northamerica revision 219687
1153761Swollman# <pre> 2219687Sedwin# @(#)northamerica 8.42 3192886Sedwin# This file is in the public domain, so clarified as of 4192886Sedwin# 2009-05-17 by Arthur David Olson. 5153761Swollman 62742Swollman# also includes Central America and the Caribbean 72742Swollman 82742Swollman# This data is by no means authoritative; if you think you know better, 92742Swollman# go ahead and edit the file (and please send any changes to 102742Swollman# tz@elsie.nci.nih.gov for general use in the future). 112742Swollman 12149514Swollman# From Paul Eggert (1999-03-22): 132742Swollman# A reliable and entertaining source about time zones is 1458787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 152742Swollman 162742Swollman############################################################################### 172742Swollman 182742Swollman# United States 192742Swollman 2058787Sru# From Paul Eggert (1999-03-31): 2158787Sru# Howse writes (pp 121-125) that time zones were invented by 2258787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2358787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 2458787Sru# His pamphlet ``A System of National Time for Railroads'' (1870) 2558787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2658787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2758787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2858787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2958787Sru# and the most of the country soon followed suit. 3058787Sru 31149514Swollman# From Paul Eggert (2005-04-16): 32149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 33149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 34149514Swollman 35158421Swollman# From Paul Eggert (2006-03-22): 3614343Swollman# A good source for time zone historical data in the US is 3714343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3814343Swollman# San Diego: ACS Publications, Inc. (1991). 3914343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 40158421Swollman# It is the source for most of the pre-1991 US entries below. 4114343Swollman 4275267Swollman# From Paul Eggert (2001-03-06): 4317200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 4475267Swollman# in his whimsical essay ``An Economical Project for Diminishing the Cost 4575267Swollman# of Light'' published in the Journal de Paris (1784-04-26). 4617200Swollman# Not everyone is happy with the results: 4717200Swollman# 4817200Swollman# I don't really care how time is reckoned so long as there is some 4917200Swollman# agreement about it, but I object to being told that I am saving 5017200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 5117200Swollman# I even object to the implication that I am wasting something 5217200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 5317200Swollman# of moonlight I resent the bossy insistence of those who want to 5417200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 5517200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 5617200Swollman# to push people into bed earlier, and get them up earlier, to make 5717200Swollman# them healthy, wealthy and wise in spite of themselves. 5817200Swollman# 59149514Swollman# -- Robertson Davies, The diary of Samuel Marchbanks, 60149514Swollman# Clarke, Irwin (1947), XIX, Sunday 6175267Swollman# 6275267Swollman# For more about the first ten years of DST in the United States, see 6375267Swollman# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 6475267Swollman# Ten years of daylight saving from the Pittsburgh standpoint 6575267Swollman# (Carnegie Library of Pittsburgh, 1927)</a>. 6675267Swollman# 6775267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 6875267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6975267Swollman# was the first nationwide legal time standard, and apparently 7075267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 7117200Swollman 722742Swollman# From Arthur David Olson: 732742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 7419878Swollman# See, for example, the front page of the Saturday, 1974-10-26 7519878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 762742Swollman 772742Swollman# From Arthur David Olson: 782742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 792742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 802742Swollman 8167578Swollman# From Arthur David Olson (2000-09-25): 8267578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 8367578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 8467578Swollman# An AltaVista search turned up 8567578Swollman# <a href="http://rowayton.org/rhs/hstaug45.html">: 8667578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 8767578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 8867578Swollman# </a> (August 1945) by way of confirmation. 8967578Swollman 90149514Swollman# From Joseph Gallant citing 9167578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 9267578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 9386222Swollman# to switch to London for Attlee's address, but the American people 9467578Swollman# never got to hear his speech live. According to one press account, 9567578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 9667578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 9767578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 9886222Swollman# London which were to precede Mr. Attlee's speech. 9967578Swollman 100114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 101114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 102114173Swollman# 103114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 104114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 105114173Swollman# wire service teletype machine, which had prescribed signals for major news. 106114173Swollman# Associated Press, for example, would ring five bells before spewing out 107114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 108114173Swollman# importance." 109114173Swollman# 110114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 111114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 112114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 113114173Swollman# The Japanese have agreed to our surrender terms." 114114173Swollman# 115114173Swollman# He had scored a 20-second scoop on other broadcasters. 116114173Swollman 117149590Swollman# From Arthur David Olson (2005-08-22): 118149590Swollman# Paul has been careful to use the "US" rules only in those locations 119149590Swollman# that are part of the United States; this reflects the real scope of 120149590Swollman# U.S. government action. So even though the "US" rules have changed 121149590Swollman# in the latest release, other countries won't be affected. 122149590Swollman 1232742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12475267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1252742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1262742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 12767578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 1282742SwollmanRule US 1945 only - Sep 30 2:00 0 S 129149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1302742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1312742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1322742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1332742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 134149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 135149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 136149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1372742Swollman 138153761Swollman# From Arthur David Olson, 2005-12-19 139153761Swollman# We generate the files specified below to guard against old files with 140153761Swollman# obsolete information being left in the time zone binary directory. 141153761Swollman# We limit the list to names that have appeared in previous versions of 142153761Swollman# this time zone package. 143153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 144153761Swollman# a particular place changes whether it observes DST. 145153761Swollman# We put these specifications here in the northamerica file both to 146153761Swollman# increase the chances that they'll actually get compiled and to 147153761Swollman# avoid the need to duplicate the US rules in another file. 148153761Swollman 149153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 150153761SwollmanZone EST -5:00 - EST 151153761SwollmanZone MST -7:00 - MST 152153761SwollmanZone HST -10:00 - HST 153153761SwollmanZone EST5EDT -5:00 US E%sT 154153761SwollmanZone CST6CDT -6:00 US C%sT 155153761SwollmanZone MST7MDT -7:00 US M%sT 156153761SwollmanZone PST8PDT -8:00 US P%sT 157153761Swollman 15819878Swollman# From Bob Devine (1988-01-28): 1592742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1602742Swollman# old new 1612742Swollman# Pacific Standard Time(PST) -same- 1622742Swollman# Yukon Standard Time(YST) -same- 1632742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1642742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1652742Swollman# 1662742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1672742Swollman# The YST zone now covers nearly all of the state, AHST just part 1682742Swollman# of the Aleutian islands. No DST. 1692742Swollman 17014343Swollman# From Paul Eggert (1995-12-19): 17114343Swollman# The tables below use `NST', not `NT', for Nome Standard Time. 17214343Swollman# I invented `CAWT' for Central Alaska War Time. 17314343Swollman 17419878Swollman# From U. S. Naval Observatory (1989-01-19): 1752742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1762742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1772742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1782742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1792742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1802742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1812742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1822742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1832742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1842742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1852742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 1862742Swollman# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 1872742Swollman# USA HAWAII 10 H BEHIND UTC 1882742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1892742Swollman 19019878Swollman# From Arthur David Olson (1989-01-21): 1912742Swollman# The above dates are for 1988. 1922742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1932742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1942742Swollman# Aleutians. 1952742Swollman 19619878Swollman# From Arthur David Olson (1988-02-13): 1972742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1982742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 19919878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 2002742Swollman# took effect), as explained in sections 263 and 261: 2012742Swollman# (none) 2022742Swollman# United States standard eastern time 2032742Swollman# United States standard mountain time 2042742Swollman# United States standard central time 2052742Swollman# United States standard Pacific time 2062742Swollman# (none) 2072742Swollman# United States standard Alaska time 2082742Swollman# (none) 20919878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2102742Swollman# public law 98-181): 2112742Swollman# Atlantic standard time 2122742Swollman# eastern standard time 2132742Swollman# central standard time 2142742Swollman# mountain standard time 2152742Swollman# Pacific standard time 2162742Swollman# Yukon standard time 2172742Swollman# Alaska-Hawaii standard time 2182742Swollman# Bering standard time 21919878Swollman# And after 1983-11-30: 2202742Swollman# Atlantic standard time 2212742Swollman# eastern standard time 2222742Swollman# central standard time 2232742Swollman# mountain standard time 2242742Swollman# Pacific standard time 2252742Swollman# Alaska standard time 2262742Swollman# Hawaii-Aleutian standard time 2272742Swollman# Samoa standard time 2282742Swollman# The law doesn't give abbreviations. 22914343Swollman# 23075267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 23175267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 23275267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 23375267Swollman# See the file "australasia". 234158421Swollman 235149514Swollman# From Arthur David Olson, 2005-08-09 236149514Swollman# The following was signed into law on 2005-08-08. 237149514Swollman# 238149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 239149514Swollman# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 240149514Swollman# U.S.C. 260a(a)) is amended-- 241149514Swollman# (1) by striking `first Sunday of April' and inserting `second 242149514Swollman# Sunday of March'; and 243149514Swollman# (2) by striking `last Sunday of October' and inserting `first 244149514Swollman# Sunday of November'. 245149514Swollman# (b) Effective Date- Subsection (a) shall take effect 1 year after the 246149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 247149514Swollman# (c) Report to Congress- Not later than 9 months after the effective 248149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 249149514Swollman# on the impact of this section on energy consumption in the United 250149514Swollman# States. 251149514Swollman# (d) Right to Revert- Congress retains the right to revert the 252149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 253149514Swollman# Department study is complete. 2542742Swollman 25586222Swollman# US eastern time, represented by New York 25675267Swollman 25767578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 258149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 259149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 260114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 261114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 262114173Swollman# Vermont, Virginia, West Virginia 26367578Swollman 264149514Swollman# From Dave Cantor (2004-11-02): 265149514Swollman# Early this summer I had the occasion to visit the Mount Washington 266149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 267149514Swollman# One of the staff members said that the station was on Eastern Standard Time 268149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 269149514Swollman# reports will always have times which are 5 hours behind UTC. 270149514Swollman 271153670Swollman# From Paul Eggert (2005-08-26): 272153670Swollman# According to today's Huntsville Times 273153670Swollman# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 274153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 275153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 276153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 277153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 278153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 279158421Swollman# in Columbus." 280153670Swollman 28114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 28214343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 28314343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 28414343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 28514343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 28614343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 28714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 288149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 28914343Swollman -5:00 US E%sT 1920 29014343Swollman -5:00 NYC E%sT 1942 29114343Swollman -5:00 US E%sT 1946 29214343Swollman -5:00 NYC E%sT 1967 29314343Swollman -5:00 US E%sT 2942742Swollman 29586222Swollman# US central time, represented by Chicago 29667578Swollman 297136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 298136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 299136638Swollman# Washington counties), Illinois, western Indiana 300114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 301114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 302114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 303114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 304114173Swollman# western Tennessee, most of Texas, Wisconsin 30567578Swollman 306158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 307158421Swollman# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 308158421Swollman# is currently enforced at the 01:00 time of change. Because the local 309158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 310158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 311158421Swollman# hours" within the deviated hour of this change every year.... 312169811Swollman# 313169811Swollman# From Douglas R. Bomberg (2007-03-12): 314169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 315169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 316169811Swollman# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 317158421Swollman 31814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 31914343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 32014343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 32114343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 32214343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 32314343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 32414343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 32514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 326149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 32714343Swollman -6:00 US C%sT 1920 32814343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 32914343Swollman -5:00 - EST 1936 Nov 15 2:00 33014343Swollman -6:00 Chicago C%sT 1942 33114343Swollman -6:00 US C%sT 1946 33214343Swollman -6:00 Chicago C%sT 1967 33314343Swollman -6:00 US C%sT 33486222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 335149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 33686222Swollman -7:00 US M%sT 1992 Oct 25 02:00 33786222Swollman -6:00 US C%sT 338158421Swollman# Morton County, ND, switched from mountain to central time on 339158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 340158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 341158421Swollman# Officially this switch also included part of Sioux County, and 342158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 343158421Swollman# but in practice these other counties were already observing central time. 344158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 345158421SwollmanZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 346158421Swollman -7:00 US M%sT 2003 Oct 26 02:00 347158421Swollman -6:00 US C%sT 3482742Swollman 349219149Sedwin# From Josh Findley (2011-01-21): 350219149Sedwin# ...it appears that Mercer County, North Dakota, changed from the 351219149Sedwin# mountain time zone to the central time zone at the last transition from 352219149Sedwin# daylight-saving to standard time (on Nov. 7, 2010): 353219149Sedwin# <a href="http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm"> 354219149Sedwin# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 355219149Sedwin# </a> 356219149Sedwin# <a href="http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html"> 357219149Sedwin# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 358219149Sedwin# </a> 359219149Sedwin 360219149Sedwin# From Andy Lipscomb (2011-01-24): 361219149Sedwin# ...according to the Census Bureau, the largest city is Beulah (although 362219149Sedwin# it's commonly referred to as Beulah-Hazen, with Hazen being the next 363219149Sedwin# largest city in Mercer County). Google Maps places Beulah's city hall 364219149Sedwin# at 4715'51" north, 10146'40" west, which yields an offset of 6h47'07". 