northamerica revision 15966:3192d7aa428d
1# 2# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3# 4# This code is free software; you can redistribute it and/or modify it 5# under the terms of the GNU General Public License version 2 only, as 6# published by the Free Software Foundation. Oracle designates this 7# particular file as subject to the "Classpath" exception as provided 8# by Oracle in the LICENSE file that accompanied this code. 9# 10# This code is distributed in the hope that it will be useful, but WITHOUT 11# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13# version 2 for more details (a copy is included in the LICENSE file that 14# accompanied this code). 15# 16# You should have received a copy of the GNU General Public License version 17# 2 along with this work; if not, write to the Free Software Foundation, 18# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19# 20# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21# or visit www.oracle.com if you need additional information or have any 22# questions. 23# 24# This file is in the public domain, so clarified as of 25# 2009-05-17 by Arthur David Olson. 26 27# also includes Central America and the Caribbean 28 29# This file is by no means authoritative; if you think you know better, 30# go ahead and edit the file (and please send any changes to 31# tz@iana.org for general use in the future). For more, please see 32# the file CONTRIBUTING in the tz distribution. 33 34# From Paul Eggert (1999-03-22): 35# A reliable and entertaining source about time zones is 36# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 37 38############################################################################### 39 40# United States 41 42# From Paul Eggert (1999-03-31): 43# Howse writes (pp 121-125) that time zones were invented by 44# Professor Charles Ferdinand Dowd (1825-1904), 45# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 46# His pamphlet "A System of National Time for Railroads" (1870) 47# was the result of his proposals at the Convention of Railroad Trunk Lines 48# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 49# but in 1872-05 he moved the proposed origin to Greenwich. 50 51# From Paul Eggert (2016-09-21): 52# Dowd's proposal left many details unresolved, such as where to draw 53# lines between time zones. The key individual who made time zones 54# work in the US was William Frederick Allen - railway engineer, 55# managing editor of the Travelers' Guide, and secretary of the 56# General Time Convention, a railway standardization group. Allen 57# spent months in dialogs with scientific and railway leaders, 58# developed a workable plan to institute time zones, and presented it 59# to the General Time Convention on 1883-04-11, saying that his plan 60# meant "local time would be practically abolished" - a plus for 61# railway scheduling. By the next convention on 1883-10-11 nearly all 62# railroads had agreed and it took effect on 1883-11-18 at 12:00. 63# That Sunday was called the "day of two noons", as the eastern parts 64# of the new zones observed noon twice. Allen witnessed the 65# transition in New York City, writing: 66# 67# I heard the bells of St. Paul's strike on the old time. Four 68# minutes later, obedient to the electrical signal from the Naval 69# Observatory ... the time-ball made its rapid descent, the chimes 70# of old Trinity rang twelve measured strokes, and local time was 71# abandoned, probably forever. 72# 73# Most of the US soon followed suit. See: 74# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. 75# http://dx.doi.org/10.2307/3105430 76 77# From Paul Eggert (2005-04-16): 78# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 79# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 80 81# From Paul Eggert (2006-03-22): 82# A good source for time zone historical data in the US is 83# Thomas G. Shanks, The American Atlas (5th edition), 84# San Diego: ACS Publications, Inc. (1991). 85# Make sure you have the errata sheet; the book is somewhat useless without it. 86# It is the source for most of the pre-1991 US entries below. 87 88# From Paul Eggert (2001-03-06): 89# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 90# in his whimsical essay "An Economical Project for Diminishing the Cost 91# of Light" published in the Journal de Paris (1784-04-26). 92# Not everyone is happy with the results: 93# 94# I don't really care how time is reckoned so long as there is some 95# agreement about it, but I object to being told that I am saving 96# daylight when my reason tells me that I am doing nothing of the kind. 97# I even object to the implication that I am wasting something 98# valuable if I stay in bed after the sun has risen. As an admirer 99# of moonlight I resent the bossy insistence of those who want to 100# reduce my time for enjoying it. At the back of the Daylight Saving 101# scheme I detect the bony, blue-fingered hand of Puritanism, eager 102# to push people into bed earlier, and get them up earlier, to make 103# them healthy, wealthy and wise in spite of themselves. 104# 105# -- Robertson Davies, The diary of Samuel Marchbanks, 106# Clarke, Irwin (1947), XIX, Sunday 107# 108# For more about the first ten years of DST in the United States, see 109# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 110# (Carnegie Library of Pittsburgh, 1927). 111# http://www.clpgh.org/exhibit/dst.html 112# 113# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 114# However, DST was imposed by the Standard Time Act of 1918, which 115# was the first nationwide legal time standard, and apparently 116# time was just called "Standard Time" or "Daylight Saving Time". 117 118# From Arthur David Olson: 119# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 120# See, for example, the front page of the Saturday, 1974-10-26 121# and Sunday, 1974-10-27 editions of the Washington Post. 122 123# From Arthur David Olson: 124# Before the Uniform Time Act of 1966 took effect in 1967, observance of 125# Daylight Saving Time in the US was by local option, except during wartime. 126 127# From Arthur David Olson (2000-09-25): 128# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 129# In the introduction, Oboler spoke of "Eastern Peace Time." 130# An AltaVista search turned up: 131# http://rowayton.org/rhs/hstaug45.html 132# "When the time is announced over the radio now, it is 'Eastern Peace 133# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 134# (August 1945) by way of confirmation. 135 136# From Joseph Gallant citing 137# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 138# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 139# to switch to London for Attlee's address, but the American people 140# never got to hear his speech live. According to one press account, 141# CBS' Bob Trout was first to announce the word of Japan's surrender, 142# but a few seconds later, NBC, ABC and Mutual also flashed the word 143# of surrender, all of whom interrupting the bells of Big Ben in 144# London which were to precede Mr. Attlee's speech. 145 146# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 147# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 148# 149# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 150# Any announcement from Asia would reach St. John's New York newsroom on a 151# wire service teletype machine, which had prescribed signals for major news. 152# Associated Press, for example, would ring five bells before spewing out 153# typed copy of an important story, and 10 bells for news "of transcendental 154# importance." 155# 156# On Aug. 14, stalling while talking steadily into the NBC networks' open 157# microphone, St. John heard five bells and waited only to hear a sixth bell, 158# before announcing confidently: "Ladies and gentlemen, World War II is over. 159# The Japanese have agreed to our surrender terms." 160# 161# He had scored a 20-second scoop on other broadcasters. 162 163# From Arthur David Olson (2005-08-22): 164# Paul has been careful to use the "US" rules only in those locations 165# that are part of the United States; this reflects the real scope of 166# U.S. government action. So even though the "US" rules have changed 167# in the latest release, other countries won't be affected. 168 169# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 170Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 171Rule US 1918 1919 - Oct lastSun 2:00 0 S 172Rule US 1942 only - Feb 9 2:00 1:00 W # War 173Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 174Rule US 1945 only - Sep lastSun 2:00 0 S 175Rule US 1967 2006 - Oct lastSun 2:00 0 S 176Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 177Rule US 1974 only - Jan 6 2:00 1:00 D 178Rule US 1975 only - Feb 23 2:00 1:00 D 179Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 180Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 181Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 182Rule US 2007 max - Nov Sun>=1 2:00 0 S 183 184# From Arthur David Olson, 2005-12-19 185# We generate the files specified below to guard against old files with 186# obsolete information being left in the time zone binary directory. 187# We limit the list to names that have appeared in previous versions of 188# this time zone package. 189# We do these as separate Zones rather than as Links to avoid problems if 190# a particular place changes whether it observes DST. 191# We put these specifications here in the northamerica file both to 192# increase the chances that they'll actually get compiled and to 193# avoid the need to duplicate the US rules in another file. 194 195# Zone NAME GMTOFF RULES FORMAT [UNTIL] 196Zone EST -5:00 - EST 197Zone MST -7:00 - MST 198Zone HST -10:00 - HST 199Zone EST5EDT -5:00 US E%sT 200Zone CST6CDT -6:00 US C%sT 201Zone MST7MDT -7:00 US M%sT 202Zone PST8PDT -8:00 US P%sT 203 204# From Bob Devine (1988-01-28): 205# ...Alaska (and Hawaii) had the timezone names changed in 1967. 206# old new 207# Pacific Standard Time(PST) -same- 208# Yukon Standard Time(YST) -same- 209# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 210# Nome Standard Time (NT) Bering Standard Time (BST) 211# 212# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 213# The YST zone now covers nearly all of the state, AHST just part 214# of the Aleutian islands. No DST. 215 216# From Paul Eggert (1995-12-19): 217# The tables below use 'NST', not 'NT', for Nome Standard Time. 218# I invented 'CAWT' for Central Alaska War Time. 219 220# From U. S. Naval Observatory (1989-01-19): 221# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 222# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 223# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 224# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 225# USA MOUNTAIN 7 H BEHIND UTC DENVER 226# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 227# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 228# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 229# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 230# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 231# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 232# USA " 9 H BEHIND UTC APR 3 - OCT 30 233# USA HAWAII 10 H BEHIND UTC 234# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 235 236# From Arthur David Olson (1989-01-21): 237# The above dates are for 1988. 238# Note the "AKST" and "AKDT" abbreviations, the claim that there's 239# no DST in Samoa, and the claim that there is DST in Alaska and the 240# Aleutians. 241 242# From Arthur David Olson (1988-02-13): 243# Legal standard time zone names, from United States Code (1982 Edition and 244# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 245# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 246# took effect), as explained in sections 263 and 261: 247# (none) 248# United States standard eastern time 249# United States standard mountain time 250# United States standard central time 251# United States standard Pacific time 252# (none) 253# United States standard Alaska time 254# (none) 255# Next, names from 1967-04-01 until 1983-11-30 (the date for 256# public law 98-181): 257# Atlantic standard time 258# eastern standard time 259# central standard time 260# mountain standard time 261# Pacific standard time 262# Yukon standard time 263# Alaska-Hawaii standard time 264# Bering standard time 265# And after 1983-11-30: 266# Atlantic standard time 267# eastern standard time 268# central standard time 269# mountain standard time 270# Pacific standard time 271# Alaska standard time 272# Hawaii-Aleutian standard time 273# Samoa standard time 274# The law doesn't give abbreviations. 275# 276# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 277# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" 278# for time in Guam and the Northern Marianas. See the file "australasia". 279# 280# From Paul Eggert (2015-04-17): 281# HST and HDT are standardized abbreviations for Hawaii-Aleutian 282# standard and daylight times. See section 9.47 (p 234) of the 283# U.S. Government Printing Office Style Manual (2008) 284# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 285 286# From Arthur David Olson, 2005-08-09 287# The following was signed into law on 2005-08-08. 288# 289# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 290# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 291# U.S.C. 260a(a)) is amended-- 292# (1) by striking "first Sunday of April" and inserting "second 293# Sunday of March"; and 294# (2) by striking "last Sunday of October" and inserting "first 295# Sunday of November'. 296# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 297# date of enactment of this Act or March 1, 2007, whichever is later. 298# (c) Report to Congress.--Not later than 9 months after the effective 299# date stated in subsection (b), the Secretary shall report to Congress 300# on the impact of this section on energy consumption in the United 301# States. 302# (d) Right to Revert.--Congress retains the right to revert the 303# Daylight Saving Time back to the 2005 time schedules once the 304# Department study is complete. 305 306# US eastern time, represented by New York 307 308# Connecticut, Delaware, District of Columbia, most of Florida, 309# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 310# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 311# New Hampshire, New Jersey, New York, North Carolina, Ohio, 312# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 313# Vermont, Virginia, West Virginia 314 315# From Dave Cantor (2004-11-02): 316# Early this summer I had the occasion to visit the Mount Washington 317# Observatory weather station atop (of course!) Mount Washington [, NH].... 318# One of the staff members said that the station was on Eastern Standard Time 319# and didn't change their clocks for Daylight Saving ... so that their 320# reports will always have times which are 5 hours behind UTC. 321 322# From Paul Eggert (2005-08-26): 323# According to today's Huntsville Times 324# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 325# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 326# in Russell County, Lanett in Chambers County and some towns in Lee County, 327# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 328# Roberts, city administrator in Phenix City. as saying "We are in the Central 329# time zone, but we do go by the Eastern time zone because so many people work 330# in Columbus." 331 332# From Paul Eggert (2014-09-06): 333# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 334# says that New York City Hall time was 3 minutes 58.4 seconds fast of 335# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 336# nearest second. 337 338# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 339Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 340Rule NYC 1920 only - Oct lastSun 2:00 0 S 341Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 342Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 343Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 344# Zone NAME GMTOFF RULES FORMAT [UNTIL] 345Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 346 -5:00 US E%sT 1920 347 -5:00 NYC E%sT 1942 348 -5:00 US E%sT 1946 349 -5:00 NYC E%sT 1967 350 -5:00 US E%sT 351 352# US central time, represented by Chicago 353 354# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 355# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 356# Washington counties), Illinois, western Indiana 357# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 358# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 359# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 360# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 361# western Tennessee, most of Texas, Wisconsin 362 363# From Larry M. Smith (2006-04-26) re Wisconsin: 364# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 365# is currently enforced at the 01:00 time of change. Because the local 366# "bar time" in the state corresponds to 02:00, a number of citations 367# are issued for the "sale of class 'B' alcohol after prohibited 368# hours" within the deviated hour of this change every year.... 369# 370# From Douglas R. Bomberg (2007-03-12): 371# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 372# Statue 175 closer in synch with the US Congress' intent.... 373# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 374 375# From an email administrator of the City of Fort Pierre, SD (2015-12-21): 376# Fort Pierre is technically located in the Mountain time zone as is 377# the rest of Stanley County. Most of Stanley County and Fort Pierre 378# uses the Central time zone due to doing most of their business in 379# Pierre so it simplifies schedules. I have lived in Stanley County 380# all my life and it has been that way since I can remember. (43 years!) 381# 382# From Paul Eggert (2015-12-25): 383# Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 384 385# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 386Rule Chicago 1920 only - Jun 13 2:00 1:00 D 387Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 388Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 389Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 390Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 391Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 392# Zone NAME GMTOFF RULES FORMAT [UNTIL] 393Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 394 -6:00 US C%sT 1920 395 -6:00 Chicago C%sT 1936 Mar 1 2:00 396 -5:00 - EST 1936 Nov 15 2:00 397 -6:00 Chicago C%sT 1942 398 -6:00 US C%sT 1946 399 -6:00 Chicago C%sT 1967 400 -6:00 US C%sT 401# Oliver County, ND switched from mountain to central time on 1992-10-25. 402Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 403 -7:00 US M%sT 1992 Oct 25 2:00 404 -6:00 US C%sT 405# Morton County, ND, switched from mountain to central time on 406# 2003-10-26, except for the area around Mandan which was already central time. 407# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 408# Officially this switch also included part of Sioux County, and 409# Jones, Mellette, and Todd Counties in South Dakota; 410# but in practice these other counties were already observing central time. 411# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 412Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 413 -7:00 US M%sT 2003 Oct 26 2:00 414 -6:00 US C%sT 415 416# From Josh Findley (2011-01-21): 417# ...it appears that Mercer County, North Dakota, changed from the 418# mountain time zone to the central time zone at the last transition from 419# daylight-saving to standard time (on Nov. 7, 2010): 420# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 421# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 422 423# From Andy Lipscomb (2011-01-24): 424# ...according to the Census Bureau, the largest city is Beulah (although 425# it's commonly referred to as Beulah-Hazen, with Hazen being the next 426# largest city in Mercer County). Google Maps places Beulah's city hall 427# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 428# of 6h47'07". 429 430Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 431 -7:00 US M%sT 2010 Nov 7 2:00 432 -6:00 US C%sT 433 434# US mountain time, represented by Denver 435# 436# Colorado, far western Kansas, Montana, western 437# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 438# New Mexico, southwestern North Dakota, 439# western South Dakota, far western Texas (El Paso County, Hudspeth County, 440# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 441# 442# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 443Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 444Rule Denver 1920 only - Oct lastSun 2:00 0 S 445Rule Denver 1921 only - May 22 2:00 0 S 446Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 447Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 448# Zone NAME GMTOFF RULES FORMAT [UNTIL] 449Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 450 -7:00 US M%sT 1920 451 -7:00 Denver M%sT 1942 452 -7:00 US M%sT 1946 453 -7:00 Denver M%sT 1967 454 -7:00 US M%sT 455 456# US Pacific time, represented by Los Angeles 457# 458# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 459# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 460# north of the Salmon River, and the towns of Burgdorf and Warren), 461# Nevada (except West Wendover), Oregon (except the northern 3/4 of 462# Malheur county), and Washington 463 464# From Paul Eggert (2016-08-20): 465# In early February 1948, in response to California's electricity shortage, 466# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 467# causing electric clocks to lose six minutes per day. (This did not change 468# legal time, and is not part of the data here.) See: 469# Ross SA. An energy crisis from the past: Northern California in 1948. 470# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 471# 1973-11. http://escholarship.org/uc/item/8x22k30c 472# 473# In another measure to save electricity, DST was instituted from 1948-03-14 474# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 475# the fallback transition earlier. See pages 3-4 of: 476# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 477# 478# In response: 479# 480# Governor Warren received a torrent of objecting mail, and it is not too much 481# to speculate that the objections to Daylight Saving Time were one important 482# factor in the defeat of the Dewey-Warren Presidential ticket in California. 483# -- Ross, p 25 484# 485# On December 8 the governor exercised the option, setting the date to January 1 486# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 487# 488# Despite the controversy, in 1949 California voters approved Proposition 12, 489# which established DST from April's last Sunday at 01:00 until September's 490# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 491# the fall-back date to October's last Sunday. See: 492# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 493# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 494# 495# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 496Rule CA 1948 only - Mar 14 2:01 1:00 D 497Rule CA 1949 only - Jan 1 2:00 0 S 498Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D 499Rule CA 1950 1961 - Sep lastSun 2:00 0 S 500Rule CA 1962 1966 - Oct lastSun 2:00 0 S 501# Zone NAME GMTOFF RULES FORMAT [UNTIL] 502Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 503 -8:00 US P%sT 1946 504 -8:00 CA P%sT 1967 505 -8:00 US P%sT 506 507# Alaska 508# AK%sT is the modern abbreviation for -9:00 per USNO. 509# 510# From Paul Eggert (2001-05-30): 511# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 512# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 513# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 514# also a Friday. Include only the time zone part of this transition, 515# ignoring the switch from Julian to Gregorian, since we can't represent 516# the Julian calendar. 517# 518# As far as we know, none of the exact locations mentioned below were 519# permanently inhabited in 1867 by anyone using either calendar. 520# (Yakutat was colonized by the Russians in 1799, but the settlement 521# was destroyed in 1805 by a Yakutat-kon war party.) However, there 522# were nearby inhabitants in some cases and for our purposes perhaps 523# it's best to simply use the official transition. 524 525# From Paul Eggert (2014-07-18): 526# One opinion of the early-1980s turmoil in Alaska over time zones and 527# daylight saving time appeared as graffiti on a Juneau airport wall: 528# "Welcome to Juneau. Please turn your watch back to the 19th century." 529# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 530# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 531# 532# Steve Ferguson (2011-01-31) referred to the following source: 533# Norris F. Keeping time in Alaska: national directives, local response. 534# Alaska History 2001;16(1-2). 535# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 536 537# From Arthur David Olson (2011-02-01): 538# Here's database-relevant material from the 2001 "Alaska History" article: 539# 540# On September 20 [1979]...DOT...officials decreed that on April 27, 541# 1980, Juneau and other nearby communities would move to Yukon Time. 542# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 543# Pacific Time. 544# 545# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 546# Department's September 1979 decision. Juneau and other communities in 547# northern Southeast reverted to Pacific Time on October 26. 548# 549# On October 28 [1983]...the Metlakatla Indian Community Council voted 550# unanimously to keep the reservation on Pacific Time. 551# 552# According to DOT official Joanne Petrie, Indian reservations are not 553# bound to follow time zones imposed by neighboring jurisdictions. 554# 555# (The last is consistent with how the database now handles the Navajo 556# Nation.) 557 558# From Arthur David Olson (2011-02-09): 559# I just spoke by phone with a staff member at the Metlakatla Indian 560# Community office (using contact information available at 561# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 562# It's shortly after 1:00 here on the east coast of the United States; 563# the staffer said it was shortly after 10:00 there. When I asked whether 564# that meant they were on Pacific time, they said no - they were on their 565# own time. I asked about daylight saving; they said it wasn't used. I 566# did not inquire about practices in the past. 567 568# From Arthur David Olson (2011-08-17): 569# For lack of better information, assume that Metlakatla's 570# abandonment of use of daylight saving resulted from the 1983 vote. 571 572# From Steffen Thorsen (2015-11-09): 573# It seems Metlakatla did go off PST on Sunday, November 1, changing 574# their time to AKST and are going to follow Alaska's DST, switching 575# between AKST and AKDT from now on.... 576# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 577 578# Zone NAME GMTOFF RULES FORMAT [UNTIL] 579Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 580 -8:57:41 - LMT 1900 Aug 20 12:00 581 -8:00 - PST 1942 582 -8:00 US P%sT 1946 583 -8:00 - PST 1969 584 -8:00 US P%sT 1980 Apr 27 2:00 585 -9:00 US Y%sT 1980 Oct 26 2:00 586 -8:00 US P%sT 1983 Oct 30 2:00 587 -9:00 US Y%sT 1983 Nov 30 588 -9:00 US AK%sT 589Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 590 -9:01:13 - LMT 1900 Aug 20 12:00 591 -8:00 - PST 1942 592 -8:00 US P%sT 1946 593 -8:00 - PST 1969 594 -8:00 US P%sT 1983 Oct 30 2:00 595 -9:00 US Y%sT 1983 Nov 30 596 -9:00 US AK%sT 597Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 598 -8:46:18 - LMT 1900 Aug 20 12:00 599 -8:00 - PST 1942 600 -8:00 US P%sT 1946 601 -8:00 - PST 1969 602 -8:00 US P%sT 1983 Oct 30 2:00 603 -8:00 - PST 2015 Nov 1 2:00 604 -9:00 US AK%sT 605Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 606 -9:18:55 - LMT 1900 Aug 20 12:00 607 -9:00 - YST 1942 608 -9:00 US Y%sT 1946 609 -9:00 - YST 1969 610 -9:00 US Y%sT 1983 Nov 30 611 -9:00 US AK%sT 612Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 613 -9:59:36 - LMT 1900 Aug 20 12:00 614 -10:00 - CAT 1942 615 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 616 -10:00 US CAT/CAPT 1946 # Peace 617 -10:00 - CAT 1967 Apr 618 -10:00 - AHST 1969 619 -10:00 US AH%sT 1983 Oct 30 2:00 620 -9:00 US Y%sT 1983 Nov 30 621 -9:00 US AK%sT 622Zone America/Nome 12:58:21 - LMT 1867 Oct 18 623 -11:01:38 - LMT 1900 Aug 20 12:00 624 -11:00 - NST 1942 625 -11:00 US N%sT 1946 626 -11:00 - NST 1967 Apr 627 -11:00 - BST 1969 628 -11:00 US B%sT 1983 Oct 30 2:00 629 -9:00 US Y%sT 1983 Nov 30 630 -9:00 US AK%sT 631Zone America/Adak 12:13:21 - LMT 1867 Oct 18 632 -11:46:38 - LMT 1900 Aug 20 12:00 633 -11:00 - NST 1942 634 -11:00 US N%sT 1946 635 -11:00 - NST 1967 Apr 636 -11:00 - BST 1969 637 -11:00 US B%sT 1983 Oct 30 2:00 638 -10:00 US AH%sT 1983 Nov 30 639 -10:00 US H%sT 640# The following switches don't quite make our 1970 cutoff. 641# 642# Shanks writes that part of southwest Alaska (e.g. Aniak) 643# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 644# and another part (e.g. Akiak) made the same switch five weeks later. 645# 646# From David Flater (2004-11-09): 647# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 648# Historic Preservation Commission, provided this information, which 649# suggests that Unalaska deviated from statutory time from early 1967 650# possibly until 1983: 651# 652# Minutes of the Unalaska City Council Meeting, January 10, 1967: 653# "Except for St. Paul and Akutan, Unalaska is the only important 654# location not on Alaska Standard Time. The following resolution was 655# made by William Robinson and seconded by Henry Swanson: Be it 656# resolved that the City of Unalaska hereby goes to Alaska Standard 657# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 658# January 14, Alaska Standard Time.) This resolution was passed with 659# three votes for and one against." 660 661# Hawaii 662 663# From Arthur David Olson (2010-12-09): 664# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 665# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 666# the article is available at 667# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 668# and indicates that standard time was adopted effective noon, January 669# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 670# saving for the period between the last Sunday of each April and the 671# last Sunday of each September, but less than a month later repealed the 672# act," (page 220), that year-round daylight saving time was in effect 673# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 674# when clocks changed) and that clocks were changed by 30 minutes 675# effective the second Sunday of June, 1947 (page 219, with no time of 676# day given for when clocks changed). A footnote for the 1933 changes 677# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 678# and Act 163 (approved 21 May 1933)." 679 680# From Arthur David Olson (2011-01-19): 681# The following is from "Laws of the Territory of Hawaii Passed by the 682# Seventeenth Legislature: Regular Session 1933," available (as of 683# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 684# 90...At 2 o'clock ante meridian of the last Sunday in April of each 685# year, the standard time of this Territory shall be advanced one 686# hour...This Act shall take effect upon its approval. Approved this 26th 687# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 688# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 689# hereby repealed...This Act shall take effect upon its approval, upon 690# which date the standard time of this Territory shall be restored to 691# that existing immediately prior to the taking effect of said Act 90. 692# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 693# of the Territory of Hawaii." 694# 695# Note that 1933-05-21 was a Sunday. 696# We're left to guess the time of day when Act 163 was approved; guess noon. 697 698# Zone NAME GMTOFF RULES FORMAT [UNTIL] 699Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 700 -10:30 - HST 1933 Apr 30 2:00 701 -10:30 1:00 HDT 1933 May 21 12:00 702 -10:30 - HST 1942 Feb 9 2:00 703 -10:30 1:00 HDT 1945 Sep 30 2:00 704 -10:30 - HST 1947 Jun 8 2:00 705 -10:00 - HST 706Link Pacific/Honolulu Pacific/Johnston 707 708# Now we turn to US areas that have diverged from the consensus since 1970. 709 710# Arizona mostly uses MST. 711 712# From Paul Eggert (2002-10-20): 713# 714# The information in the rest of this paragraph is derived from the 715# Daylight Saving Time web page 716# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 717# maintained by the Arizona State Library, Archives and Public Records. 718# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 719# time, but by federal law railroads, airlines, bus lines, military 720# personnel, and some engaged in interstate commerce continued to 721# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 722# Gazette says that was the date the law changed, and that 04-01 was 723# the date the state's clocks would change. In 1945 the State of 724# Arizona used standard time all year, again with exceptions only as 725# mandated by federal law. Arizona observed DST in 1967, but Arizona 726# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 727# 728# Shanks says the 1944 experiment came to an end on 1944-03-17. 729# Go with the Arizona State Library instead. 730 731# Zone NAME GMTOFF RULES FORMAT [UNTIL] 732Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 733 -7:00 US M%sT 1944 Jan 1 0:01 734 -7:00 - MST 1944 Apr 1 0:01 735 -7:00 US M%sT 1944 Oct 1 0:01 736 -7:00 - MST 1967 737 -7:00 US M%sT 1968 Mar 21 738 -7:00 - MST 739# From Arthur David Olson (1988-02-13): 740# A writer from the Inter Tribal Council of Arizona, Inc., 741# notes in private correspondence dated 1987-12-28 that "Presently, only the 742# Navajo Nation participates in the Daylight Saving Time policy, due to its 743# large size and location in three states." (The "only" means that other 744# tribal nations don't use DST.) 745# 746# From Paul Eggert (2013-08-26): 747# See America/Denver for a zone appropriate for the Navajo Nation. 748 749# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 750# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 751# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 752# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 753# Teton, Twin Falls, Valley, Washington counties, and the southern 754# quarter of Idaho county) and eastern Oregon (most of Malheur County) 755# switched four weeks late in 1974. 756# 757# Zone NAME GMTOFF RULES FORMAT [UNTIL] 758Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 759 -8:00 US P%sT 1923 May 13 2:00 760 -7:00 US M%sT 1974 761 -7:00 - MST 1974 Feb 3 2:00 762 -7:00 US M%sT 763 764# Indiana 765# 766# For a map of Indiana's time zone regions, see: 767# http://en.wikipedia.org/wiki/Time_in_Indiana 768# 769# From Paul Eggert (2007-08-17): 770# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 771# with the following exceptions: 772# 773# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 774# Vanderburgh, and Warrick counties have been like America/Chicago. 775# 776# - Dearborn and Ohio counties have been like America/New_York. 777# 778# - Clark, Floyd, and Harrison counties have been like 779# America/Kentucky/Louisville. 780# 781# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 782# and Switzerland counties have their own time zone histories as noted below. 783# 784# Shanks partitioned Indiana into 345 regions, each with its own time history, 785# and wrote "Even newspaper reports present contradictory information." 786# Those Hoosiers! Such a flighty and changeable people! 787# Fortunately, most of the complexity occurred before our cutoff date of 1970. 788# 789# Other than Indianapolis, the Indiana place names are so nondescript 790# that they would be ambiguous if we left them at the 'America' level. 791# So we reluctantly put them all in a subdirectory 'America/Indiana'. 792 793# From Paul Eggert (2014-06-26): 794# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 795# says "DOT is relocating the time zone boundary in Indiana to move Starke, 796# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 797# Eastern Time Zone to the Central Time Zone.... The effective date of 798# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 799# changeover date from standard time to Daylight Saving Time." 800# Strictly speaking, this meant the affected counties changed their 801# clocks twice that night, but this obviously was in error. The intent 802# was that 01:59:59 EST be followed by 02:00:00 CDT. 803 804# From Gwillim Law (2007-02-10): 805# The Associated Press has been reporting that Pulaski County, Indiana is 806# going to switch from Central to Eastern Time on March 11, 2007.... 807# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 808 809# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 810Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 811Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 812Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 813# Zone NAME GMTOFF RULES FORMAT [UNTIL] 814Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 815 -6:00 US C%sT 1920 816 -6:00 Indianapolis C%sT 1942 817 -6:00 US C%sT 1946 818 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 819 -5:00 - EST 1957 Sep 29 2:00 820 -6:00 - CST 1958 Apr 27 2:00 821 -5:00 - EST 1969 822 -5:00 US E%sT 1971 823 -5:00 - EST 2006 824 -5:00 US E%sT 825# 826# Eastern Crawford County, Indiana, left its clocks alone in 1974, 827# as well as from 1976 through 2005. 828# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 829Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 830Rule Marengo 1951 only - Sep lastSun 2:00 0 S 831Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 832Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 833# Zone NAME GMTOFF RULES FORMAT [UNTIL] 834Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 835 -6:00 US C%sT 1951 836 -6:00 Marengo C%sT 1961 Apr 30 2:00 837 -5:00 - EST 1969 838 -5:00 US E%sT 1974 Jan 6 2:00 839 -6:00 1:00 CDT 1974 Oct 27 2:00 840 -5:00 US E%sT 1976 841 -5:00 - EST 2006 842 -5:00 US E%sT 843# 844# Daviess, Dubois, Knox, and Martin Counties, Indiana, 845# switched from eastern to central time in April 2006, then switched back 846# in November 2007. 847# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 848Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 849Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 850Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 851Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 852Rule Vincennes 1955 only - May 1 0:00 1:00 D 853Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 854Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 855Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 856Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 857# Zone NAME GMTOFF RULES FORMAT [UNTIL] 858Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 859 -6:00 US C%sT 1946 860 -6:00 Vincennes C%sT 1964 Apr 26 2:00 861 -5:00 - EST 1969 862 -5:00 US E%sT 1971 863 -5:00 - EST 2006 Apr 2 2:00 864 -6:00 US C%sT 2007 Nov 4 2:00 865 -5:00 US E%sT 866# 867# Perry County, Indiana, switched from eastern to central time in April 2006. 868# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 869Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 870Rule Perry 1946 only - Sep lastSun 2:00 0 S 871Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 872Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 873Rule Perry 1955 only - May 1 0:00 1:00 D 874Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 875Rule Perry 1960 only - Oct lastSun 2:00 0 S 876Rule Perry 1961 only - Sep lastSun 2:00 0 S 877Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 878# Zone NAME GMTOFF RULES FORMAT [UNTIL] 879Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 880 -6:00 US C%sT 1946 881 -6:00 Perry C%sT 1964 Apr 26 2:00 882 -5:00 - EST 1969 883 -5:00 US E%sT 1971 884 -5:00 - EST 2006 Apr 2 2:00 885 -6:00 US C%sT 886# 887# Pike County, Indiana moved from central to eastern time in 1977, 888# then switched back in 2006, then switched back again in 2007. 889# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 890Rule Pike 1955 only - May 1 0:00 1:00 D 891Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 892Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 893Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 894# Zone NAME GMTOFF RULES FORMAT [UNTIL] 895Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 896 -6:00 US C%sT 1955 897 -6:00 Pike C%sT 1965 Apr 25 2:00 898 -5:00 - EST 1966 Oct 30 2:00 899 -6:00 US C%sT 1977 Oct 30 2:00 900 -5:00 - EST 2006 Apr 2 2:00 901 -6:00 US C%sT 2007 Nov 4 2:00 902 -5:00 US E%sT 903# 904# Starke County, Indiana moved from central to eastern time in 1991, 905# then switched back in 2006. 906# From Arthur David Olson (1991-10-28): 907# An article on page A3 of the Sunday, 1991-10-27 Washington Post 908# notes that Starke County switched from Central time to Eastern time as of 909# 1991-10-27. 910# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 911Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 912Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 913Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 914Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 915Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 916# Zone NAME GMTOFF RULES FORMAT [UNTIL] 917Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 918 -6:00 US C%sT 1947 919 -6:00 Starke C%sT 1962 Apr 29 2:00 920 -5:00 - EST 1963 Oct 27 2:00 921 -6:00 US C%sT 1991 Oct 27 2:00 922 -5:00 - EST 2006 Apr 2 2:00 923 -6:00 US C%sT 924# 925# Pulaski County, Indiana, switched from eastern to central time in 926# April 2006 and then switched back in March 2007. 927# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 928Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 929Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 930Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 931Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 932# Zone NAME GMTOFF RULES FORMAT [UNTIL] 933Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 934 -6:00 US C%sT 1946 935 -6:00 Pulaski C%sT 1961 Apr 30 2:00 936 -5:00 - EST 1969 937 -5:00 US E%sT 1971 938 -5:00 - EST 2006 Apr 2 2:00 939 -6:00 US C%sT 2007 Mar 11 2:00 940 -5:00 US E%sT 941# 942# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 943# Zone NAME GMTOFF RULES FORMAT [UNTIL] 944Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 945 -6:00 US C%sT 1954 Apr 25 2:00 946 -5:00 - EST 1969 947 -5:00 US E%sT 1973 948 -5:00 - EST 2006 949 -5:00 US E%sT 950 951# Part of Kentucky left its clocks alone in 1974. 952# This also includes Clark, Floyd, and Harrison counties in Indiana. 953# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 954Rule Louisville 1921 only - May 1 2:00 1:00 D 955Rule Louisville 1921 only - Sep 1 2:00 0 S 956Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 957Rule Louisville 1941 only - Sep lastSun 2:00 0 S 958Rule Louisville 1946 only - Jun 2 2:00 0 S 959Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 960Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 961# Zone NAME GMTOFF RULES FORMAT [UNTIL] 962Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 963 -6:00 US C%sT 1921 964 -6:00 Louisville C%sT 1942 965 -6:00 US C%sT 1946 966 -6:00 Louisville C%sT 1961 Jul 23 2:00 967 -5:00 - EST 1968 968 -5:00 US E%sT 1974 Jan 6 2:00 969 -6:00 1:00 CDT 1974 Oct 27 2:00 970 -5:00 US E%sT 971# 972# Wayne County, Kentucky 973# 974# From Lake Cumberland LIFE 975# http://www.lake-cumberland.com/life/archive/news990129time.shtml 976# (1999-01-29) via WKYM-101.7: 977# Clinton County has joined Wayne County in asking the DoT to change from 978# the Central to the Eastern time zone.... The Wayne County government made 979# the same request in December. And while Russell County officials have not 980# taken action, the majority of respondents to a poll conducted there in 981# August indicated they would like to change to "fast time" also. 982# The three Lake Cumberland counties are the farthest east of any U.S. 983# location in the Central time zone. 984# 985# From Rich Wales (2000-08-29): 986# After prolonged debate, and despite continuing deep differences of opinion, 987# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 988# (-0500) time. They won't "fall back" this year. See Sara Shipley, 989# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 990# 991# From Paul Eggert (2001-07-16): 992# The final rule was published in the 993# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 994# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 995# 996Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 997 -6:00 US C%sT 1946 998 -6:00 - CST 1968 999 -6:00 US C%sT 2000 Oct 29 2:00 1000 -5:00 US E%sT 1001 1002 1003# From Rives McDow (2000-08-30): 1004# Here ... are all the changes in the US since 1985. 1005# Kearny County, KS (put all of county on central; 1006# previously split between MST and CST) ... 1990-10 1007# Starke County, IN (from CST to EST) ... 1991-10 1008# Oliver County, ND (from MST to CST) ... 1992-10 1009# West Wendover, NV (from PST TO MST) ... 1999-10 1010# Wayne County, KY (from CST to EST) ... 2000-10 1011# 1012# From Paul Eggert (2001-07-17): 1013# We don't know where the line used to be within Kearny County, KS, 1014# so omit that change for now. 1015# See America/Indiana/Knox for the Starke County, IN change. 1016# See America/North_Dakota/Center for the Oliver County, ND change. 1017# West Wendover, NV officially switched from Pacific to mountain time on 1018# 1999-10-31. See the 1019# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 1020# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 1021# However, the Federal Register says that West Wendover already operated 1022# on mountain time, and the rule merely made this official; 1023# hence a separate tz entry is not needed. 1024 1025# Michigan 1026# 1027# From Bob Devine (1988-01-28): 1028# Michigan didn't observe DST from 1968 to 1973. 1029# 1030# From Paul Eggert (1999-03-31): 1031# Shanks writes that Michigan started using standard time on 1885-09-18, 1032# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 1033# that Detroit kept 1034# 1035# local time until 1900 when the City Council decreed that clocks should 1036# be put back twenty-eight minutes to Central Standard Time. Half the 1037# city obeyed, half refused. After considerable debate, the decision 1038# was rescinded and the city reverted to Sun time. A derisive offer to 1039# erect a sundial in front of the city hall was referred to the 1040# Committee on Sewers. Then, in 1905, Central time was adopted 1041# by city vote. 1042# 1043# This story is too entertaining to be false, so go with Howse over Shanks. 1044# 1045# From Paul Eggert (2001-03-06): 1046# Garland (1927) writes "Cleveland and Detroit advanced their clocks 1047# one hour in 1914." This change is not in Shanks. We have no more 1048# info, so omit this for now. 1049# 1050# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 1051# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1052Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 1053Rule Detroit 1948 only - Sep lastSun 2:00 0 S 1054Rule Detroit 1967 only - Jun 14 2:00 1:00 D 1055Rule Detroit 1967 only - Oct lastSun 2:00 0 S 1056# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1057Zone America/Detroit -5:32:11 - LMT 1905 1058 -6:00 - CST 1915 May 15 2:00 1059 -5:00 - EST 1942 1060 -5:00 US E%sT 1946 1061 -5:00 Detroit E%sT 1973 1062 -5:00 US E%sT 1975 1063 -5:00 - EST 1975 Apr 27 2:00 1064 -5:00 US E%sT 1065# 1066# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 1067# switched from EST to CST/CDT in 1973. 1068# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1069Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 1070Rule Menominee 1946 only - Sep lastSun 2:00 0 S 1071Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1072Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1073# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1074Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1075 -6:00 US C%sT 1946 1076 -6:00 Menominee C%sT 1969 Apr 27 2:00 1077 -5:00 - EST 1973 Apr 29 2:00 1078 -6:00 US C%sT 1079 1080# Navassa 1081# administered by the US Fish and Wildlife Service 1082# claimed by US under the provisions of the 1856 Guano Islands Act 1083# also claimed by Haiti 1084# occupied 1857/1900 by the Navassa Phosphate Co 1085# US lighthouse 1917/1996-09 1086# currently uninhabited 1087# see Mark Fineman, "An Isle Rich in Guano and Discord", 1088# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1089# Jimmy Skaggs, _The Great Guano Rush_ (1994). 1090 1091################################################################################ 1092 1093 1094# From Paul Eggert (2014-10-31): 1095# 1096# Unless otherwise specified, the source for data through 1990 is: 1097# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1098# San Diego: ACS Publications, Inc. (2003). 1099# Unfortunately this book contains many errors and cites no sources. 1100# 1101# Gwillim Law writes that a good source 1102# for recent time zone data is the International Air Transport 1103# Association's Standard Schedules Information Manual (IATA SSIM), 1104# published semiannually. Law sent in several helpful summaries 1105# of the IATA's data after 1990. Except where otherwise noted, 1106# IATA SSIM is the source for entries after 1990. 1107# 1108# Other sources occasionally used include: 1109# 1110# Edward W. Whitman, World Time Differences, 1111# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1112# which I found in the UCLA library. 1113# 1114# William Willett, The Waste of Daylight, 19th edition 1115# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1116# [PDF] (1914-03) 1117# 1118# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1119# <http://www.jstor.org/stable/1774359>. 1120# 1121# See the 'europe' file for Greenland. 1122 1123# Canada 1124 1125# From Alain LaBont�� (1994-11-14): 1126# I post here the time zone abbreviations standardized in Canada 1127# for both English and French in the CAN/CSA-Z234.4-89 standard.... 1128# 1129# UTC Standard time Daylight saving time 1130# offset French English French English 1131# -2:30 - - HAT NDT 1132# -3 - - HAA ADT 1133# -3:30 HNT NST - - 1134# -4 HNA AST HAE EDT 1135# -5 HNE EST HAC CDT 1136# -6 HNC CST HAR MDT 1137# -7 HNR MST HAP PDT 1138# -8 HNP PST HAY YDT 1139# -9 HNY YST - - 1140# 1141# HN: Heure Normale ST: Standard Time 1142# HA: Heure Avanc��e DT: Daylight saving Time 1143# 1144# A: de l'Atlantique Atlantic 1145# C: du Centre Central 1146# E: de l'Est Eastern 1147# M: Mountain 1148# N: Newfoundland 1149# P: du Pacifique Pacific 1150# R: des Rocheuses 1151# T: de Terre-Neuve 1152# Y: du Yukon Yukon 1153# 1154# From Paul Eggert (1994-11-22): 1155# Alas, this sort of thing must be handled by localization software. 1156 1157# Unless otherwise specified, the data entries for Canada are all from Shanks 1158# & Pottenger. 1159 1160# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1161# 2007-03-01): 1162# The British Columbia government announced yesterday that it will 1163# adjust daylight savings next year to align with changes in the 1164# U.S. and the rest of Canada.... 1165# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1166# ... 1167# Nova Scotia 1168# Daylight saving time will be extended by four weeks starting in 2007.... 1169# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1170# 1171# [For New Brunswick] the new legislation dictates that the time change is to 1172# be done at 02:00 instead of 00:01. 1173# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1174# ... 1175# Manitoba has traditionally changed the clock every fall at 03:00. 1176# As of 2006, the transition is to take place one hour earlier at 02:00. 1177# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1178# ... 1179# [Alberta, Ontario, Quebec] will follow US rules. 1180# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1181# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1182# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1183# ... 1184# P.E.I. will follow US rules.... 1185# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1186# ... 1187# Province of Newfoundland and Labrador.... 1188# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1189# ... 1190# Yukon 1191# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1192# ... 1193# N.W.T. will follow US rules. Whoever maintains the government web site 1194# does not seem to believe in bookmarks. To see the news release, click the 1195# following link and search for "Daylight Savings Time Change". Press the 1196# "Daylight Savings Time Change" link; it will fire off a popup using 1197# JavaScript. 1198# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1199# ... 1200# Nunavut 1201# An amendment to the Interpretation Act was registered on February 19/2007.... 1202# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1203 1204# From Paul Eggert (2014-10-18): 1205# H. David Matthews and Mary Vincent's map 1206# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1207# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1208# contains detailed boundaries for regions observing nonstandard 1209# time and daylight saving time arrangements in Canada circa 1998. 1210# 1211# National Research Council Canada maintains info about time zones and DST. 1212# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1213# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 1214# Its unofficial information is often taken from Matthews and Vincent. 1215 1216# From Paul Eggert (2006-06-27): 1217# For now, assume all of DST-observing Canada will fall into line with the 1218# new US DST rules, 1219 1220# From Chris Walton (2011-12-01) 1221# In the first of Tammy Hardwick's articles 1222# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1223# she quotes the Friday November 1/1918 edition of the Creston Review. 1224# The quote includes these two statements: 1225# 'Sunday the CPR went back to the old system of time...' 1226# '... The daylight saving scheme was dropped all over Canada at the same time,' 1227# These statements refer to a transition from daylight time to standard time 1228# that occurred nationally on Sunday October 27/1918. This transition was 1229# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1230 1231# In light of that evidence, we alter the date from the earlier believed 1232# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1233# than Thursday) in all Canadian rulesets. 1234 1235# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1236Rule Canada 1918 only - Apr 14 2:00 1:00 D 1237Rule Canada 1918 only - Oct 27 2:00 0 S 1238Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1239Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1240Rule Canada 1945 only - Sep 30 2:00 0 S 1241Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1242Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1243Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1244Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1245Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1246 1247 1248# Newfoundland and Labrador 1249 1250# From Paul Eggert (2000-10-02): 1251# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1252# but the only part of Labrador that follows the rules is the 1253# southeast corner, including Port Hope Simpson and Mary's Harbour, 1254# but excluding, say, Black Tickle. 1255 1256# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1257Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1258Rule StJohns 1917 only - Sep 17 2:00 0 S 1259# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1260Rule StJohns 1919 only - May 5 23:00 1:00 D 1261Rule StJohns 1919 only - Aug 12 23:00 0 S 1262# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1263Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1264Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1265# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1266# Pottenger. 1267Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1268Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1269# Whitman gives the following transitions: 1270# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1271# but go with Shanks & Pottenger and assume they used Canadian rules. 1272# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1273# Apr 30 - Sep 24; go with Shanks & Pottenger. 