northamerica revision 158421
1158421Swollman# @(#)northamerica 8.6 2153761Swollman# <pre> 3153761Swollman 42742Swollman# also includes Central America and the Caribbean 52742Swollman 62742Swollman# This data is by no means authoritative; if you think you know better, 72742Swollman# go ahead and edit the file (and please send any changes to 82742Swollman# tz@elsie.nci.nih.gov for general use in the future). 92742Swollman 10149514Swollman# From Paul Eggert (1999-03-22): 112742Swollman# A reliable and entertaining source about time zones is 1258787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 132742Swollman 142742Swollman############################################################################### 152742Swollman 162742Swollman# United States 172742Swollman 1858787Sru# From Paul Eggert (1999-03-31): 1958787Sru# Howse writes (pp 121-125) that time zones were invented by 2058787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2158787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 2258787Sru# His pamphlet ``A System of National Time for Railroads'' (1870) 2358787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2458787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2558787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2658787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2758787Sru# and the most of the country soon followed suit. 2858787Sru 29149514Swollman# From Paul Eggert (2005-04-16): 30149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 31149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 32149514Swollman 33158421Swollman# From Paul Eggert (2006-03-22): 3414343Swollman# A good source for time zone historical data in the US is 3514343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3614343Swollman# San Diego: ACS Publications, Inc. (1991). 3714343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 38158421Swollman# It is the source for most of the pre-1991 US entries below. 3914343Swollman 4075267Swollman# From Paul Eggert (2001-03-06): 4117200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 4275267Swollman# in his whimsical essay ``An Economical Project for Diminishing the Cost 4375267Swollman# of Light'' published in the Journal de Paris (1784-04-26). 4417200Swollman# Not everyone is happy with the results: 4517200Swollman# 4617200Swollman# I don't really care how time is reckoned so long as there is some 4717200Swollman# agreement about it, but I object to being told that I am saving 4817200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 4917200Swollman# I even object to the implication that I am wasting something 5017200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 5117200Swollman# of moonlight I resent the bossy insistence of those who want to 5217200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 5317200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 5417200Swollman# to push people into bed earlier, and get them up earlier, to make 5517200Swollman# them healthy, wealthy and wise in spite of themselves. 5617200Swollman# 57149514Swollman# -- Robertson Davies, The diary of Samuel Marchbanks, 58149514Swollman# Clarke, Irwin (1947), XIX, Sunday 5975267Swollman# 6075267Swollman# For more about the first ten years of DST in the United States, see 6175267Swollman# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 6275267Swollman# Ten years of daylight saving from the Pittsburgh standpoint 6375267Swollman# (Carnegie Library of Pittsburgh, 1927)</a>. 6475267Swollman# 6575267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 6675267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6775267Swollman# was the first nationwide legal time standard, and apparently 6875267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 6917200Swollman 702742Swollman# From Arthur David Olson: 712742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 7219878Swollman# See, for example, the front page of the Saturday, 1974-10-26 7319878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 742742Swollman 752742Swollman# From Arthur David Olson: 762742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 772742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 782742Swollman 7967578Swollman# From Arthur David Olson (2000-09-25): 8067578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 8167578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 8267578Swollman# An AltaVista search turned up 8367578Swollman# <a href="http://rowayton.org/rhs/hstaug45.html">: 8467578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 8567578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 8667578Swollman# </a> (August 1945) by way of confirmation. 8767578Swollman 88149514Swollman# From Joseph Gallant citing 8967578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 9067578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 9186222Swollman# to switch to London for Attlee's address, but the American people 9267578Swollman# never got to hear his speech live. According to one press account, 9367578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 9467578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 9567578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 9686222Swollman# London which were to precede Mr. Attlee's speech. 9767578Swollman 98114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 99114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 100114173Swollman# 101114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 102114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 103114173Swollman# wire service teletype machine, which had prescribed signals for major news. 104114173Swollman# Associated Press, for example, would ring five bells before spewing out 105114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 106114173Swollman# importance." 107114173Swollman# 108114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 109114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 110114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 111114173Swollman# The Japanese have agreed to our surrender terms." 112114173Swollman# 113114173Swollman# He had scored a 20-second scoop on other broadcasters. 114114173Swollman 115149590Swollman# From Arthur David Olson (2005-08-22): 116149590Swollman# Paul has been careful to use the "US" rules only in those locations 117149590Swollman# that are part of the United States; this reflects the real scope of 118149590Swollman# U.S. government action. So even though the "US" rules have changed 119149590Swollman# in the latest release, other countries won't be affected. 120149590Swollman 1212742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12275267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1232742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1242742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 12567578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 1262742SwollmanRule US 1945 only - Sep 30 2:00 0 S 127149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1282742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1292742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1302742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1312742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 132149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 133149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 134149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1352742Swollman 136153761Swollman# From Arthur David Olson, 2005-12-19 137153761Swollman# We generate the files specified below to guard against old files with 138153761Swollman# obsolete information being left in the time zone binary directory. 139153761Swollman# We limit the list to names that have appeared in previous versions of 140153761Swollman# this time zone package. 141153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 142153761Swollman# a particular place changes whether it observes DST. 143153761Swollman# We put these specifications here in the northamerica file both to 144153761Swollman# increase the chances that they'll actually get compiled and to 145153761Swollman# avoid the need to duplicate the US rules in another file. 146153761Swollman 147153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 148153761SwollmanZone EST -5:00 - EST 149153761SwollmanZone MST -7:00 - MST 150153761SwollmanZone HST -10:00 - HST 151153761SwollmanZone EST5EDT -5:00 US E%sT 152153761SwollmanZone CST6CDT -6:00 US C%sT 153153761SwollmanZone MST7MDT -7:00 US M%sT 154153761SwollmanZone PST8PDT -8:00 US P%sT 155153761Swollman 15619878Swollman# From Bob Devine (1988-01-28): 1572742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1582742Swollman# old new 1592742Swollman# Pacific Standard Time(PST) -same- 1602742Swollman# Yukon Standard Time(YST) -same- 1612742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1622742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1632742Swollman# 1642742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1652742Swollman# The YST zone now covers nearly all of the state, AHST just part 1662742Swollman# of the Aleutian islands. No DST. 1672742Swollman 16814343Swollman# From Paul Eggert (1995-12-19): 16914343Swollman# The tables below use `NST', not `NT', for Nome Standard Time. 17014343Swollman# I invented `CAWT' for Central Alaska War Time. 17114343Swollman 17219878Swollman# From U. S. Naval Observatory (1989-01-19): 1732742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1742742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1752742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1762742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1772742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1782742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1792742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1802742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1812742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1822742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1832742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 1842742Swollman# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 1852742Swollman# USA HAWAII 10 H BEHIND UTC 1862742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1872742Swollman 18819878Swollman# From Arthur David Olson (1989-01-21): 1892742Swollman# The above dates are for 1988. 1902742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1912742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1922742Swollman# Aleutians. 1932742Swollman 19419878Swollman# From Arthur David Olson (1988-02-13): 1952742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1962742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 19719878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 1982742Swollman# took effect), as explained in sections 263 and 261: 1992742Swollman# (none) 2002742Swollman# United States standard eastern time 2012742Swollman# United States standard mountain time 2022742Swollman# United States standard central time 2032742Swollman# United States standard Pacific time 2042742Swollman# (none) 2052742Swollman# United States standard Alaska time 2062742Swollman# (none) 20719878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2082742Swollman# public law 98-181): 2092742Swollman# Atlantic standard time 2102742Swollman# eastern standard time 2112742Swollman# central standard time 2122742Swollman# mountain standard time 2132742Swollman# Pacific standard time 2142742Swollman# Yukon standard time 2152742Swollman# Alaska-Hawaii standard time 2162742Swollman# Bering standard time 21719878Swollman# And after 1983-11-30: 2182742Swollman# Atlantic standard time 2192742Swollman# eastern standard time 2202742Swollman# central standard time 2212742Swollman# mountain standard time 2222742Swollman# Pacific standard time 2232742Swollman# Alaska standard time 2242742Swollman# Hawaii-Aleutian standard time 2252742Swollman# Samoa standard time 2262742Swollman# The law doesn't give abbreviations. 22714343Swollman# 22875267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 22975267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 23075267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 23175267Swollman# See the file "australasia". 232158421Swollman 233149514Swollman# From Arthur David Olson, 2005-08-09 234149514Swollman# The following was signed into law on 2005-08-08. 235149514Swollman# 236149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 237149514Swollman# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 238149514Swollman# U.S.C. 260a(a)) is amended-- 239149514Swollman# (1) by striking `first Sunday of April' and inserting `second 240149514Swollman# Sunday of March'; and 241149514Swollman# (2) by striking `last Sunday of October' and inserting `first 242149514Swollman# Sunday of November'. 243149514Swollman# (b) Effective Date- Subsection (a) shall take effect 1 year after the 244149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 245149514Swollman# (c) Report to Congress- Not later than 9 months after the effective 246149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 247149514Swollman# on the impact of this section on energy consumption in the United 248149514Swollman# States. 249149514Swollman# (d) Right to Revert- Congress retains the right to revert the 250149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 251149514Swollman# Department study is complete. 2522742Swollman 25386222Swollman# US eastern time, represented by New York 25475267Swollman 25567578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 256149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 257149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 258114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 259114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 260114173Swollman# Vermont, Virginia, West Virginia 26167578Swollman 262149514Swollman# From Dave Cantor (2004-11-02): 263149514Swollman# Early this summer I had the occasion to visit the Mount Washington 264149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 265149514Swollman# One of the staff members said that the station was on Eastern Standard Time 266149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 267149514Swollman# reports will always have times which are 5 hours behind UTC. 268149514Swollman 269153670Swollman# From Paul Eggert (2005-08-26): 270153670Swollman# According to today's Huntsville Times 271153670Swollman# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 272153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 273153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 274153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 275153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 276153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 277158421Swollman# in Columbus." 