365219149Sedwin 366219149SedwinZone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 367219149Sedwin -7:00 US M%sT 2010 Nov 7 2:00 368219149Sedwin -6:00 US C%sT 369219149Sedwin 37086222Swollman# US mountain time, represented by Denver 37167578Swollman# 372136638Swollman# Colorado, far western Kansas, Montana, western 37386222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 374171948Sedwin# New Mexico, southwestern North Dakota, 37575267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 37675267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 37767578Swollman# 37814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 37914343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 38014343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 38114343SwollmanRule Denver 1921 only - May 22 2:00 0 S 38214343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 38314343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 3842742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 385149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 38615309Swollman -7:00 US M%sT 1920 38715309Swollman -7:00 Denver M%sT 1942 38815309Swollman -7:00 US M%sT 1946 38915309Swollman -7:00 Denver M%sT 1967 39015309Swollman -7:00 US M%sT 3912742Swollman 39214343Swollman# US Pacific time, represented by Los Angeles 39367578Swollman# 394136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 395171948Sedwin# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 396171948Sedwin# and the northern three-quarters of Idaho county), 397136638Swollman# most of Nevada, most of Oregon, and Washington 39867578Swollman# 39914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 40014343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 40114343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 40214343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 40314343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 40414343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 40514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 406149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 40714343Swollman -8:00 US P%sT 1946 40814343Swollman -8:00 CA P%sT 1967 40914343Swollman -8:00 US P%sT 4108029Swollman 41114343Swollman# Alaska 41214343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 41314343Swollman# 41486222Swollman# From Paul Eggert (2001-05-30): 41514343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 41619878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 41775267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 41875267Swollman# also a Friday. Include only the time zone part of this transition, 41975267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 42075267Swollman# the Julian calendar. 42114343Swollman# 42286222Swollman# As far as we know, none of the exact locations mentioned below were 42386222Swollman# permanently inhabited in 1867 by anyone using either calendar. 42486222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 42586222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 42686222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 42786222Swollman# it's best to simply use the official transition. 42886222Swollman# 429219411Sedwin 430219411Sedwin# From Steve Ferguson (2011-01-31): 431219411Sedwin# The author lives in Alaska and many of the references listed are only 432219411Sedwin# available to Alaskan residents. 433219411Sedwin# 434219411Sedwin# <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98"> 435219411Sedwin# http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98 436219411Sedwin# </a> 437219411Sedwin 438219411Sedwin# From Arthur David Olson (2011-02-01): 439219411Sedwin# Here's database-relevant material from the 2001 "Alaska History" article: 440219411Sedwin# 441219411Sedwin# On September 20 [1979]...DOT...officials decreed that on April 27, 442219411Sedwin# 1980, Juneau and other nearby communities would move to Yukon Time. 443219411Sedwin# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 444219411Sedwin# Pacific Time. 445219411Sedwin# 446219411Sedwin# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 447219411Sedwin# Department's September 1979 decision. Juneau and other communities in 448219411Sedwin# northern Southeast reverted to Pacific Time on October 26. 449219411Sedwin# 450219411Sedwin# On October 28 [1983]...the Metlakatla Indian Community Council voted 451219411Sedwin# unanimously to keep the reservation on Pacific Time. 452219411Sedwin# 453219411Sedwin# According to DOT official Joanne Petrie, Indian reservations are not 454219411Sedwin# bound to follow time zones imposed by neighboring jurisdictions. 455219411Sedwin# 456219411Sedwin# (The last is consistent with how the database now handles the Navajo 457219411Sedwin# Nation.) 458219411Sedwin 459219411Sedwin# From Arthur David Olson (2011-02-09): 460219411Sedwin# I just spoke by phone with a staff member at the Metlakatla Indian 461219411Sedwin# Community office (using contact information available at 462219411Sedwin# <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla"> 463219411Sedwin# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 464219411Sedwin# </a>). 465219411Sedwin# It's shortly after 1:00 here on the east coast of the United States; 466219411Sedwin# the staffer said it was shortly after 10:00 there. When I asked whether 467219411Sedwin# that meant they were on Pacific time, they said no--they were on their 468219411Sedwin# own time. I asked about daylight saving; they said it wasn't used. I 469219411Sedwin# did not inquire about practices in the past. 470219411Sedwin 47114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 47275267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 47375267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 47414343Swollman -8:00 - PST 1942 47514343Swollman -8:00 US P%sT 1946 47614343Swollman -8:00 - PST 1969 477219411Sedwin -8:00 US P%sT 1980 Apr 27 2:00 478219411Sedwin -9:00 US Y%sT 1980 Oct 26 2:00 47914343Swollman -8:00 US P%sT 1983 Oct 30 2:00 480136638Swollman -9:00 US Y%sT 1983 Nov 30 48114343Swollman -9:00 US AK%sT 482219411SedwinZone America/Sitka -14:58:47 - LMT 1867 Oct 18 483219411Sedwin -9:01:13 - LMT 1900 Aug 20 12:00 484219411Sedwin -8:00 - PST 1942 485219411Sedwin -8:00 US P%sT 1946 486219411Sedwin -8:00 - PST 1969 487219411Sedwin -8:00 US P%sT 1983 Oct 30 2:00 488219411Sedwin -9:00 US Y%sT 1983 Nov 30 489219411Sedwin -9:00 US AK%sT 490219411SedwinZone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 491219411Sedwin -8:46:18 - LMT 1900 Aug 20 12:00 492219411Sedwin -8:00 - PST 1942 493219411Sedwin -8:00 US P%sT 1946 494219411Sedwin -8:00 - PST 1969 495219411Sedwin -8:00 US P%sT 1983 Oct 30 2:00 496219411Sedwin -8:00 US MeST 49775267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 49875267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 49914343Swollman -9:00 - YST 1942 50014343Swollman -9:00 US Y%sT 1946 50114343Swollman -9:00 - YST 1969 502136638Swollman -9:00 US Y%sT 1983 Nov 30 50314343Swollman -9:00 US AK%sT 50475267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 50575267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 50614343Swollman -10:00 - CAT 1942 507158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 508158421Swollman -10:00 US CAT/CAPT 1946 # Peace 50914343Swollman -10:00 - CAT 1967 Apr 51014343Swollman -10:00 - AHST 1969 51114343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 512136638Swollman -9:00 US Y%sT 1983 Nov 30 51314343Swollman -9:00 US AK%sT 51475267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 51575267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 51614343Swollman -11:00 - NST 1942 51714343Swollman -11:00 US N%sT 1946 51814343Swollman -11:00 - NST 1967 Apr 51914343Swollman -11:00 - BST 1969 52014343Swollman -11:00 US B%sT 1983 Oct 30 2:00 521136638Swollman -9:00 US Y%sT 1983 Nov 30 52214343Swollman -9:00 US AK%sT 52375267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 52475267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 52514343Swollman -11:00 - NST 1942 52614343Swollman -11:00 US N%sT 1946 52714343Swollman -11:00 - NST 1967 Apr 52814343Swollman -11:00 - BST 1969 52914343Swollman -11:00 US B%sT 1983 Oct 30 2:00 530136638Swollman -10:00 US AH%sT 1983 Nov 30 53114343Swollman -10:00 US HA%sT 532149514Swollman# The following switches don't quite make our 1970 cutoff. 533149514Swollman# 53414343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 53514343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 53614343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 537149514Swollman# 538149514Swollman# From David Flater (2004-11-09): 539149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 540149514Swollman# Historic Preservation Commission, provided this information, which 541149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 542149514Swollman# possibly until 1983: 543149514Swollman# 544149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 545149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 546149514Swollman# location not on Alaska Standard Time. The following resolution was 547149514Swollman# made by William Robinson and seconded by Henry Swanson: Be it 548149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 549149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 550149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 551149514Swollman# three votes for and one against." 5522742Swollman 55314343Swollman# Hawaii 554218122Sedwin 555218122Sedwin# From Arthur David Olson (2010-12-09): 556218122Sedwin# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 557218122Sedwin# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 558218122Sedwin# the article is available at 559218122Sedwin# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> 560218122Sedwin# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 561218122Sedwin# </a> 562218122Sedwin# and indicates that standard time was adopted effective noon, January 563218122Sedwin# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 564218122Sedwin# saving for the period between the last Sunday of each April and the 565218122Sedwin# last Sunday of each September, but less than a month later repealed the 566218122Sedwin# act," (page 220), that year-round daylight saving time was in effect 567218122Sedwin# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 568218122Sedwin# when clocks changed) and that clocks were changed by 30 minutes 569218122Sedwin# effective the second Sunday of June, 1947 (page 219, with no time of 570218122Sedwin# day given for when clocks changed). A footnote for the 1933 changes 571218122Sedwin# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 572218122Sedwin# and Act 163 (approved 21 May 1933)." 573218122Sedwin 574218122Sedwin# From Arthur David Olson (2011-01-19): 575218122Sedwin# The following is from "Laws of the Territory of Hawaii Passed by the 576218122Sedwin# Seventeenth Legislature: Regular Session 1933," available (as of 577218122Sedwin# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 578218122Sedwin# 90...At 2 o'clock ante meridian of the last Sunday in April of each 579218122Sedwin# year, the standard time of this Territory shall be advanced one 580218122Sedwin# hour...This Act shall take effect upon its approval. Approved this 26th 581218122Sedwin# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 582218122Sedwin# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 583218122Sedwin# hereby repealed...This Act shall take effect upon its approval, upon 584218122Sedwin# which date the standard time of this Territory shall be restored to 585218122Sedwin# that existing immediately prior to the taking effect of said Act 90. 586218122Sedwin# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 587218122Sedwin# of the Territory of Hawaii." 58814343Swollman# 589218122Sedwin# Note that 1933-05-21 was a Sunday. 590218122Sedwin# We're left to guess the time of day when Act 163 was approved; guess noon. 591218122Sedwin 592218122SedwinZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 593218122Sedwin -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 594218122Sedwin -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 595218122Sedwin -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 596218122Sedwin -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Fox+2 597218122Sedwin -10:30 US H%sT 1947 Jun 8 2:00 #Schmitt&Fox+2 59814343Swollman -10:00 - HST 5992742Swollman 60014343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 60114343Swollman 60214343Swollman# Arizona mostly uses MST. 603114173Swollman 604114173Swollman# From Paul Eggert (2002-10-20): 605114173Swollman# 606114173Swollman# The information in the rest of this paragraph is derived from the 607114173Swollman# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 608114173Swollman# Daylight Saving Time web page (2002-01-23)</a> maintained by the 609114173Swollman# Arizona State Library, Archives and Public Records. 610114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 611114173Swollman# time, but by federal law railroads, airlines, bus lines, military 612114173Swollman# personnel, and some engaged in interstate commerce continued to 613114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 614114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 615114173Swollman# the date the state's clocks would change. In 1945 the State of 616114173Swollman# Arizona used standard time all year, again with exceptions only as 617114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 618114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 619114173Swollman# 620114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 621114173Swollman# Go with the Arizona State Library instead. 622114173Swollman 623149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 62414343Swollman -7:00 US M%sT 1944 Jan 1 00:01 625114173Swollman -7:00 - MST 1944 Apr 1 00:01 62614343Swollman -7:00 US M%sT 1944 Oct 1 00:01 62714343Swollman -7:00 - MST 1967 628114173Swollman -7:00 US M%sT 1968 Mar 21 62914343Swollman -7:00 - MST 63019878Swollman# From Arthur David Olson (1988-02-13): 63114343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 632136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 6332742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 6342742Swollman# large size and location in three states." (The "only" means that other 6352742Swollman# tribal nations don't use DST.) 6362742Swollman 63714343SwollmanLink America/Denver America/Shiprock 6382742Swollman 639136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 640136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 641136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 642136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 643171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 644171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 645136638Swollman# switched four weeks late in 1974. 646149514Swollman# 64714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 648149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 64914343Swollman -8:00 US P%sT 1923 May 13 2:00 65014343Swollman -7:00 US M%sT 1974 65114343Swollman -7:00 - MST 1974 Feb 3 2:00 65214343Swollman -7:00 US M%sT 6532742Swollman 65414343Swollman# Indiana 65514343Swollman# 65658787Sru# For a map of Indiana's time zone regions, see: 65758787Sru# <a href="http://www.mccsc.edu/time.html"> 65858787Sru# What time is it in Indiana? 659158421Swollman# </a> (2006-03-01) 66058787Sru# 661171948Sedwin# From Paul Eggert (2007-08-17): 662149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 663149590Swollman# with the following exceptions: 664149590Swollman# 665149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 666149590Swollman# Vandenburgh, and Warrick counties have been like America/Chicago. 667149590Swollman# 668149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 669149590Swollman# 670149590Swollman# - Clark, Floyd, and Harrison counties have been like 671149590Swollman# America/Kentucky/Louisville. 672149590Swollman# 673171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 674171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 675158421Swollman# 676158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 677158421Swollman# and wrote ``Even newspaper reports present contradictory information.'' 678158421Swollman# Those Hoosiers! Such a flighty and changeable people! 67914343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 68014343Swollman# 68114343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 68214343Swollman# that they would be ambiguous if we left them at the `America' level. 68314343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 68475267Swollman 685149514Swollman# From Paul Eggert (2005-08-16): 686158421Swollman# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 68775267Swollman 688158421Swollman# From Nathan Stratton Treadway (2006-03-30): 689158421Swollman# http://www.dot.gov/affairs/dot0406.htm [3705 B] 690158421Swollman# From Deborah Goldsmith (2006-01-18): 691158421Swollman# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 692158421Swollman# From Paul Eggert (2006-01-20): 693158421Swollman# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 694158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 695158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 696158421Swollman# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 697158421Swollman# changeover date from standard time to Daylight Saving Time." 698158421Swollman# Strictly speaking, this means the affected counties will change their 699158421Swollman# clocks twice that night, but this obviously is in error. The intent 700158421Swollman# is that 01:59:59 EST be followed by 02:00:00 CDT. 701158421Swollman 702169811Swollman# From Gwillim Law (2007-02-10): 703169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 704169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 705169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 706169811Swollman 70714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 70814343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 70914343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 71014343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 71114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 712149514SwollmanZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 71314343Swollman -6:00 US C%sT 1920 71414343Swollman -6:00 Indianapolis C%sT 1942 71514343Swollman -6:00 US C%sT 1946 71614343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 71714343Swollman -5:00 - EST 1957 Sep 29 2:00 71814343Swollman -6:00 - CST 1958 Apr 27 2:00 71914343Swollman -5:00 - EST 1969 72014343Swollman -5:00 US E%sT 1971 721149514Swollman -5:00 - EST 2006 722149514Swollman -5:00 US E%sT 7232742Swollman# 724158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 725158421Swollman# as well as from 1976 through 2005. 72614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 72714343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 72814343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 72914343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 73014343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 73114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 732149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 73314343Swollman -6:00 US C%sT 1951 73414343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 73514343Swollman -5:00 - EST 1969 73614343Swollman -5:00 US E%sT 1974 Jan 6 2:00 73714343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 73814343Swollman -5:00 US E%sT 1976 739149514Swollman -5:00 - EST 2006 740149514Swollman -5:00 US E%sT 74114343Swollman# 742171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 743171948Sedwin# switched from eastern to central time in April 2006, then switched back 744171948Sedwin# in November 2007. 