1274Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1275Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1276Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1277Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1278Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1279# From Paul Eggert (2000-10-02): 1280# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1281# at 00:01 local time. For now, assume it started in 1987. 1282 1283# From Michael Pelley (2011-09-12): 1284# We received today, Monday, September 12, 2011, notification that the 1285# changes to the Newfoundland Standard Time Act have been proclaimed. 1286# The change in the Act stipulates that the change from Daylight Savings 1287# Time to Standard Time and from Standard Time to Daylight Savings Time 1288# now occurs at 2:00AM. 1289# ... 1290# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1291# ... 1292# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1293# Office of the Chief Information Officer 1294# Executive Council 1295# Government of Newfoundland & Labrador 1296 1297Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1298Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1299Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1300Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1301Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1302Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1303# 1304# St John's has an apostrophe, but Posix file names can't have apostrophes. 1305# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1306Zone America/St_Johns -3:30:52 - LMT 1884 1307 -3:30:52 StJohns N%sT 1918 1308 -3:30:52 Canada N%sT 1919 1309 -3:30:52 StJohns N%sT 1935 Mar 30 1310 -3:30 StJohns N%sT 1942 May 11 1311 -3:30 Canada N%sT 1946 1312 -3:30 StJohns N%sT 2011 Nov 1313 -3:30 Canada N%sT 1314 1315# most of east Labrador 1316 1317# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1318# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1319Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1320 -3:30:52 - NST 1918 1321 -3:30:52 Canada N%sT 1919 1322 -3:30:52 - NST 1935 Mar 30 1323 -3:30 - NST 1936 1324 -3:30 StJohns N%sT 1942 May 11 1325 -3:30 Canada N%sT 1946 1326 -3:30 StJohns N%sT 1966 Mar 15 2:00 1327 -4:00 StJohns A%sT 2011 Nov 1328 -4:00 Canada A%sT 1329 1330 1331# west Labrador, Nova Scotia, Prince Edward I 1332 1333# From Brian Inglis (2015-07-20): 1334# From the historical weather station records available at: 1335# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1336# Sydney shares the same time history as Glace Bay, so was 1337# likely to be the same across the island.... 1338# Sydney, as the capital and most populous location, or Cape Breton, would 1339# have been better names for the zone had we known this in 1996. 1340 1341# From Paul Eggert (2015-07-20): 1342# Shanks & Pottenger write that since 1970 most of this region has been like 1343# Halifax. Many locales did not observe peacetime DST until 1972; 1344# the Cape Breton area, represented by Glace Bay, is the largest we know of 1345# (Glace Bay was perhaps not the best name choice but no point changing now). 1346# Shanks & Pottenger also write that Liverpool, NS was the only town 1347# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1348# this is a typo. 1349 1350# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1351Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1352Rule Halifax 1916 only - Oct 1 0:00 0 S 1353Rule Halifax 1920 only - May 9 0:00 1:00 D 1354Rule Halifax 1920 only - Aug 29 0:00 0 S 1355Rule Halifax 1921 only - May 6 0:00 1:00 D 1356Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1357Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1358Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1359Rule Halifax 1923 only - Sep 4 0:00 0 S 1360Rule Halifax 1924 only - Sep 15 0:00 0 S 1361Rule Halifax 1925 only - Sep 28 0:00 0 S 1362Rule Halifax 1926 only - May 16 0:00 1:00 D 1363Rule Halifax 1926 only - Sep 13 0:00 0 S 1364Rule Halifax 1927 only - May 1 0:00 1:00 D 1365Rule Halifax 1927 only - Sep 26 0:00 0 S 1366Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1367Rule Halifax 1928 only - Sep 9 0:00 0 S 1368Rule Halifax 1929 only - Sep 3 0:00 0 S 1369Rule Halifax 1930 only - Sep 15 0:00 0 S 1370Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1371Rule Halifax 1932 only - May 1 0:00 1:00 D 1372Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1373Rule Halifax 1933 only - Oct 2 0:00 0 S 1374Rule Halifax 1934 only - May 20 0:00 1:00 D 1375Rule Halifax 1934 only - Sep 16 0:00 0 S 1376Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1377Rule Halifax 1935 only - Sep 30 0:00 0 S 1378Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1379Rule Halifax 1936 only - Sep 14 0:00 0 S 1380Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1381Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1382Rule Halifax 1939 only - May 28 0:00 1:00 D 1383Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1384Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1385Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1386Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1387Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1388Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1389Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1390Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1391Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1392# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1393Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1394 -4:00 Halifax A%sT 1918 1395 -4:00 Canada A%sT 1919 1396 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1397 -4:00 Canada A%sT 1946 1398 -4:00 Halifax A%sT 1974 1399 -4:00 Canada A%sT 1400Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1401 -4:00 Canada A%sT 1953 1402 -4:00 Halifax A%sT 1954 1403 -4:00 - AST 1972 1404 -4:00 Halifax A%sT 1974 1405 -4:00 Canada A%sT 1406 1407# New Brunswick 1408 1409# From Paul Eggert (2007-01-31): 1410# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1411# says they changed at 00:01 through 2006, and 1412# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1413# clear that this was the case since at least 1993. 1414# For now, assume it started in 1993. 1415 1416# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1417Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1418Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1419Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1420Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1421Rule Moncton 1939 only - May 27 1:00 1:00 D 1422Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1423Rule Moncton 1940 only - May 19 1:00 1:00 D 1424Rule Moncton 1941 only - May 4 1:00 1:00 D 1425Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1426Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1427Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1428Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1429Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1430# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1431Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1432 -5:00 - EST 1902 Jun 15 1433 -4:00 Canada A%sT 1933 1434 -4:00 Moncton A%sT 1942 1435 -4:00 Canada A%sT 1946 1436 -4:00 Moncton A%sT 1973 1437 -4:00 Canada A%sT 1993 1438 -4:00 Moncton A%sT 2007 1439 -4:00 Canada A%sT 1440 1441# Quebec 1442 1443# From Paul Eggert (2015-03-24): 1444# See America/Toronto for most of Quebec, including Montreal. 1445# 1446# Matthews and Vincent (1998) also write that Quebec east of the -63 1447# meridian is supposed to observe AST, but residents as far east as 1448# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1449# The Quebec department of justice writes in 1450# "The situation in Minganie and Basse-C��te-Nord" 1451# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1452# that the coastal strip from just east of Natashquan to Blanc-Sablon 1453# observes Atlantic standard time all year round. 1454# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1455# says this common practice was codified into law as of 2007. 1456# For lack of better info, guess this practice began around 1970, contra to 1457# Shanks & Pottenger who have this region observing AST/ADT. 1458 1459# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1460Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1461 -4:00 Canada A%sT 1970 1462 -4:00 - AST 1463 1464# Ontario 1465 1466# From Paul Eggert (2006-07-09): 1467# Shanks & Pottenger write that since 1970 most of Ontario has been like 1468# Toronto. 1469# Thunder Bay skipped DST in 1973. 1470# Many smaller locales did not observe peacetime DST until 1974; 1471# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1472# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1473 1474# From Mark Brader (2003-07-26): 1475# [According to the Toronto Star] Orillia, Ontario, adopted DST 1476# effective Saturday, 1912-06-22, 22:00; the article mentions that 1477# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1478# have already done so. In Orillia DST was to run until Saturday, 1479# 1912-08-31 (no time mentioned), but it was met with considerable 1480# hostility from certain segments of the public, and was revoked after 1481# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1482# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1483# earlier in June). 1484# 1485# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1486 1487# From Paul Eggert (1997-10-17): 1488# Mark Brader writes that an article in the 1997-10-14 Toronto Star 1489# says that Atikokan, Ontario currently does not observe DST, 1490# but will vote on 11-10 whether to use EST/EDT. 1491# He also writes that the Ontario Time Act (1990, Chapter T.9) 1492# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 1493# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1494# Officially Atikokan is therefore on CST/CDT, and most likely this report 1495# concerns a non-official time observed as a matter of local practice. 1496# 1497# From Paul Eggert (2000-10-02): 1498# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1499# New Osnaburgh observe CST all year, that Big Trout Lake observes 1500# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1501# violation of the official Ontario rules. 1502# 1503# From Paul Eggert (2006-07-09): 1504# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1505# 2005-07-21 Chronicle-Journal, which said: 1506# 1507# The clocks in Atikokan stay set on standard time year-round. 1508# This means they spend about half the time on central time and 1509# the other half on eastern time. 1510# 1511# For the most part, the system works, Mayor Dennis Brown said. 1512# 1513# "The majority of businesses in Atikokan deal more with Eastern 1514# Canada, but there are some that deal with Western Canada," he 1515# said. "I don't see any changes happening here." 1516# 1517# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1518# [New Osnaburgh] follow the same practice." 1519 1520# From Garry McKinnon (2006-07-14) via Chris Walton: 1521# I chatted with a member of my board who has an outstanding memory 1522# and a long history in Atikokan (and in the telecom industry) and he 1523# can say for certain that Atikokan has been practicing the current 1524# time keeping since 1952, at least. 1525 1526# From Paul Eggert (2006-07-17): 1527# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1528# ever since standard time was introduced, but the information from 1529# McKinnon sounds more authoritative. For now, assume that Atikokan 1530# switched to EST immediately after WWII era daylight saving time 1531# ended. This matches the old (less-populous) America/Coral_Harbour 1532# entry since our cutoff date of 1970, so we can move 1533# America/Coral_Harbour to the 'backward' file. 1534 1535# From Mark Brader (2010-03-06): 1536# 1537# Currently the database has: 1538# 1539# # Ontario 1540# 1541# # From Paul Eggert (2006-07-09): 1542# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1543# # Toronto. 1544# # Thunder Bay skipped DST in 1973. 1545# # Many smaller locales did not observe peacetime DST until 1974; 1546# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1547# 1548# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1549# right corner of page 1, it says that Toronto will return to standard 1550# time at 2 am Sunday morning (which agrees with the database), and that: 1551# 1552# The one-hour setback will go into effect throughout most of Ontario, 1553# except in areas like Windsor which remains on standard time all year. 1554# 1555# Windsor is, of course, a lot larger than Nipigon. 1556# 1557# I only came across this incidentally. I don't know if Windsor began 1558# observing DST when Detroit did, or in 1974, or on some other date. 1559# 1560# By the way, the article continues by noting that: 1561# 1562# Some cities in the United States have pushed the deadline back 1563# three weeks and will change over from daylight saving in October. 1564 1565# From Arthur David Olson (2010-07-17): 1566# 1567# "Standard Time and Time Zones in Canada" appeared in 1568# The Journal of The Royal Astronomical Society of Canada, 1569# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1570# was available at 1571# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1572# 1573# It includes the text below (starting on page 57): 1574# 1575# A list of the places in Canada using daylight saving time would 1576# require yearly revision. From information kindly furnished by 1577# the provincial governments and by the postmasters in many cities 1578# and towns, it is found that the following places used daylight sav- 1579# ing in 1930. The information for the province of Quebec is definite, 1580# for the other provinces only approximate: 1581# 1582# Province Daylight saving time used 1583# Prince Edward Island Not used. 1584# Nova Scotia In Halifax only. 1585# New Brunswick In St. John only. 1586# Quebec In the following places: 1587# Montreal Lachine 1588# Quebec Mont-Royal 1589# L��vis Iberville 1590# St. Lambert Cap de la Madel��ine 1591# Verdun Loretteville 1592# Westmount Richmond 1593# Outremont St. J��r��me 1594# Longueuil Greenfield Park 1595# Arvida Waterloo 1596# Chambly-Canton Beaulieu 1597# Melbourne La Tuque 1598# St. Th��ophile Buckingham 1599# Ontario Used generally in the cities and towns along 1600# the southerly part of the province. Not 1601# used in the northwesterly part. 1602# Manitoba Not used. 1603# Saskatchewan In Regina only. 1604# Alberta Not used. 1605# British Columbia Not used. 1606# 1607# With some exceptions, the use of daylight saving may be said to be limited 1608# to those cities and towns lying between Quebec city and Windsor, Ont. 1609 1610# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1611Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1612Rule Toronto 1919 only - Oct 26 0:00 0 S 1613Rule Toronto 1920 only - May 2 2:00 1:00 D 1614Rule Toronto 1920 only - Sep 26 0:00 0 S 1615Rule Toronto 1921 only - May 15 2:00 1:00 D 1616Rule Toronto 1921 only - Sep 15 2:00 0 S 1617Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1618# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1619# was meant. 1620Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1621Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1622# The 1927-to-1939 rules can be expressed more simply as 1623# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1624# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1625# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1626# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1627# The rules below avoid use of Sun>=25 1628# (which pre-2004 versions of zic cannot handle). 1629Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1630Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1631Rule Toronto 1932 only - May 1 2:00 1:00 D 1632Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1633Rule Toronto 1933 only - Oct 1 2:00 0 S 1634Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1635Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1636Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1637Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1638Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1639Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1640Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1641Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1642Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1643# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1644# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1645# is wrong, and that he had confirmed it by checking the 1971-10-30 1646# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1647Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1648 1649# From Paul Eggert (2003-07-27): 1650# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1651# Port Arthur, Ontario, the principle of the Bill has been in 1652# operation for the past three years, and in the City of Moose Jaw, 1653# Saskatchewan, for one year." 1654 1655# From David Bryan via Tory Tronrud, Director/Curator, 1656# Thunder Bay Museum (2003-11-12): 1657# There is some suggestion, however, that, by-law or not, daylight 1658# savings time was being practiced in Fort William and Port Arthur 1659# before 1909.... [I]n 1910, the line between the Eastern and Central 1660# Time Zones was permanently moved about two hundred miles west to 1661# include the Thunder Bay area.... When Canada adopted daylight 1662# savings time in 1916, Fort William and Port Arthur, having done so 1663# already, did not change their clocks.... During the Second World 1664# War,... [t]he cities agreed to implement DST during the summer 1665# months for the remainder of the war years. 1666 1667# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1668Zone America/Toronto -5:17:32 - LMT 1895 1669 -5:00 Canada E%sT 1919 1670 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1671 -5:00 Canada E%sT 1946 1672 -5:00 Toronto E%sT 1974 1673 -5:00 Canada E%sT 1674Zone America/Thunder_Bay -5:57:00 - LMT 1895 1675 -6:00 - CST 1910 1676 -5:00 - EST 1942 1677 -5:00 Canada E%sT 1970 1678 -5:00 Toronto E%sT 1973 1679 -5:00 - EST 1974 1680 -5:00 Canada E%sT 1681Zone America/Nipigon -5:53:04 - LMT 1895 1682 -5:00 Canada E%sT 1940 Sep 29 1683 -5:00 1:00 EDT 1942 Feb 9 2:00s 1684 -5:00 Canada E%sT 1685Zone America/Rainy_River -6:18:16 - LMT 1895 1686 -6:00 Canada C%sT 1940 Sep 29 1687 -6:00 1:00 CDT 1942 Feb 9 2:00s 1688 -6:00 Canada C%sT 1689Zone America/Atikokan -6:06:28 - LMT 1895 1690 -6:00 Canada C%sT 1940 Sep 29 1691 -6:00 1:00 CDT 1942 Feb 9 2:00s 1692 -6:00 Canada C%sT 1945 Sep 30 2:00 1693 -5:00 - EST 1694 1695 1696# Manitoba 1697 1698# From Rob Douglas (2006-04-06): 1699# the old Manitoba Time Act - as amended by Bill 2, assented to 1700# March 27, 1987 ... said ... 