NT_YK 1919 only - Nov 1 0:00 0 S
ba5ba9da
JR
1760Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
1761Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
984263bc
MD
1762Rule NT_YK 1945 only - Sep 30 2:00 0 S
1763Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
1764Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
1765Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
bd7414aa
SW
1766Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
1767Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
984263bc 1768# Zone NAME GMTOFF RULES FORMAT [UNTIL]
8393cd87
SW
1769# aka Panniqtuuq
1770Zone America/Pangnirtung 0 - zzz 1921 # trading post est.
984263bc
MD
1771 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
1772 -5:00 Canada E%sT 1999 Oct 31 2:00
1773 -6:00 Canada C%sT 2000 Oct 29 2:00
1774 -5:00 Canada E%sT
8393cd87
SW
1775# formerly Frobisher Bay
1776Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est.
984263bc
MD
1777 -5:00 NT_YK E%sT 1999 Oct 31 2:00
1778 -6:00 Canada C%sT 2000 Oct 29 2:00
1779 -5:00 Canada E%sT
8393cd87 1780# aka Qausuittuq
09695390
SW
1781# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1782Rule Resolute 2006 max - Nov Sun>=1 2:00 0 ES
1783Rule Resolute 2007 max - Mar Sun>=8 2:00 0 CD
8393cd87
SW
1784Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded
1785 -6:00 NT_YK C%sT 2000 Oct 29 2:00
1786 -5:00 - EST 2001 Apr 1 3:00
1787 -6:00 Canada C%sT 2006 Oct 29 2:00
09695390 1788 -5:00 Resolute %sT
8393cd87
SW
1789# aka Kangiqiniq
1790Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded
984263bc
MD
1791 -6:00 NT_YK C%sT 2000 Oct 29 2:00
1792 -5:00 - EST 2001 Apr 1 3:00
1793 -6:00 Canada C%sT
8393cd87
SW
1794# aka Iqaluktuuttiaq
1795Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.?
984263bc
MD
1796 -7:00 NT_YK M%sT 1999 Oct 31 2:00
1797 -6:00 Canada C%sT 2000 Oct 29 2:00
1798 -5:00 - EST 2000 Nov 5 0:00
1799 -6:00 - CST 2001 Apr 1 3:00
1800 -7:00 Canada M%sT
8393cd87 1801Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded?
bd7414aa
SW
1802 -7:00 NT_YK M%sT 1980
1803 -7:00 Canada M%sT
8393cd87 1804Zone America/Inuvik 0 - zzz 1953 # Inuvik founded
984263bc 1805 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
bd7414aa
SW
1806 -7:00 NT_YK M%sT 1980
1807 -7:00 Canada M%sT
984263bc
MD
1808Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
1809 -9:00 NT_YK Y%sT 1966 Jul 1 2:00
bd7414aa
SW
1810 -8:00 NT_YK P%sT 1980
1811 -8:00 Canada P%sT
984263bc
MD
1812Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
1813 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
bd7414aa
SW
1814 -8:00 NT_YK P%sT 1980
1815 -8:00 Canada P%sT
984263bc
MD
1816
1817
1818###############################################################################
1819
1820# Mexico
1821
1822# From Paul Eggert (2001-03-05):
1823# The Investigation and Analysis Service of the
1824# Mexican Library of Congress (MLoC) has published a
1825# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
1826# history of Mexican local time (in Spanish)
1827# </a>.
1828#
bd7414aa 1829# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
984263bc 1830# (In all cases we go with the MLoC.)
bd7414aa
SW
1831# S&P report that Baja was at -8:00 in 1922/1923.
1832# S&P say the 1930 transition in Baja was 1930-11-16.
1833# S&P report no DST during summer 1931.
1834# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
984263bc
MD
1835
1836# From Gwillim Law (2001-02-20):
1837# There are some other discrepancies between the Decrees page and the
1838# tz database. I think they can best be explained by supposing that
1839# the researchers who prepared the Decrees page failed to find some of
1840# the relevant documents.
1841
9ffe4b14 1842# From Alan Perry (1996-02-15):
984263bc
MD
1843# A guy from our Mexico subsidiary finally found the Presidential Decree
1844# outlining the timezone changes in Mexico.