745158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 746158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 747158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 748158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 749158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 750158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 751158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 752158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 753158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 754158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 755158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 756158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 757158421Swollman -6:00 US C%sT 1946 758158421Swollman -6:00 Vincennes C%sT 1964 Apr 26 2:00 759158421Swollman -5:00 - EST 1969 760158421Swollman -5:00 US E%sT 1971 761158421Swollman -5:00 - EST 2006 Apr 2 2:00 762171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 763171948Sedwin -5:00 US E%sT 764171948Sedwin# 765171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 766171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 767171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 768171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 769171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 770171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 771171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 772171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 773171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 774171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 775171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 776171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 777171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 778171948Sedwin -6:00 US C%sT 1946 779171948Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 780171948Sedwin -5:00 - EST 1969 781171948Sedwin -5:00 US E%sT 1971 782171948Sedwin -5:00 - EST 2006 Apr 2 2:00 783158421Swollman -6:00 US C%sT 784158421Swollman# 785158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 786171948Sedwin# then switched back in 2006, then switched back again in 2007. 787158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 788158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 789158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 790158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 791158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 792158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 793158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 794158421Swollman -6:00 US C%sT 1955 795158421Swollman -6:00 Pike C%sT 1965 Apr 25 2:00 796158421Swollman -5:00 - EST 1966 Oct 30 2:00 797158421Swollman -6:00 US C%sT 1977 Oct 30 2:00 798158421Swollman -5:00 - EST 2006 Apr 2 2:00 799171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 800171948Sedwin -5:00 US E%sT 801158421Swollman# 802158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 803158421Swollman# then switched back in 2006. 80419878Swollman# From Arthur David Olson (1991-10-28): 80519878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 80614343Swollman# notes that Starke County switched from Central time to Eastern time as of 80719878Swollman# 1991-10-27. 80814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 80914343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 81014343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 81114343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 81214343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 81314343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 81414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 815149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 81614343Swollman -6:00 US C%sT 1947 81714343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 81814343Swollman -5:00 - EST 1963 Oct 27 2:00 81914343Swollman -6:00 US C%sT 1991 Oct 27 2:00 820158421Swollman -5:00 - EST 2006 Apr 2 2:00 821158421Swollman -6:00 US C%sT 82214343Swollman# 823169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 824169811Swollman# April 2006 and then switched back in March 2007. 825169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 826169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 827169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 828169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 829169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 830169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 831169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 832169811Swollman -6:00 US C%sT 1946 833169811Swollman -6:00 Pulaski C%sT 1961 Apr 30 2:00 834169811Swollman -5:00 - EST 1969 835169811Swollman -5:00 US E%sT 1971 836169811Swollman -5:00 - EST 2006 Apr 2 2:00 837169811Swollman -6:00 US C%sT 2007 Mar 11 2:00 838169811Swollman -5:00 US E%sT 839169811Swollman# 840158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 84114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 842149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 84314343Swollman -6:00 US C%sT 1954 Apr 25 2:00 84414343Swollman -5:00 - EST 1969 84514343Swollman -5:00 US E%sT 1973 846149514Swollman -5:00 - EST 2006 847149514Swollman -5:00 US E%sT 8482742Swollman 84914343Swollman# Part of Kentucky left its clocks alone in 1974. 850149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 85114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 85214343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 85314343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 85414343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 85514343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 85614343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 85714343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 85814343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 85914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 860149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 86114343Swollman -6:00 US C%sT 1921 86214343Swollman -6:00 Louisville C%sT 1942 86314343Swollman -6:00 US C%sT 1946 86414343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 86514343Swollman -5:00 - EST 1968 86614343Swollman -5:00 US E%sT 1974 Jan 6 2:00 86714343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 86814343Swollman -5:00 US E%sT 86967578Swollman# 870158421Swollman# Wayne County, Kentucky 87158787Sru# 87258787Sru# From 87358787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 87458787Sru# Lake Cumberland LIFE 87558787Sru# </a> (1999-01-29) via WKYM-101.7: 87658787Sru# Clinton County has joined Wayne County in asking the DoT to change from 87758787Sru# the Central to the Eastern time zone.... The Wayne County government made 87858787Sru# the same request in December. And while Russell County officials have not 87958787Sru# taken action, the majority of respondents to a poll conducted there in 88058787Sru# August indicated they would like to change to "fast time" also. 88158787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 88258787Sru# location in the Central time zone. 88367578Swollman# 88467578Swollman# From Rich Wales (2000-08-29): 88567578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 88667578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 88775267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 88875267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 88986222Swollman# 89086222Swollman# From Paul Eggert (2001-07-16): 89186222Swollman# The final rule was published in the 89286222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 89386222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 89486222Swollman# </a> 895114173Swollman# 896149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 89767578Swollman -6:00 US C%sT 1946 89867578Swollman -6:00 - CST 1968 89967578Swollman -6:00 US C%sT 2000 Oct 29 2:00 90067578Swollman -5:00 US E%sT 9012742Swollman 90267578Swollman 90367578Swollman# From Rives McDow (2000-08-30): 90467578Swollman# Here ... are all the changes in the US since 1985. 90567578Swollman# Kearny County, KS (put all of county on central; 90667578Swollman# previously split between MST and CST) ... 1990-10 90767578Swollman# Starke County, IN (from CST to EST) ... 1991-10 90867578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 90967578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 91067578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 91167578Swollman# 91286222Swollman# From Paul Eggert (2001-07-17): 91386222Swollman# We don't know where the line used to be within Kearny County, KS, 91486222Swollman# so omit that change for now. 91586222Swollman# See America/Indiana/Knox for the Starke County, IN change. 91686222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 91786222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 91886222Swollman# 1999-10-31. See the 91986222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 92086222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 92186222Swollman# </a> 92286222Swollman# However, the Federal Register says that West Wendover already operated 92386222Swollman# on mountain time, and the rule merely made this official; 92486222Swollman# hence a separate tz entry is not needed. 92567578Swollman 92614343Swollman# Michigan 92714343Swollman# 92819878Swollman# From Bob Devine (1988-01-28): 92914343Swollman# Michigan didn't observe DST from 1968 to 1973. 93014343Swollman# 93158787Sru# From Paul Eggert (1999-03-31): 93258787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 93358787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 93458787Sru# that Detroit kept 93514343Swollman# 93614343Swollman# local time until 1900 when the City Council decreed that clocks should 93714343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 93814343Swollman# city obeyed, half refused. After considerable debate, the decision 93914343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 94014343Swollman# erect a sundial in front of the city hall was referred to the 94114343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 94214343Swollman# by city vote. 94314343Swollman# 94414343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 94514343Swollman# 94675267Swollman# From Paul Eggert (2001-03-06): 94775267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 94875267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 94975267Swollman# info, so omit this for now. 95075267Swollman# 95114343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 95214343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 95314343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 95414343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 95514343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 95614343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 95714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 95814343SwollmanZone America/Detroit -5:32:11 - LMT 1905 95914343Swollman -6:00 - CST 1915 May 15 2:00 96014343Swollman -5:00 - EST 1942 96114343Swollman -5:00 US E%sT 1946 96214343Swollman -5:00 Detroit E%sT 1973 96314343Swollman -5:00 US E%sT 1975 96414343Swollman -5:00 - EST 1975 Apr 27 2:00 96514343Swollman -5:00 US E%sT 96614343Swollman# 967158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 968158421Swollman# switched from EST to CST/CDT in 1973. 96914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 97014343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 97114343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 97214343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 97314343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 97414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 97514343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 97614343Swollman -6:00 US C%sT 1946 97714343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 97814343Swollman -5:00 - EST 1973 Apr 29 2:00 97914343Swollman -6:00 US C%sT 98014343Swollman 9812742Swollman# Navassa 98286222Swollman# administered by the US Fish and Wildlife Service 98343543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 98443543Swollman# also claimed by Haiti 98543543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 98686222Swollman# US lighthouse 1917/1996-09 98743543Swollman# currently uninhabited 98843543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 98943543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 99043543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 99114343Swollman 9922742Swollman################################################################################ 9932742Swollman 9942742Swollman 995158421Swollman# From Paul Eggert (2006-03-22): 996158421Swollman# A good source for time zone historical data outside the U.S. is 997158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 998158421Swollman# San Diego: ACS Publications, Inc. (2003). 9992742Swollman# 100086222Swollman# Gwillim Law writes that a good source 100120094Swollman# for recent time zone data is the International Air Transport 100220094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 100320094Swollman# published semiannually. Law sent in several helpful summaries 100420094Swollman# of the IATA's data after 1990. 100520094Swollman# 1006158421Swollman# Except where otherwise noted, Shanks & Pottenger is the source for 1007158421Swollman# entries through 1990, and IATA SSIM is the source for entries afterwards. 100820094Swollman# 1009121098Swollman# Other sources occasionally used include: 10102742Swollman# 1011121098Swollman# Edward W. Whitman, World Time Differences, 1012121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1013121098Swollman# which I found in the UCLA library. 1014121098Swollman# 1015121098Swollman# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 1016121098Swollman# William Willett, The Waste of Daylight, 19th edition 1017121098Swollman# </a> (1914-03) 1018121098Swollman# 10199908Swollman# See the `europe' file for Greenland. 10202742Swollman 10212742Swollman# Canada 10222742Swollman 1023149514Swollman# From Alain LaBont<e'> (1994-11-14): 10249908Swollman# I post here the time zone abbreviations standardized in Canada 10259908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 10269908Swollman# 10279908Swollman# UTC Standard time Daylight savings time 10289908Swollman# offset French English French English 10299908Swollman# -2:30 - - HAT NDT 10309908Swollman# -3 - - HAA ADT 10319908Swollman# -3:30 HNT NST - - 10329908Swollman# -4 HNA AST HAE EDT 10339908Swollman# -5 HNE EST HAC CDT 10349908Swollman# -6 HNC CST HAR MDT 10359908Swollman# -7 HNR MST HAP PDT 10369908Swollman# -8 HNP PST HAY YDT 10379908Swollman# -9 HNY YST - - 10389908Swollman# 10399908Swollman# HN: Heure Normale ST: Standard Time 10409908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 10419908Swollman# 10429908Swollman# A: de l'Atlantique Atlantic 10439908Swollman# C: du Centre Central 10449908Swollman# E: de l'Est Eastern 10459908Swollman# M: Mountain 10469908Swollman# N: Newfoundland 10479908Swollman# P: du Pacifique Pacific 10489908Swollman# R: des Rocheuses 10499908Swollman# T: de Terre-Neuve 10509908Swollman# Y: du Yukon Yukon 10519908Swollman# 1052149514Swollman# From Paul Eggert (1994-11-22): 10539908Swollman# Alas, this sort of thing must be handled by localization software. 10542742Swollman 1055158421Swollman# Unless otherwise specified, the data for Canada are all from Shanks 1056158421Swollman# & Pottenger. 10579908Swollman 1058169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1059169811Swollman# 2007-03-01): 1060158421Swollman# The British Columbia government announced yesterday that it will 1061158421Swollman# adjust daylight savings next year to align with changes in the 1062158421Swollman# U.S. and the rest of Canada.... 1063158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1064169811Swollman# ... 1065169811Swollman# Nova Scotia 1066163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 1067169811Swollman# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1068169811Swollman# 1069163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 1070163302Sru# be done at 02:00 instead of 00:01. 1071163302Sru# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1072163302Sru# ... 1073163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 1074163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 1075163302Sru# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1076163302Sru# ... 1077163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 1078169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1079163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1080169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1081163302Sru# ... 1082169811Swollman# P.E.I. will follow US rules.... 1083169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1084163302Sru# ... 1085169811Swollman# Province of Newfoundland and Labrador.... 1086169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1087163302Sru# ... 1088169811Swollman# Yukon 1089169811Swollman# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1090169811Swollman# ... 1091163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 1092163302Sru# does not seem to believe in bookmarks. To see the news release, click the 1093163302Sru# following link and search for "Daylight Savings Time Change". Press the 1094163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 1095163302Sru# JavaScript. 1096163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1097169811Swollman# ... 1098169811Swollman# Nunavut 1099169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 1100169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1101163302Sru 1102158421Swollman# From Paul Eggert (2006-04-25): 110367578Swollman# H. David Matthews and Mary Vincent's map 1104153761Swollman# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 110567578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 110667578Swollman# </a> contains detailed boundaries for regions observing nonstandard 110767578Swollman# time and daylight saving time arrangements in Canada circa 1998. 110867578Swollman# 1109153761Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has <a 1110153761Swollman# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 111167578Swollman# information about standard and daylight saving time zones in Canada. 111267578Swollman# </a> (updated periodically). 111367578Swollman# Its unofficial information is often taken from Matthews and Vincent. 11149908Swollman 1115163302Sru# From Paul Eggert (2006-06-27): 1116163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1117163302Sru# new US DST rules, 1118163302Sru 11192742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 112017200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 112117200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 1122121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1123121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 112417200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 112517200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1126153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1127153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1128153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1129153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 113017200Swollman 113117200Swollman 1132163302Sru# Newfoundland and Labrador 113317200Swollman 113467578Swollman# From Paul Eggert (2000-10-02): 113567578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 113667578Swollman# but the only part of Labrador that follows the rules is the 113767578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 113867578Swollman# but excluding, say, Black Tickle. 