278153670Swollman 27914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 28014343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 28114343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 28214343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 28314343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 28414343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 28514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 286149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 28714343Swollman -5:00 US E%sT 1920 28814343Swollman -5:00 NYC E%sT 1942 28914343Swollman -5:00 US E%sT 1946 29014343Swollman -5:00 NYC E%sT 1967 29114343Swollman -5:00 US E%sT 2922742Swollman 29386222Swollman# US central time, represented by Chicago 29467578Swollman 295136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 296136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 297136638Swollman# Washington counties), Illinois, western Indiana 298114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 299114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 300114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 301114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 302114173Swollman# western Tennessee, most of Texas, Wisconsin 30367578Swollman 304158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 305158421Swollman# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 306158421Swollman# is currently enforced at the 01:00 time of change. Because the local 307158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 308158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 309158421Swollman# hours" within the deviated hour of this change every year.... 310158421Swollman 31114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 31214343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 31314343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 31414343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 31514343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 31614343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 31714343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 31814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 319149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 32014343Swollman -6:00 US C%sT 1920 32114343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 32214343Swollman -5:00 - EST 1936 Nov 15 2:00 32314343Swollman -6:00 Chicago C%sT 1942 32414343Swollman -6:00 US C%sT 1946 32514343Swollman -6:00 Chicago C%sT 1967 32614343Swollman -6:00 US C%sT 32786222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 328149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 32986222Swollman -7:00 US M%sT 1992 Oct 25 02:00 33086222Swollman -6:00 US C%sT 331158421Swollman# Morton County, ND, switched from mountain to central time on 332158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 333158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 334158421Swollman# Officially this switch also included part of Sioux County, and 335158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 336158421Swollman# but in practice these other counties were already observing central time. 337158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 338158421SwollmanZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 339158421Swollman -7:00 US M%sT 2003 Oct 26 02:00 340158421Swollman -6:00 US C%sT 3412742Swollman 34286222Swollman# US mountain time, represented by Denver 34367578Swollman# 344136638Swollman# Colorado, far western Kansas, Montana, western 34586222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 34686222Swollman# New Mexico, southwestern North Dakota, far eastern Oregon, 34775267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 34875267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 34967578Swollman# 35014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 35114343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 35214343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 35314343SwollmanRule Denver 1921 only - May 22 2:00 0 S 35414343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 35514343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 3562742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 357149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 35815309Swollman -7:00 US M%sT 1920 35915309Swollman -7:00 Denver M%sT 1942 36015309Swollman -7:00 US M%sT 1946 36115309Swollman -7:00 Denver M%sT 1967 36215309Swollman -7:00 US M%sT 3632742Swollman 36414343Swollman# US Pacific time, represented by Los Angeles 36567578Swollman# 366136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 367136638Swollman# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties), 368136638Swollman# most of Nevada, most of Oregon, and Washington 36967578Swollman# 37014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 37114343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 37214343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 37314343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 37414343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 37514343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 37614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 377149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 37814343Swollman -8:00 US P%sT 1946 37914343Swollman -8:00 CA P%sT 1967 38014343Swollman -8:00 US P%sT 3818029Swollman 38214343Swollman# Alaska 38314343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 38414343Swollman# 38586222Swollman# From Paul Eggert (2001-05-30): 38614343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 38719878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 38875267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 38975267Swollman# also a Friday. Include only the time zone part of this transition, 39075267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 39175267Swollman# the Julian calendar. 39214343Swollman# 39386222Swollman# As far as we know, none of the exact locations mentioned below were 39486222Swollman# permanently inhabited in 1867 by anyone using either calendar. 39586222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 39686222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 39786222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 39886222Swollman# it's best to simply use the official transition. 39986222Swollman# 40014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 40175267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 40275267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 40314343Swollman -8:00 - PST 1942 40414343Swollman -8:00 US P%sT 1946 40514343Swollman -8:00 - PST 1969 40614343Swollman -8:00 US P%sT 1983 Oct 30 2:00 407136638Swollman -9:00 US Y%sT 1983 Nov 30 40814343Swollman -9:00 US AK%sT 40975267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 41075267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 41114343Swollman -9:00 - YST 1942 41214343Swollman -9:00 US Y%sT 1946 41314343Swollman -9:00 - YST 1969 414136638Swollman -9:00 US Y%sT 1983 Nov 30 41514343Swollman -9:00 US AK%sT 41675267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 41775267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 41814343Swollman -10:00 - CAT 1942 419158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 420158421Swollman -10:00 US CAT/CAPT 1946 # Peace 42114343Swollman -10:00 - CAT 1967 Apr 42214343Swollman -10:00 - AHST 1969 42314343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 424136638Swollman -9:00 US Y%sT 1983 Nov 30 42514343Swollman -9:00 US AK%sT 42675267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 42775267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 42814343Swollman -11:00 - NST 1942 42914343Swollman -11:00 US N%sT 1946 43014343Swollman -11:00 - NST 1967 Apr 43114343Swollman -11:00 - BST 1969 43214343Swollman -11:00 US B%sT 1983 Oct 30 2:00 433136638Swollman -9:00 US Y%sT 1983 Nov 30 43414343Swollman -9:00 US AK%sT 43575267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 43675267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 43714343Swollman -11:00 - NST 1942 43814343Swollman -11:00 US N%sT 1946 43914343Swollman -11:00 - NST 1967 Apr 44014343Swollman -11:00 - BST 1969 44114343Swollman -11:00 US B%sT 1983 Oct 30 2:00 442136638Swollman -10:00 US AH%sT 1983 Nov 30 44314343Swollman -10:00 US HA%sT 444149514Swollman# The following switches don't quite make our 1970 cutoff. 445149514Swollman# 44614343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 44714343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 44814343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 449149514Swollman# 450149514Swollman# From David Flater (2004-11-09): 451149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 452149514Swollman# Historic Preservation Commission, provided this information, which 453149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 454149514Swollman# possibly until 1983: 455149514Swollman# 456149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 457149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 458149514Swollman# location not on Alaska Standard Time. The following resolution was 459149514Swollman# made by William Robinson and seconded by Henry Swanson: Be it 460149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 461149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 462149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 463149514Swollman# three votes for and one against." 4642742Swollman 46514343Swollman# Hawaii 46614343Swollman# 46714343Swollman# From Arthur David Olson: 46814343Swollman# And then there's Hawaii. 46914343Swollman# DST was observed for one day in 1933; 47014343Swollman# standard time was changed by half an hour in 1947; 47114343Swollman# it's always standard as of 1986. 47214343Swollman# 47314343Swollman# From Paul Eggert: 47414343Swollman# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 47514343Swollman# 47614343SwollmanZone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 47714343Swollman -10:30 - HST 1933 Apr 30 2:00 47814343Swollman -10:30 1:00 HDT 1933 May 21 2:00 47914343Swollman -10:30 US H%sT 1947 Jun 8 2:00 48014343Swollman -10:00 - HST 4812742Swollman 48214343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 48314343Swollman 48414343Swollman# Arizona mostly uses MST. 485114173Swollman 486114173Swollman# From Paul Eggert (2002-10-20): 487114173Swollman# 488114173Swollman# The information in the rest of this paragraph is derived from the 489114173Swollman# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 490114173Swollman# Daylight Saving Time web page (2002-01-23)</a> maintained by the 491114173Swollman# Arizona State Library, Archives and Public Records. 492114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 493114173Swollman# time, but by federal law railroads, airlines, bus lines, military 494114173Swollman# personnel, and some engaged in interstate commerce continued to 495114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 496114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 497114173Swollman# the date the state's clocks would change. In 1945 the State of 498114173Swollman# Arizona used standard time all year, again with exceptions only as 499114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 500114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 501114173Swollman# 502114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 503114173Swollman# Go with the Arizona State Library instead. 504114173Swollman 505149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 50614343Swollman -7:00 US M%sT 1944 Jan 1 00:01 507114173Swollman -7:00 - MST 1944 Apr 1 00:01 50814343Swollman -7:00 US M%sT 1944 Oct 1 00:01 50914343Swollman -7:00 - MST 1967 510114173Swollman -7:00 US M%sT 1968 Mar 21 51114343Swollman -7:00 - MST 51219878Swollman# From Arthur David Olson (1988-02-13): 51314343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 514136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 5152742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 5162742Swollman# large size and location in three states." (The "only" means that other 5172742Swollman# tribal nations don't use DST.) 5182742Swollman 51914343SwollmanLink America/Denver America/Shiprock 5202742Swollman 521136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 522136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 523136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 524136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 525136638Swollman# Teton, Twin Falls, Valley, Washington counties) and eastern Oregon 526136638Swollman# switched four weeks late in 1974. 527149514Swollman# 52814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 529149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 53014343Swollman -8:00 US P%sT 1923 May 13 2:00 53114343Swollman -7:00 US M%sT 1974 53214343Swollman -7:00 - MST 1974 Feb 3 2:00 53314343Swollman -7:00 US M%sT 5342742Swollman 53514343Swollman# Indiana 53614343Swollman# 53758787Sru# For a map of Indiana's time zone regions, see: 53858787Sru# <a href="http://www.mccsc.edu/time.html"> 53958787Sru# What time is it in Indiana? 540158421Swollman# </a> (2006-03-01) 54158787Sru# 542158421Swollman# From Paul Eggert (2006-03-22): 543149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 544149590Swollman# with the following exceptions: 545149590Swollman# 546149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 547149590Swollman# Vandenburgh, and Warrick counties have been like America/Chicago. 548149590Swollman# 549149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 550149590Swollman# 551149590Swollman# - Clark, Floyd, and Harrison counties have been like 552149590Swollman# America/Kentucky/Louisville. 553149590Swollman# 554158421Swollman# - Daviess, Dubois, Knox, Martin, Perry, and Pulaski counties 555158421Swollman# have been like America/Indiana/Vincennes. 556158421Swollman# 557158421Swollman# - Crawford, Pike, Starke, and Switzerland counties have their own time zone 558149590Swollman# histories as noted below. 559149590Swollman# 560158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 561158421Swollman# and wrote ``Even newspaper reports present contradictory information.'' 562158421Swollman# Those Hoosiers! Such a flighty and changeable people! 56314343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 56414343Swollman# 56514343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 56614343Swollman# that they would be ambiguous if we left them at the `America' level. 56714343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 56875267Swollman 569149514Swollman# From Paul Eggert (2005-08-16): 570158421Swollman# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 57175267Swollman 572158421Swollman# From Nathan Stratton Treadway (2006-03-30): 573158421Swollman# http://www.dot.gov/affairs/dot0406.htm [3705 B] 574158421Swollman# From Deborah Goldsmith (2006-01-18): 575158421Swollman# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 576158421Swollman# From Paul Eggert (2006-01-20): 577158421Swollman# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 578158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 579158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 580158421Swollman# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 581158421Swollman# changeover date from standard time to Daylight Saving Time." 582158421Swollman# Strictly speaking, this means the affected counties will change their 583158421Swollman# clocks twice that night, but this obviously is in error. The intent 584158421Swollman# is that 01:59:59 EST be followed by 02:00:00 CDT. 585158421Swollman 58614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 58714343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 58814343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 58914343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 59014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 591149514SwollmanZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 59214343Swollman -6:00 US C%sT 1920 59314343Swollman -6:00 Indianapolis C%sT 1942 59414343Swollman -6:00 US C%sT 1946 59514343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 59614343Swollman -5:00 - EST 1957 Sep 29 2:00 59714343Swollman -6:00 - CST 1958 Apr 27 2:00 59814343Swollman -5:00 - EST 1969 59914343Swollman -5:00 US E%sT 1971 600149514Swollman -5:00 - EST 2006 601149514Swollman -5:00 US E%sT 6022742Swollman# 603158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 604158421Swollman# as well as from 1976 through 2005. 