1845#
1846# ------------- Begin Forwarded Message -------------
1847#
1848# I finally got my hands on the Official Presidential Decree that sets up the
1849# rules for the DST changes. The rules are:
1850#
1851# 1. The country is divided in 3 timezones:
1852# - Baja California Norte (the Mexico/BajaNorte TZ)
1853# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
1854# - The rest of the country (the Mexico/General TZ)
1855#
1856# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
1857# at 2:00 AM, the times in each zone are as follows:
1858# BajaNorte: GMT+7
1859# BajaSur: GMT+6
1860# General: GMT+5
1861#
1862# 3. The rest of the year, the times are as follows:
1863# BajaNorte: GMT+8
1864# BajaSur: GMT+7
1865# General: GMT+6
1866#
1867# The Decree was published in Mexico's Official Newspaper on January 4th.
1868#
1869# -------------- End Forwarded Message --------------
1870# From Paul Eggert (1996-06-12):
1871# For an English translation of the decree, see
1872# <a href="http://mexico-travel.com/extra/timezone_eng.html">
1873# ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
1874# </a>
1875
1876# From Rives McDow (1998-10-08):
1877# The State of Quintana Roo has reverted back to central STD and DST times
1878# (i.e. UTC -0600 and -0500 as of 1998-08-02).
1879
1880# From Rives McDow (2000-01-10):
1881# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
1882# zone 5 hours from the International Date Line, and will not observe daylight
1883# savings time so as to stay on the same time zone as the southern part of
1884# Arizona year round.
1885
1886# From Jesper Norgaard, translating
1887# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
1888# In Oaxaca, the 55.000 teachers from the Section 22 of the National
1889# Syndicate of Education Workers, refuse to apply daylight saving each
1890# year, so that the more than 10,000 schools work at normal hour the
1891# whole year.
1892
1893# From Gwillim Law (2001-01-19):
1894# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
1895# (translated):...
1896# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
1897# that Summer Time will be reduced from seven to five months, starting
1898# this year....
1899# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
1900# [translated], says "summer time will ... take effect on the first Sunday
1901# in May, and end on the last Sunday of September.
1902
1903# From Arthur David Olson (2001-01-25):
1904# The 2001-01-24 traditional Washington Post contained the page one
1905# story "Timely Issue Divides Mexicans."...
1906# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
1907# ... Mexico City Mayor Lopez Obrador "...is threatening to keep
1908# Mexico City and its 20 million residents on a different time than
1909# the rest of the country..." In particular, Lopez Obrador would abolish
1910# observation of Daylight Saving Time.
1911
1912# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
1913# Official statute published by the Energy Department
1914# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
1915# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03).
1916
1917# From Paul Eggert (2001-03-03):
1918#
1919# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
1920# James F. Smith writes in today's LA Times
1921# </a>
1922# * Sonora will continue to observe standard time.
1923# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
1924# the Federal District will not adopt DST.
1925# * 4 of 16 district leaders announced they'll ignore the decree.
1926# * The decree does not affect federal-controlled facilities including
1927# the airport, banks, hospitals, and schools.
1928#
1929# For now we'll assume that the Federal District will bow to federal rules.
1930
1931# From Jesper Norgaard (2001-04-01):
1932# I found some references to the Mexican application of daylight
1933# saving, which modifies what I had already sent you, stating earlier
1934# that a number of northern Mexican states would go on daylight
1935# saving. The modification reverts this to only cover Baja California
1936# (Norte), while all other states (except Sonora, who has no daylight
1937# saving all year) will follow the original decree of president
1938# Vicente Fox, starting daylight saving May 6, 2001 and ending
1939# September 30, 2001.
1940# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
1941# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
1942
1943# From Reuters (2001-09-04):
1944# Mexico's Supreme Court on Tuesday declared that daylight savings was
1945# unconstitutional in Mexico City, creating the possibility the
1946# capital will be in a different time zone from the rest of the nation
1947# next year.... The Supreme Court's ruling takes effect at 2:00
1948# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
1949# standard time. "This is so residents of the Federal District are not
1950# subject to unexpected time changes," a statement from the court said.
1951
1952# From Jesper Norgaard Welen (2002-03-12):
1953# ... consulting my local grocery store(!) and my coworkers, they all insisted
1954# that a new decision had been made to reinstate US style DST in Mexico....
1955# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
1956# confirms this. Sonora as usual is the only state where DST is not applied.