113967578Swollman 114017200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1141121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 11422742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1143158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 11442742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 11452742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1146158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 11472742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 11482742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1149158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1150158421Swollman# Pottenger. 1151121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1152121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1153121098Swollman# Whitman gives the following transitions: 1154121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1155158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 11562742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1157158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 11582742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 11592742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 11602742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 11612742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 116267578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 116367578Swollman# From Paul Eggert (2000-10-02): 116467578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 116567578Swollman# at 00:01 local time. For now, assume it started in 1987. 116667578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1167158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 116867578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1169158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1170158421SwollmanRule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D 1171158421SwollmanRule StJohns 2007 max - Nov Sun>=1 0:01 0 S 1172158421Swollman# 11732742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 11742742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 11752742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1176121098Swollman -3:30:52 StJohns N%sT 1918 1177121098Swollman -3:30:52 Canada N%sT 1919 117820094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1179121098Swollman -3:30 StJohns N%sT 1942 May 11 1180121098Swollman -3:30 Canada N%sT 1946 11812742Swollman -3:30 StJohns N%sT 11822742Swollman 118367578Swollman# most of east Labrador 118417200Swollman 118520094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 118620094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 118720094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1188121098Swollman -3:30:52 - NST 1918 1189121098Swollman -3:30:52 Canada N%sT 1919 119020094Swollman -3:30:52 - NST 1935 Mar 30 119120094Swollman -3:30 - NST 1936 1192121098Swollman -3:30 StJohns N%sT 1942 May 11 1193121098Swollman -3:30 Canada N%sT 1946 119420094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 119520094Swollman -4:00 StJohns A%sT 119620094Swollman 119720094Swollman 1198158421Swollman# west Labrador, Nova Scotia, Prince Edward I 119920094Swollman 1200158421Swollman# From Paul Eggert (2006-03-22): 1201158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1202158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 120317200Swollman# Glace Bay, NS is the largest that we know of. 1204158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1205158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1206158421Swollman# this is a typo. 120717200Swollman 12082742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1209158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1210158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1211158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1212158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1213158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1214158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1215158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1216158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1217158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1218158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1219158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1220158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1221158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1222158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1223158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1224158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1225158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1226158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1227158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1228158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1229158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1230158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1231158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1232158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1233158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1234158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1235158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1236158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1237158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1238158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1239158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1240158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1241158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1242158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1243158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1244158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1245158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1246158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1247158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1248158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1249158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 12502742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12512742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1252121098Swollman -4:00 Halifax A%sT 1918 1253121098Swollman -4:00 Canada A%sT 1919 1254121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 1255121098Swollman -4:00 Canada A%sT 1946 1256121098Swollman -4:00 Halifax A%sT 1974 1257121098Swollman -4:00 Canada A%sT 125817200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 125917200Swollman -4:00 Canada A%sT 1953 126017200Swollman -4:00 Halifax A%sT 1954 126117200Swollman -4:00 - AST 1972 1262121098Swollman -4:00 Halifax A%sT 1974 1263121098Swollman -4:00 Canada A%sT 12642742Swollman 1265158421Swollman# New Brunswick 12668029Swollman 1267169811Swollman# From Paul Eggert (2007-01-31): 1268169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1269169811Swollman# says they changed at 00:01 through 2006, and 1270158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1271169811Swollman# clear that this was the case since at least 1993. 1272163302Sru# For now, assume it started in 1993. 1273158421Swollman 1274158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1275158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1276158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1277158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1278158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1279158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1280158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1281158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1282158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1283158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1284158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1285158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1286158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1287158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1288158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1289158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1290158421Swollman -5:00 - EST 1902 Jun 15 1291158421Swollman -4:00 Canada A%sT 1933 1292158421Swollman -4:00 Moncton A%sT 1942 1293158421Swollman -4:00 Canada A%sT 1946 1294158421Swollman -4:00 Moncton A%sT 1973 1295158421Swollman -4:00 Canada A%sT 1993 1296163302Sru -4:00 Moncton A%sT 2007 1297163302Sru -4:00 Canada A%sT 1298158421Swollman 1299163302Sru# Quebec 130017200Swollman 1301163302Sru# From Paul Eggert (2006-07-09): 1302163302Sru# Shanks & Pottenger write that since 1970 most of Quebec has been 1303163302Sru# like Montreal. 1304163302Sru 1305163302Sru# From Paul Eggert (2006-06-27): 1306163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1307163302Sru# meridian is supposed to observe AST, but residents as far east as 1308163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1309163302Sru# In "Official time in Quebec" the Quebec department of justice writes in 1310163302Sru# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1311163302Sru# that "The residents of the Municipality of the 1312163302Sru# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1313163302Sru# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1314163302Sru# written and use Atlantic standard time all year round. The same applies to 1315163302Sru# the residents of the Native facilities along the lower North Shore." 1316163302Sru# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1317163302Sru# says this common practice was codified into law as of 2007. 1318163302Sru# For lack of better info, guess this practice began around 1970, contra to 1319163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1320163302Sru 1321163302Sru# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1322163302SruRule Mont 1917 only - Mar 25 2:00 1:00 D 1323163302SruRule Mont 1917 only - Apr 24 0:00 0 S 1324163302SruRule Mont 1919 only - Mar 31 2:30 1:00 D 1325163302SruRule Mont 1919 only - Oct 25 2:30 0 S 1326163302SruRule Mont 1920 only - May 2 2:30 1:00 D 1327163302SruRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1328163302SruRule Mont 1921 only - May 1 2:00 1:00 D 1329163302SruRule Mont 1922 only - Apr 30 2:00 1:00 D 1330163302SruRule Mont 1924 only - May 17 2:00 1:00 D 1331163302SruRule Mont 1924 1926 - Sep lastSun 2:30 0 S 1332163302SruRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1333163302Sru# The 1927-to-1937 rules can be expressed more simply as 1334163302Sru# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1335163302Sru# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1336163302Sru# The rules below avoid use of 24:00 1337163302Sru# (which pre-1998 versions of zic cannot handle). 1338163302SruRule Mont 1927 only - May 1 0:00 1:00 D 1339163302SruRule Mont 1927 1932 - Sep lastSun 0:00 0 S 1340163302SruRule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1341163302SruRule Mont 1932 only - May 1 0:00 1:00 D 1342163302SruRule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1343163302SruRule Mont 1933 only - Oct 1 0:00 0 S 1344163302SruRule Mont 1934 1939 - Sep lastSun 0:00 0 S 1345163302SruRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1346163302SruRule Mont 1945 1948 - Sep lastSun 2:00 0 S 1347163302SruRule Mont 1949 1950 - Oct lastSun 2:00 0 S 1348163302SruRule Mont 1951 1956 - Sep lastSun 2:00 0 S 1349163302SruRule Mont 1957 1973 - Oct lastSun 2:00 0 S 1350163302Sru 1351163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1352163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1353163302Sru -4:00 Canada A%sT 1970 1354163302Sru -4:00 - AST 1355163302SruZone America/Montreal -4:54:16 - LMT 1884 1356163302Sru -5:00 Mont E%sT 1918 1357163302Sru -5:00 Canada E%sT 1919 1358163302Sru -5:00 Mont E%sT 1942 Feb 9 2:00s 1359163302Sru -5:00 Canada E%sT 1946 1360163302Sru -5:00 Mont E%sT 1974 1361163302Sru -5:00 Canada E%sT 1362163302Sru 1363163302Sru 1364163302Sru# Ontario 1365163302Sru 1366163302Sru# From Paul Eggert (2006-07-09): 1367163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1368163302Sru# Toronto. 136917200Swollman# Thunder Bay skipped DST in 1973. 137017200Swollman# Many smaller locales did not observe peacetime DST until 1974; 137117200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 137217200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 137317200Swollman 1374121098Swollman# From Mark Brader (2003-07-26): 1375121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1376121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1377121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1378121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1379121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1380121098Swollman# hostility from certain segments of the public, and was revoked after 1381121098Swollman# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1382121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1383121098Swollman# earlier in June). 1384121098Swollman# 1385121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1386121098Swollman 138743014Swollman# From Paul Eggert (1997-10-17): 1388121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 138943014Swollman# says that Atikokan, Ontario currently does not observe DST, 139043014Swollman# but will vote on 11-10 whether to use EST/EDT. 139143014Swollman# He also writes that the 139243014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 139343014Swollman# Ontario Time Act (1990, Chapter T.9) 139443014Swollman# </a> 139543014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 139643014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 139743014Swollman# concerns a non-official time observed as a matter of local practice. 1398158421Swollman# 139967578Swollman# From Paul Eggert (2000-10-02): 140067578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 140167578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 140267578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 140367578Swollman# violation of the official Ontario rules. 1404163302Sru# 1405163302Sru# From Paul Eggert (2006-07-09): 1406163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1407163302Sru# 2005-07-21 Chronicle-Journal, which said: 1408163302Sru# 1409163302Sru# The clocks in Atikokan stay set on standard time year-round. 1410163302Sru# This means they spend about half the time on central time and 1411163302Sru# the other half on eastern time. 1412163302Sru# 1413163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1414163302Sru# 1415163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1416163302Sru# Canada, but there are some that deal with Western Canada," he 1417163302Sru# said. "I don't see any changes happening here." 1418163302Sru# 1419163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1420163302Sru# [New Osnaburgh] follow the same practice." 142167578Swollman 1422163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1423163302Sru# I chatted with a member of my board who has an outstanding memory 1424163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1425163302Sru# can say for certain that Atikokan has been practicing the current 1426163302Sru# time keeping since 1952, at least. 1427163302Sru 1428163302Sru# From Paul Eggert (2006-07-17): 1429163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1430163302Sru# ever since standard time was introduced, but the information from 1431163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1432163302Sru# switched to EST immediately after WWII era daylight saving time 1433163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1434163302Sru# entry since our cutoff date of 1970, so we can move 1435163302Sru# America/Coral_Harbour to the 'backward' file. 1436163302Sru 1437210718Sedwin# From Mark Brader (2010-03-06): 1438210718Sedwin# 1439210718Sedwin# Currently the database has: 1440210718Sedwin# 1441210718Sedwin# # Ontario 1442210718Sedwin# 1443210718Sedwin# # From Paul Eggert (2006-07-09): 1444210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1445210718Sedwin# # Toronto. 1446210718Sedwin# # Thunder Bay skipped DST in 1973. 1447210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1448210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1449210718Sedwin# 1450210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1451210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1452210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1453210718Sedwin# 1454210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1455210718Sedwin# except in areas like Windsor which remains on standard time all year. 1456210718Sedwin# 1457210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1458210718Sedwin# 1459210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1460210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1461210718Sedwin# 1462210718Sedwin# By the way, the article continues by noting that: 1463210718Sedwin# 1464210718Sedwin# Some cities in the United States have pushed the deadline back 1465210718Sedwin# three weeks and will change over from daylight saving in October. 1466210718Sedwin 1467210718Sedwin# From Arthur David Olson (2010-07-17): 1468210718Sedwin# 1469210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1470210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1471210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1472210718Sedwin# was available at 1473210718Sedwin# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1474210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1475210718Sedwin# </a> 1476210718Sedwin# 1477210718Sedwin# It includes the text below (starting on page 57): 1478210718Sedwin# 1479210718Sedwin# A list of the places in Canada using daylight saving time would 1480210718Sedwin# require yearly revision. From information kindly furnished by 1481210718Sedwin# the provincial governments and by the postmasters in many cities 1482210718Sedwin# and towns, it is found that the following places used daylight sav- 1483210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1484210718Sedwin# for the other provinces only approximate: 1485210718Sedwin# 1486210718Sedwin# Province Daylight saving time used 1487210718Sedwin# Prince Edward Island Not used. 1488210718Sedwin# Nova Scotia In Halifax only. 1489210718Sedwin# New Brunswick In St. John only. 1490210718Sedwin# Quebec In the following places: 1491210718Sedwin# Montreal Lachine 1492210718Sedwin# Quebec Mont-Royal 1493210718Sedwin# Levis Iberville 1494210718Sedwin# St. Lambert Cap de la Madeleine 1495210718Sedwin# Verdun Loretteville 1496210718Sedwin# Westmount Richmond 1497210718Sedwin# Outremont St. Jerome 1498210718Sedwin# Longueuil Greenfield Park 1499210718Sedwin# Arvida Waterloo 1500210718Sedwin# Chambly-Canton Beaulieu 1501210718Sedwin# Melbourne La Tuque 1502210718Sedwin# St. Theophile Buckingham 1503210718Sedwin# Ontario Used generally in the cities and towns along 1504210718Sedwin# the southerly part of the province. Not 1505210718Sedwin# used in the northwesterlhy part. 1506210718Sedwin# Manitoba Not used. 1507210718Sedwin# Saskatchewan In Regina only. 1508210718Sedwin# Alberta Not used. 1509210718Sedwin# British Columbia Not used. 1510210718Sedwin# 1511210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1512210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1513210718Sedwin 15142742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1515121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1516121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1517121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1518121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1519121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1520121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1521121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1522158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1523158421Swollman# was meant. 