1701# "between two o'clock Central Standard Time in the morning of 1702# the first Sunday of April of each year and two o'clock Central 1703# Standard Time in the morning of the last Sunday of October next 1704# following, one hour in advance of Central Standard Time."... 1705# I believe that the English legislation [of the old time act] had 1706# been assented to (March 22, 1967).... 1707# Also, as far as I can tell, there was no order-in-council varying 1708# the time of Daylight Saving Time for 2005 and so the provisions of 1709# the 1987 version would apply - the changeover was at 2:00 Central 1710# Standard Time (i.e. not until 3:00 Central Daylight Time). 1711 1712# From Paul Eggert (2006-04-10): 1713# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1714# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1715# it was also 02:00s in 1966. 1716 1717# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1718Rule Winn 1916 only - Apr 23 0:00 1:00 D 1719Rule Winn 1916 only - Sep 17 0:00 0 S 1720Rule Winn 1918 only - Apr 14 2:00 1:00 D 1721Rule Winn 1918 only - Oct 27 2:00 0 S 1722Rule Winn 1937 only - May 16 2:00 1:00 D 1723Rule Winn 1937 only - Sep 26 2:00 0 S 1724Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1725Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1726Rule Winn 1945 only - Sep lastSun 2:00 0 S 1727Rule Winn 1946 only - May 12 2:00 1:00 D 1728Rule Winn 1946 only - Oct 13 2:00 0 S 1729Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1730Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1731Rule Winn 1950 only - May 1 2:00 1:00 D 1732Rule Winn 1950 only - Sep 30 2:00 0 S 1733Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1734Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1735Rule Winn 1959 only - Oct lastSun 2:00 0 S 1736Rule Winn 1960 only - Sep lastSun 2:00 0 S 1737Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1738Rule Winn 1963 only - Sep 22 2:00 0 S 1739Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1740Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1741Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1742# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1743Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1744 -6:00 Winn C%sT 2006 1745 -6:00 Canada C%sT 1746 1747 1748# Saskatchewan 1749 1750# From Mark Brader (2003-07-26): 1751# The first actual adoption of DST in Canada was at the municipal 1752# level. As the [Toronto] Star put it (1912-06-07), "While people 1753# elsewhere have long been talking of legislation to save daylight, 1754# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1755# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1756# presumably late evening, as below), and would run until "the end of 1757# the summer". The discrepancy between municipal time and railroad 1758# time was noted. 1759 1760# From Paul Eggert (2003-07-27): 1761# Willett (1914-03) notes that DST "has been in operation ... in the 1762# City of Moose Jaw, Saskatchewan, for one year." 1763 1764# From Paul Eggert (2006-03-22): 1765# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1766# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1767# Other western towns (e.g. Lloydminster) are like Edmonton. 1768# Matthews and Vincent (1998) write that Denare Beach and Creighton 1769# are like Winnipeg, in violation of Saskatchewan law. 1770 1771# From W. Jones (1992-11-06): 1772# The. . .below is based on information I got from our law library, the 1773# provincial archives, and the provincial Community Services department. 1774# A precise history would require digging through newspaper archives, and 1775# since you didn't say what you wanted, I didn't bother. 1776# 1777# Saskatchewan is split by a time zone meridian (105W) and over the years 1778# the boundary became pretty ragged as communities near it reevaluated 1779# their affiliations in one direction or the other. In 1965 a provincial 1780# referendum favoured legislating common time practices. 1781# 1782# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1783# Saskatchewan 1978) was proclaimed, and established that the eastern 1784# part of Saskatchewan would use CST year round, that districts in 1785# northwest Saskatchewan would by default follow CST but could opt to 1786# follow Mountain Time rules (thus 1 hour difference in the winter and 1787# zero in the summer), and that districts in southwest Saskatchewan would 1788# by default follow MT but could opt to follow CST. 1789# 1790# It took a few years for the dust to settle (I know one story of a town 1791# on one time zone having its school in another, such that a mom had to 1792# serve her family lunch in two shifts), but presently it seems that only 1793# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1794# rules any more; all other districts appear to have used CST year round 1795# since sometime in the 1960s. 1796 1797# From Chris Walton (2006-06-26): 1798# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1799# long and rather painful to read. 1800# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1801 1802# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1803Rule Regina 1918 only - Apr 14 2:00 1:00 D 1804Rule Regina 1918 only - Oct 27 2:00 0 S 1805Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1806Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1807Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1808Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1809Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1810Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1811Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1812Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1813Rule Regina 1945 only - Sep lastSun 2:00 0 S 1814Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1815Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1816Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1817Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1818Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1819Rule Regina 1959 only - Oct lastSun 2:00 0 S 1820# 1821Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1822Rule Swift 1957 only - Oct lastSun 2:00 0 S 1823Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1824Rule Swift 1959 only - Oct lastSun 2:00 0 S 1825Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1826# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1827Zone America/Regina -6:58:36 - LMT 1905 Sep 1828 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1829 -6:00 - CST 1830Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1831 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1832 -7:00 Regina M%sT 1950 1833 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1834 -6:00 - CST 1835 1836 1837# Alberta 1838 1839# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1840Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1841Rule Edm 1918 only - Oct 27 2:00 0 S 1842Rule Edm 1919 only - May 27 2:00 0 S 1843Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1844Rule Edm 1920 only - Oct lastSun 2:00 0 S 1845Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1846Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1847Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1848Rule Edm 1945 only - Sep lastSun 2:00 0 S 1849Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1850Rule Edm 1947 only - Sep lastSun 2:00 0 S 1851Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1852Rule Edm 1967 only - Oct lastSun 2:00 0 S 1853Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1854Rule Edm 1969 only - Oct lastSun 2:00 0 S 1855Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1856Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1857# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1858Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1859 -7:00 Edm M%sT 1987 1860 -7:00 Canada M%sT 1861 1862 1863# British Columbia 1864 1865# From Paul Eggert (2006-03-22): 1866# Shanks & Pottenger write that since 1970 most of this region has 1867# been like Vancouver. 1868# Dawson Creek uses MST. Much of east BC is like Edmonton. 1869# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1870 1871# It seems though that (re: Creston) is not entirely correct: 1872 1873# From Chris Walton (2011-12-01): 1874# There are two areas within the Canadian province of British Columbia 1875# that do not currently observe daylight saving: 1876# a) The Creston Valley (includes the town of Creston and surrounding area) 1877# b) The eastern half of the Peace River Regional District 1878# (includes the cities of Dawson Creek and Fort St. John) 1879 1880# Earlier this year I stumbled across a detailed article about the time 1881# keeping history of Creston; it was written by Tammy Hardwick who is the 1882# manager of the Creston & District Museum. The article was written in May 2009. 1883# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1884# According to the article, Creston has not changed its clocks since June 1918. 1885# i.e. Creston has been stuck on UTC-7 for 93 years. 1886# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1887 1888# Unfortunately the exact date for the time change in June 1918 remains 1889# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1890# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1891# as plausible as any other date (in June). She also said that after writing 1892# the article she had discovered another time change in 1916; this is the 1893# subject of another article which she wrote in October 2010. 1894# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1895 1896# Here is a summary of the three clock change events in Creston's history: 1897# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1898# Exact date unknown 1899# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1900# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1901# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1902# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1903# note 1: 1904# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1905# Creston did not change its clocks. 1906# note 2: 1907# During WWII when the Federal Government legislated a mandatory clock change, 1908# Creston did not oblige. 1909# note 3: 1910# There is no guarantee that Creston will remain on Mountain Standard Time 1911# (UTC-7) forever. 1912# The subject was debated at least once this year by the town Council. 1913# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1914 1915# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1916# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1917# summer time to cause the offset to be -7:00, the same as it had been before 1918# the change. It can be argued that the timezone abbreviation during this 1919# period should be PDT rather than MST, but that doesn't seem important enough 1920# (to anyone) to further complicate the rules. 1921 1922# The transition dates (and times) are guesses. 1923 1924# From Matt Johnson (2015-09-21): 1925# Fort Nelson, BC, Canada will cancel DST this year. So while previously they 1926# were aligned with America/Vancouver, they're now aligned with 1927# America/Dawson_Creek. 1928# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 1929# 1930# From Tim Parenti (2015-09-23): 1931# This requires a new zone for the Northern Rockies Regional Municipality, 1932# America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 1933# 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 1934# been on MST (-0700) like Dawson Creek since it advanced its clocks on 1935# 2015-03-08. 1936# 1937# From Paul Eggert (2015-09-23): 1938# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 1939 1940# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1941Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1942Rule Vanc 1918 only - Oct 27 2:00 0 S 1943Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1944Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1945Rule Vanc 1945 only - Sep 30 2:00 0 S 1946Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1947Rule Vanc 1946 only - Oct 13 2:00 0 S 1948Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1949Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1950# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1951Zone America/Vancouver -8:12:28 - LMT 1884 1952 -8:00 Vanc P%sT 1987 1953 -8:00 Canada P%sT 1954Zone America/Dawson_Creek -8:00:56 - LMT 1884 1955 -8:00 Canada P%sT 1947 1956 -8:00 Vanc P%sT 1972 Aug 30 2:00 1957 -7:00 - MST 1958Zone America/Fort_Nelson -8:10:47 - LMT 1884 1959 -8:00 Vanc P%sT 1946 1960 -8:00 - PST 1947 1961 -8:00 Vanc P%sT 1987 1962 -8:00 Canada P%sT 2015 Mar 8 2:00 1963 -7:00 - MST 1964Zone America/Creston -7:46:04 - LMT 1884 1965 -7:00 - MST 1916 Oct 1 1966 -8:00 - PST 1918 Jun 2 1967 -7:00 - MST 1968 1969# Northwest Territories, Nunavut, Yukon 1970 1971# From Paul Eggert (2006-03-22): 1972# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1973# Mathew Englander (1996-10-07) gives the following refs: 1974# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1975# c. 7 defines Yukon standard time as UTC-9.... 1976# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1977# [http://canlii.ca/t/7vhg] 1978# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1979# * O.I.C. 1980/02 established DST. 1980# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1981 1982# From Brian Inglis (2015-04-14): 1983# 1984# I tried to trace the history of Yukon time and found the following 1985# regulations, giving the reference title and URL if found, regulation name, 1986# and relevant quote if available. Each regulation specifically revokes its 1987# predecessor. The final reference is to the current Interpretation Act 1988# authorizing and resulting from these regulatory changes. 1989# 1990# Only recent regulations were retrievable via Yukon government site search or 1991# index, and only some via Canadian legal sources. Other sources used include 1992# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 1993# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 1994# 1970 quoted below; each article includes current extracts from provincial 1995# and territorial ST and DST regulations at the end, summaries and details of 1996# standard times and daylight saving time at many locations across Canada, 1997# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 1998# and LMST; they also cover many countries and global locations, with a chart 1999# and table showing current Universal Time offsets, and may be useful as 2000# another source of information for 1970 and earlier. 2001# 2002# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 2003# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 2004# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 2005# Yukon Interpretation Ordinance 2006# Yukon standard time is the local mean time at the one hundred and 2007# thirty-fifth meridian. 2008# 2009# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 2010# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 2011# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 2012# Yukon Interpretation Ordinance, 1955, Chap. 16. 2013# 2014# (1) Subject to this section, standard time shall be reckoned as nine 2015# hours behind Greenwich Time and called Yukon Standard Time. 2016# 2017# (2) Notwithstanding subsection (1), the Commissioner may make regulations 2018# varying the manner of reckoning standard time. 2019# 2020# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 2021# http://? - no online source found 2022# 2023# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 2024# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 2025# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 2026# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 2027# 2028# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 2029# Territory on 27th January, 1966, is hereby revoked. 2030# 2031# 2. Yukon (East) Standard Time as defined by section 36 of the 2032# Interpretation Ordinance from and after mid-night on the 28th day of May, 2033# 1967 shall be reckoned in the same manner as Pacific Standard Time, that 2034# is to say, eight hours behind Greenwich Time in the area of the Yukon 2035# Territory lying east of the 138th degree longitude west. 2036# 2037# 3. In the remainder of the Territory, lying west of the 138th degree 2038# longitude west, Yukon (West) Standard Time shall be reckoned as nine 2039# hours behind Greenwich Time. 2040# 2041# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 2042# http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 2043# C.O. 1973/214 INTERPRETATION ACT ... 2044# 2045# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 2046# revoked. 2047# 2048# 2. Yukon Standard Time as defined by section 36 of the Interpretation 2049# Act from and after midnight on the twenty-eighth day of October, 1973 2050# shall be reckoned in the same manner as Pacific Standard Time, that is 2051# to say eight hours behind Greenwich Time. 2052# 2053# * O.I.C. 1980/02 INTERPRETATION ACT 2054# http://? - no online source found 2055# 2056# * Yukon Daylight Saving Time, YOIC 1987/56 2057# http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2058# O.I.C. 1987/056 INTERPRETATION ACT ... 2059# 2060# In every year between 2061# (a) two o'clock in the morning in the first Sunday in April, and 2062# (b) two o'clock in the morning in the last Sunday in October, 2063# Standard Time shall be reckoned as seven hours behind Greenwich Time and 2064# called Yukon Daylight Saving Time. 2065# ... 2066# Dated ... 9th day of March, A.D., 1987. 2067# 2068# * Yukon Daylight Saving Time 2006, YOIC 2006/127 2069# http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2070# O.I.C. 2006/127 INTERPRETATION ACT ... 2071# 2072# 1. In Yukon each year the time for general purposes shall be 7 hours 2073# behind Greenwich mean time during the period commencing at two o'clock 2074# in the forenoon on the second Sunday of March and ending at two o'clock 2075# in the forenoon on the first Sunday of November and shall be called 2076# Yukon Daylight Saving Time. 2077# 2078# 2. Order-in-Council 1987/56 is revoked. 2079# 2080# 3. This order comes into force January 1, 2007. 2081# 2082# * Interpretation Act, RSY 2002, c 125 2083# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 2084 2085# From Rives McDow (1999-09-04): 2086# Nunavut ... moved ... to incorporate the whole territory into one time zone. 2087# Nunavut moves to single time zone Oct. 31 2088# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 2089# 2090# From Antoine Leca (1999-09-06): 2091# We then need to create a new timezone for the Kitikmeot region of Nunavut 2092# to differentiate it from the Yellowknife region. 