1957
1958# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1959Rule Mexico 1939 only - Feb 5 0:00 1:00 D
1960Rule Mexico 1939 only - Jun 25 0:00 0 S
1961Rule Mexico 1940 only - Dec 9 0:00 1:00 D
1962Rule Mexico 1941 only - Apr 1 0:00 0 S
ba5ba9da 1963Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
984263bc
MD
1964Rule Mexico 1944 only - May 1 0:00 0 S
1965Rule Mexico 1950 only - Feb 12 0:00 1:00 D
1966Rule Mexico 1950 only - Jul 30 0:00 0 S
1967Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
1968Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
1969Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
1970Rule Mexico 2001 only - Sep lastSun 2:00 0 S
1971Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
1972Rule Mexico 2002 max - Oct lastSun 2:00 0 S
1973# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1974# Quintana Roo
1975Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
1976 -6:00 - CST 1981 Dec 23
1977 -5:00 Mexico E%sT 1998 Aug 2 2:00
1978 -6:00 Mexico C%sT
1979# Campeche, Yucatan
1980Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
1981 -6:00 - CST 1981 Dec 23
1982 -5:00 - EST 1982 Dec 2
1983 -6:00 Mexico C%sT
1984# Coahuila, Durango, Nuevo Leon, Tamaulipas
1985Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
1986 -6:00 - CST 1988
1987 -6:00 US C%sT 1989
1988 -6:00 Mexico C%sT
1989# Central Mexico
1990Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
1991 -7:00 - MST 1927 Jun 10 23:00
1992 -6:00 - CST 1930 Nov 15
1993 -7:00 - MST 1931 May 1 23:00
1994 -6:00 - CST 1931 Oct
1995 -7:00 - MST 1932 Apr 1
1996 -6:00 Mexico C%sT 2001 Sep 30 02:00
1997 -6:00 - CST 2002 Feb 20
1998 -6:00 Mexico C%sT
1999# Chihuahua
2000Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
2001 -7:00 - MST 1927 Jun 10 23:00
2002 -6:00 - CST 1930 Nov 15
2003 -7:00 - MST 1931 May 1 23:00
2004 -6:00 - CST 1931 Oct
2005 -7:00 - MST 1932 Apr 1
2006 -6:00 - CST 1996
2007 -6:00 Mexico C%sT 1998
2008 -6:00 - CST 1998 Apr Sun>=1 3:00
2009 -7:00 Mexico M%sT
2010# Sonora
2011Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
2012 -7:00 - MST 1927 Jun 10 23:00
2013 -6:00 - CST 1930 Nov 15
2014 -7:00 - MST 1931 May 1 23:00
2015 -6:00 - CST 1931 Oct
2016 -7:00 - MST 1932 Apr 1
2017 -6:00 - CST 1942 Apr 24
2018 -7:00 - MST 1949 Jan 14
2019 -8:00 - PST 1970
2020 -7:00 Mexico M%sT 1999
2021 -7:00 - MST
2022# Baja California Sur, Nayarit, Sinaloa
2023Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
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 1942 Apr 24
2030 -7:00 - MST 1949 Jan 14
2031 -8:00 - PST 1970
2032 -7:00 Mexico M%sT
2033# Baja California
2034Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
2035 -7:00 - MST 1924
2036 -8:00 - PST 1927 Jun 10 23:00
2037 -7:00 - MST 1930 Nov 15
2038 -8:00 - PST 1931 Apr 1
2039 -8:00 1:00 PDT 1931 Sep 30
2040 -8:00 - PST 1942 Apr 24
bd7414aa
SW
2041 -8:00 1:00 PWT 1945 Aug 14 23:00u
2042 -8:00 1:00 PPT 1945 Nov 12 # Peace
984263bc
MD
2043 -8:00 - PST 1948 Apr 5
2044 -8:00 1:00 PDT 1949 Jan 14
2045 -8:00 - PST 1954
2046 -8:00 CA P%sT 1961
2047 -8:00 - PST 1976
2048 -8:00 US P%sT 1996
2049 -8:00 Mexico P%sT 2001
2050 -8:00 US P%sT 2002 Feb 20
2051 -8:00 Mexico P%sT
bd7414aa 2052# From Paul Eggert (2006-03-22):
984263bc
MD
2053# Formerly there was an America/Ensenada zone, which differed from
2054# America/Tijuana only in that it did not observe DST from 1976
bd7414aa
SW
2055# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
2056# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
984263bc 2057# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
bd7414aa 2058# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
984263bc
MD
2059# DST-observance was a town-by-town matter back then. This concerns
2060# data after 1970 so most likely there should be at least one Zone
2061# other than America/Tijuana for Baja, but it's not clear yet what its
2062# name or contents should be.