60514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 60614343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 60714343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 60814343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 60914343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 61014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 611149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 61214343Swollman -6:00 US C%sT 1951 61314343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 61414343Swollman -5:00 - EST 1969 61514343Swollman -5:00 US E%sT 1974 Jan 6 2:00 61614343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 61714343Swollman -5:00 US E%sT 1976 618149514Swollman -5:00 - EST 2006 619149514Swollman -5:00 US E%sT 62014343Swollman# 621158421Swollman# Daviess, Dubois, Knox, Martin, Perry, and Pulaski Counties, Indiana, 622158421Swollman# switched from eastern to central time in April 2006. 623158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 624158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 625158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 626158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 627158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 628158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 629158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 630158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 631158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 632158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 633158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 634158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 635158421Swollman -6:00 US C%sT 1946 636158421Swollman -6:00 Vincennes C%sT 1964 Apr 26 2:00 637158421Swollman -5:00 - EST 1969 638158421Swollman -5:00 US E%sT 1971 639158421Swollman -5:00 - EST 2006 Apr 2 2:00 640158421Swollman -6:00 US C%sT 641158421Swollman# 642158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 643158421Swollman# then switched back in 2006. 644158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 645158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 646158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 647158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 648158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 649158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 650158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 651158421Swollman -6:00 US C%sT 1955 652158421Swollman -6:00 Pike C%sT 1965 Apr 25 2:00 653158421Swollman -5:00 - EST 1966 Oct 30 2:00 654158421Swollman -6:00 US C%sT 1977 Oct 30 2:00 655158421Swollman -5:00 - EST 2006 Apr 2 2:00 656158421Swollman -6:00 US C%sT 657158421Swollman# 658158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 659158421Swollman# then switched back in 2006. 66019878Swollman# From Arthur David Olson (1991-10-28): 66119878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 66214343Swollman# notes that Starke County switched from Central time to Eastern time as of 66319878Swollman# 1991-10-27. 66414343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 66514343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 66614343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 66714343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 66814343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 66914343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 67014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 671149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 67214343Swollman -6:00 US C%sT 1947 67314343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 67414343Swollman -5:00 - EST 1963 Oct 27 2:00 67514343Swollman -6:00 US C%sT 1991 Oct 27 2:00 676158421Swollman -5:00 - EST 2006 Apr 2 2:00 677158421Swollman -6:00 US C%sT 67814343Swollman# 679158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 68014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 681149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 68214343Swollman -6:00 US C%sT 1954 Apr 25 2:00 68314343Swollman -5:00 - EST 1969 68414343Swollman -5:00 US E%sT 1973 685149514Swollman -5:00 - EST 2006 686149514Swollman -5:00 US E%sT 6872742Swollman 68814343Swollman# Part of Kentucky left its clocks alone in 1974. 689149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 69014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 69114343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 69214343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 69314343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 69414343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 69514343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 69614343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 69714343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 69814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 699149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 70014343Swollman -6:00 US C%sT 1921 70114343Swollman -6:00 Louisville C%sT 1942 70214343Swollman -6:00 US C%sT 1946 70314343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 70414343Swollman -5:00 - EST 1968 70514343Swollman -5:00 US E%sT 1974 Jan 6 2:00 70614343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 70714343Swollman -5:00 US E%sT 70867578Swollman# 709158421Swollman# Wayne County, Kentucky 71058787Sru# 71158787Sru# From 71258787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 71358787Sru# Lake Cumberland LIFE 71458787Sru# </a> (1999-01-29) via WKYM-101.7: 71558787Sru# Clinton County has joined Wayne County in asking the DoT to change from 71658787Sru# the Central to the Eastern time zone.... The Wayne County government made 71758787Sru# the same request in December. And while Russell County officials have not 71858787Sru# taken action, the majority of respondents to a poll conducted there in 71958787Sru# August indicated they would like to change to "fast time" also. 72058787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 72158787Sru# location in the Central time zone. 72267578Swollman# 72367578Swollman# From Rich Wales (2000-08-29): 72467578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 72567578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 72675267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 72775267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 72886222Swollman# 72986222Swollman# From Paul Eggert (2001-07-16): 73086222Swollman# The final rule was published in the 73186222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 73286222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 73386222Swollman# </a> 734114173Swollman# 735149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 73667578Swollman -6:00 US C%sT 1946 73767578Swollman -6:00 - CST 1968 73867578Swollman -6:00 US C%sT 2000 Oct 29 2:00 73967578Swollman -5:00 US E%sT 7402742Swollman 74167578Swollman 74267578Swollman# From Rives McDow (2000-08-30): 74367578Swollman# Here ... are all the changes in the US since 1985. 74467578Swollman# Kearny County, KS (put all of county on central; 74567578Swollman# previously split between MST and CST) ... 1990-10 74667578Swollman# Starke County, IN (from CST to EST) ... 1991-10 74767578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 74867578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 74967578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 75067578Swollman# 75186222Swollman# From Paul Eggert (2001-07-17): 75286222Swollman# We don't know where the line used to be within Kearny County, KS, 75386222Swollman# so omit that change for now. 75486222Swollman# See America/Indiana/Knox for the Starke County, IN change. 75586222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 75686222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 75786222Swollman# 1999-10-31. See the 75886222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 75986222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 76086222Swollman# </a> 76186222Swollman# However, the Federal Register says that West Wendover already operated 76286222Swollman# on mountain time, and the rule merely made this official; 76386222Swollman# hence a separate tz entry is not needed. 76467578Swollman 76514343Swollman# Michigan 76614343Swollman# 76719878Swollman# From Bob Devine (1988-01-28): 76814343Swollman# Michigan didn't observe DST from 1968 to 1973. 76914343Swollman# 77058787Sru# From Paul Eggert (1999-03-31): 77158787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 77258787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 77358787Sru# that Detroit kept 77414343Swollman# 77514343Swollman# local time until 1900 when the City Council decreed that clocks should 77614343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 77714343Swollman# city obeyed, half refused. After considerable debate, the decision 77814343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 77914343Swollman# erect a sundial in front of the city hall was referred to the 78014343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 78114343Swollman# by city vote. 78214343Swollman# 78314343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 78414343Swollman# 78575267Swollman# From Paul Eggert (2001-03-06): 78675267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 78775267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 78875267Swollman# info, so omit this for now. 78975267Swollman# 79014343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 79114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 79214343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 79314343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 79414343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 79514343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 79614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 79714343SwollmanZone America/Detroit -5:32:11 - LMT 1905 79814343Swollman -6:00 - CST 1915 May 15 2:00 79914343Swollman -5:00 - EST 1942 80014343Swollman -5:00 US E%sT 1946 80114343Swollman -5:00 Detroit E%sT 1973 80214343Swollman -5:00 US E%sT 1975 80314343Swollman -5:00 - EST 1975 Apr 27 2:00 80414343Swollman -5:00 US E%sT 80514343Swollman# 806158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 807158421Swollman# switched from EST to CST/CDT in 1973. 80814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 80914343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 81014343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 81114343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 81214343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 81314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 81414343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 81514343Swollman -6:00 US C%sT 1946 81614343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 81714343Swollman -5:00 - EST 1973 Apr 29 2:00 81814343Swollman -6:00 US C%sT 81914343Swollman 8202742Swollman# Navassa 82186222Swollman# administered by the US Fish and Wildlife Service 82243543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 82343543Swollman# also claimed by Haiti 82443543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 82586222Swollman# US lighthouse 1917/1996-09 82643543Swollman# currently uninhabited 82743543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 82843543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 82943543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 83014343Swollman 8312742Swollman################################################################################ 8322742Swollman 8332742Swollman 834158421Swollman# From Paul Eggert (2006-03-22): 835158421Swollman# A good source for time zone historical data outside the U.S. is 836158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 837158421Swollman# San Diego: ACS Publications, Inc. (2003). 8382742Swollman# 83986222Swollman# Gwillim Law writes that a good source 84020094Swollman# for recent time zone data is the International Air Transport 84120094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 84220094Swollman# published semiannually. Law sent in several helpful summaries 84320094Swollman# of the IATA's data after 1990. 84420094Swollman# 845158421Swollman# Except where otherwise noted, Shanks & Pottenger is the source for 846158421Swollman# entries through 1990, and IATA SSIM is the source for entries afterwards. 84720094Swollman# 848121098Swollman# Other sources occasionally used include: 8492742Swollman# 850121098Swollman# Edward W. Whitman, World Time Differences, 851121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 852121098Swollman# which I found in the UCLA library. 853121098Swollman# 854121098Swollman# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 855121098Swollman# William Willett, The Waste of Daylight, 19th edition 856121098Swollman# </a> (1914-03) 857121098Swollman# 8589908Swollman# See the `europe' file for Greenland. 8592742Swollman 8602742Swollman# Canada 8612742Swollman 862149514Swollman# From Alain LaBont<e'> (1994-11-14): 8639908Swollman# I post here the time zone abbreviations standardized in Canada 8649908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 8659908Swollman# 8669908Swollman# UTC Standard time Daylight savings time 8679908Swollman# offset French English French English 8689908Swollman# -2:30 - - HAT NDT 8699908Swollman# -3 - - HAA ADT 8709908Swollman# -3:30 HNT NST - - 8719908Swollman# -4 HNA AST HAE EDT 8729908Swollman# -5 HNE EST HAC CDT 8739908Swollman# -6 HNC CST HAR MDT 8749908Swollman# -7 HNR MST HAP PDT 8759908Swollman# -8 HNP PST HAY YDT 8769908Swollman# -9 HNY YST - - 8779908Swollman# 8789908Swollman# HN: Heure Normale ST: Standard Time 8799908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 8809908Swollman# 8819908Swollman# A: de l'Atlantique Atlantic 8829908Swollman# C: du Centre Central 8839908Swollman# E: de l'Est Eastern 8849908Swollman# M: Mountain 8859908Swollman# N: Newfoundland 8869908Swollman# P: du Pacifique Pacific 8879908Swollman# R: des Rocheuses 8889908Swollman# T: de Terre-Neuve 8899908Swollman# Y: du Yukon Yukon 8909908Swollman# 891149514Swollman# From Paul Eggert (1994-11-22): 8929908Swollman# Alas, this sort of thing must be handled by localization software. 8932742Swollman 894158421Swollman# Unless otherwise specified, the data for Canada are all from Shanks 895158421Swollman# & Pottenger. 8969908Swollman 897158421Swollman# From Chris Walton (2006-04-01): 898158421Swollman# The British Columbia government announced yesterday that it will 899158421Swollman# adjust daylight savings next year to align with changes in the 900158421Swollman# U.S. and the rest of Canada.... 901158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 902158421Swollman 903158421Swollman# From Paul Eggert (2006-04-25): 90467578Swollman# H. David Matthews and Mary Vincent's map 905153761Swollman# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 90667578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 90767578Swollman# </a> contains detailed boundaries for regions observing nonstandard 90867578Swollman# time and daylight saving time arrangements in Canada circa 1998. 