2093 2094# From Paul Eggert (1999-09-20): 2095# Basic Facts: The New Territory 2096# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2097# (1999) reports that Pangnirtung operates on eastern time, 2098# and that Coral Harbour does not observe DST. We don't know when 2099# Pangnirtung switched to eastern time; we'll guess 1995. 2100 2101# From Rives McDow (1999-11-08): 2102# On October 31, when the rest of Nunavut went to Central time, 2103# Pangnirtung wobbled. Here is the result of their wobble: 2104# 2105# The following businesses and organizations in Pangnirtung use Central Time: 2106# 2107# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 2108# Eastern Arctic National Parks, A & D Specialist 2109# 2110# The following businesses and organizations in Pangnirtung use Eastern Time: 2111# 2112# Hamlet office, All other businesses, Both schools, Airport operator 2113# 2114# This has made for an interesting situation there, which warranted the news. 2115# No one there that I spoke with seems concerned, or has plans to 2116# change the local methods of keeping time, as it evidently does not 2117# really interfere with any activities or make things difficult locally. 2118# They plan to celebrate New Year's turn-over twice, one hour apart, 2119# so it appears that the situation will last at least that long. 2120# The Nunavut Intergovernmental Affairs hopes that they will "come to 2121# their senses", but the locals evidently don't see any problem with 2122# the current state of affairs. 2123 2124# From Michaela Rodrigue, writing in the 2125# Nunatsiaq News (1999-11-19): 2126# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 2127# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 2128# central - or Nunavut time - for government offices, and eastern time 2129# for municipal offices and schools.... Igloolik [was similar but then] 2130# made the switch to central time on Saturday, Nov. 6. 2131 2132# From Paul Eggert (2000-10-02): 2133# Matthews and Vincent (1998) say the following, but we lack histories 2134# for these potential new Zones. 2135# 2136# The Canadian Forces station at Alert uses Eastern Time while the 2137# handful of residents at the Eureka weather station [in the Central 2138# zone] skip daylight savings. Baffin Island, which is crossed by the 2139# Central, Eastern and Atlantic Time zones only uses Eastern Time. 2140# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2141# Central Time and Southampton Island [in the Central zone] is not 2142# required to use daylight savings. 2143 2144# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 2145# Nunavut now has two time zones (2000-11-10): 2146# The Nunavut government would allow its employees in Kugluktuk and 2147# Cambridge Bay to operate on central time year-round, putting them 2148# one hour behind the rest of Nunavut for six months during the winter. 2149# At the end of October the two communities had rebelled against 2150# Nunavut's unified time zone, refusing to shift to eastern time with 2151# the rest of the territory for the winter. Cambridge Bay remained on 2152# central time, while Kugluktuk, even farther west, reverted to 2153# mountain time, which they had used before the advent of Nunavut's 2154# unified time zone in 1999. 2155# 2156# From Rives McDow (2001-01-20), quoting the Nunavut government: 2157# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2158 2159# From Paul Eggert (2000-12-04): 2160# Let's just keep track of the official times for now. 2161 2162# From Rives McDow (2001-03-07): 2163# The premier of Nunavut has issued a ministerial statement advising 2164# that effective 2001-04-01, the territory of Nunavut will revert 2165# back to three time zones (mountain, central, and eastern). Of the 2166# cities in Nunavut, Coral Harbor is the only one that I know of that 2167# has said it will not observe dst, staying on EST year round. I'm 2168# checking for more info, and will get back to you if I come up with 2169# more. 2170# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2171 2172# From Gwillim Law (2005-05-21): 2173# According to ... 2174# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2175# (from a 1998 Canadian Geographic article), the de facto and de jure time 2176# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2177# round. Using Google, it's easy to find other websites that confirm this. 2178# I wasn't able to find how far back this time regimen goes, but since it 2179# predates the creation of Nunavut, it probably goes back many years.... 2180# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2181# 2182# From Paul Eggert (2014-10-17): 2183# For lack of better information, assume that Southampton Island observed 2184# daylight saving only during wartime. Gwillim Law's email also 2185# mentioned maps now maintained by National Research Council Canada; 2186# see above for an up-to-date link. 2187 2188# From Chris Walton (2007-03-01): 2189# ... the community of Resolute (located on Cornwallis Island in 2190# Nunavut) moved from Central Time to Eastern Time last November. 2191# Basically the community did not change its clocks at the end of 2192# daylight saving.... 2193# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2194 2195# From Chris Walton (2011-03-21): 2196# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2197# Bay. Resolute Bay is a small community located about 900km north of 2198# the Arctic Circle. The zone file was required because Resolute Bay had 2199# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2200# 2201# According to new information which I received last week, Resolute Bay 2202# went back to using UTC-6 in the winter of 2007-2008... 2203# 2204# On March 11/2007 most of Canada went onto daylight saving. On March 2205# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2206# talked to somebody that was both knowledgeable and helpful. I was able 2207# to confirm that Resolute Bay was still operating on UTC-5. It was 2208# explained to me that Resolute Bay had been on the Eastern Time zone 2209# (EST) in the winter, and was now back on the Central Time zone (CDT). 2210# i.e. the time zone had changed twice in the last year but the clocks 2211# had not moved. The residents had to know which time zone they were in 2212# so they could follow the correct TV schedule... 2213# 2214# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2215# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2216# of the phone call, I decided to seek out an alternate source of 2217# information. I found an e-mail address for somebody by the name of 2218# Stephanie Adams whose job was listed as "Inns North Support Officer for 2219# Arctic Co-operatives." I was under the impression that Stephanie lived 2220# and worked in Resolute Bay... 2221# 2222# On March 14/2011 I phoned the hamlet office again. I was told that 2223# Resolute Bay had been using Central Standard Time over the winter of 2224# 2010-2011 and that the clocks had therefore been moved one hour ahead 2225# on March 13/2011. The person I talked to was aware that Resolute Bay 2226# had previously experimented with Eastern Standard Time but he could not 2227# tell me when the practice had stopped. 2228# 2229# On March 17/2011 I searched the Web to find an e-mail address of 2230# somebody that might be able to tell me exactly when Resolute Bay went 2231# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2232# used to be the mayor of Resolute Bay and he apparently owns half the 2233# businesses including "South Camp Inn." This website has some info on 2234# Aziz: 2235# http://www.uphere.ca/node/493 2236# 2237# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2238# Eastern Standard Time. 2239# 2240# Aziz responded quickly with this: "hi, The time was not changed for the 2241# 1 year only, the following year, the community went back to the old way 2242# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2243# the winter Zulu plus 6 hrs" 2244# 2245# This of course conflicted with everything I had ascertained in November 2008. 2246# 2247# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2248# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2249# may want to check with the weather office in Resolute Bay or do a 2250# search on the weather through Env. Canada. web site" 2251# 2252# If I had realized the Stephanie did not live in Resolute Bay I would 2253# never have contacted her. I now believe that all the information I 2254# obtained in November 2008 should be ignored... 2255# I apologize for reporting incorrect information in 2008. 2256 2257# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2258Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2259Rule NT_YK 1918 only - Oct 27 2:00 0 S 2260Rule NT_YK 1919 only - May 25 2:00 1:00 D 2261Rule NT_YK 1919 only - Nov 1 0:00 0 S 2262Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2263Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2264Rule NT_YK 1945 only - Sep 30 2:00 0 S 2265Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2266Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2267Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2268Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2269Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2270# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2271# aka Panniqtuuq 2272Zone America/Pangnirtung 0 - -00 1921 # trading post est. 2273 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2274 -5:00 Canada E%sT 1999 Oct 31 2:00 2275 -6:00 Canada C%sT 2000 Oct 29 2:00 2276 -5:00 Canada E%sT 2277# formerly Frobisher Bay 2278Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. 2279 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2280 -6:00 Canada C%sT 2000 Oct 29 2:00 2281 -5:00 Canada E%sT 2282# aka Qausuittuq 2283Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded 2284 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2285 -5:00 - EST 2001 Apr 1 3:00 2286 -6:00 Canada C%sT 2006 Oct 29 2:00 2287 -5:00 - EST 2007 Mar 11 3:00 2288 -6:00 Canada C%sT 2289# aka Kangiqiniq 2290Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded 2291 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2292 -5:00 - EST 2001 Apr 1 3:00 2293 -6:00 Canada C%sT 2294# aka Iqaluktuuttiaq 2295Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? 2296 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2297 -6:00 Canada C%sT 2000 Oct 29 2:00 2298 -5:00 - EST 2000 Nov 5 0:00 2299 -6:00 - CST 2001 Apr 1 3:00 2300 -7:00 Canada M%sT 2301Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded? 2302 -7:00 NT_YK M%sT 1980 2303 -7:00 Canada M%sT 2304Zone America/Inuvik 0 - -00 1953 # Inuvik founded 2305 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2306 -7:00 NT_YK M%sT 1980 2307 -7:00 Canada M%sT 2308Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2309 -9:00 NT_YK Y%sT 1967 May 28 0:00 2310 -8:00 NT_YK P%sT 1980 2311 -8:00 Canada P%sT 2312Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2313 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2314 -8:00 NT_YK P%sT 1980 2315 -8:00 Canada P%sT 2316 2317 2318############################################################################### 2319 2320# Mexico 2321 2322# From Paul Eggert (2014-12-07): 2323# The Investigation and Analysis Service of the 2324# Mexican Library of Congress (MLoC) has published a 2325# history of Mexican local time (in Spanish) 2326# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 2327# 2328# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2329# (In all cases we go with the MLoC.) 2330# S&P report that Baja was at -8:00 in 1922/1923. 2331# S&P say the 1930 transition in Baja was 1930-11-16. 2332# S&P report no DST during summer 1931. 2333# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2334 2335# From Gwillim Law (2001-02-20): 2336# There are some other discrepancies between the Decrees page and the 2337# tz database. I think they can best be explained by supposing that 2338# the researchers who prepared the Decrees page failed to find some of 2339# the relevant documents. 2340 2341# From Alan Perry (1996-02-15): 2342# A guy from our Mexico subsidiary finally found the Presidential Decree 2343# outlining the timezone changes in Mexico. 2344# 2345# ------------- Begin Forwarded Message ------------- 2346# 2347# I finally got my hands on the Official Presidential Decree that sets up the 2348# rules for the DST changes. The rules are: 2349# 2350# 1. The country is divided in 3 timezones: 2351# - Baja California Norte (the Mexico/BajaNorte TZ) 2352# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2353# - The rest of the country (the Mexico/General TZ) 2354# 2355# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2356# at 2:00 AM, the times in each zone are as follows: 2357# BajaNorte: GMT+7 2358# BajaSur: GMT+6 2359# General: GMT+5 2360# 2361# 3. The rest of the year, the times are as follows: 2362# BajaNorte: GMT+8 2363# BajaSur: GMT+7 2364# General: GMT+6 2365# 2366# The Decree was published in Mexico's Official Newspaper on January 4th. 2367# 2368# -------------- End Forwarded Message -------------- 2369# From Paul Eggert (1996-06-12): 2370# For an English translation of the decree, see 2371# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2372# http://mexico-travel.com/extra/timezone_eng.html 2373 2374# From Rives McDow (1998-10-08): 2375# The State of Quintana Roo has reverted back to central STD and DST times 2376# (i.e. UTC -0600 and -0500 as of 1998-08-02). 2377 2378# From Rives McDow (2000-01-10): 2379# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2380# zone 5 hours from the International Date Line, and will not observe daylight 2381# savings time so as to stay on the same time zone as the southern part of 2382# Arizona year round. 2383 2384# From Jesper N��rgaard, translating 2385# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2386# In Oaxaca, the 55.000 teachers from the Section 22 of the National 2387# Syndicate of Education Workers, refuse to apply daylight saving each 2388# year, so that the more than 10,000 schools work at normal hour the 2389# whole year. 2390 2391# From Gwillim Law (2001-01-19): 2392# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2393# (translated):... 2394# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2395# that Summer Time will be reduced from seven to five months, starting 2396# this year.... 2397# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2398# [translated], says "summer time will ... take effect on the first Sunday 2399# in May, and end on the last Sunday of September. 2400 2401# From Arthur David Olson (2001-01-25): 2402# The 2001-01-24 traditional Washington Post contained the page one 2403# story "Timely Issue Divides Mexicans."... 2404# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2405# ... Mexico City Mayor L��pez Obrador "...is threatening to keep 2406# Mexico City and its 20 million residents on a different time than 2407# the rest of the country..." In particular, L��pez Obrador would abolish 2408# observation of Daylight Saving Time. 2409 2410# Official statute published by the Energy Department 2411# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2412# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2413# and Sonora with no DST. This was reported by Jesper N��rgaard (2001-02-03). 2414 2415# From Paul Eggert (2001-03-03): 2416# 2417# http://www.latimes.com/news/nation/20010303/t000018766.html 2418# James F. Smith writes in today's LA Times 2419# * Sonora will continue to observe standard time. 2420# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that 2421# the Federal District will not adopt DST. 2422# * 4 of 16 district leaders announced they'll ignore the decree. 2423# * The decree does not affect federal-controlled facilities including 2424# the airport, banks, hospitals, and schools. 2425# 2426# For now we'll assume that the Federal District will bow to federal rules. 2427 2428# From Jesper N��rgaard (2001-04-01): 2429# I found some references to the Mexican application of daylight 2430# saving, which modifies what I had already sent you, stating earlier 2431# that a number of northern Mexican states would go on daylight 2432# saving. The modification reverts this to only cover Baja California 2433# (Norte), while all other states (except Sonora, who has no daylight 2434# saving all year) will follow the original decree of president 2435# Vicente Fox, starting daylight saving May 6, 2001 and ending 2436# September 30, 2001. 2437# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2438# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2439 2440# From Reuters (2001-09-04): 2441# Mexico's Supreme Court on Tuesday declared that daylight savings was 2442# unconstitutional in Mexico City, creating the possibility the 2443# capital will be in a different time zone from the rest of the nation 2444# next year.... The Supreme Court's ruling takes effect at 2:00 2445# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2446# standard time. "This is so residents of the Federal District are not 2447# subject to unexpected time changes," a statement from the court said. 2448 2449# From Jesper N��rgaard Welen (2002-03-12): 2450# ... consulting my local grocery store(!) and my coworkers, they all insisted 2451# that a new decision had been made to reinstate US style DST in Mexico.... 2452# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2453# confirms this. Sonora as usual is the only state where DST is not applied. 2454 2455# From Steffen Thorsen (2009-12-28): 2456# 2457# Steffen Thorsen wrote: 2458# > Mexico's House of Representatives has approved a proposal for northern 2459# > Mexico's border cities to share the same daylight saving schedule as 2460# > the United States. 2461# Now this has passed both the Congress and the Senate, so starting from 2462# 2010, some border regions will be the same: 2463# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2464# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2465# (Spanish) 2466# 2467# Could not find the new law text, but the proposed law text changes are here: 2468# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2469# (Gaceta Parlamentaria) 2470# 2471# There is also a list of the votes here: 2472# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2473# 2474# Our page: 2475# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2476 2477# From Arthur David Olson (2010-01-20): 2478# The page 2479# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2480# includes this text: 2481# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2482# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila; 2483# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en 2484# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto 2485# desde las dos horas del segundo domingo de marzo y concluir�� a las dos 2486# horas del primer domingo de noviembre. 