2063#
2064# Revillagigedo Is
2065# no information
2066
2067###############################################################################
2068
2069# Anguilla
2070# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2071Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
2072 -4:00 - AST
2073
2074# Antigua and Barbuda
2075# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2076Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
2077 -5:00 - EST 1951
2078 -4:00 - AST
2079
2080# Bahamas
880368e2
SW
2081#
2082# From Sue Williams (2006-12-07):
8393cd87 2083# The Bahamas announced about a month ago that they plan to change their DST
880368e2
SW
2084# rules to sync with the U.S. starting in 2007....
2085# http://www.jonesbahamas.com/?c=45&a=10412
2086
984263bc 2087# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
a36b983e
SW
2088Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2089Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
984263bc
MD
2090# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2091Zone America/Nassau -5:09:24 - LMT 1912 Mar 2
880368e2
SW
2092 -5:00 Bahamas E%sT 1976
2093 -5:00 US E%sT
984263bc
MD
2094
2095# Barbados
2096# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2097Rule Barb 1977 only - Jun 12 2:00 1:00 D
2098Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2099Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2100Rule Barb 1979 only - Sep 30 2:00 0 S
2101Rule Barb 1980 only - Sep 25 2:00 0 S
2102# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2103Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown
2104 -3:58:28 - BMT 1932 # Bridgetown Mean Time
2105 -4:00 Barb A%sT
2106
2107# Belize
bd7414aa 2108# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
984263bc
MD
2109# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2110Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
2111Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
2112Rule Belize 1973 only - Dec 5 0:00 1:00 D
2113Rule Belize 1974 only - Feb 9 0:00 0 S
2114Rule Belize 1982 only - Dec 18 0:00 1:00 D
2115Rule Belize 1983 only - Feb 12 0:00 0 S
2116# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2117Zone America/Belize -5:52:48 - LMT 1912 Apr
2118 -6:00 Belize C%sT
2119
2120# Bermuda
bd7414aa
SW
2121
2122# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2123
2124# Next year, however, clocks in the US will go forward on the second Sunday
2125# in March, until the first Sunday in November. And, after the Time Zone
2126# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2127# Friday, the same thing will happen in Bermuda.
2128# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2129
984263bc
MD
2130# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2131Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton
2132 -4:00 - AST 1974 Apr 28 2:00
bd7414aa
SW
2133 -4:00 Bahamas A%sT 1976
2134 -4:00 US A%sT
984263bc
MD
2135
2136# Cayman Is
2137# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2138Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
2139 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2140 -5:00 - EST
2141
2142# Costa Rica
2143# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2144Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2145Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2146Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
bd7414aa
SW
2147# IATA SSIM (1991-09) says the following was at 1:00;
2148# go with Shanks & Pottenger.
984263bc
MD
2149Rule CR 1991 only - Jul 1 0:00 0 S
2150Rule CR 1992 only - Mar 15 0:00 0 S
2151# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
2152# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2153Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
2154 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time
2155 -6:00 CR C%sT
2156# Coco
2157# no information; probably like America/Costa_Rica
2158
2159# Cuba
2160
2161# From Arthur David Olson (1999-03-29):
2162# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2163# the Cuban National Team and the Baltimore Orioles was carried live on
2164# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2165# During the game, play-by-play announcer Jim Hunter noted that
2166# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2167# Time today." (The "two hour" remark referred to losing one hour of
2168# sleep on 1999-03-28--when the announcers were in Cuba as it switched
2169# to DST--and one more hour on 1999-04-04--when the announcers will have
2170# returned to Baltimore, which switches on that date.)
2171
bc95ec93
SW
2172# From Evert van der Veer via Steffen Thorsen (2004-10-28):
2173# Cuba is not going back to standard time this year.
bd7414aa 2174# From Paul Eggert (2006-03-22):
bc95ec93
SW
2175# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2176# says that it's due to a problem at the Antonio Guiteras
2177# thermoelectric plant, and says "This October there will be no return
2178# to normal hours (after daylight saving time)".
bd7414aa 2179# For now, let's assume that it's a temporary measure.
bc95ec93 2180
aa65d21a
SW
2181# From Carlos A. Carnero Delgado (2005-11-12):
2182# This year (just like in 2004-2005) there's no change in time zone
2183# adjustment in Cuba. We will stay in daylight saving time:
2184# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2185
ff8424c5
SW
2186# From Jesper Norgaard Welen (2006-10-21):
2187# An article in GRANMA INTERNACIONAL claims that Cuba will end
2188# the 3 years of permanent DST next weekend, see
2189# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2190# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2191# watches should be set back one hour -- going back to 00:00 hours -- returning
2192# to the normal schedule....
bd7414aa 2193
8393cd87
SW
2194# From Paul Eggert (2007-03-02):
2195# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday,
2196# says Cuban clocks will advance at midnight on March 10.