90967578Swollman# 910153761Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has <a 911153761Swollman# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 91267578Swollman# information about standard and daylight saving time zones in Canada. 91367578Swollman# </a> (updated periodically). 91467578Swollman# Its unofficial information is often taken from Matthews and Vincent. 915153761Swollman# 916153761Swollman# CBC News reported that Ontario and Manitoba have announced plans to 917158421Swollman# follow the US change; see 918153761Swollman# <http://www.cbc.ca/news/background/daylightsavingtime/> (2005-10-21). 919153761Swollman# CBC news also reported that Prince Edward Island is the first 920153761Swollman# province in Atlantic Canada to follow the US change, and that Quebec 921153761Swollman# had agreed; see <http://www.cbc.ca/pei/story/pe_daylight_20051207.html> 922158421Swollman# (2005-12-07). It also reported that Alberta will fall into line; see 923158421Swollman# <http://www.cbc.ca/calgary/story/ca_daylight20060202.html> (2006-02-02). 924158421Swollman# For now, assume all of Canada will fall into line. 9259908Swollman 9262742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 92717200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 92817200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 929121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 930121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 93117200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 93217200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 933153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 934153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 935153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 936153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 93717200Swollman 93817200Swollman 93967578Swollman# Newfoundland (and far southeast Labrador) 94017200Swollman 94167578Swollman# From Paul Eggert (2000-10-02): 94267578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 94367578Swollman# but the only part of Labrador that follows the rules is the 94467578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 94567578Swollman# but excluding, say, Black Tickle. 94667578Swollman 94717200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 948121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 9492742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 950158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 9512742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 9522742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 953158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 9542742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 9552742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 956158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 957158421Swollman# Pottenger. 958121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 959121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 960121098Swollman# Whitman gives the following transitions: 961121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 962158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 9632742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 964158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 9652742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 9662742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 9672742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 9682742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 96967578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 97067578Swollman# From Paul Eggert (2000-10-02): 97167578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 97267578Swollman# at 00:01 local time. For now, assume it started in 1987. 97367578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 974158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 97567578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 976158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 977158421Swollman# From Chris Walton (2006-04-05): 978158421Swollman# http://www.releases.gov.nl.ca/releases/2006/mpa/0331n01.htm 979158421Swollman# [This says Newfoundlandland expects to follow step with the US.] 980158421SwollmanRule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D 981158421SwollmanRule StJohns 2007 max - Nov Sun>=1 0:01 0 S 982158421Swollman# 9832742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 9842742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9852742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 986121098Swollman -3:30:52 StJohns N%sT 1918 987121098Swollman -3:30:52 Canada N%sT 1919 98820094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 989121098Swollman -3:30 StJohns N%sT 1942 May 11 990121098Swollman -3:30 Canada N%sT 1946 9912742Swollman -3:30 StJohns N%sT 9922742Swollman 99367578Swollman# most of east Labrador 99417200Swollman 99520094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 99620094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 99720094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 998121098Swollman -3:30:52 - NST 1918 999121098Swollman -3:30:52 Canada N%sT 1919 100020094Swollman -3:30:52 - NST 1935 Mar 30 100120094Swollman -3:30 - NST 1936 1002121098Swollman -3:30 StJohns N%sT 1942 May 11 1003121098Swollman -3:30 Canada N%sT 1946 100420094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 100520094Swollman -4:00 StJohns A%sT 100620094Swollman 100720094Swollman 1008158421Swollman# west Labrador, Nova Scotia, Prince Edward I 100920094Swollman 1010158421Swollman# From Paul Eggert (2006-03-22): 1011158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1012158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 101317200Swollman# Glace Bay, NS is the largest that we know of. 1014158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1015158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1016158421Swollman# this is a typo. 101717200Swollman 1018158421Swollman# From Chris Walton (2006-04-25): 1019158421Swollman# Daylight saving time will be extended by four weeks starting in 2007.... 1020158421Swollman# Here is a news release which was issued today by the Nova Scotia government: 1021158421Swollman# http://www.gov.ns.ca/news/details.asp?id=20060425004 102267578Swollman 10232742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1024158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1025158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1026158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1027158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1028158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1029158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1030158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1031158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1032158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1033158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1034158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1035158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1036158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1037158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1038158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1039158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1040158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1041158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1042158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1043158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1044158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1045158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1046158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1047158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1048158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1049158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1050158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1051158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1052158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1053158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1054158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1055158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1056158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1057158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1058158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1059158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1060158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1061158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1062158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1063158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1064158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 10652742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10662742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1067121098Swollman -4:00 Halifax A%sT 1918 1068121098Swollman -4:00 Canada A%sT 1919 1069121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 1070121098Swollman -4:00 Canada A%sT 1946 1071121098Swollman -4:00 Halifax A%sT 1974 1072121098Swollman -4:00 Canada A%sT 107317200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 107417200Swollman -4:00 Canada A%sT 1953 107517200Swollman -4:00 Halifax A%sT 1954 107617200Swollman -4:00 - AST 1972 1077121098Swollman -4:00 Halifax A%sT 1974 1078121098Swollman -4:00 Canada A%sT 10792742Swollman 1080158421Swollman# New Brunswick 10818029Swollman 1082158421Swollman# From Paul Eggert (2006-01-20): 1083158421Swollman# New Brunswick's Time Definition Act 1084158421Swollman# <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> says they change at 00:01, and 1085158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1086158421Swollman# clear that this has been the case since at least 1993. 1087158421Swollman# For now, assume it started in 1993. The Office of the Premier announced 1088158421Swollman# <http://www.gnb.ca/cnb/news/pre/2005e1737pr.htm> (2005-12-23) 1089158421Swollman# that they will bring forward proposed amendments to harmonize with the US; 1090158421Swollman# for now assume that this will happen, but they'll still switch at 00:01. 1091158421Swollman 1092158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1093158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1094158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1095158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1096158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1097158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1098158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1099158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1100158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1101158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1102158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1103158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1104158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1105158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1106158421SwollmanRule Moncton 2007 max - Mar Sun>=8 0:01 1:00 D 1107158421SwollmanRule Moncton 2007 max - Nov Sun>=1 0:01 0 S 1108158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1109158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1110158421Swollman -5:00 - EST 1902 Jun 15 1111158421Swollman -4:00 Canada A%sT 1933 1112158421Swollman -4:00 Moncton A%sT 1942 1113158421Swollman -4:00 Canada A%sT 1946 1114158421Swollman -4:00 Moncton A%sT 1973 1115158421Swollman -4:00 Canada A%sT 1993 1116158421Swollman -4:00 Moncton A%sT 1117158421Swollman 111817200Swollman# Ontario, Quebec 111917200Swollman 1120158421Swollman# From Paul Eggert (2006-03-22): 1121158421Swollman# Shanks & Pottenger writes that since 1970 most of Ontario has been like 1122158421Swollman# Toronto, and most of Quebec has been like Montreal. 112317200Swollman# Thunder Bay skipped DST in 1973. 112417200Swollman# Many smaller locales did not observe peacetime DST until 1974; 112517200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 112617200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 112717200Swollman 1128121098Swollman# From Mark Brader (2003-07-26): 1129121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1130121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1131121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1132121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1133121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1134121098Swollman# hostility from certain segments of the public, and was revoked after 1135121098Swollman# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1136121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1137121098Swollman# earlier in June). 1138121098Swollman# 1139121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1140121098Swollman 114143014Swollman# From Paul Eggert (1997-10-17): 1142121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 114343014Swollman# says that Atikokan, Ontario currently does not observe DST, 114443014Swollman# but will vote on 11-10 whether to use EST/EDT. 114543014Swollman# He also writes that the 114643014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 114743014Swollman# Ontario Time Act (1990, Chapter T.9) 114843014Swollman# </a> 114943014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 115043014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 115143014Swollman# concerns a non-official time observed as a matter of local practice. 1152158421Swollman# 1153158421Swollman# From Paul Eggert (2006-03-22): 1154158421Swollman# For what it's worth, Shanks & Pottenger say that Atikokan has agreed with 115543014Swollman# Rainy River ever since standard time was introduced. 115643014Swollman 115767578Swollman# From Paul Eggert (2000-10-02): 115867578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 115967578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 116067578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 116167578Swollman# violation of the official Ontario rules. 116267578Swollman# They also write that Quebec east of the -63 meridian is supposed to 116367578Swollman# observe AST, but residents as far east as Natashquan use EST/EDT, 116467578Swollman# and residents east of Natashquan use AST. 116567578Swollman# We probably need Zones for far east Quebec and for Atikokan, 116667578Swollman# but we don't know when their practices started. 116767578Swollman 11682742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 11692742SwollmanRule Mont 1917 only - Mar 25 2:00 1:00 D 11702742SwollmanRule Mont 1917 only - Apr 24 0:00 0 S 11712742SwollmanRule Mont 1919 only - Mar 31 2:30 1:00 D 11722742SwollmanRule Mont 1919 only - Oct 25 2:30 0 S 11732742SwollmanRule Mont 1920 only - May 2 2:30 1:00 D 1174121098SwollmanRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 11752742SwollmanRule Mont 1921 only - May 1 2:00 1:00 D 11762742SwollmanRule Mont 1922 only - Apr 30 2:00 1:00 D 11772742SwollmanRule Mont 1924 only - May 17 2:00 1:00 D 11782742SwollmanRule Mont 1924 1926 - Sep lastSun 2:30 0 S 11792742SwollmanRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1180136638Swollman# The 1927-to-1937 rules can be expressed more simply as 1181136638Swollman# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1182136638Swollman# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1183136638Swollman# The rules below avoid use of 24:00 1184136638Swollman# (which pre-1998 versions of zic cannot handle). 