2487# En los municipios fronterizos que se encuentren ubicados en la franja 2488# fronteriza norte en el territorio comprendido entre la l��nea 2489# internacional y la l��nea paralela ubicada a una distancia de veinte 2490# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el 2491# interior del pa��s, la aplicaci��n de este horario estacional surtir�� 2492# efecto desde las dos horas del segundo domingo de marzo y concluir�� a 2493# las dos horas del primer domingo de noviembre. 2494 2495# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2496# The Mexican state of Quintana Roo will likely change to EST in 2015. 2497# 2498# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2499# "With this change, the time conflict that has existed between the municipios 2500# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2501# end. The latter declared itself in rebellion 15 years ago when a time change 2502# was initiated in Mexico, and since then it has refused to change its time 2503# zone along with the rest of the country." 2504# 2505# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2506# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2507# "...the new time zone will come into effect at two o'clock on the first Sunday 2508# of February, when we will have to advance the clock one hour from its current 2509# time..." 2510# Also, the new zone will not use DST. 2511# 2512# From Carlos Ra��l Perasso (2015-02-02): 2513# The decree that modifies the Mexican Hour System Law has finally 2514# been published at the Diario Oficial de la Federaci��n 2515# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2516# It establishes 5 zones for Mexico: 2517# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2518# includes most of Mexico, excluding what's mentioned below. 2519# 2- Zona Pac��fico (Pacific Zone): Longitude 105 W, includes the 2520# states of Baja California Sur; Chihuahua; Nayarit (excluding Bah��a 2521# de Banderas which lies in Central Zone); Sinaloa and Sonora. 2522# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2523# state of Baja California. 2524# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2525# of Quintana Roo. 2526# 5- The islands, reefs and keys shall take their timezone from the 2527# longitude they are located at. 2528 2529# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2530Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2531Rule Mexico 1939 only - Jun 25 0:00 0 S 2532Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2533Rule Mexico 1941 only - Apr 1 0:00 0 S 2534Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2535Rule Mexico 1944 only - May 1 0:00 0 S 2536Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2537Rule Mexico 1950 only - Jul 30 0:00 0 S 2538Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2539Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2540Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2541Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2542Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2543Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2544# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2545# Quintana Roo; represented by Canc��n 2546Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2547 -6:00 - CST 1981 Dec 23 2548 -5:00 Mexico E%sT 1998 Aug 2 2:00 2549 -6:00 Mexico C%sT 2015 Feb 1 2:00 2550 -5:00 - EST 2551# Campeche, Yucat��n; represented by M��rida 2552Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2553 -6:00 - CST 1981 Dec 23 2554 -5:00 - EST 1982 Dec 2 2555 -6:00 Mexico C%sT 2556# Coahuila, Nuevo Le��n, Tamaulipas (near US border) 2557# This includes the following municipalities: 2558# in Coahuila: Ocampo, Acu��a, Zaragoza, Jim��nez, Piedras Negras, Nava, 2559# Guerrero, Hidalgo. 2560# in Nuevo Le��n: An��huac, Los Aldama. 2561# in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alem��n, Camargo, 2562# Gustavo D��az Ordaz, Reynosa, R��o Bravo, Valle Hermoso, Matamoros. 2563# See: Inicia ma��ana Horario de Verano en zona fronteriza, El Universal, 2564# 2016-03-12 2565# http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza 2566Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2567 -6:00 - CST 1988 2568 -6:00 US C%sT 1989 2569 -6:00 Mexico C%sT 2010 2570 -6:00 US C%sT 2571# Durango; Coahuila, Nuevo Le��n, Tamaulipas (away from US border) 2572Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2573 -6:00 - CST 1988 2574 -6:00 US C%sT 1989 2575 -6:00 Mexico C%sT 2576# Central Mexico 2577Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2578 -7:00 - MST 1927 Jun 10 23:00 2579 -6:00 - CST 1930 Nov 15 2580 -7:00 - MST 1931 May 1 23:00 2581 -6:00 - CST 1931 Oct 2582 -7:00 - MST 1932 Apr 1 2583 -6:00 Mexico C%sT 2001 Sep 30 2:00 2584 -6:00 - CST 2002 Feb 20 2585 -6:00 Mexico C%sT 2586# Chihuahua (near US border) 2587# This includes the municipalities of Janos, Ascensi��n, Ju��rez, Guadalupe, 2588# Pr��xedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. 2589# (See the 2016-03-12 El Universal source mentioned above.) 2590Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2591 -7:00 - MST 1927 Jun 10 23:00 2592 -6:00 - CST 1930 Nov 15 2593 -7:00 - MST 1931 May 1 23:00 2594 -6:00 - CST 1931 Oct 2595 -7:00 - MST 1932 Apr 1 2596 -6:00 - CST 1996 2597 -6:00 Mexico C%sT 1998 2598 -6:00 - CST 1998 Apr Sun>=1 3:00 2599 -7:00 Mexico M%sT 2010 2600 -7:00 US M%sT 2601# Chihuahua (away from US border) 2602Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2603 -7:00 - MST 1927 Jun 10 23:00 2604 -6:00 - CST 1930 Nov 15 2605 -7:00 - MST 1931 May 1 23:00 2606 -6:00 - CST 1931 Oct 2607 -7:00 - MST 1932 Apr 1 2608 -6:00 - CST 1996 2609 -6:00 Mexico C%sT 1998 2610 -6:00 - CST 1998 Apr Sun>=1 3:00 2611 -7:00 Mexico M%sT 2612# Sonora 2613Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2614 -7:00 - MST 1927 Jun 10 23:00 2615 -6:00 - CST 1930 Nov 15 2616 -7:00 - MST 1931 May 1 23:00 2617 -6:00 - CST 1931 Oct 2618 -7:00 - MST 1932 Apr 1 2619 -6:00 - CST 1942 Apr 24 2620 -7:00 - MST 1949 Jan 14 2621 -8:00 - PST 1970 2622 -7:00 Mexico M%sT 1999 2623 -7:00 - MST 2624 2625# From Alexander Krivenyshev (2010-04-21): 2626# According to news, Bah��a de Banderas (Mexican state of Nayarit) 2627# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2628# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2629# 2630# (Spanish) 2631# Bah��a de Banderas homologa su horario al del centro del 2632# pa��s, a partir de este domingo 2633# http://www.nayarit.gob.mx/notes.asp?id=20748 2634# 2635# Bah��a de Banderas homologa su horario con el del Centro del 2636# Pa��s 2637# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 2638# 2639# (English) 2640# Puerto Vallarta and Bah��a de Banderas: One Time Zone 2641# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2642# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2643# 2644# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2645# will allow Bah��a de Banderas and Puerto Vallarta to share the same time 2646# zone ..." 2647# Baja California Sur, Nayarit, Sinaloa 2648 2649# From Arthur David Olson (2010-05-01): 2650# Use "Bahia_Banderas" to keep the name to fourteen characters. 2651 2652# Mazatl��n 2653Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2654 -7:00 - MST 1927 Jun 10 23:00 2655 -6:00 - CST 1930 Nov 15 2656 -7:00 - MST 1931 May 1 23:00 2657 -6:00 - CST 1931 Oct 2658 -7:00 - MST 1932 Apr 1 2659 -6:00 - CST 1942 Apr 24 2660 -7:00 - MST 1949 Jan 14 2661 -8:00 - PST 1970 2662 -7:00 Mexico M%sT 2663 2664# Bah��a de Banderas 2665Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2666 -7:00 - MST 1927 Jun 10 23:00 2667 -6:00 - CST 1930 Nov 15 2668 -7:00 - MST 1931 May 1 23:00 2669 -6:00 - CST 1931 Oct 2670 -7:00 - MST 1932 Apr 1 2671 -6:00 - CST 1942 Apr 24 2672 -7:00 - MST 1949 Jan 14 2673 -8:00 - PST 1970 2674 -7:00 Mexico M%sT 2010 Apr 4 2:00 2675 -6:00 Mexico C%sT 2676 2677# Baja California 2678Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2679 -7:00 - MST 1924 2680 -8:00 - PST 1927 Jun 10 23:00 2681 -7:00 - MST 1930 Nov 15 2682 -8:00 - PST 1931 Apr 1 2683 -8:00 1:00 PDT 1931 Sep 30 2684 -8:00 - PST 1942 Apr 24 2685 -8:00 1:00 PWT 1945 Aug 14 23:00u 2686 -8:00 1:00 PPT 1945 Nov 12 # Peace 2687 -8:00 - PST 1948 Apr 5 2688 -8:00 1:00 PDT 1949 Jan 14 2689 -8:00 - PST 1954 2690 -8:00 CA P%sT 1961 2691 -8:00 - PST 1976 2692 -8:00 US P%sT 1996 2693 -8:00 Mexico P%sT 2001 2694 -8:00 US P%sT 2002 Feb 20 2695 -8:00 Mexico P%sT 2010 2696 -8:00 US P%sT 2697# From Paul Eggert (2006-03-22): 2698# Formerly there was an America/Ensenada zone, which differed from 2699# America/Tijuana only in that it did not observe DST from 1976 2700# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2701# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2702# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2703# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2704# DST-observance was a town-by-town matter back then. This concerns 2705# data after 1970 so most likely there should be at least one Zone 2706# other than America/Tijuana for Baja, but it's not clear yet what its 2707# name or contents should be. 2708# 2709# From Paul Eggert (2015-10-08): 2710# Formerly there was an America/Santa_Isabel zone, but this appears to 2711# have come from a misreading of 2712# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2713# It has been moved to the 'backward' file. 2714# 2715# 2716# Revillagigedo Is 2717# no information 2718 2719############################################################################### 2720 2721# Anguilla 2722# Antigua and Barbuda 2723# See America/Port_of_Spain. 2724 2725# Bahamas 2726# 2727# For 1899 Milne gives -5:09:29.5; round that. 2728# 2729# From Sue Williams (2006-12-07): 2730# The Bahamas announced about a month ago that they plan to change their DST 2731# rules to sync with the U.S. starting in 2007.... 2732# http://www.jonesbahamas.com/?c=45&a=10412 2733 2734# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2735Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2736Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2737# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2738Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2739 -5:00 Bahamas E%sT 1976 2740 -5:00 US E%sT 2741 2742# Barbados 2743 2744# For 1899 Milne gives -3:58:29.2; round that. 2745 2746# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2747Rule Barb 1977 only - Jun 12 2:00 1:00 D 2748Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2749Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2750Rule Barb 1979 only - Sep 30 2:00 0 S 2751Rule Barb 1980 only - Sep 25 2:00 0 S 2752# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2753Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2754 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2755 -4:00 Barb A%sT 2756 2757# Belize 2758# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2759# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2760Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2761Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2762Rule Belize 1973 only - Dec 5 0:00 1:00 D 2763Rule Belize 1974 only - Feb 9 0:00 0 S 2764Rule Belize 1982 only - Dec 18 0:00 1:00 D 2765Rule Belize 1983 only - Feb 12 0:00 0 S 2766# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2767Zone America/Belize -5:52:48 - LMT 1912 Apr 2768 -6:00 Belize C%sT 2769 2770# Bermuda 2771 2772# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2773# Bermuda dockyard, Ireland I; round that. 2774 2775# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2776 2777# Next year, however, clocks in the US will go forward on the second Sunday 2778# in March, until the first Sunday in November. And, after the Time Zone 2779# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2780# Friday, the same thing will happen in Bermuda. 2781# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2782 2783# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2784Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2785 -4:00 - AST 1974 Apr 28 2:00 2786 -4:00 Canada A%sT 1976 2787 -4:00 US A%sT 2788 2789# Cayman Is 2790# See America/Panama. 2791 2792# Costa Rica 2793 2794# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2795 2796# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2797Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2798Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2799Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2800# IATA SSIM (1991-09) says the following was at 1:00; 2801# go with Shanks & Pottenger. 2802Rule CR 1991 only - Jul 1 0:00 0 S 2803Rule CR 1992 only - Mar 15 0:00 0 S 2804# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'. 2805# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2806Zone America/Costa_Rica -5:36:13 - LMT 1890 # San Jos�� 2807 -5:36:13 - SJMT 1921 Jan 15 # San Jos�� Mean Time 2808 -6:00 CR C%sT 2809# Coco 2810# no information; probably like America/Costa_Rica 2811 2812# Cuba 2813 2814# From Paul Eggert (2013-02-21): 2815# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2816# for the port, and -5:30 for meteorological observations. 2817# For now, stick with Shanks & Pottenger. 2818 2819# From Arthur David Olson (1999-03-29): 2820# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2821# the Cuban National Team and the Baltimore Orioles was carried live on 2822# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2823# During the game, play-by-play announcer Jim Hunter noted that 2824# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2825# Time today." (The "two hour" remark referred to losing one hour of 2826# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2827# to DST - and one more hour on 1999-04-04 - when the announcers will have 2828# returned to Baltimore, which switches on that date.) 2829 2830# From Steffen Thorsen (2013-11-11): 2831# DST start in Cuba in 2004 ... does not follow the same rules as the 2832# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2833# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2834 2835# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2836# Cuba is not going back to standard time this year. 2837# From Paul Eggert (2006-03-22): 2838# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2839# says that it's due to a problem at the Antonio Guiteras 2840# thermoelectric plant, and says "This October there will be no return 2841# to normal hours (after daylight saving time)". 2842# For now, let's assume that it's a temporary measure. 2843 2844# From Carlos A. Carnero Delgado (2005-11-12): 2845# This year (just like in 2004-2005) there's no change in time zone 2846# adjustment in Cuba. We will stay in daylight saving time: 2847# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2848 2849# From Jesper N��rgaard Welen (2006-10-21): 2850# An article in GRANMA INTERNACIONAL claims that Cuba will end 2851# the 3 years of permanent DST next weekend, see 2852# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2853# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2854# watches should be set back one hour - going back to 00:00 hours - returning 2855# to the normal schedule.... 2856 2857# From Paul Eggert (2007-03-02): 2858# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2859# says Cuban clocks will advance at midnight on March 10. 2860# For lack of better information, assume Cuba will use US rules, 2861# except that it switches at midnight standard time as usual. 2862# 2863# From Steffen Thorsen (2007-10-25): 2864# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2865# earlier - on the last Sunday of October, just like in 2006. 2866# 2867# He supplied these references: 2868# 2869# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2870# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2871# 2872# From Alex Krivenyshev (2007-10-25): 2873# Here is also article from Granma (Cuba): 2874# 2875# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre 2876# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2877# 2878# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2879 2880# From Arthur David Olson (2008-03-09): 2881# I'm in Maryland which is now observing United States Eastern Daylight 2882# Time. At 9:44 local time I used RealPlayer to listen to 2883# http://media.enet.cu/radioreloj 2884# a Cuban information station, and heard 2885# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2886# indicating that Cuba is still on standard time. 2887 2888# From Steffen Thorsen (2008-03-12): 2889# It seems that Cuba will start DST on Sunday, 2007-03-16... 2890# It was announced yesterday, according to this source (in Spanish): 2891# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2892# 2893# Some more background information is posted here: 2894# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2895# 2896# The article also says that Cuba has been observing DST since 1963, 2897# while Shanks (and tzdata) has 1965 as the first date (except in the 2898# 1940's). Many other web pages in Cuba also claim that it has been 2899# observed since 1963, but with the exception of 1970 - an exception 2900# which is not present in tzdata/Shanks. So there is a chance we need to 2901# change some historic records as well. 2902# 2903# One example: 2904# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2905 2906# From Jesper N��rgaard Welen (2008-03-13): 2907# The Cuban time change has just been confirmed on the most authoritative 2908# web site, the Granma. Please check out 2909# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2910# 2911# Basically as expected after Steffen Thorsen's information, the change 2912# will take place midnight between Saturday and Sunday. 2913 2914# From Arthur David Olson (2008-03-12): 2915# Assume Sun>=15 (third Sunday) going forward. 2916 2917# From Alexander Krivenyshev (2009-03-04) 2918# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2919# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2920# not on midnight March 14 / March 15 as previously thought. 2921# 2922# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2923# (in Spanish) 2924 2925# From Arthur David Olson (2009-03-09) 2926# I listened over the Internet to 2927# http://media.enet.cu/readioreloj 2928# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2929# the time was announced as "diez cinco" - the same time as here, indicating 2930# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2931 2932# From Steffen Thorsen (2011-03-08): 2933# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2934# this year. Nothing about the end date known so far (if that has 2935# changed at all). 2936# 2937# Source: 2938# http://granma.co.cu/2011/03/08/nacional/artic01.html 2939# 2940# Our info: 2941# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2942# 2943# From Steffen Thorsen (2011-10-30) 2944# Cuba will end DST two weeks later this year. Instead of going back 2945# tonight, it has been delayed to 2011-11-13 at 01:00. 