2197# For lack of better information, assume Cuba will use US rules,
2198# except that it switches at midnight standard time as usual.
1aec505f
SW
2199#
2200# From Steffen Thorsen (2007-10-25):
2201# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2202# earlier - on the last Sunday of October, just like in 2006.
2203#
2204# He supplied these references:
2205#
2206# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2207# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2208#
2209# From Alex Kryvenishev (2007-10-25):
2210# Here is also article from Granma (Cuba):
2211#
2212# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre
2213# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2214#
2215# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
8393cd87 2216
e4a74243
SW
2217# From Arthur David Olson (2008-03-09):
2218# I'm in Maryland which is now observing United States Eastern Daylight
2219# Time. At 9:44 local time I used RealPlayer to listen to
2220# <a href="http://media.enet.cu/radioreloj">
2221# http://media.enet.cu/radioreloj
2222# </a>, a Cuban information station, and heard
2223# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2224# indicating that Cuba is still on standard time.
2225
2226# From Steffen Thorsen (2008-03-12):
2227# It seems that Cuba will start DST on Sunday, 2007-03-16...
2228# It was announced yesterday, according to this source (in Spanish):
2229# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm">
2230# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2231# </a>
2232#
2233# Some more background information is posted here:
2234# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html">
2235# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2236# </a>
2237#
2238# The article also says that Cuba has been observing DST since 1963,
2239# while Shanks (and tzdata) has 1965 as the first date (except in the
2240# 1940's). Many other web pages in Cuba also claim that it has been
2241# observed since 1963, but with the exception of 1970 - an exception
2242# which is not present in tzdata/Shanks. So there is a chance we need to
2243# change some historic records as well.
2244#
2245# One example:
2246# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm">
2247# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2248# </a>
2249
2250# From Jesper Norgaard Welen (2008-03-13):
2251# The Cuban time change has just been confirmed on the most authoritative
2252# web site, the Granma. Please check out
2253# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html">
2254# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2255# </a>
2256#
2257# Basically as expected after Steffen Thorsens information, the change
2258# will take place midnight between Saturday and Sunday.
2259
2260# From Arthur David Olson (2008-03-12):
2261# Assume Sun>=15 (third Sunday) going forward.
2262
8c0e8847
SW
2263# From Alexander Krivenyshev (2009-03-04)
2264# According to the Radio Reloj - Cuba will start Daylight Saving Time on
2265# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2266# not on midnight March 14 / March 15 as previously thought.
2267#
2268# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html">
2269# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2270# (in Spanish)
2271# </a>
2272
2273# From Arthur David Olson (2009-03-09)
2274# I listened over the Internet to
2275# <a href="http://media.enet.cu/readioreloj">
2276# http://media.enet.cu/readioreloj
2277# </a>
2278# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2279# the time was announced as "diez cinco"--the same time as here, indicating
2280# that has indeed switched to DST. Assume second Sunday from 2009 forward.
2281
984263bc
MD
2282# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2283Rule Cuba 1928 only - Jun 10 0:00 1:00 D
2284Rule Cuba 1928 only - Oct 10 0:00 0 S
2285Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
2286Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
2287Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
2288Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
2289Rule Cuba 1965 only - Jun 1 0:00 1:00 D
2290Rule Cuba 1965 only - Sep 30 0:00 0 S
2291Rule Cuba 1966 only - May 29 0:00 1:00 D
2292Rule Cuba 1966 only - Oct 2 0:00 0 S
2293Rule Cuba 1967 only - Apr 8 0:00 1:00 D
2294Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
2295Rule Cuba 1968 only - Apr 14 0:00 1:00 D
2296Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
2297Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
2298Rule Cuba 1972 1974 - Oct 8 0:00 0 S
2299Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
2300Rule Cuba 1978 only - May 7 0:00 1:00 D
2301Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
2302Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
2303Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
2304Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
2305Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
2306Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
2307Rule Cuba 1996 only - Oct 6 0:00s 0 S
2308Rule Cuba 1997 only - Oct 12 0:00s 0 S
2309Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
bc95ec93 2310Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
09695390 2311Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D
1aec505f 2312Rule Cuba 2006 max - Oct lastSun 0:00s 0 S
e4a74243 2313Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
8c0e8847
SW
2314Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
2315Rule Cuba 2009 max - Mar Sun>=8 0:00s 1:00 D
984263bc
MD
2316
2317# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2318Zone America/Havana -5:29:28 - LMT 1890
2319 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
2320 -5:00 Cuba C%sT
2321
2322# Dominica
2323# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2324Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
2325 -4:00 - AST
2326
2327# Dominican Republic
2328
2329# From Steffen Thorsen (2000-10-30):
2330# Enrique Morales reported to me that the Dominican Republic has changed the
2331# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2332# http://www.listin.com.do/antes/261000/republica/princi.html
2333
2334# From Paul Eggert (2000-12-04):
2335# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
2336
2337# From Rives McDow (2000-12-01):
2338# Dominican Republic changed its mind and presidential decree on Tuesday,
2339# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
2340# Dominican Republic will be reverting to 8 hours from the International Date
2341# Line, and will not be using DST in the foreseeable future. The reason they
2342# decided to use DST was to be in synch with Puerto Rico, who was also going
2343# to implement DST. When Puerto Rico didn't implement DST, the president
2344# decided to revert.