1185136638SwollmanRule Mont 1927 only - May 1 0:00 1:00 D 1186136638SwollmanRule Mont 1927 1932 - Sep lastSun 0:00 0 S 1187136638SwollmanRule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1188136638SwollmanRule Mont 1932 only - May 1 0:00 1:00 D 1189136638SwollmanRule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1190136638SwollmanRule Mont 1933 only - Oct 1 0:00 0 S 1191136638SwollmanRule Mont 1934 1939 - Sep lastSun 0:00 0 S 1192121098SwollmanRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 11932742SwollmanRule Mont 1945 1948 - Sep lastSun 2:00 0 S 11942742SwollmanRule Mont 1949 1950 - Oct lastSun 2:00 0 S 11952742SwollmanRule Mont 1951 1956 - Sep lastSun 2:00 0 S 1196121098SwollmanRule Mont 1957 1973 - Oct lastSun 2:00 0 S 1197121098Swollman 1198121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1199121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1200121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1201121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1202121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1203121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1204121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1205158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1206158421Swollman# was meant. 1207121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1208121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1209136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1210136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1211136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1212136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1213136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1214136638Swollman# The rules below avoid use of Sun>=25 1215136638Swollman# (which pre-2004 versions of zic cannot handle). 1216136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1217136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1218136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1219136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1220136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1221136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1222121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1223121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1224121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1225121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1226121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1227121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1228121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1229121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1230158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1231158421Swollman# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that he 1232158421Swollman# checked the 1971-10-30 issue of the Toronto Star, and it said that 1233158421Swollman# DST ended 1971-10-31 as usual. 1234121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1235121098Swollman 1236121098Swollman# From Paul Eggert (2003-07-27): 1237121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1238121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1239121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1240136638Swollman# Saskatchewan, for one year." 1241121098Swollman 1242136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1243136638Swollman# Thunder Bay Museum (2003-11-12): 1244136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1245136638Swollman# savings time was being practiced in Fort William and Port Arthur 1246136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1247136638Swollman# Time Zones was permanently moved about two hundred miles west to 1248136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1249136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1250136638Swollman# already, did not change their clocks.... During the Second World 1251136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1252136638Swollman# months for the remainder of the war years. 1253136638Swollman 12542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12552742SwollmanZone America/Montreal -4:54:16 - LMT 1884 1256121098Swollman -5:00 Mont E%sT 1918 1257121098Swollman -5:00 Canada E%sT 1919 1258121098Swollman -5:00 Mont E%sT 1942 Feb 9 2:00s 1259121098Swollman -5:00 Canada E%sT 1946 1260121098Swollman -5:00 Mont E%sT 1974 1261121098Swollman -5:00 Canada E%sT 1262121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1263121098Swollman -5:00 Canada E%sT 1919 1264121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1265121098Swollman -5:00 Canada E%sT 1946 1266121098Swollman -5:00 Toronto E%sT 1974 1267121098Swollman -5:00 Canada E%sT 126817200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1269136638Swollman -6:00 - CST 1910 1270136638Swollman -5:00 - EST 1942 127117200Swollman -5:00 Canada E%sT 1970 127217200Swollman -5:00 Mont E%sT 1973 127317200Swollman -5:00 - EST 1974 127417200Swollman -5:00 Canada E%sT 127517200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1276121098Swollman -5:00 Canada E%sT 1940 Sep 29 1277121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 127817200Swollman -5:00 Canada E%sT 127917200SwollmanZone America/Rainy_River -6:17:56 - LMT 1895 1280121098Swollman -6:00 Canada C%sT 1940 Sep 29 1281121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 128217200Swollman -6:00 Canada C%sT 12832742Swollman 12848029Swollman 128517200Swollman# Manitoba 128619878Swollman 1287158421Swollman# From Chris Walton (2006-04-05): 1288158421Swollman# Here is a copy of the new official time act ... 1289158421Swollman# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1290158421Swollman# The act indicates that daylight savings ends at 2:00am. 1291158421Swollman 1292158421Swollman# From Rob Douglas (2006-04-06): 1293158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1294158421Swollman# March 27, 1987 ... said ... 1295158421Swollman# "between two o'clock Central Standard Time in the morning of 1296158421Swollman# the first Sunday of April of each year and two o'clock Central 1297158421Swollman# Standard Time in the morning of the last Sunday of October next 1298158421Swollman# following, one hour in advance of Central Standard Time."... 1299158421Swollman# I believe that the English legislation [of the old time act] had = 1300158421Swollman# been assented to (March 22, 1967).... 1301158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1302158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1303158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1304158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1305158421Swollman 1306158421Swollman# From Paul Eggert (2006-04-10): 1307158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1308158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1309158421Swollman# it was also 02:00s in 1966. 1310158421Swollman 13112742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 13122742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 13132742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 13142742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 13152742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 13162742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 131714343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1318121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1319121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 13202742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 13212742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 13222742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 13232742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 132414343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 132514343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 132614343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 132714343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 132814343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 13292742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 13302742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 13312742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 133214343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1333158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1334158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1335158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 13362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13372742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1338158421Swollman -6:00 Winn C%sT 2006 1339158421Swollman -6:00 Canada C%sT 13402742Swollman 13418029Swollman 134217200Swollman# Saskatchewan 134317200Swollman 1344121098Swollman# From Mark Brader (2003-07-26): 1345121098Swollman# The first actual adoption of DST in Canada was at the municipal 1346121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1347121098Swollman# elsewhere have long been talking of legislation to save daylight, 1348121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1349121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1350121098Swollman# presumably late evening, as below), and would run until "the end of 1351121098Swollman# the summer". The discrepancy between municipal time and railroad 1352121098Swollman# time was noted. 1353121098Swollman 1354121098Swollman# From Paul Eggert (2003-07-27): 1355121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1356121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1357121098Swollman 1358158421Swollman# From Paul Eggert (2006-03-22): 1359158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 136017200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 136117200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 136267578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 136367578Swollman# are like Winnipeg, in violation of Saskatchewan law. 136417200Swollman 1365149514Swollman# From W. Jones (1992-11-06): 136617200Swollman# The. . .below is based on information I got from our law library, the 136717200Swollman# provincial archives, and the provincial Community Services department. 136817200Swollman# A precise history would require digging through newspaper archives, and 136917200Swollman# since you didn't say what you wanted, I didn't bother. 137017200Swollman# 137117200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 137217200Swollman# the boundary became pretty ragged as communities near it reevaluated 137317200Swollman# their affiliations in one direction or the other. In 1965 a provincial 137417200Swollman# referendum favoured legislating common time practices. 137517200Swollman# 137617200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 137717200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 137817200Swollman# part of Saskatchewan would use CST year round, that districts in 137917200Swollman# northwest Saskatchewan would by default follow CST but could opt to 138017200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 138117200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 138217200Swollman# by default follow MT but could opt to follow CST. 138317200Swollman# 138417200Swollman# It took a few years for the dust to settle (I know one story of a town 138517200Swollman# on one time zone having its school in another, such that a mom had to 138617200Swollman# serve her family lunch in two shifts), but presently it seems that only 138717200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 138817200Swollman# rules any more; all other districts appear to have used CST year round 138917200Swollman# since sometime in the 1960s. 139017200Swollman 13912742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 13922742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 13932742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 13942742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 13952742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 13962742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 13972742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 13982742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 13992742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1400121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1401121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 14022742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 140317200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 140417200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1405121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1406121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1407121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 140817200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 140917200Swollman# 141017200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 141117200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 141217200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 141317200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 141417200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 14152742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 141617200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 141717200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 14182742Swollman -6:00 - CST 141917200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 142017200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 142117200Swollman -7:00 Regina M%sT 1950 142217200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 142317200Swollman -6:00 - CST 14242742Swollman 14258029Swollman 142617200Swollman# Alberta 142717200Swollman 14282742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14292742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 14302742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 14312742SwollmanRule Edm 1919 only - May 27 2:00 0 S 14322742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 14332742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 14342742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1435121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1436121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 14372742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 14382742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 14392742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 14402742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 14412742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 14422742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 14432742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 14442742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1445158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 14462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14472742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1448158421Swollman -7:00 Edm M%sT 1987 1449158421Swollman -7:00 Canada M%sT 14502742Swollman 14518029Swollman 145217200Swollman# British Columbia 145317200Swollman 1454158421Swollman# From Paul Eggert (2006-03-22): 1455158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1456158421Swollman# been like Vancouver. 