2946# 2947# One source (Spanish) 2948# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2949# 2950# Our page: 2951# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2952# 2953# From Steffen Thorsen (2012-03-01) 2954# According to Radio Reloj, Cuba will start DST on Midnight between March 2955# 31 and April 1. 2956# 2957# Radio Reloj has the following info (Spanish): 2958# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2959# 2960# Our info on it: 2961# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2962 2963# From Steffen Thorsen (2012-11-03): 2964# Radio Reloj and many other sources report that Cuba is changing back 2965# to standard time on 2012-11-04: 2966# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2967# From Paul Eggert (2012-11-03): 2968# For now, assume the future rule is first Sunday in November. 2969 2970# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2971Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2972Rule Cuba 1928 only - Oct 10 0:00 0 S 2973Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2974Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2975Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2976Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2977Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2978Rule Cuba 1965 only - Sep 30 0:00 0 S 2979Rule Cuba 1966 only - May 29 0:00 1:00 D 2980Rule Cuba 1966 only - Oct 2 0:00 0 S 2981Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2982Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2983Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2984Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2985Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2986Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2987Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2988Rule Cuba 1978 only - May 7 0:00 1:00 D 2989Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2990Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2991Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2992Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2993Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2994Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2995Rule Cuba 1996 only - Oct 6 0:00s 0 S 2996Rule Cuba 1997 only - Oct 12 0:00s 0 S 2997Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2998Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2999Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 3000Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 3001Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 3002Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 3003Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 3004Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 3005Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 3006Rule Cuba 2011 only - Nov 13 0:00s 0 S 3007Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 3008Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 3009Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 3010 3011# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3012Zone America/Havana -5:29:28 - LMT 1890 3013 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 3014 -5:00 Cuba C%sT 3015 3016# Dominica 3017# See America/Port_of_Spain. 3018 3019# Dominican Republic 3020 3021# From Steffen Thorsen (2000-10-30): 3022# Enrique Morales reported to me that the Dominican Republic has changed the 3023# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 3024# http://www.listin.com.do/antes/261000/republica/princi.html 3025 3026# From Paul Eggert (2000-12-04): 3027# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 3028 3029# From Rives McDow (2000-12-01): 3030# Dominican Republic changed its mind and presidential decree on Tuesday, 3031# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 3032# Dominican Republic will be reverting to 8 hours from the International Date 3033# Line, and will not be using DST in the foreseeable future. The reason they 3034# decided to use DST was to be in synch with Puerto Rico, who was also going 3035# to implement DST. When Puerto Rico didn't implement DST, the president 3036# decided to revert. 3037 3038 3039# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3040Rule DR 1966 only - Oct 30 0:00 1:00 D 3041Rule DR 1967 only - Feb 28 0:00 0 S 3042Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 3043Rule DR 1970 only - Feb 21 0:00 0 S 3044Rule DR 1971 only - Jan 20 0:00 0 S 3045Rule DR 1972 1974 - Jan 21 0:00 0 S 3046# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3047Zone America/Santo_Domingo -4:39:36 - LMT 1890 3048 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 3049 -5:00 DR E%sT 1974 Oct 27 3050 -4:00 - AST 2000 Oct 29 2:00 3051 -5:00 US E%sT 2000 Dec 3 1:00 3052 -4:00 - AST 3053 3054# El Salvador 3055 3056# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3057Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 3058Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 3059# There are too many San Salvadors elsewhere, so use America/El_Salvador 3060# instead of America/San_Salvador. 3061# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3062Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 3063 -6:00 Salv C%sT 3064 3065# Grenada 3066# Guadeloupe 3067# St Barth��lemy 3068# St Martin (French part) 3069# See America/Port_of_Spain. 3070 3071# Guatemala 3072# 3073# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 3074# Diario Co Latino, at 3075# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 3076# says in an article dated 2006-04-19 that the Guatemalan government had 3077# decided on that date to advance official time by 60 minutes, to lessen the 3078# impact of the elevated cost of oil.... Daylight saving time will last from 3079# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 3080# From Paul Eggert (2006-06-22): 3081# The Ministry of Energy and Mines, press release CP-15/2006 3082# (2006-04-19), says DST ends at 24:00. See 3083# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3084 3085# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3086Rule Guat 1973 only - Nov 25 0:00 1:00 D 3087Rule Guat 1974 only - Feb 24 0:00 0 S 3088Rule Guat 1983 only - May 21 0:00 1:00 D 3089Rule Guat 1983 only - Sep 22 0:00 0 S 3090Rule Guat 1991 only - Mar 23 0:00 1:00 D 3091Rule Guat 1991 only - Sep 7 0:00 0 S 3092Rule Guat 2006 only - Apr 30 0:00 1:00 D 3093Rule Guat 2006 only - Oct 1 0:00 0 S 3094# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3095Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 3096 -6:00 Guat C%sT 3097 3098# Haiti 3099# From Gwillim Law (2005-04-15): 3100# Risto O. Nyk��nen wrote me that Haiti is now on DST. 3101# I searched for confirmation, and I found a press release 3102# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3103# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3104# 3105# "The Prime Minister's Communication Office notifies the public in general 3106# and the press in particular that, following a decision of the Interior 3107# Ministry and the Territorial Collectivities [I suppose that means the 3108# provinces], Haiti will move to Eastern Daylight Time in the night from next 3109# Saturday the 2nd to Sunday the 3rd. 3110# 3111# "Consequently, the Prime Minister's Communication Office wishes to inform 3112# the population that the country's clocks will be set forward one hour 3113# starting at midnight. This provision will hold until the last Saturday in 3114# October 2005. 3115# 3116# "Port-au-Prince, March 31, 2005" 3117# 3118# From Steffen Thorsen (2006-04-04): 3119# I have been informed by users that Haiti observes DST this year like 3120# last year, so the current "only" rule for 2005 might be changed to a 3121# "max" rule or to last until 2006. (Who knows if they will observe DST 3122# next year or if they will extend their DST like US/Canada next year). 3123# 3124# I have found this article about it (in French): 3125# http://www.haitipressnetwork.com/news.cfm?articleID=7612 3126# 3127# The reason seems to be an energy crisis. 3128 3129# From Stephen Colebourne (2007-02-22): 3130# Some IATA info: Haiti won't be having DST in 2007. 3131 3132# From Steffen Thorsen (2012-03-11): 3133# According to several news sources, Haiti will observe DST this year, 3134# apparently using the same start and end date as USA/Canada. 3135# So this means they have already changed their time. 3136# 3137# http://www.alterpresse.org/spip.php?article12510 3138# http://radiovision2000haiti.net/home/?p=13253 3139# 3140# From Arthur David Olson (2012-03-11): 3141# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3142# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3143# Assume a US-style fall back as well. 3144 3145# From Steffen Thorsen (2013-03-10): 3146# It appears that Haiti is observing DST this year as well, same rules 3147# as US/Canada. They did it last year as well, and it looks like they 3148# are going to observe DST every year now... 3149# 3150# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3151# http://www.canalplushaiti.net/?p=6714 3152 3153# From Steffen Thorsen (2016-03-12): 3154# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 3155# are not going on DST this year. Several other resources confirm this: ... 3156# http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 3157# http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 3158# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 3159 3160# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3161Rule Haiti 1983 only - May 8 0:00 1:00 D 3162Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3163Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3164# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3165# Go with IATA. 3166Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3167Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3168Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3169Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3170Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 3171Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S 3172# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3173Zone America/Port-au-Prince -4:49:20 - LMT 1890 3174 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3175 -5:00 Haiti E%sT 3176 3177# Honduras 3178# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3179 3180# From Paul Eggert (2006-05-05): 3181# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3182# saying Honduras will start using DST midnight Saturday, effective 4 3183# months until September. La Tribuna reported today 3184# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3185# of Honduras, refused to back down on this. 3186 3187# From Jesper N��rgaard Welen (2006-08-08): 3188# It seems that Honduras has returned from DST to standard time this Monday at 3189# 00:00 hours (prolonging Sunday to 25 hours duration). 3190# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3191 3192# From Paul Eggert (2006-08-08): 3193# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3194# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3195# It mentions executive decree 18-2006. 3196 3197# From Steffen Thorsen (2006-08-17): 3198# Honduras will observe DST from 2007 to 2009, exact dates are not 3199# published, I have located this authoritative source: 3200# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3201 3202# From Steffen Thorsen (2007-03-30): 3203# http://www.laprensahn.com/pais_nota.php?id04962=7386 3204# So it seems that Honduras will not enter DST this year.... 3205 3206# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3207Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3208Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3209Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3210Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3211# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3212Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3213 -6:00 Hond C%sT 3214# 3215# Great Swan I ceded by US to Honduras in 1972 3216 3217# Jamaica 3218# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3219# unspecified official document, and says "This time is used throughout the 3220# island". Go with Milne. Round to the nearest second as required by zic. 3221# 3222# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3223# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3224# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3225# Manley's supporters associated this act with Manley's nickname "Joshua" 3226# (recall that in the Bible the sun stood still at Joshua's request), 3227# and with the Rod of Correction which Manley said he had received from 3228# Haile Selassie, Emperor of Ethiopia. See: 3229# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3230# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3231# 3232# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3233Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3234 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3235 -5:00 - EST 1974 3236 -5:00 US E%sT 1984 3237 -5:00 - EST 3238 3239# Martinique 3240# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3241Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3242 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3243 -4:00 - AST 1980 Apr 6 3244 -4:00 1:00 ADT 1980 Sep 28 3245 -4:00 - AST 3246 3247# Montserrat 3248# See America/Port_of_Spain. 3249 3250# Nicaragua 3251# 3252# This uses Shanks & Pottenger for times before 2005. 3253# 3254# From Steffen Thorsen (2005-04-12): 3255# I've got reports from 8 different people that Nicaragua just started 3256# DST on Sunday 2005-04-10, in order to save energy because of 3257# expensive petroleum. The exact end date for DST is not yet 3258# announced, only "September" but some sites also say "mid-September". 3259# Some background information is available on the President's official site: 3260# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3261# The Decree, no 23-2005 is available here: 3262# 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 3263# 3264# From Paul Eggert (2005-05-01): 3265# The decree doesn't say anything about daylight saving, but for now let's 3266# assume that it is daylight saving.... 3267# 3268# From Gwillim Law (2005-04-21): 3269# The Associated Press story on the time change, which can be found at 3270# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3271# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3272# time that a change of clocks was applied to save energy was in the year 2000 3273# during the Arnoldo Alem��n administration."... 3274# The northamerica file says that Nicaragua has been on UTC-6 continuously 3275# since December 1998. I wasn't able to find any details of Nicaraguan time 3276# changes in 2000. Perhaps a note could be added to the northamerica file, to 3277# the effect that we have indirect evidence that DST was observed in 2000. 3278# 3279# From Jesper N��rgaard Welen (2005-11-02): 3280# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3281# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3282# (2005-09-26) 3283# 3284# From Jesper N��rgaard Welen (2006-05-05): 3285# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3286# (my informal translation) 3287# By order of the president of the republic, Enrique Bola��os, Nicaragua 3288# advanced by sixty minutes their official time, yesterday at 2 in the 3289# morning, and will stay that way until 30th of September. 3290# 3291# From Jesper N��rgaard Welen (2006-09-30): 3292# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3293# My informal translation runs: 3294# The natural sun time is restored in all the national territory, in that the 3295# time is returned one hour at 01:00 am of October 1 of 2006. 3296# 3297# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3298Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3299Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3300Rule Nic 2005 only - Apr 10 0:00 1:00 D 3301Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3302Rule Nic 2006 only - Apr 30 2:00 1:00 D 3303Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3304# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3305Zone America/Managua -5:45:08 - LMT 1890 3306 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3307 -6:00 - CST 1973 May 3308 -5:00 - EST 1975 Feb 16 3309 -6:00 Nic C%sT 1992 Jan 1 4:00 3310 -5:00 - EST 1992 Sep 24 3311 -6:00 - CST 1993 3312 -5:00 - EST 1997 3313 -6:00 Nic C%sT 3314 3315# Panama 3316# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3317Zone America/Panama -5:18:08 - LMT 1890 3318 -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 3319 -5:00 - EST 3320Link America/Panama America/Cayman 3321 3322# Puerto Rico 3323# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3324# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3325Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3326 -4:00 - AST 1942 May 3 3327 -4:00 US A%sT 1946 3328 -4:00 - AST 3329 3330# St Kitts-Nevis 3331# St Lucia 3332# See America/Port_of_Spain. 3333 3334# St Pierre and Miquelon 3335# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3336# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3337Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3338 -4:00 - AST 1980 May 3339 -3:00 - PMST 1987 # Pierre & Miquelon Time 3340 -3:00 Canada PM%sT 3341 3342# St Vincent and the Grenadines 3343# See America/Port_of_Spain. 3344 3345# Turks and Caicos 3346# 3347# From Chris Dunn in 3348# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3349# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3350# daylight saving dates for time changes have been adjusted to match 3351# the recent U.S. change of dates. 3352# 3353# From Brian Inglis (2007-04-28): 3354# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3355# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3356# rows before that there is an out of date entry for Oct: 3357# "Eastern Standard Times Begins 2007 3358# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3359# indicating that the normal ET rules are followed. 3360# 3361# From Paul Eggert (2014-08-19): 3362# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: 3363# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3364# Model this as a switch from EST/EDT to AST ... 3365# From Chris Walton (2014-11-04): 3366# ... the TCI government appears to have delayed the switch to 3367# "permanent daylight saving time" by one year.... 3368# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3369# 3370# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3371Zone America/Grand_Turk -4:44:32 - LMT 1890 3372 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3373 -5:00 - EST 1979 3374 -5:00 US E%sT 2015 Nov Sun>=1 2:00 3375 -4:00 - AST 3376 3377# British Virgin Is 3378# Virgin Is 3379# See America/Port_of_Spain. 3380 3381 3382# Local Variables: 3383# coding: utf-8 3384# End: 3385