1524121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1525121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1526136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1527136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1528136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1529136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1530136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1531136638Swollman# The rules below avoid use of Sun>=25 1532136638Swollman# (which pre-2004 versions of zic cannot handle). 1533136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1534136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1535136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1536136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1537136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1538136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1539121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1540121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1541121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1542121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1543121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1544121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1545121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1546121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1547158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1548163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1549163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1550163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1551121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1552121098Swollman 1553121098Swollman# From Paul Eggert (2003-07-27): 1554121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1555121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1556121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1557136638Swollman# Saskatchewan, for one year." 1558121098Swollman 1559136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1560136638Swollman# Thunder Bay Museum (2003-11-12): 1561136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1562136638Swollman# savings time was being practiced in Fort William and Port Arthur 1563136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1564136638Swollman# Time Zones was permanently moved about two hundred miles west to 1565136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1566136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1567136638Swollman# already, did not change their clocks.... During the Second World 1568136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1569136638Swollman# months for the remainder of the war years. 1570136638Swollman 15712742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1572121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1573121098Swollman -5:00 Canada E%sT 1919 1574121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1575121098Swollman -5:00 Canada E%sT 1946 1576121098Swollman -5:00 Toronto E%sT 1974 1577121098Swollman -5:00 Canada E%sT 157817200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1579136638Swollman -6:00 - CST 1910 1580136638Swollman -5:00 - EST 1942 158117200Swollman -5:00 Canada E%sT 1970 158217200Swollman -5:00 Mont E%sT 1973 158317200Swollman -5:00 - EST 1974 158417200Swollman -5:00 Canada E%sT 158517200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1586121098Swollman -5:00 Canada E%sT 1940 Sep 29 1587121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 158817200Swollman -5:00 Canada E%sT 1589163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1590121098Swollman -6:00 Canada C%sT 1940 Sep 29 1591121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 159217200Swollman -6:00 Canada C%sT 1593163302SruZone America/Atikokan -6:06:28 - LMT 1895 1594163302Sru -6:00 Canada C%sT 1940 Sep 29 1595163302Sru -6:00 1:00 CDT 1942 Feb 9 2:00s 1596163302Sru -6:00 Canada C%sT 1945 Sep 30 2:00 1597163302Sru -5:00 - EST 15982742Swollman 15998029Swollman 160017200Swollman# Manitoba 160119878Swollman 1602158421Swollman# From Rob Douglas (2006-04-06): 1603158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1604158421Swollman# March 27, 1987 ... said ... 1605158421Swollman# "between two o'clock Central Standard Time in the morning of 1606158421Swollman# the first Sunday of April of each year and two o'clock Central 1607158421Swollman# Standard Time in the morning of the last Sunday of October next 1608158421Swollman# following, one hour in advance of Central Standard Time."... 1609158421Swollman# I believe that the English legislation [of the old time act] had = 1610158421Swollman# been assented to (March 22, 1967).... 1611158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1612158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1613158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1614158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1615158421Swollman 1616158421Swollman# From Paul Eggert (2006-04-10): 1617158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1618158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1619158421Swollman# it was also 02:00s in 1966. 1620158421Swollman 16212742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16222742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 16232742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 16242742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 16252742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 16262742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 162714343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1628121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1629121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 16302742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 16312742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 16322742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 16332742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 163414343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 163514343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 163614343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 163714343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 163814343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 16392742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 16402742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 16412742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 164214343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1643158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1644158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1645158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 16462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16472742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1648158421Swollman -6:00 Winn C%sT 2006 1649158421Swollman -6:00 Canada C%sT 16502742Swollman 16518029Swollman 165217200Swollman# Saskatchewan 165317200Swollman 1654121098Swollman# From Mark Brader (2003-07-26): 1655121098Swollman# The first actual adoption of DST in Canada was at the municipal 1656121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1657121098Swollman# elsewhere have long been talking of legislation to save daylight, 1658121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1659121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1660121098Swollman# presumably late evening, as below), and would run until "the end of 1661121098Swollman# the summer". The discrepancy between municipal time and railroad 1662121098Swollman# time was noted. 1663121098Swollman 1664121098Swollman# From Paul Eggert (2003-07-27): 1665121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1666121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1667121098Swollman 1668158421Swollman# From Paul Eggert (2006-03-22): 1669158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 167017200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 167117200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 167267578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 167367578Swollman# are like Winnipeg, in violation of Saskatchewan law. 167417200Swollman 1675149514Swollman# From W. Jones (1992-11-06): 167617200Swollman# The. . .below is based on information I got from our law library, the 167717200Swollman# provincial archives, and the provincial Community Services department. 167817200Swollman# A precise history would require digging through newspaper archives, and 167917200Swollman# since you didn't say what you wanted, I didn't bother. 168017200Swollman# 168117200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 168217200Swollman# the boundary became pretty ragged as communities near it reevaluated 168317200Swollman# their affiliations in one direction or the other. In 1965 a provincial 168417200Swollman# referendum favoured legislating common time practices. 168517200Swollman# 168617200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 168717200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 168817200Swollman# part of Saskatchewan would use CST year round, that districts in 168917200Swollman# northwest Saskatchewan would by default follow CST but could opt to 169017200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 169117200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 169217200Swollman# by default follow MT but could opt to follow CST. 169317200Swollman# 169417200Swollman# It took a few years for the dust to settle (I know one story of a town 169517200Swollman# on one time zone having its school in another, such that a mom had to 169617200Swollman# serve her family lunch in two shifts), but presently it seems that only 169717200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 169817200Swollman# rules any more; all other districts appear to have used CST year round 169917200Swollman# since sometime in the 1960s. 170017200Swollman 1701163302Sru# From Chris Walton (2006-06-26): 1702163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1703163302Sru# long and rather painful to read. 1704163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1705163302Sru 17062742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17072742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 17082742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 17092742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 17102742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 17112742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 17122742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 17132742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 17142742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1715121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1716121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 17172742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 171817200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 171917200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1720121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1721121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1722121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 172317200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 172417200Swollman# 172517200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 172617200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 172717200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 172817200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 172917200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 17302742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 173117200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 173217200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 17332742Swollman -6:00 - CST 173417200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 173517200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 173617200Swollman -7:00 Regina M%sT 1950 173717200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 173817200Swollman -6:00 - CST 17392742Swollman 17408029Swollman 174117200Swollman# Alberta 174217200Swollman 17432742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17442742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 17452742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 17462742SwollmanRule Edm 1919 only - May 27 2:00 0 S 17472742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 17482742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 17492742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1750121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1751121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 17522742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 17532742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 17542742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 17552742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 17562742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 17572742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 17582742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 17592742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1760158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 17612742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17622742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1763158421Swollman -7:00 Edm M%sT 1987 1764158421Swollman -7:00 Canada M%sT 17652742Swollman 17668029Swollman 176717200Swollman# British Columbia 176817200Swollman 1769158421Swollman# From Paul Eggert (2006-03-22): 1770158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1771158421Swollman# been like Vancouver. 177258787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 177367578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 177417200Swollman 17752742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17762742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 17772742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 1778121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1779121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 17802742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 17812742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 17822742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 17832742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1784158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 17852742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17862742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1787158421Swollman -8:00 Vanc P%sT 1987 1788158421Swollman -8:00 Canada P%sT 178917200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 179017200Swollman -8:00 Canada P%sT 1947 179117200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 179217200Swollman -7:00 - MST 17932742Swollman 17948029Swollman 179558787Sru# Northwest Territories, Nunavut, Yukon 179617200Swollman 1797158421Swollman# From Paul Eggert (2006-03-22): 179817200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1799149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 180020094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 180120094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 180220094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 180320094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 180420094Swollman# * O.I.C. 1980/02 established DST. 180520094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1806158421Swollman# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1807158421Swollman# with Englander. 1808163302Sru# From Chris Walton (2006-06-26): 1809163302Sru# Here is a link to the old daylight saving portion of the interpretation 1810163302Sru# act which was last updated in 1987: 1811163302Sru# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 181217200Swollman 181358787Sru# From Rives McDow (1999-09-04): 181458787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 181558787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 181658787Sru# Nunavut moves to single time zone Oct. 31 181758787Sru# </a> 181858787Sru# 181958787Sru# From Antoine Leca (1999-09-06): 182058787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 182158787Sru# to differentiate it from the Yellowknife region. 182258787Sru 182358787Sru# From Paul Eggert (1999-09-20): 182458787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 182558787Sru# Basic Facts: The New Territory 182686222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 182758787Sru# and that Coral Harbour does not observe DST. We don't know when 182886222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 182958787Sru 183058787Sru# From Rives McDow (1999-11-08): 183158787Sru# On October 31, when the rest of Nunavut went to Central time, 183258787Sru# Pangnirtung wobbled. Here is the result of their wobble: 183358787Sru# 183458787Sru# The following businesses and organizations in Pangnirtung use Central Time: 183558787Sru# 183658787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 183758787Sru# Eastern Arctic National Parks, A & D Specialist 183858787Sru# 183958787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 184058787Sru# 184158787Sru# Hamlet office, All other businesses, Both schools, Airport operator 184258787Sru# 184358787Sru# This has made for an interesting situation there, which warranted the news. 184458787Sru# No one there that I spoke with seems concerned, or has plans to 184558787Sru# change the local methods of keeping time, as it evidently does not 184658787Sru# really interfere with any activities or make things difficult locally. 184758787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 184858787Sru# so it appears that the situation will last at least that long. 184958787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 185058787Sru# their senses", but the locals evidently don't see any problem with 185158787Sru# the current state of affairs. 185258787Sru 185358787Sru# From Michaela Rodrigue, writing in the 185458787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 185558787Sru# Nunatsiaq News (1999-11-19)</a>: 185658787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 185758787Sru# central - or Nunavut time - for government offices, and eastern time 185858787Sru# for municipal offices and schools.... Igloolik [was similar but then] 185958787Sru# made the switch to central time on Saturday, Nov. 6. 186058787Sru 186167578Swollman# From Paul Eggert (2000-10-02): 186267578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 186367578Swollman# for these potential new Zones. 