145758787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 145867578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 145917200Swollman 14602742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14612742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 14622742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 1463121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1464121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 14652742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 14662742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 14672742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 14682742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1469158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 14702742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14712742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1472158421Swollman -8:00 Vanc P%sT 1987 1473158421Swollman -8:00 Canada P%sT 147417200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 147517200Swollman -8:00 Canada P%sT 1947 147617200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 147717200Swollman -7:00 - MST 14782742Swollman 14798029Swollman 148058787Sru# Northwest Territories, Nunavut, Yukon 148117200Swollman 1482158421Swollman# From Paul Eggert (2006-03-22): 148317200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1484149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 148520094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 148620094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 148720094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 148820094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 148920094Swollman# * O.I.C. 1980/02 established DST. 149020094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1491158421Swollman# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1492158421Swollman# with Englander. 149317200Swollman 149458787Sru# From Rives McDow (1999-09-04): 149558787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 149658787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 149758787Sru# Nunavut moves to single time zone Oct. 31 149858787Sru# </a> 149958787Sru# 150058787Sru# From Antoine Leca (1999-09-06): 150158787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 150258787Sru# to differentiate it from the Yellowknife region. 150358787Sru 150458787Sru# From Paul Eggert (1999-09-20): 150558787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 150658787Sru# Basic Facts: The New Territory 150786222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 150858787Sru# and that Coral Harbour does not observe DST. We don't know when 150986222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 151058787Sru 151158787Sru# From Rives McDow (1999-11-08): 151258787Sru# On October 31, when the rest of Nunavut went to Central time, 151358787Sru# Pangnirtung wobbled. Here is the result of their wobble: 151458787Sru# 151558787Sru# The following businesses and organizations in Pangnirtung use Central Time: 151658787Sru# 151758787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 151858787Sru# Eastern Arctic National Parks, A & D Specialist 151958787Sru# 152058787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 152158787Sru# 152258787Sru# Hamlet office, All other businesses, Both schools, Airport operator 152358787Sru# 152458787Sru# This has made for an interesting situation there, which warranted the news. 152558787Sru# No one there that I spoke with seems concerned, or has plans to 152658787Sru# change the local methods of keeping time, as it evidently does not 152758787Sru# really interfere with any activities or make things difficult locally. 152858787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 152958787Sru# so it appears that the situation will last at least that long. 153058787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 153158787Sru# their senses", but the locals evidently don't see any problem with 153258787Sru# the current state of affairs. 153358787Sru 153458787Sru# From Michaela Rodrigue, writing in the 153558787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 153658787Sru# Nunatsiaq News (1999-11-19)</a>: 153758787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 153858787Sru# central - or Nunavut time - for government offices, and eastern time 153958787Sru# for municipal offices and schools.... Igloolik [was similar but then] 154058787Sru# made the switch to central time on Saturday, Nov. 6. 154158787Sru 154267578Swollman# From Paul Eggert (2000-10-02): 154367578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 154467578Swollman# for these potential new Zones. 154575267Swollman# 154667578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 154767578Swollman# handful of residents at the Eureka weather station [in the Central 154867578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 154967578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 155067578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 155167578Swollman# Central Time and Southampton Island [in the Central zone] is not 155267578Swollman# required to use daylight savings. 155367578Swollman 155475267Swollman# From 155575267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 155675267Swollman# Nunavut now has two time zones 155775267Swollman# </a> (2000-11-10): 155875267Swollman# The Nunavut government would allow its employees in Kugluktuk and 155975267Swollman# Cambridge Bay to operate on central time year-round, putting them 156075267Swollman# one hour behind the rest of Nunavut for six months during the winter. 156175267Swollman# At the end of October the two communities had rebelled against 156275267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 156375267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 156475267Swollman# central time, while Kugluktuk, even farther west, reverted to 156575267Swollman# mountain time, which they had used before the advent of Nunavut's 156675267Swollman# unified time zone in 1999. 156775267Swollman# 156875267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 156975267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 157075267Swollman 157175267Swollman# From Paul Eggert (2000-12-04): 157275267Swollman# Let's just keep track of the official times for now. 157375267Swollman 157475267Swollman# From Rives McDow (2001-03-07): 157575267Swollman# The premier of Nunavut has issued a ministerial statement advising 157675267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 157775267Swollman# back to three time zones (mountain, central, and eastern). Of the 157875267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 157975267Swollman# has said it will not observe dst, staying on EST year round. I'm 158075267Swollman# checking for more info, and will get back to you if I come up with 158175267Swollman# more. 158275267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 158375267Swollman 1584149514Swollman# From Gwillim Law (2005-05-21): 1585149514Swollman# According to maps at 1586149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1587149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1588149514Swollman# (both dated 2003), and 1589149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1590149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 1591149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1592149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 1593149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 1594149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 1595149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1596149514Swollman# 1597149514Swollman# From Paul Eggert (2005-07-26): 1598149514Swollman# For lack of better information, assume that Southampton Island observed 1599149514Swollman# daylight saving only during wartime. 1600158421Swollman# 1601158421Swollman# From Chris Walton (2006-04-25): 1602158421Swollman# Daylight saving time will be extended by four weeks starting in 2007.... 1603158421Swollman# http://www.cbc.ca/north/story/nor-nwt-time-change.html 1604149514Swollman 16052742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 160617200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 160717200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 160817200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 160917200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 1610121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1611121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 161217200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 161317200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 161417200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 161517200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 1616158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 1617158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 16182742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 161917200SwollmanZone America/Pangnirtung -4:22:56 - LMT 1884 162058787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 162158787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 162275267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 162375267Swollman -5:00 Canada E%sT 162458787SruZone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 162558787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 162675267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 162775267Swollman -5:00 Canada E%sT 1628149514SwollmanZone America/Coral_Harbour -5:32:40 - LMT 1884 1629149514Swollman -5:00 NT_YK E%sT 1946 1630149514Swollman -5:00 - EST 163175267SwollmanZone America/Rankin_Inlet -6:08:40 - LMT 1884 163275267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 163375267Swollman -5:00 - EST 2001 Apr 1 3:00 163458787Sru -6:00 Canada C%sT 163558787SruZone America/Cambridge_Bay -7:00:20 - LMT 1884 163658787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 163775267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 163875267Swollman -5:00 - EST 2000 Nov 5 0:00 163975267Swollman -6:00 - CST 2001 Apr 1 3:00 164075267Swollman -7:00 Canada M%sT 164117200SwollmanZone America/Yellowknife -7:37:24 - LMT 1884 1642158421Swollman -7:00 NT_YK M%sT 1980 1643158421Swollman -7:00 Canada M%sT 164417200SwollmanZone America/Inuvik -8:54:00 - LMT 1884 164517200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 1646158421Swollman -7:00 NT_YK M%sT 1980 1647158421Swollman -7:00 Canada M%sT 16482742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 164917200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 1650158421Swollman -8:00 NT_YK P%sT 1980 1651158421Swollman -8:00 Canada P%sT 165217200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 165320094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 1654158421Swollman -8:00 NT_YK P%sT 1980 1655158421Swollman -8:00 Canada P%sT 16562742Swollman 16578029Swollman 16582742Swollman############################################################################### 16592742Swollman 16602742Swollman# Mexico 16612742Swollman 166275267Swollman# From Paul Eggert (2001-03-05): 166375267Swollman# The Investigation and Analysis Service of the 166475267Swollman# Mexican Library of Congress (MLoC) has published a 166575267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 166675267Swollman# history of Mexican local time (in Spanish) 166775267Swollman# </a>. 16682742Swollman# 1669158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 167075267Swollman# (In all cases we go with the MLoC.) 1671158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 1672158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 1673158421Swollman# S&P report no DST during summer 1931. 1674158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 16752742Swollman 167675267Swollman# From Gwillim Law (2001-02-20): 167775267Swollman# There are some other discrepancies between the Decrees page and the 167875267Swollman# tz database. I think they can best be explained by supposing that 167975267Swollman# the researchers who prepared the Decrees page failed to find some of 168075267Swollman# the relevant documents. 168175267Swollman 1682149514Swollman# From Alan Perry (1996-02-15): 168317200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 168417200Swollman# outlining the timezone changes in Mexico. 168558787Sru# 168617200Swollman# ------------- Begin Forwarded Message ------------- 168758787Sru# 168817200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 168917200Swollman# rules for the DST changes. The rules are: 169058787Sru# 169117200Swollman# 1. The country is divided in 3 timezones: 169217200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 169317200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 169417200Swollman# - The rest of the country (the Mexico/General TZ) 169558787Sru# 169617200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 169717200Swollman# at 2:00 AM, the times in each zone are as follows: 169817200Swollman# BajaNorte: GMT+7 169917200Swollman# BajaSur: GMT+6 170017200Swollman# General: GMT+5 170158787Sru# 170217200Swollman# 3. The rest of the year, the times are as follows: 170317200Swollman# BajaNorte: GMT+8 170417200Swollman# BajaSur: GMT+7 170517200Swollman# General: GMT+6 170658787Sru# 170717200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 170858787Sru# 170917200Swollman# -------------- End Forwarded Message -------------- 171017200Swollman# From Paul Eggert (1996-06-12): 171143014Swollman# For an English translation of the decree, see 171243014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 171343014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 171443014Swollman# </a> 171514343Swollman 171643543Swollman# From Rives McDow (1998-10-08): 171743543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 171843543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 171943543Swollman 172058787Sru# From Rives McDow (2000-01-10): 172158787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 172258787Sru# zone 5 hours from the International Date Line, and will not observe daylight 172358787Sru# savings time so as to stay on the same time zone as the southern part of 172458787Sru# Arizona year round. 172558787Sru 172675267Swollman# From Jesper Norgaard, translating 172775267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 172875267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 172975267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 173075267Swollman# year, so that the more than 10,000 schools work at normal hour the 173175267Swollman# whole year. 173275267Swollman 173375267Swollman# From Gwillim Law (2001-01-19): 173475267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 173575267Swollman# (translated):... 173675267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 173775267Swollman# that Summer Time will be reduced from seven to five months, starting 173875267Swollman# this year.... 173975267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 174075267Swollman# [translated], says "summer time will ... take effect on the first Sunday 174175267Swollman# in May, and end on the last Sunday of September. 174275267Swollman 174375267Swollman# From Arthur David Olson (2001-01-25): 174475267Swollman# The 2001-01-24 traditional Washington Post contained the page one 174575267Swollman# story "Timely Issue Divides Mexicans."... 