2345
2346
2347# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2348Rule DR 1966 only - Oct 30 0:00 1:00 D
2349Rule DR 1967 only - Feb 28 0:00 0 S
2350Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
2351Rule DR 1970 only - Feb 21 0:00 0 S
2352Rule DR 1971 only - Jan 20 0:00 0 S
2353Rule DR 1972 1974 - Jan 21 0:00 0 S
2354# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2355Zone America/Santo_Domingo -4:39:36 - LMT 1890
2356 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
2357 -5:00 DR E%sT 1974 Oct 27
2358 -4:00 - AST 2000 Oct 29 02:00
2359 -5:00 US E%sT 2000 Dec 3 01:00
2360 -4:00 - AST
2361
2362# El Salvador
bd7414aa 2363
984263bc
MD
2364# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2365Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
2366Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
ba5ba9da
JR
2367# There are too many San Salvadors elsewhere, so use America/El_Salvador
2368# instead of America/San_Salvador.
984263bc
MD
2369# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2370Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
2371 -6:00 Salv C%sT
2372
2373# Grenada
2374# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2375Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's
2376 -4:00 - AST
2377
2378# Guadeloupe
2379# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2380Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
2381 -4:00 - AST
9d5f55b0
SW
2382# St Barthelemy
2383Link America/Guadeloupe America/St_Barthelemy
2384# St Martin (French part)
2385Link America/Guadeloupe America/Marigot
984263bc
MD
2386
2387# Guatemala
bd7414aa
SW
2388#
2389# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
2390# Diario Co Latino, at
2391# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,
2392# says in an article dated 2006-04-19 that the Guatemalan government had
2393# decided on that date to advance official time by 60 minutes, to lessen the
2394# impact of the elevated cost of oil.... Daylight saving time will last from
2395# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
2396# From Paul Eggert (2006-06-22):
2397# The Ministry of Energy and Mines, press release CP-15/2006
2398# (2006-04-19), says DST ends at 24:00. See
2399# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>.
2400
984263bc
MD
2401# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2402Rule Guat 1973 only - Nov 25 0:00 1:00 D
2403Rule Guat 1974 only - Feb 24 0:00 0 S
2404Rule Guat 1983 only - May 21 0:00 1:00 D
2405Rule Guat 1983 only - Sep 22 0:00 0 S
2406Rule Guat 1991 only - Mar 23 0:00 1:00 D
2407Rule Guat 1991 only - Sep 7 0:00 0 S
bd7414aa
SW
2408Rule Guat 2006 only - Apr 30 0:00 1:00 D
2409Rule Guat 2006 only - Oct 1 0:00 0 S
984263bc
MD
2410# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2411Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
2412 -6:00 Guat C%sT
2413
2414# Haiti
bc95ec93
SW
2415# From Gwillim Law (2005-04-15):
2416# Risto O. Nykanen wrote me that Haiti is now on DST.
2417# I searched for confirmation, and I found a
2418# <a href="http://www.haitianconsulate.org/time.doc"> press release
2419# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
2420# </a>. Translated from French, it says:
2421#
2422# "The Prime Minister's Communication Office notifies the public in general
2423# and the press in particular that, following a decision of the Interior
2424# Ministry and the Territorial Collectivities [I suppose that means the
2425# provinces], Haiti will move to Eastern Daylight Time in the night from next
2426# Saturday the 2nd to Sunday the 3rd.
2427#
2428# "Consequently, the Prime Minister's Communication Office wishes to inform
2429# the population that the country's clocks will be set forward one hour
2430# starting at midnight. This provision will hold until the last Saturday in
2431# October 2005.