186475267Swollman# 186567578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 186667578Swollman# handful of residents at the Eureka weather station [in the Central 186767578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 186867578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 186967578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 187067578Swollman# Central Time and Southampton Island [in the Central zone] is not 187167578Swollman# required to use daylight savings. 187267578Swollman 187375267Swollman# From 187475267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 187575267Swollman# Nunavut now has two time zones 187675267Swollman# </a> (2000-11-10): 187775267Swollman# The Nunavut government would allow its employees in Kugluktuk and 187875267Swollman# Cambridge Bay to operate on central time year-round, putting them 187975267Swollman# one hour behind the rest of Nunavut for six months during the winter. 188075267Swollman# At the end of October the two communities had rebelled against 188175267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 188275267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 188375267Swollman# central time, while Kugluktuk, even farther west, reverted to 188475267Swollman# mountain time, which they had used before the advent of Nunavut's 188575267Swollman# unified time zone in 1999. 188675267Swollman# 188775267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 188875267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 188975267Swollman 189075267Swollman# From Paul Eggert (2000-12-04): 189175267Swollman# Let's just keep track of the official times for now. 189275267Swollman 189375267Swollman# From Rives McDow (2001-03-07): 189475267Swollman# The premier of Nunavut has issued a ministerial statement advising 189575267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 189675267Swollman# back to three time zones (mountain, central, and eastern). Of the 189775267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 189875267Swollman# has said it will not observe dst, staying on EST year round. I'm 189975267Swollman# checking for more info, and will get back to you if I come up with 190075267Swollman# more. 190175267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 190275267Swollman 1903149514Swollman# From Gwillim Law (2005-05-21): 1904149514Swollman# According to maps at 1905149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1906149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1907149514Swollman# (both dated 2003), and 1908149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1909149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 1910149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1911149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 1912149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 1913149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 1914149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1915149514Swollman# 1916149514Swollman# From Paul Eggert (2005-07-26): 1917149514Swollman# For lack of better information, assume that Southampton Island observed 1918149514Swollman# daylight saving only during wartime. 1919149514Swollman 1920169811Swollman# From Chris Walton (2007-03-01): 1921169811Swollman# ... the community of Resolute (located on Cornwallis Island in 1922169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 1923169811Swollman# Basically the community did not change its clocks at the end of 1924169811Swollman# daylight saving.... 1925169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 1926163302Sru 1927169811Swollman# From Chris Walton (2007-03-14): 1928169811Swollman# Today I phoned the "hamlet office" to find out what Resolute was doing with 1929169811Swollman# its clocks. 1930169811Swollman# 1931169811Swollman# The individual that answered the phone confirmed that the clocks did not 1932169811Swollman# move at the end of daylight saving on October 29/2006. He also told me that 1933169811Swollman# the clocks did not move this past weekend (March 11/2007).... 1934169811Swollman 1935187588Sedwin# From Chris Walton (2008-11-13): 1936187588Sedwin# ...the residents of Resolute believe that they are changing "time zones" 1937187588Sedwin# twice a year. In winter months, local time is qualified with "Eastern 1938187588Sedwin# Time" which is really "Eastern Standard Time (UTC-5)". In summer 1939187588Sedwin# months, local time is qualified with "Central Time" which is really 1940187588Sedwin# "Central Daylight Time (UTC-5)"... 1941187588Sedwin 19422742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 194317200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 194417200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 194517200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 194617200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 1947121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1948121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 194917200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 195017200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 195117200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 195217200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 1953158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 1954158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 19552742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1956169811Swollman# aka Panniqtuuq 1957169811SwollmanZone America/Pangnirtung 0 - zzz 1921 # trading post est. 195858787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 195958787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 196075267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 196175267Swollman -5:00 Canada E%sT 1962169811Swollman# formerly Frobisher Bay 1963169811SwollmanZone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 196458787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 196575267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 196675267Swollman -5:00 Canada E%sT 1967169811Swollman# aka Qausuittuq 1968187588Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1969187588SedwinRule Resolute 2006 max - Nov Sun>=1 2:00 0 ES 1970187588SedwinRule Resolute 2007 max - Mar Sun>=8 2:00 0 CD 1971169811SwollmanZone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 197275267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 197375267Swollman -5:00 - EST 2001 Apr 1 3:00 1974169811Swollman -6:00 Canada C%sT 2006 Oct 29 2:00 1975187588Sedwin -5:00 Resolute %sT 1976169811Swollman# aka Kangiqiniq 1977169811SwollmanZone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 1978169811Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 1979169811Swollman -5:00 - EST 2001 Apr 1 3:00 198058787Sru -6:00 Canada C%sT 1981169811Swollman# aka Iqaluktuuttiaq 1982169811SwollmanZone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 198358787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 198475267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 198575267Swollman -5:00 - EST 2000 Nov 5 0:00 198675267Swollman -6:00 - CST 2001 Apr 1 3:00 198775267Swollman -7:00 Canada M%sT 1988169811SwollmanZone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 1989158421Swollman -7:00 NT_YK M%sT 1980 1990158421Swollman -7:00 Canada M%sT 1991169811SwollmanZone America/Inuvik 0 - zzz 1953 # Inuvik founded 199217200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 1993158421Swollman -7:00 NT_YK M%sT 1980 1994158421Swollman -7:00 Canada M%sT 19952742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 199617200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 1997158421Swollman -8:00 NT_YK P%sT 1980 1998158421Swollman -8:00 Canada P%sT 199917200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 200020094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2001158421Swollman -8:00 NT_YK P%sT 1980 2002158421Swollman -8:00 Canada P%sT 20032742Swollman 20048029Swollman 20052742Swollman############################################################################### 20062742Swollman 20072742Swollman# Mexico 20082742Swollman 200975267Swollman# From Paul Eggert (2001-03-05): 201075267Swollman# The Investigation and Analysis Service of the 201175267Swollman# Mexican Library of Congress (MLoC) has published a 201275267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 201375267Swollman# history of Mexican local time (in Spanish) 201475267Swollman# </a>. 20152742Swollman# 2016158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 201775267Swollman# (In all cases we go with the MLoC.) 2018158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 2019158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 2020158421Swollman# S&P report no DST during summer 1931. 2021158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 20222742Swollman 202375267Swollman# From Gwillim Law (2001-02-20): 202475267Swollman# There are some other discrepancies between the Decrees page and the 202575267Swollman# tz database. I think they can best be explained by supposing that 202675267Swollman# the researchers who prepared the Decrees page failed to find some of 202775267Swollman# the relevant documents. 202875267Swollman 2029149514Swollman# From Alan Perry (1996-02-15): 203017200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 203117200Swollman# outlining the timezone changes in Mexico. 203258787Sru# 203317200Swollman# ------------- Begin Forwarded Message ------------- 203458787Sru# 203517200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 203617200Swollman# rules for the DST changes. The rules are: 203758787Sru# 203817200Swollman# 1. The country is divided in 3 timezones: 203917200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 204017200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 204117200Swollman# - The rest of the country (the Mexico/General TZ) 204258787Sru# 204317200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 204417200Swollman# at 2:00 AM, the times in each zone are as follows: 204517200Swollman# BajaNorte: GMT+7 204617200Swollman# BajaSur: GMT+6 204717200Swollman# General: GMT+5 204858787Sru# 204917200Swollman# 3. The rest of the year, the times are as follows: 205017200Swollman# BajaNorte: GMT+8 205117200Swollman# BajaSur: GMT+7 205217200Swollman# General: GMT+6 205358787Sru# 205417200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 205558787Sru# 205617200Swollman# -------------- End Forwarded Message -------------- 205717200Swollman# From Paul Eggert (1996-06-12): 205843014Swollman# For an English translation of the decree, see 205943014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 206043014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 206143014Swollman# </a> 206214343Swollman 206343543Swollman# From Rives McDow (1998-10-08): 206443543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 206543543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 206643543Swollman 206758787Sru# From Rives McDow (2000-01-10): 206858787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 206958787Sru# zone 5 hours from the International Date Line, and will not observe daylight 207058787Sru# savings time so as to stay on the same time zone as the southern part of 207158787Sru# Arizona year round. 207258787Sru 207375267Swollman# From Jesper Norgaard, translating 207475267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 207575267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 207675267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 207775267Swollman# year, so that the more than 10,000 schools work at normal hour the 207875267Swollman# whole year. 207975267Swollman 208075267Swollman# From Gwillim Law (2001-01-19): 208175267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 208275267Swollman# (translated):... 208375267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 208475267Swollman# that Summer Time will be reduced from seven to five months, starting 208575267Swollman# this year.... 208675267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 208775267Swollman# [translated], says "summer time will ... take effect on the first Sunday 208875267Swollman# in May, and end on the last Sunday of September. 208975267Swollman 209075267Swollman# From Arthur David Olson (2001-01-25): 209175267Swollman# The 2001-01-24 traditional Washington Post contained the page one 209275267Swollman# story "Timely Issue Divides Mexicans."... 209375267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 209475267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 209575267Swollman# Mexico City and its 20 million residents on a different time than 209675267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 209775267Swollman# observation of Daylight Saving Time. 209875267Swollman 209975267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 210075267Swollman# Official statute published by the Energy Department 210175267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 210275267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 210375267Swollman 210475267Swollman# From Paul Eggert (2001-03-03): 210575267Swollman# 210675267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 210775267Swollman# James F. Smith writes in today's LA Times 210875267Swollman# </a> 210975267Swollman# * Sonora will continue to observe standard time. 211075267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 211175267Swollman# the Federal District will not adopt DST. 211275267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 211375267Swollman# * The decree does not affect federal-controlled facilities including 211475267Swollman# the airport, banks, hospitals, and schools. 211575267Swollman# 211675267Swollman# For now we'll assume that the Federal District will bow to federal rules. 211775267Swollman 211875267Swollman# From Jesper Norgaard (2001-04-01): 211975267Swollman# I found some references to the Mexican application of daylight 212075267Swollman# saving, which modifies what I had already sent you, stating earlier 212175267Swollman# that a number of northern Mexican states would go on daylight 212275267Swollman# saving. The modification reverts this to only cover Baja California 212375267Swollman# (Norte), while all other states (except Sonora, who has no daylight 212475267Swollman# saving all year) will follow the original decree of president 212575267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 212675267Swollman# September 30, 2001. 212775267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 212875267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 212975267Swollman 213086222Swollman# From Reuters (2001-09-04): 213186222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 213286222Swollman# unconstitutional in Mexico City, creating the possibility the 213386222Swollman# capital will be in a different time zone from the rest of the nation 213486222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 213586222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 213686222Swollman# standard time. "This is so residents of the Federal District are not 213786222Swollman# subject to unexpected time changes," a statement from the court said. 213886222Swollman 213993799Swollman# From Jesper Norgaard Welen (2002-03-12): 214093799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 214193799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 214293799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 214393799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 214493799Swollman 2145203019Sedwin# From Steffen Thorsen (2009-12-28): 2146203019Sedwin# 2147203019Sedwin# Steffen Thorsen wrote: 2148203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2149203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2150203019Sedwin# > the United States. 2151203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2152203019Sedwin# 2010, some border regions will be the same: 2153203019Sedwin# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2154203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2155203019Sedwin# </a> 2156203019Sedwin# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2157203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2158203019Sedwin# </a> 2159203019Sedwin# (Spanish) 2160203019Sedwin# 2161203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2162203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2163203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2164203019Sedwin# </a> 2165203019Sedwin# (Gaceta Parlamentaria) 2166203019Sedwin# 2167203019Sedwin# There is also a list of the votes here: 2168203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2169203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2170203019Sedwin# </a> 2171203019Sedwin# 2172203019Sedwin# Our page: 2173203019Sedwin# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2174203019Sedwin# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2175203019Sedwin# </a> 2176203019Sedwin 2177203019Sedwin# From Arthur David Olson (2010-01-20): 2178203019Sedwin# The page 2179203019Sedwin# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2180203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2181203019Sedwin# </a> 2182203019Sedwin# includes this text: 2183203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2184203019Sedwin# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2185203019Sedwin# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2186203019Sedwin# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2187203019Sedwin# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2188203019Sedwin# horas del primer domingo de noviembre. 2189203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2190203019Sedwin# fronteriza norte en el territorio comprendido entre la línea 2191203019Sedwin# internacional y la línea paralela ubicada a una distancia de veinte 2192203019Sedwin# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2193203019Sedwin# interior del país, la aplicación de este horario estacional surtirá 2194203019Sedwin# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2195203019Sedwin# las dos horas del primer domingo de noviembre. 