174675267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 174775267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 174875267Swollman# Mexico City and its 20 million residents on a different time than 174975267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 175075267Swollman# observation of Daylight Saving Time. 175175267Swollman 175275267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 175375267Swollman# Official statute published by the Energy Department 175475267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 175575267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 175675267Swollman 175775267Swollman# From Paul Eggert (2001-03-03): 175875267Swollman# 175975267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 176075267Swollman# James F. Smith writes in today's LA Times 176175267Swollman# </a> 176275267Swollman# * Sonora will continue to observe standard time. 176375267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 176475267Swollman# the Federal District will not adopt DST. 176575267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 176675267Swollman# * The decree does not affect federal-controlled facilities including 176775267Swollman# the airport, banks, hospitals, and schools. 176875267Swollman# 176975267Swollman# For now we'll assume that the Federal District will bow to federal rules. 177075267Swollman 177175267Swollman# From Jesper Norgaard (2001-04-01): 177275267Swollman# I found some references to the Mexican application of daylight 177375267Swollman# saving, which modifies what I had already sent you, stating earlier 177475267Swollman# that a number of northern Mexican states would go on daylight 177575267Swollman# saving. The modification reverts this to only cover Baja California 177675267Swollman# (Norte), while all other states (except Sonora, who has no daylight 177775267Swollman# saving all year) will follow the original decree of president 177875267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 177975267Swollman# September 30, 2001. 178075267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 178175267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 178275267Swollman 178386222Swollman# From Reuters (2001-09-04): 178486222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 178586222Swollman# unconstitutional in Mexico City, creating the possibility the 178686222Swollman# capital will be in a different time zone from the rest of the nation 178786222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 178886222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 178986222Swollman# standard time. "This is so residents of the Federal District are not 179086222Swollman# subject to unexpected time changes," a statement from the court said. 179186222Swollman 179293799Swollman# From Jesper Norgaard Welen (2002-03-12): 179393799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 179493799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 179593799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 179693799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 179793799Swollman 17982742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17992742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 18002742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 18012742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 18022742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 1803121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 18042742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 18052742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 18062742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 180775267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 180875267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 180993799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 181093799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 181193799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 181293799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 18132742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 181443014Swollman# Quintana Roo 181558787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 181675267Swollman -6:00 - CST 1981 Dec 23 181743543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 181843543Swollman -6:00 Mexico C%sT 181964499Swollman# Campeche, Yucatan 182064499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 182175267Swollman -6:00 - CST 1981 Dec 23 182264499Swollman -5:00 - EST 1982 Dec 2 182364499Swollman -6:00 Mexico C%sT 182464499Swollman# Coahuila, Durango, Nuevo Leon, Tamaulipas 182575267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 182664499Swollman -6:00 - CST 1988 182764499Swollman -6:00 US C%sT 1989 182864499Swollman -6:00 Mexico C%sT 182943014Swollman# Central Mexico 18302742SwollmanZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 18312742Swollman -7:00 - MST 1927 Jun 10 23:00 18322742Swollman -6:00 - CST 1930 Nov 15 18332742Swollman -7:00 - MST 1931 May 1 23:00 18342742Swollman -6:00 - CST 1931 Oct 183575267Swollman -7:00 - MST 1932 Apr 1 183686222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 183793799Swollman -6:00 - CST 2002 Feb 20 183893799Swollman -6:00 Mexico C%sT 183943014Swollman# Chihuahua 184058787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 184143014Swollman -7:00 - MST 1927 Jun 10 23:00 184243014Swollman -6:00 - CST 1930 Nov 15 184343014Swollman -7:00 - MST 1931 May 1 23:00 184443014Swollman -6:00 - CST 1931 Oct 184575267Swollman -7:00 - MST 1932 Apr 1 184643014Swollman -6:00 - CST 1996 184743014Swollman -6:00 Mexico C%sT 1998 184843014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 184943014Swollman -7:00 Mexico M%sT 185058787Sru# Sonora 185158787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 185258787Sru -7:00 - MST 1927 Jun 10 23:00 185358787Sru -6:00 - CST 1930 Nov 15 185458787Sru -7:00 - MST 1931 May 1 23:00 185558787Sru -6:00 - CST 1931 Oct 185675267Swollman -7:00 - MST 1932 Apr 1 185764499Swollman -6:00 - CST 1942 Apr 24 185858787Sru -7:00 - MST 1949 Jan 14 185958787Sru -8:00 - PST 1970 186058787Sru -7:00 Mexico M%sT 1999 186158787Sru -7:00 - MST 186264499Swollman# Baja California Sur, Nayarit, Sinaloa 18632742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 18642742Swollman -7:00 - MST 1927 Jun 10 23:00 18652742Swollman -6:00 - CST 1930 Nov 15 18662742Swollman -7:00 - MST 1931 May 1 23:00 18672742Swollman -6:00 - CST 1931 Oct 186875267Swollman -7:00 - MST 1932 Apr 1 186964499Swollman -6:00 - CST 1942 Apr 24 18702742Swollman -7:00 - MST 1949 Jan 14 18712742Swollman -8:00 - PST 1970 187214343Swollman -7:00 Mexico M%sT 187358787Sru# Baja California 18742742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 187575267Swollman -7:00 - MST 1924 18762742Swollman -8:00 - PST 1927 Jun 10 23:00 187775267Swollman -7:00 - MST 1930 Nov 15 187875267Swollman -8:00 - PST 1931 Apr 1 187975267Swollman -8:00 1:00 PDT 1931 Sep 30 188064499Swollman -8:00 - PST 1942 Apr 24 1881158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 1882158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 188375267Swollman -8:00 - PST 1948 Apr 5 188475267Swollman -8:00 1:00 PDT 1949 Jan 14 188575267Swollman -8:00 - PST 1954 188675267Swollman -8:00 CA P%sT 1961 188775267Swollman -8:00 - PST 1976 188814343Swollman -8:00 US P%sT 1996 188975267Swollman -8:00 Mexico P%sT 2001 189093799Swollman -8:00 US P%sT 2002 Feb 20 189193799Swollman -8:00 Mexico P%sT 1892158421Swollman# From Paul Eggert (2006-03-22): 189375267Swollman# Formerly there was an America/Ensenada zone, which differed from 189475267Swollman# America/Tijuana only in that it did not observe DST from 1976 1895158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 1896158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 189775267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 1898158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 189975267Swollman# DST-observance was a town-by-town matter back then. This concerns 190075267Swollman# data after 1970 so most likely there should be at least one Zone 190175267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 190275267Swollman# name or contents should be. 19032742Swollman# 19042742Swollman# Revillagigedo Is 19052742Swollman# no information 19062742Swollman 19072742Swollman############################################################################### 19082742Swollman 19092742Swollman# Anguilla 19102742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19112742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 19122742Swollman -4:00 - AST 19132742Swollman 19142742Swollman# Antigua and Barbuda 19152742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19162742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 19172742Swollman -5:00 - EST 1951 19182742Swollman -4:00 - AST 19192742Swollman 19202742Swollman# Bahamas 19212742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 19222742SwollmanRule Bahamas 1964 max - Oct lastSun 2:00 0 S 19232742SwollmanRule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D 19242742SwollmanRule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D 19252742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19262742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 19272742Swollman -5:00 Bahamas E%sT 19282742Swollman 19292742Swollman# Barbados 19302742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 19312742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 19322742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 19332742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 19342742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 19352742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 19362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19372742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 193843014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 19392742Swollman -4:00 Barb A%sT 19402742Swollman 19412742Swollman# Belize 1942158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 19432742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 19442742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 19452742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 19462742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 19472742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 19482742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 19492742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 19502742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19512742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 19522742Swollman -6:00 Belize C%sT 19532742Swollman 19542742Swollman# Bermuda 19552742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19562742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 19572742Swollman -4:00 - AST 1974 Apr 28 2:00 19582742Swollman -4:00 Bahamas A%sT 19592742Swollman 19602742Swollman# Cayman Is 19612742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19622742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 196343014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 19642742Swollman -5:00 - EST 19652742Swollman 19662742Swollman# Costa Rica 19672742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 19682742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 19692742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 197020094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 1971158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 1972158421Swollman# go with Shanks & Pottenger. 197320094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 197420094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 19752742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 19762742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19772742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 197858787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 19792742Swollman -6:00 CR C%sT 19802742Swollman# Coco 19812742Swollman# no information; probably like America/Costa_Rica 19822742Swollman 19832742Swollman# Cuba 19842742Swollman 198558787Sru# From Arthur David Olson (1999-03-29): 198658787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 198758787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 198858787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 198958787Sru# During the game, play-by-play announcer Jim Hunter noted that 199058787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 199158787Sru# Time today." (The "two hour" remark referred to losing one hour of 199258787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 199358787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 199458787Sru# returned to Baltimore, which switches on that date.) 19952742Swollman 1996138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 1997138323Swollman# Cuba is not going back to standard time this year. 1998158421Swollman# From Paul Eggert (2006-03-22): 1999138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2000138323Swollman# says that it's due to a problem at the Antonio Guiteras 2001138323Swollman# thermoelectric plant, and says "This October there will be no return 2002138323Swollman# to normal hours (after daylight saving time)". 2003158421Swollman# For now, let's assume that it's a temporary measure. 2004138323Swollman 2005153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2006153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2007153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2008153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2009153670Swollman 20102742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 20112742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 20122742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 20132742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 20142742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 20152742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 20162742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 20172742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 20182742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 20192742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 20202742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 20212742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 20222742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 20232742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 20242742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 20252742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 20262742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 20272742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 20282742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 202930711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 20302742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 20312742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 20322742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 203343014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 203420094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 203543014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 203643014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 203758787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2038138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 203958787SruRule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D 2040153670SwollmanRule Cuba 2006 max - Oct lastSun 0:00s 0 S 20412742Swollman 20422742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 20432742SwollmanZone America/Havana -5:29:28 - LMT 1890 204458787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 20452742Swollman -5:00 Cuba C%sT 20462742Swollman 20472742Swollman# Dominica 20482742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 20492742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 20502742Swollman -4:00 - AST 20512742Swollman 20522742Swollman# Dominican Republic 205375267Swollman 205475267Swollman# From Steffen Thorsen (2000-10-30): 205575267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 205675267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 205775267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 205875267Swollman 205975267Swollman# From Paul Eggert (2000-12-04): 206075267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 206175267Swollman 206275267Swollman# From Rives McDow (2000-12-01): 206375267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 206475267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 206575267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 206675267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 206775267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 206875267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 206975267Swollman# decided to revert. 