2432#
2433# "Port-au-Prince, March 31, 2005"
bd7414aa
SW
2434#
2435# From Steffen Thorsen (2006-04-04):
2436# I have been informed by users that Haiti observes DST this year like
2437# last year, so the current "only" rule for 2005 might be changed to a
2438# "max" rule or to last until 2006. (Who knows if they will observe DST
2439# next year or if they will extend their DST like US/Canada next year).
2440#
2441# I have found this article about it (in French):
2442# http://www.haitipressnetwork.com/news.cfm?articleID=7612
2443#
2444# The reason seems to be an energy crisis.
2445
e1a4f1e4
SW
2446# From Stephen Colebourne (2007-02-22):
2447# Some IATA info: Haiti won't be having DST in 2007.
2448
bc95ec93 2449
984263bc
MD
2450# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2451Rule Haiti 1983 only - May 8 0:00 1:00 D
2452Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
2453Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
bd7414aa
SW
2454# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
2455# Go with IATA.
984263bc
MD
2456Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
2457Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
e1a4f1e4
SW
2458Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
2459Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
984263bc
MD
2460# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2461Zone America/Port-au-Prince -4:49:20 - LMT 1890
2462 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
2463 -5:00 Haiti E%sT
2464
2465# Honduras
bd7414aa
SW
2466# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
2467
2468# From Paul Eggert (2006-05-05):
2469# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
2470# saying Honduras will start using DST midnight Saturday, effective 4
2471# months until September. La Tribuna reported today
2472# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
2473# of Honduras, refused to back down on this.
2474
2475# From Jesper Norgaard Welen (2006-08-08):
2476# It seems that Honduras has returned from DST to standard time this Monday at
2477# 00:00 hours (prolonging Sunday to 25 hours duration).
2478# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
2479
2480# From Paul Eggert (2006-08-08):
2481# Also see Diario El Heraldo, The country returns to standard time (2006-08-08)
2482# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>.
2483# It mentions executive decree 18-2006.
2484
2485# From Steffen Thorsen (2006-08-17):
2486# Honduras will observe DST from 2007 to 2009, exact dates are not
2487# published, I have located this authoritative source:
2488# http://www.presidencia.gob.hn/noticia.aspx?nId=47
2489
f2892a6d
SW
2490# From Steffen Thorsen (2007-03-30):
2491# http://www.laprensahn.com/pais_nota.php?id04962=7386
2492# So it seems that Honduras will not enter DST this year....
2493
bd7414aa
SW
2494# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2495Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
2496Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
f2892a6d
SW
2497Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
2498Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
984263bc
MD
2499# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2500Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
bd7414aa 2501 -6:00 Hond C%sT
984263bc
MD
2502#
2503# Great Swan I ceded by US to Honduras in 1972
2504
2505# Jamaica
2506
2507# From Bob Devine (1988-01-28):
2508# Follows US rules.
2509
2510# From U. S. Naval Observatory (1989-01-19):
2511# JAMAICA 5 H BEHIND UTC
2512
bd7414aa 2513# From Shanks & Pottenger:
984263bc
MD
2514# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2515Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
2516 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2517 -5:00 - EST 1974 Apr 28 2:00
2518 -5:00 US E%sT 1984
2519 -5:00 - EST
2520
2521# Martinique
2522# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2523Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
2524 -4:04:20 - FFMT 1911 May # Fort-de-France MT
2525 -4:00 - AST 1980 Apr 6
2526 -4:00 1:00 ADT 1980 Sep 28
2527 -4:00 - AST
2528
2529# Montserrat
bd7414aa
SW
2530# From Paul Eggert (2006-03-22):
2531# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.
2532# world.gazetteer.com says Cork Hill is the most populous location now.
984263bc 2533# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bd7414aa 2534Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill
984263bc
MD
2535 -4:00 - AST
2536
2537# Nicaragua
2538#
bd7414aa 2539# This uses Shanks & Pottenger for times before 2005.
984263bc 2540#
bc95ec93
SW
2541# From Steffen Thorsen (2005-04-12):
2542# I've got reports from 8 different people that Nicaragua just started
2543# DST on Sunday 2005-04-10, in order to save energy because of
2544# expensive petroleum. The exact end date for DST is not yet
2545# announced, only "September" but some sites also say "mid-September".
2546# Some background information is available on the President's official site:
2547# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
2548# The Decree, no 23-2005 is available here:
2549# 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
2550#
9ffe4b14 2551# From Paul Eggert (2005-05-01):
bc95ec93 2552# The decree doesn't say anything about daylight saving, but for now let's
bd7414aa 2553# assume that it is daylight saving....