2196203019Sedwin 21972742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 21982742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 21992742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 22002742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 22012742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2202121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 22032742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 22042742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 22052742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 220675267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 220775267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 220893799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 220993799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 221093799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 221193799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 22122742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 221343014Swollman# Quintana Roo 221458787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 221575267Swollman -6:00 - CST 1981 Dec 23 221643543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 221743543Swollman -6:00 Mexico C%sT 221864499Swollman# Campeche, Yucatan 221964499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 222075267Swollman -6:00 - CST 1981 Dec 23 222164499Swollman -5:00 - EST 1982 Dec 2 222264499Swollman -6:00 Mexico C%sT 2223203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2224203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2225203019Sedwin -6:00 - CST 1988 2226203019Sedwin -6:00 US C%sT 1989 2227203019Sedwin -6:00 Mexico C%sT 2010 2228203019Sedwin -6:00 US C%sT 2229203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 223075267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 223164499Swollman -6:00 - CST 1988 223264499Swollman -6:00 US C%sT 1989 223364499Swollman -6:00 Mexico C%sT 223443014Swollman# Central Mexico 2235203019SedwinZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 22362742Swollman -7:00 - MST 1927 Jun 10 23:00 22372742Swollman -6:00 - CST 1930 Nov 15 22382742Swollman -7:00 - MST 1931 May 1 23:00 22392742Swollman -6:00 - CST 1931 Oct 224075267Swollman -7:00 - MST 1932 Apr 1 224186222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 224293799Swollman -6:00 - CST 2002 Feb 20 224393799Swollman -6:00 Mexico C%sT 2244203019Sedwin# Chihuahua (near US border) 2245203019SedwinZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2246203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2247203019Sedwin -6:00 - CST 1930 Nov 15 2248203019Sedwin -7:00 - MST 1931 May 1 23:00 2249203019Sedwin -6:00 - CST 1931 Oct 2250203019Sedwin -7:00 - MST 1932 Apr 1 2251203019Sedwin -6:00 - CST 1996 2252203019Sedwin -6:00 Mexico C%sT 1998 2253203019Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 2254203019Sedwin -7:00 Mexico M%sT 2010 2255203019Sedwin -7:00 US M%sT 2256203019Sedwin# Chihuahua (away from US border) 225758787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 225843014Swollman -7:00 - MST 1927 Jun 10 23:00 225943014Swollman -6:00 - CST 1930 Nov 15 226043014Swollman -7:00 - MST 1931 May 1 23:00 226143014Swollman -6:00 - CST 1931 Oct 226275267Swollman -7:00 - MST 1932 Apr 1 226343014Swollman -6:00 - CST 1996 226443014Swollman -6:00 Mexico C%sT 1998 226543014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 226643014Swollman -7:00 Mexico M%sT 226758787Sru# Sonora 226858787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 226958787Sru -7:00 - MST 1927 Jun 10 23:00 227058787Sru -6:00 - CST 1930 Nov 15 227158787Sru -7:00 - MST 1931 May 1 23:00 227258787Sru -6:00 - CST 1931 Oct 227375267Swollman -7:00 - MST 1932 Apr 1 227464499Swollman -6:00 - CST 1942 Apr 24 227558787Sru -7:00 - MST 1949 Jan 14 227658787Sru -8:00 - PST 1970 227758787Sru -7:00 Mexico M%sT 1999 227858787Sru -7:00 - MST 2279207898Sedwin 2280207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2281207898Sedwin# According to news, Bahía de Banderas (Mexican state of Nayarit) 2282207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2283207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2284207898Sedwin# 2285207898Sedwin# (Spanish) 2286207898Sedwin# Bahía de Banderas homologa su horario al del centro del 2287207898Sedwin# país, a partir de este domingo 2288207898Sedwin# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2289207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2290207898Sedwin# </a> 2291207898Sedwin# 2292207898Sedwin# Bahía de Banderas homologa su horario con el del Centro del 2293207898Sedwin# País 2294207898Sedwin# <a href="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"> 2295207898Sedwin# 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" 2296207898Sedwin# </a> 2297207898Sedwin# 2298207898Sedwin# (English) 2299207898Sedwin# Puerto Vallarta and Bahía de Banderas: One Time Zone 2300207898Sedwin# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2301207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2302207898Sedwin# </a> 2303207898Sedwin# 2304207898Sedwin# or 2305207898Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2306207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2307207898Sedwin# </a> 2308207898Sedwin# 2309207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2310207898Sedwin# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2311207898Sedwin# zone ..." 231264499Swollman# Baja California Sur, Nayarit, Sinaloa 2313207898Sedwin 2314207898Sedwin# From Arthur David Olson (2010-05-01): 2315207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2316207898Sedwin 23172742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 23182742Swollman -7:00 - MST 1927 Jun 10 23:00 23192742Swollman -6:00 - CST 1930 Nov 15 23202742Swollman -7:00 - MST 1931 May 1 23:00 23212742Swollman -6:00 - CST 1931 Oct 232275267Swollman -7:00 - MST 1932 Apr 1 232364499Swollman -6:00 - CST 1942 Apr 24 23242742Swollman -7:00 - MST 1949 Jan 14 23252742Swollman -8:00 - PST 1970 232614343Swollman -7:00 Mexico M%sT 2327207898Sedwin 2328207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2329207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2330207898Sedwin -6:00 - CST 1930 Nov 15 2331207898Sedwin -7:00 - MST 1931 May 1 23:00 2332207898Sedwin -6:00 - CST 1931 Oct 2333207898Sedwin -7:00 - MST 1932 Apr 1 2334207898Sedwin -6:00 - CST 1942 Apr 24 2335207898Sedwin -7:00 - MST 1949 Jan 14 2336207898Sedwin -8:00 - PST 1970 2337210718Sedwin -7:00 Mexico M%sT 2010 Apr 4 2:00 2338207898Sedwin -6:00 Mexico C%sT 2339207898Sedwin 2340203019Sedwin# Baja California (near US border) 23412742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 234275267Swollman -7:00 - MST 1924 23432742Swollman -8:00 - PST 1927 Jun 10 23:00 234475267Swollman -7:00 - MST 1930 Nov 15 234575267Swollman -8:00 - PST 1931 Apr 1 234675267Swollman -8:00 1:00 PDT 1931 Sep 30 234764499Swollman -8:00 - PST 1942 Apr 24 2348158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2349158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 235075267Swollman -8:00 - PST 1948 Apr 5 235175267Swollman -8:00 1:00 PDT 1949 Jan 14 235275267Swollman -8:00 - PST 1954 235375267Swollman -8:00 CA P%sT 1961 235475267Swollman -8:00 - PST 1976 235514343Swollman -8:00 US P%sT 1996 235675267Swollman -8:00 Mexico P%sT 2001 235793799Swollman -8:00 US P%sT 2002 Feb 20 2358203019Sedwin -8:00 Mexico P%sT 2010 2359203019Sedwin -8:00 US P%sT 2360203019Sedwin# Baja California (away from US border) 2361203019SedwinZone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2362203019Sedwin -7:00 - MST 1924 2363203019Sedwin -8:00 - PST 1927 Jun 10 23:00 2364203019Sedwin -7:00 - MST 1930 Nov 15 2365203019Sedwin -8:00 - PST 1931 Apr 1 2366203019Sedwin -8:00 1:00 PDT 1931 Sep 30 2367203019Sedwin -8:00 - PST 1942 Apr 24 2368203019Sedwin -8:00 1:00 PWT 1945 Aug 14 23:00u 2369203019Sedwin -8:00 1:00 PPT 1945 Nov 12 # Peace 2370203019Sedwin -8:00 - PST 1948 Apr 5 2371203019Sedwin -8:00 1:00 PDT 1949 Jan 14 2372203019Sedwin -8:00 - PST 1954 2373203019Sedwin -8:00 CA P%sT 1961 2374203019Sedwin -8:00 - PST 1976 2375203019Sedwin -8:00 US P%sT 1996 2376203019Sedwin -8:00 Mexico P%sT 2001 2377203019Sedwin -8:00 US P%sT 2002 Feb 20 237893799Swollman -8:00 Mexico P%sT 2379158421Swollman# From Paul Eggert (2006-03-22): 238075267Swollman# Formerly there was an America/Ensenada zone, which differed from 238175267Swollman# America/Tijuana only in that it did not observe DST from 1976 2382158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2383158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 238475267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2385158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 238675267Swollman# DST-observance was a town-by-town matter back then. This concerns 238775267Swollman# data after 1970 so most likely there should be at least one Zone 238875267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 238975267Swollman# name or contents should be. 23902742Swollman# 23912742Swollman# Revillagigedo Is 23922742Swollman# no information 23932742Swollman 23942742Swollman############################################################################### 23952742Swollman 23962742Swollman# Anguilla 23972742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23982742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 23992742Swollman -4:00 - AST 24002742Swollman 24012742Swollman# Antigua and Barbuda 24022742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24032742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 24042742Swollman -5:00 - EST 1951 24052742Swollman -4:00 - AST 24062742Swollman 24072742Swollman# Bahamas 2408169811Swollman# 2409169811Swollman# From Sue Williams (2006-12-07): 2410169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2411169811Swollman# rules to sync with the U.S. starting in 2007.... 2412169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2413169811Swollman 24142742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2415181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2416181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 24172742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24182742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 2419169811Swollman -5:00 Bahamas E%sT 1976 2420169811Swollman -5:00 US E%sT 24212742Swollman 24222742Swollman# Barbados 24232742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 24242742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 24252742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 24262742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 24272742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 24282742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 24292742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24302742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 243143014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 24322742Swollman -4:00 Barb A%sT 24332742Swollman 24342742Swollman# Belize 2435158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 24362742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 24372742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 24382742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 24392742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 24402742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 24412742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 24422742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 24432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24442742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 24452742Swollman -6:00 Belize C%sT 24462742Swollman 24472742Swollman# Bermuda 2448163302Sru 2449163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2450163302Sru 2451163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2452163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2453163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2454163302Sru# Friday, the same thing will happen in Bermuda. 2455163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2456163302Sru 24572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24582742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 24592742Swollman -4:00 - AST 1974 Apr 28 2:00 2460163302Sru -4:00 Bahamas A%sT 1976 2461163302Sru -4:00 US A%sT 24622742Swollman 24632742Swollman# Cayman Is 24642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24652742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 246643014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 24672742Swollman -5:00 - EST 24682742Swollman 24692742Swollman# Costa Rica 24702742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 24712742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 24722742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 247320094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2474158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2475158421Swollman# go with Shanks & Pottenger. 247620094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 247720094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 24782742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 24792742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24802742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 248158787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 24822742Swollman -6:00 CR C%sT 24832742Swollman# Coco 24842742Swollman# no information; probably like America/Costa_Rica 24852742Swollman 24862742Swollman# Cuba 24872742Swollman 248858787Sru# From Arthur David Olson (1999-03-29): 248958787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 249058787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 249158787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 249258787Sru# During the game, play-by-play announcer Jim Hunter noted that 249358787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 249458787Sru# Time today." (The "two hour" remark referred to losing one hour of 249558787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 249658787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 249758787Sru# returned to Baltimore, which switches on that date.) 24982742Swollman 2499138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2500138323Swollman# Cuba is not going back to standard time this year. 2501158421Swollman# From Paul Eggert (2006-03-22): 2502138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2503138323Swollman# says that it's due to a problem at the Antonio Guiteras 2504138323Swollman# thermoelectric plant, and says "This October there will be no return 2505138323Swollman# to normal hours (after daylight saving time)". 2506158421Swollman# For now, let's assume that it's a temporary measure. 2507138323Swollman 2508153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2509153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2510153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2511153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2512153670Swollman 2513169811Swollman# From Jesper Norgaard Welen (2006-10-21): 2514169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2515169811Swollman# the 3 years of permanent DST next weekend, see 2516169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2517169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2518169811Swollman# watches should be set back one hour -- going back to 00:00 hours -- returning 2519169811Swollman# to the normal schedule.... 2520163302Sru 2521169811Swollman# From Paul Eggert (2007-03-02): 2522169811Swollman# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2523169811Swollman# says Cuban clocks will advance at midnight on March 10. 2524169811Swollman# For lack of better information, assume Cuba will use US rules, 2525169811Swollman# except that it switches at midnight standard time as usual. 2526173319Sedwin# 2527173319Sedwin# From Steffen Thorsen (2007-10-25): 2528173319Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2529173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2530173319Sedwin# 2531173319Sedwin# He supplied these references: 2532173319Sedwin# 2533173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2534173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2535173319Sedwin# 2536173319Sedwin# From Alex Kryvenishev (2007-10-25): 2537173319Sedwin# Here is also article from Granma (Cuba): 2538173319Sedwin# 2539173319Sedwin# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2540173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2541173319Sedwin# 2542173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2543169811Swollman 2544177591Sedwin# From Arthur David Olson (2008-03-09): 2545177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2546177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2547177591Sedwin# <a href="http://media.enet.cu/radioreloj"> 2548177591Sedwin# http://media.enet.cu/radioreloj 2549177591Sedwin# </a>, a Cuban information station, and heard 2550177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2551177591Sedwin# indicating that Cuba is still on standard time. 2552177591Sedwin 2553177591Sedwin# From Steffen Thorsen (2008-03-12): 2554177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2555177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2556177591Sedwin# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2557177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2558177591Sedwin# </a> 2559177591Sedwin# 2560177591Sedwin# Some more background information is posted here: 2561177591Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2562177591Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2563177591Sedwin# </a> 2564177591Sedwin# 2565177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2566177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2567177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2568177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2569177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2570177591Sedwin# change some historic records as well. 2571177591Sedwin# 2572177591Sedwin# One example: 2573177591Sedwin# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2574177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2575177591Sedwin# </a> 2576177591Sedwin 2577177591Sedwin# From Jesper Norgaard Welen (2008-03-13): 2578177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2579177591Sedwin# web site, the Granma. Please check out 2580177591Sedwin# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2581177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2582177591Sedwin# </a> 2583177591Sedwin# 2584177591Sedwin# Basically as expected after Steffen Thorsens information, the change 2585177591Sedwin# will take place midnight between Saturday and Sunday. 2586177591Sedwin 2587177591Sedwin# From Arthur David Olson (2008-03-12): 2588177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2589177591Sedwin 2590189923Sedwin# From Alexander Krivenyshev (2009-03-04) 2591189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2592189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2593189923Sedwin# not on midnight March 14 / March 15 as previously thought. 2594189923Sedwin# 2595189923Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2596189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2597189923Sedwin# (in Spanish) 2598189923Sedwin# </a> 2599189923Sedwin 2600189923Sedwin# From Arthur David Olson (2009-03-09) 2601189923Sedwin# I listened over the Internet to 2602189923Sedwin# <a href="http://media.enet.cu/readioreloj"> 2603189923Sedwin# http://media.enet.cu/readioreloj 2604189923Sedwin# </a> 2605189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2606189923Sedwin# the time was announced as "diez cinco"--the same time as here, indicating 2607189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2608189923Sedwin 2609219687Sedwin# From Steffen Thorsen (2011-03-08): 2610219687Sedwin# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2611219687Sedwin# this year. Nothing about the end date known so far (if that has 2612219687Sedwin# changed at all). 