207075267Swollman 207175267Swollman 20722742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 20732742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 20742742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 20752742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 20762742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 20772742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 20782742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 20792742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 20802742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 20812742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 20822742Swollman -5:00 DR E%sT 1974 Oct 27 208375267Swollman -4:00 - AST 2000 Oct 29 02:00 208475267Swollman -5:00 US E%sT 2000 Dec 3 01:00 20852742Swollman -4:00 - AST 20862742Swollman 20872742Swollman# El Salvador 2088158421Swollman 2089158421Swollman# From Paul Eggert (2006-05-05): 2090158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2091158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 2092158421Swollman# months until September, and a 2006-05-03 NACION article saying El 2093158421Swollman# Salvador will follow suit. However, ignore this for now, because: 2094158421Swollman# From Jesper Norgaard Welen (2005-05-05): 2095158421Swollman# Change of DST perhaps postponed in El Salvador: 2096158421Swollman# http://www.laprensagrafica.com/lodeldia/883.asp 2097158421Swollman 20982742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 20992742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 21002742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 2101121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 2102121098Swollman# instead of America/San_Salvador. 21032742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21042742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 21052742Swollman -6:00 Salv C%sT 21062742Swollman 21072742Swollman# Grenada 21082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 210919878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 21102742Swollman -4:00 - AST 21112742Swollman 21122742Swollman# Guadeloupe 21132742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21142742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 21152742Swollman -4:00 - AST 21162742Swollman 21172742Swollman# Guatemala 2118158421Swollman# 2119158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2120158421Swollman# Diario Co Latino, at 2121158421Swollman# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2122158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 2123158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 2124158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 2125158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 21262742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 21272742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 21282742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 21292742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 21302742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 213120094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 213220094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 2133158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 2134158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 21352742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21362742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 21372742Swollman -6:00 Guat C%sT 21382742Swollman 21392742Swollman# Haiti 2140149514Swollman# From Gwillim Law (2005-04-15): 2141149514Swollman# Risto O. Nykanen wrote me that Haiti is now on DST. 2142149514Swollman# I searched for confirmation, and I found a 2143149514Swollman# <a href="http://www.haitianconsulate.org/time.doc"> press release 2144149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2145149514Swollman# </a>. Translated from French, it says: 2146149514Swollman# 2147149514Swollman# "The Prime Minister's Communication Office notifies the public in general 2148149514Swollman# and the press in particular that, following a decision of the Interior 2149149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 2150149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 2151149514Swollman# Saturday the 2nd to Sunday the 3rd. 2152149514Swollman# 2153149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 2154149514Swollman# the population that the country's clocks will be set forward one hour 2155149514Swollman# starting at midnight. This provision will hold until the last Saturday in 2156149514Swollman# October 2005. 2157149514Swollman# 2158149514Swollman# "Port-au-Prince, March 31, 2005" 2159158421Swollman# 2160158421Swollman# From Steffen Thorsen (2006-04-04): 2161158421Swollman# I have been informed by users that Haiti observes DST this year like 2162158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 2163158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 2164158421Swollman# next year or if they will extend their DST like US/Canada next year). 2165158421Swollman# 2166158421Swollman# I have found this article about it (in French): 2167158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2168158421Swollman# 2169158421Swollman# The reason seems to be an energy crisis. 2170149514Swollman 2171158421Swollman 21722742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 21732742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 21742742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 21752742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2176158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2177158421Swollman# Go with IATA. 217843014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 217943014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2180158421SwollmanRule Haiti 2005 max - Apr Sun>=1 0:00 1:00 D 2181158421SwollmanRule Haiti 2005 max - Oct lastSun 0:00 0 S 21822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21832742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 21842742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 21852742Swollman -5:00 Haiti E%sT 21862742Swollman 21872742Swollman# Honduras 2188158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2189158421Swollman 2190158421Swollman# From Paul Eggert (2006-05-05): 2191158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2192158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 2193158421Swollman# months until September. La Tribuna reported today 2194158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2195158421Swollman# of Honduras, refused to back down on this. For lack of better info, 2196158421Swollman# assume they'll use the same end-of-DST rules as in 1987 and 1988. 2197158421Swollman 2198158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2199158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2200158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 2201158421SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 2202158421SwollmanRule Hond 2006 only - Sep lastSun 0:00 0 S 22032742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 22042742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 2205158421Swollman -6:00 Hond C%sT 220643543Swollman# 220743543Swollman# Great Swan I ceded by US to Honduras in 1972 22082742Swollman 22092742Swollman# Jamaica 22102742Swollman 221119878Swollman# From Bob Devine (1988-01-28): 22122742Swollman# Follows US rules. 22132742Swollman 221419878Swollman# From U. S. Naval Observatory (1989-01-19): 22152742Swollman# JAMAICA 5 H BEHIND UTC 22162742Swollman 2217158421Swollman# From Shanks & Pottenger: 22182742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 22192742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 222043014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 222158787Sru -5:00 - EST 1974 Apr 28 2:00 222220094Swollman -5:00 US E%sT 1984 222320094Swollman -5:00 - EST 22242742Swollman 22252742Swollman# Martinique 22262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 22272742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 222886222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 22292742Swollman -4:00 - AST 1980 Apr 6 22302742Swollman -4:00 1:00 ADT 1980 Sep 28 22312742Swollman -4:00 - AST 22322742Swollman 22332742Swollman# Montserrat 2234158421Swollman# From Paul Eggert (2006-03-22): 2235158421Swollman# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 2236158421Swollman# world.gazetteer.com says Cork Hill is the most populous location now. 22372742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2238158421SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 22392742Swollman -4:00 - AST 22402742Swollman 22412742Swollman# Nicaragua 224243543Swollman# 2243158421Swollman# This uses Shanks & Pottenger for times before 2005. 224443543Swollman# 2245149514Swollman# From Steffen Thorsen (2005-04-12): 2246149514Swollman# I've got reports from 8 different people that Nicaragua just started 2247149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 2248149514Swollman# expensive petroleum. The exact end date for DST is not yet 2249149514Swollman# announced, only "September" but some sites also say "mid-September". 2250149514Swollman# Some background information is available on the President's official site: 2251149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 2252149514Swollman# The Decree, no 23-2005 is available here: 2253149514Swollman# 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 2254149514Swollman# 2255149514Swollman# From Paul Eggert (2005-05-01): 2256149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 2257158421Swollman# assume that it is daylight saving.... 2258149514Swollman# 2259149514Swollman# From Gwillim Law (2005-04-21): 2260149514Swollman# The Associated Press story on the time change, which can be found at 2261149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 2262149514Swollman# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 2263149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 2264149514Swollman# during the Arnoldo Aleman administration."... 2265149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 2266149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 2267149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 2268149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 2269149514Swollman# 2270153670Swollman# From Jesper Norgaard Welen (2005-11-02): 2271153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 2272153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 2273153670Swollman# (2005-09-26) 2274153670Swollman# 2275158421Swollman# From Jesper Norgaard Welen (2006-05-05): 2276158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 2277158421Swollman# (my informal translation) 2278158421Swollman# By order of the president of the republic, Enrique Bolanos, Nicaragua 2279158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 2280158421Swollman# morning, and will stay that way until 30.th. of september. 2281158421Swollman# 22822742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 22832742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 22842742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 2285149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 2286158421SwollmanRule Nic 2005 2006 - Oct Sun>=1 0:00 0 S 2287158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 22882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 22892742SwollmanZone America/Managua -5:45:08 - LMT 1890 229086222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 22912742Swollman -6:00 - CST 1973 May 22922742Swollman -5:00 - EST 1975 Feb 16 2293158421Swollman -6:00 Nic C%sT 1992 Jan 1 4:00 2294158421Swollman -5:00 - EST 1992 Sep 24 2295158421Swollman -6:00 - CST 1993 2296158421Swollman -5:00 - EST 1997 2297149514Swollman -6:00 Nic C%sT 22982742Swollman 22992742Swollman# Panama 23002742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23012742SwollmanZone America/Panama -5:18:08 - LMT 1890 230286222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 23032742Swollman -5:00 - EST 23042742Swollman 23052742Swollman# Puerto Rico 23062742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 23072742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 230814343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 23092742Swollman -4:00 - AST 1942 May 3 2310158421Swollman -4:00 US A%sT 1946 23112742Swollman -4:00 - AST 23122742Swollman 23132742Swollman# St Kitts-Nevis 23142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23152742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 23162742Swollman -4:00 - AST 23172742Swollman 23182742Swollman# St Lucia 23192742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23202742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 232186222Swollman -4:04:00 - CMT 1912 # Castries Mean Time 23222742Swollman -4:00 - AST 23232742Swollman 23242742Swollman# St Pierre and Miquelon 23252742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 23262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23272742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 23282742Swollman -4:00 - AST 1980 May 2329121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 2330121098Swollman -3:00 Canada PM%sT 23312742Swollman 23322742Swollman# St Vincent and the Grenadines 23332742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23342742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 233543014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 23362742Swollman -4:00 - AST 23372742Swollman 23382742Swollman# Turks and Caicos 2339158421Swollman# From Paul Eggert (2006-03-22): 2340158421Swollman# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 234120094Swollman# says they switch at midnight. Go with IATA SSIM. 234220094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 234320094SwollmanRule TC 1979 1986 - Apr lastSun 0:00 1:00 D 234420094SwollmanRule TC 1979 max - Oct lastSun 0:00 0 S 234520094SwollmanRule TC 1987 max - Apr Sun>=1 0:00 1:00 D 23462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23472742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 234843014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 234920094Swollman -5:00 TC E%sT 23508029Swollman 235114343Swollman# British Virgin Is 23522742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 235314343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 23542742Swollman -4:00 - AST 23558029Swollman 235614343Swollman# Virgin Is 235714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 235814343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 235914343Swollman -4:00 - AST 2360