9ffe4b14
SW
2554#
2555# From Gwillim Law (2005-04-21):
2556# The Associated Press story on the time change, which can be found at
2557# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
2558# and elsewhere, says (fifth paragraph, translated from Spanish): "The last
2559# time that a change of clocks was applied to save energy was in the year 2000
2560# during the Arnoldo Aleman administration."...
2561# The northamerica file says that Nicaragua has been on UTC-6 continuously
2562# since December 1998. I wasn't able to find any details of Nicaraguan time
2563# changes in 2000. Perhaps a note could be added to the northamerica file, to
2564# the effect that we have indirect evidence that DST was observed in 2000.
bc95ec93 2565#
aa65d21a
SW
2566# From Jesper Norgaard Welen (2005-11-02):
2567# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
2568# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
2569# (2005-09-26)
2570#
bd7414aa
SW
2571# From Jesper Norgaard Welen (2006-05-05):
2572# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
2573# (my informal translation)
2574# By order of the president of the republic, Enrique Bolanos, Nicaragua
2575# advanced by sixty minutes their official time, yesterday at 2 in the
2576# morning, and will stay that way until 30.th. of september.
2577#
17f48456
SW
2578# From Jesper Norgaard Welen (2006-09-30):
2579# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
2580# My informal translation runs:
2581# The natural sun time is restored in all the national territory, in that the
2582# time is returned one hour at 01:00 am of October 1 of 2006.
2583#
984263bc
MD
2584# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2585Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
2586Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
bc95ec93 2587Rule Nic 2005 only - Apr 10 0:00 1:00 D
17f48456 2588Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
bd7414aa 2589Rule Nic 2006 only - Apr 30 2:00 1:00 D
17f48456 2590Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
984263bc
MD
2591# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2592Zone America/Managua -5:45:08 - LMT 1890
2593 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
2594 -6:00 - CST 1973 May
2595 -5:00 - EST 1975 Feb 16
bd7414aa
SW
2596 -6:00 Nic C%sT 1992 Jan 1 4:00
2597 -5:00 - EST 1992 Sep 24
2598 -6:00 - CST 1993
2599 -5:00 - EST 1997
bc95ec93 2600 -6:00 Nic C%sT
984263bc
MD
2601
2602# Panama
2603# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2604Zone America/Panama -5:18:08 - LMT 1890
2605 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time
2606 -5:00 - EST
2607
2608# Puerto Rico
2609# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
2610# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2611Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
2612 -4:00 - AST 1942 May 3
bd7414aa 2613 -4:00 US A%sT 1946
984263bc
MD
2614 -4:00 - AST
2615
2616# St Kitts-Nevis
2617# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2618Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
2619 -4:00 - AST
2620
2621# St Lucia
2622# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2623Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
2624 -4:04:00 - CMT 1912 # Castries Mean Time
2625 -4:00 - AST
2626
2627# St Pierre and Miquelon
2628# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
2629# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2630Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
2631 -4:00 - AST 1980 May
ba5ba9da
JR
2632 -3:00 - PMST 1987 # Pierre & Miquelon Time
2633 -3:00 Canada PM%sT
984263bc
MD
2634
2635# St Vincent and the Grenadines
2636# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2637Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
2638 -4:04:56 - KMT 1912 # Kingstown Mean Time
2639 -4:00 - AST
2640
2641# Turks and Caicos
e1a4f1e4
SW
2642#
2643# From Chris Dunn in
2644# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007>
2645# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
2646# daylight saving dates for time changes have been adjusted to match
2647# the recent U.S. change of dates.
2648#
2649# From Brian Inglis (2007-04-28):
2650# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
2651# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
2652# rows before that there is an out of date entry for Oct:
2653# "Eastern Standard Times Begins 2007
2654# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
2655# indicating that the normal ET rules are followed.
2656#
2657# From Paul Eggert (2006-05-01):
bd7414aa 2658# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998)
e1a4f1e4
SW
2659# says they switch at midnight. Go with Shanks & Pottenger.
2660#
984263bc 2661# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
e1a4f1e4
SW
2662Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D
2663Rule TC 1979 2006 - Oct lastSun 2:00 0 S
2664Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D
2665Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D
2666Rule TC 2007 max - Nov Sun>=1 2:00 0 S
984263bc
MD
2667# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2668Zone America/Grand_Turk -4:44:32 - LMT 1890
2669 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2670 -5:00 TC E%sT
2671
2672# British Virgin Is
2673# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2674Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
2675 -4:00 - AST
2676
2677# Virgin Is
2678# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2679Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
2680 -4:00 - AST