2613219687Sedwin# 2614219687Sedwin# Source: 2615219687Sedwin# <a href="http://granma.co.cu/2011/03/08/nacional/artic01.html"> 2616219687Sedwin# http://granma.co.cu/2011/03/08/nacional/artic01.html 2617219687Sedwin# </a> 2618219687Sedwin# 2619219687Sedwin# Our info: 2620219687Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html"> 2621219687Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2622219687Sedwin# </a> 2623219687Sedwin 26242742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26252742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 26262742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 26272742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 26282742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 26292742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 26302742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 26312742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 26322742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 26332742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 26342742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 26352742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 26362742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 26372742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 26382742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 26392742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 26402742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 26412742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 26422742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 264330711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 26442742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 26452742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 26462742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 264743014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 264820094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 264943014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 265043014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 265158787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2652138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2653187588SedwinRule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D 2654173319SedwinRule Cuba 2006 max - Oct lastSun 0:00s 0 S 2655177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2656189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2657219687SedwinRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2658219687SedwinRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2659219687SedwinRule Cuba 2012 max - Mar Sun>=8 0:00s 1:00 D 26602742Swollman 26612742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26622742SwollmanZone America/Havana -5:29:28 - LMT 1890 266358787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 26642742Swollman -5:00 Cuba C%sT 26652742Swollman 26662742Swollman# Dominica 26672742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26682742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 26692742Swollman -4:00 - AST 26702742Swollman 26712742Swollman# Dominican Republic 267275267Swollman 267375267Swollman# From Steffen Thorsen (2000-10-30): 267475267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 267575267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 267675267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 267775267Swollman 267875267Swollman# From Paul Eggert (2000-12-04): 267975267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 268075267Swollman 268175267Swollman# From Rives McDow (2000-12-01): 268275267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 268375267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 268475267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 268575267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 268675267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 268775267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 268875267Swollman# decided to revert. 268975267Swollman 269075267Swollman 26912742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26922742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 26932742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 26942742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 26952742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 26962742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 26972742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 26982742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26992742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 27002742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 27012742Swollman -5:00 DR E%sT 1974 Oct 27 270275267Swollman -4:00 - AST 2000 Oct 29 02:00 270375267Swollman -5:00 US E%sT 2000 Dec 3 01:00 27042742Swollman -4:00 - AST 27052742Swollman 27062742Swollman# El Salvador 2707158421Swollman 27082742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 27092742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 27102742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 2711121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 2712121098Swollman# instead of America/San_Salvador. 27132742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27142742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 27152742Swollman -6:00 Salv C%sT 27162742Swollman 27172742Swollman# Grenada 27182742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 271919878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 27202742Swollman -4:00 - AST 27212742Swollman 27222742Swollman# Guadeloupe 27232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27242742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 27252742Swollman -4:00 - AST 2726174242Sedwin# St Barthelemy 2727174242SedwinLink America/Guadeloupe America/St_Barthelemy 2728174242Sedwin# St Martin (French part) 2729174242SedwinLink America/Guadeloupe America/Marigot 27302742Swollman 27312742Swollman# Guatemala 2732158421Swollman# 2733158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2734158421Swollman# Diario Co Latino, at 2735158421Swollman# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2736158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 2737158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 2738158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 2739158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2740163302Sru# From Paul Eggert (2006-06-22): 2741163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 2742163302Sru# (2006-04-19), says DST ends at 24:00. See 2743163302Sru# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2744163302Sru 27452742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 27462742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 27472742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 27482742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 27492742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 275020094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 275120094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 2752158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 2753158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 27542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27552742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 27562742Swollman -6:00 Guat C%sT 27572742Swollman 27582742Swollman# Haiti 2759149514Swollman# From Gwillim Law (2005-04-15): 2760149514Swollman# Risto O. Nykanen wrote me that Haiti is now on DST. 2761149514Swollman# I searched for confirmation, and I found a 2762149514Swollman# <a href="http://www.haitianconsulate.org/time.doc"> press release 2763149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2764149514Swollman# </a>. Translated from French, it says: 2765149514Swollman# 2766149514Swollman# "The Prime Minister's Communication Office notifies the public in general 2767149514Swollman# and the press in particular that, following a decision of the Interior 2768149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 2769149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 2770149514Swollman# Saturday the 2nd to Sunday the 3rd. 2771149514Swollman# 2772149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 2773149514Swollman# the population that the country's clocks will be set forward one hour 2774149514Swollman# starting at midnight. This provision will hold until the last Saturday in 2775149514Swollman# October 2005. 2776149514Swollman# 2777149514Swollman# "Port-au-Prince, March 31, 2005" 2778158421Swollman# 2779158421Swollman# From Steffen Thorsen (2006-04-04): 2780158421Swollman# I have been informed by users that Haiti observes DST this year like 2781158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 2782158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 2783158421Swollman# next year or if they will extend their DST like US/Canada next year). 2784158421Swollman# 2785158421Swollman# I have found this article about it (in French): 2786158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2787158421Swollman# 2788158421Swollman# The reason seems to be an energy crisis. 2789149514Swollman 2790169811Swollman# From Stephen Colebourne (2007-02-22): 2791169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 2792158421Swollman 2793169811Swollman 27942742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 27952742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 27962742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 27972742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2798158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2799158421Swollman# Go with IATA. 280043014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 280143014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2802169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2803169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 28042742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28052742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 28062742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 28072742Swollman -5:00 Haiti E%sT 28082742Swollman 28092742Swollman# Honduras 2810158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2811158421Swollman 2812158421Swollman# From Paul Eggert (2006-05-05): 2813158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2814158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 2815158421Swollman# months until September. La Tribuna reported today 2816158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2817163302Sru# of Honduras, refused to back down on this. 2818158421Swollman 2819163302Sru# From Jesper Norgaard Welen (2006-08-08): 2820163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 2821163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 2822163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2823163302Sru 2824163302Sru# From Paul Eggert (2006-08-08): 2825163302Sru# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 2826163302Sru# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 2827163302Sru# It mentions executive decree 18-2006. 2828163302Sru 2829163302Sru# From Steffen Thorsen (2006-08-17): 2830163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 2831163302Sru# published, I have located this authoritative source: 2832163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 2833163302Sru 2834169811Swollman# From Steffen Thorsen (2007-03-30): 2835169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 2836169811Swollman# So it seems that Honduras will not enter DST this year.... 2837169811Swollman 2838158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2839158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2840158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 2841169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 2842169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 28432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28442742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 2845158421Swollman -6:00 Hond C%sT 284643543Swollman# 284743543Swollman# Great Swan I ceded by US to Honduras in 1972 28482742Swollman 28492742Swollman# Jamaica 28502742Swollman 285119878Swollman# From Bob Devine (1988-01-28): 28522742Swollman# Follows US rules. 28532742Swollman 285419878Swollman# From U. S. Naval Observatory (1989-01-19): 28552742Swollman# JAMAICA 5 H BEHIND UTC 28562742Swollman 2857158421Swollman# From Shanks & Pottenger: 28582742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28592742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 286043014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 286158787Sru -5:00 - EST 1974 Apr 28 2:00 286220094Swollman -5:00 US E%sT 1984 286320094Swollman -5:00 - EST 28642742Swollman 28652742Swollman# Martinique 28662742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28672742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 286886222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 28692742Swollman -4:00 - AST 1980 Apr 6 28702742Swollman -4:00 1:00 ADT 1980 Sep 28 28712742Swollman -4:00 - AST 28722742Swollman 28732742Swollman# Montserrat 2874158421Swollman# From Paul Eggert (2006-03-22): 2875158421Swollman# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 2876158421Swollman# world.gazetteer.com says Cork Hill is the most populous location now. 28772742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2878158421SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 28792742Swollman -4:00 - AST 28802742Swollman 28812742Swollman# Nicaragua 288243543Swollman# 2883158421Swollman# This uses Shanks & Pottenger for times before 2005. 288443543Swollman# 2885149514Swollman# From Steffen Thorsen (2005-04-12): 2886149514Swollman# I've got reports from 8 different people that Nicaragua just started 2887149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 2888149514Swollman# expensive petroleum. The exact end date for DST is not yet 2889149514Swollman# announced, only "September" but some sites also say "mid-September". 2890149514Swollman# Some background information is available on the President's official site: 2891149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 2892149514Swollman# The Decree, no 23-2005 is available here: 2893149514Swollman# 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 2894149514Swollman# 2895149514Swollman# From Paul Eggert (2005-05-01): 2896149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 2897158421Swollman# assume that it is daylight saving.... 2898149514Swollman# 2899149514Swollman# From Gwillim Law (2005-04-21): 2900149514Swollman# The Associated Press story on the time change, which can be found at 2901149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 2902149514Swollman# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 2903149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 2904149514Swollman# during the Arnoldo Aleman administration."... 2905149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 2906149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 2907149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 2908149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 2909149514Swollman# 2910153670Swollman# From Jesper Norgaard Welen (2005-11-02): 2911153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 2912153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 2913153670Swollman# (2005-09-26) 2914153670Swollman# 2915158421Swollman# From Jesper Norgaard Welen (2006-05-05): 2916158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 2917158421Swollman# (my informal translation) 2918158421Swollman# By order of the president of the republic, Enrique Bolanos, Nicaragua 2919158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 2920158421Swollman# morning, and will stay that way until 30.th. of september. 2921158421Swollman# 2922163302Sru# From Jesper Norgaard Welen (2006-09-30): 2923163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 2924163302Sru# My informal translation runs: 2925163302Sru# The natural sun time is restored in all the national territory, in that the 2926163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 2927163302Sru# 29282742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29292742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 29302742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 2931149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 2932163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 2933158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 2934163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 29352742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29362742SwollmanZone America/Managua -5:45:08 - LMT 1890 293786222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 29382742Swollman -6:00 - CST 1973 May 29392742Swollman -5:00 - EST 1975 Feb 16 2940158421Swollman -6:00 Nic C%sT 1992 Jan 1 4:00 2941158421Swollman -5:00 - EST 1992 Sep 24 2942158421Swollman -6:00 - CST 1993 2943158421Swollman -5:00 - EST 1997 2944149514Swollman -6:00 Nic C%sT 29452742Swollman 29462742Swollman# Panama 29472742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29482742SwollmanZone America/Panama -5:18:08 - LMT 1890 294986222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 29502742Swollman -5:00 - EST 29512742Swollman 29522742Swollman# Puerto Rico 29532742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 29542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 295514343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 29562742Swollman -4:00 - AST 1942 May 3 2957158421Swollman -4:00 US A%sT 1946 29582742Swollman -4:00 - AST 29592742Swollman 29602742Swollman# St Kitts-Nevis 29612742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29622742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 29632742Swollman -4:00 - AST 29642742Swollman 29652742Swollman# St Lucia 29662742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29672742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 296886222Swollman -4:04:00 - CMT 1912 # Castries Mean Time 29692742Swollman -4:00 - AST 29702742Swollman 29712742Swollman# St Pierre and Miquelon 29722742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 29732742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29742742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 29752742Swollman -4:00 - AST 1980 May 2976121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 2977121098Swollman -3:00 Canada PM%sT 29782742Swollman 29792742Swollman# St Vincent and the Grenadines 29802742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29812742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 298243014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 29832742Swollman -4:00 - AST 29842742Swollman 29852742Swollman# Turks and Caicos 2986169811Swollman# 2987169811Swollman# From Chris Dunn in 2988169811Swollman# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 2989169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 2990169811Swollman# daylight saving dates for time changes have been adjusted to match 2991169811Swollman# the recent U.S. change of dates. 2992169811Swollman# 2993169811Swollman# From Brian Inglis (2007-04-28): 2994169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 2995169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 2996169811Swollman# rows before that there is an out of date entry for Oct: 2997169811Swollman# "Eastern Standard Times Begins 2007 2998169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 2999169811Swollman# indicating that the normal ET rules are followed. 3000169811Swollman# 3001169811Swollman# From Paul Eggert (2006-05-01): 3002158421Swollman# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 3003169811Swollman# says they switch at midnight. Go with Shanks & Pottenger. 3004169811Swollman# 300520094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3006169811SwollmanRule TC 1979 1986 - Apr lastSun 2:00 1:00 D 3007169811SwollmanRule TC 1979 2006 - Oct lastSun 2:00 0 S 3008169811SwollmanRule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 3009169811SwollmanRule TC 2007 max - Mar Sun>=8 2:00 1:00 D 3010169811SwollmanRule TC 2007 max - Nov Sun>=1 2:00 0 S 30112742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30122742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 301343014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 301420094Swollman -5:00 TC E%sT 30158029Swollman 301614343Swollman# British Virgin Is 30172742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 301814343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 30192742Swollman -4:00 - AST 30208029Swollman 302114343Swollman# Virgin Is 302214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 302314343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 302414343Swollman -4:00 - AST 3025