1 # 2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 # 4 # This code is free software; you can redistribute it and/or modify it 5 # under the terms of the GNU General Public License version 2 only, as 6 # published by the Free Software Foundation. Oracle designates this 7 # particular file as subject to the "Classpath" exception as provided 8 # by Oracle in the LICENSE file that accompanied this code. 9 # 10 # This code is distributed in the hope that it will be useful, but WITHOUT 11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 # version 2 for more details (a copy is included in the LICENSE file that 14 # accompanied this code). 15 # 16 # You should have received a copy of the GNU General Public License version 17 # 2 along with this work; if not, write to the Free Software Foundation, 18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 # 20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 # or visit www.oracle.com if you need additional information or have any 22 # questions. 23 # 24 # <pre> 25 # This file is in the public domain, so clarified as of 26 # 2009-05-17 by Arthur David Olson. 27 28 # also includes Central America and the Caribbean 29 30 # This data is by no means authoritative; if you think you know better, 31 # go ahead and edit the file (and please send any changes to 32 # tz@elsie.nci.nih.gov for general use in the future). 33 34 # From Paul Eggert (1999-03-22): 35 # A reliable and entertaining source about time zones is 36 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 37 38 ############################################################################### 39 40 # United States 41 42 # From Paul Eggert (1999-03-31): 43 # Howse writes (pp 121-125) that time zones were invented by 44 # Professor Charles Ferdinand Dowd (1825-1904), 45 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 46 # His pamphlet ``A System of National Time for Railroads'' (1870) 47 # was the result of his proposals at the Convention of Railroad Trunk Lines 48 # in New York City (1869-10). His 1870 proposal was based on Washington, DC, 49 # but in 1872-05 he moved the proposed origin to Greenwich. 50 # His proposal was adopted by the railroads on 1883-11-18 at 12:00, 51 # and the most of the country soon followed suit. 52 53 # From Paul Eggert (2005-04-16): 54 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 55 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 56 57 # From Paul Eggert (2006-03-22): 58 # A good source for time zone historical data in the US is 59 # Thomas G. Shanks, The American Atlas (5th edition), 60 # San Diego: ACS Publications, Inc. (1991). 61 # Make sure you have the errata sheet; the book is somewhat useless without it. 62 # It is the source for most of the pre-1991 US entries below. 63 64 # From Paul Eggert (2001-03-06): 65 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin 66 # in his whimsical essay ``An Economical Project for Diminishing the Cost 67 # of Light'' published in the Journal de Paris (1784-04-26). 68 # Not everyone is happy with the results: 69 # 70 # I don't really care how time is reckoned so long as there is some 71 # agreement about it, but I object to being told that I am saving 72 # daylight when my reason tells me that I am doing nothing of the kind. 73 # I even object to the implication that I am wasting something 74 # valuable if I stay in bed after the sun has risen. As an admirer 75 # of moonlight I resent the bossy insistence of those who want to 76 # reduce my time for enjoying it. At the back of the Daylight Saving 77 # scheme I detect the bony, blue-fingered hand of Puritanism, eager 78 # to push people into bed earlier, and get them up earlier, to make 79 # them healthy, wealthy and wise in spite of themselves. 80 # 81 # -- Robertson Davies, The diary of Samuel Marchbanks, 82 # Clarke, Irwin (1947), XIX, Sunday 83 # 84 # For more about the first ten years of DST in the United States, see 85 # Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 86 # Ten years of daylight saving from the Pittsburgh standpoint 87 # (Carnegie Library of Pittsburgh, 1927)</a>. 88 # 89 # Shanks says that DST was called "War Time" in the US in 1918 and 1919. 90 # However, DST was imposed by the Standard Time Act of 1918, which 91 # was the first nationwide legal time standard, and apparently 92 # time was just called "Standard Time" or "Daylight Saving Time". 93 94 # From Arthur David Olson: 95 # US Daylight Saving Time ended on the last Sunday of *October* in 1974. 96 # See, for example, the front page of the Saturday, 1974-10-26 97 # and Sunday, 1974-10-27 editions of the Washington Post. 98 99 # From Arthur David Olson: 100 # Before the Uniform Time Act of 1966 took effect in 1967, observance of 101 # Daylight Saving Time in the US was by local option, except during wartime. 102 103 # From Arthur David Olson (2000-09-25): 104 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 105 # In the introduction, Oboler spoke of "Eastern Peace Time." 106 # An AltaVista search turned up 107 # <a href="http://rowayton.org/rhs/hstaug45.html">: 108 # "When the time is announced over the radio now, it is 'Eastern Peace 109 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 110 # </a> (August 1945) by way of confirmation. 111 112 # From Joseph Gallant citing 113 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 114 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 115 # to switch to London for Attlee's address, but the American people 116 # never got to hear his speech live. According to one press account, 117 # CBS' Bob Trout was first to announce the word of Japan's surrender, 118 # but a few seconds later, NBC, ABC and Mutual also flashed the word 119 # of surrender, all of whom interrupting the bells of Big Ben in 120 # London which were to precede Mr. Attlee's speech. 121 122 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 123 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 124 # 125 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 126 # Any announcement from Asia would reach St. John's New York newsroom on a 127 # wire service teletype machine, which had prescribed signals for major news. 128 # Associated Press, for example, would ring five bells before spewing out 129 # typed copy of an important story, and 10 bells for news "of transcendental 130 # importance." 131 # 132 # On Aug. 14, stalling while talking steadily into the NBC networks' open 133 # microphone, St. John heard five bells and waited only to hear a sixth bell, 134 # before announcing confidently: "Ladies and gentlemen, World War II is over. 135 # The Japanese have agreed to our surrender terms." 136 # 137 # He had scored a 20-second scoop on other broadcasters. 138 139 # From Arthur David Olson (2005-08-22): 140 # Paul has been careful to use the "US" rules only in those locations 141 # that are part of the United States; this reflects the real scope of 142 # U.S. government action. So even though the "US" rules have changed 143 # in the latest release, other countries won't be affected. 144 145 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 146 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 147 Rule US 1918 1919 - Oct lastSun 2:00 0 S 148 Rule US 1942 only - Feb 9 2:00 1:00 W # War 149 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 150 Rule US 1945 only - Sep 30 2:00 0 S 151 Rule US 1967 2006 - Oct lastSun 2:00 0 S 152 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 153 Rule US 1974 only - Jan 6 2:00 1:00 D 154 Rule US 1975 only - Feb 23 2:00 1:00 D 155 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 156 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 157 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 158 Rule US 2007 max - Nov Sun>=1 2:00 0 S 159 160 # From Arthur David Olson, 2005-12-19 161 # We generate the files specified below to guard against old files with 162 # obsolete information being left in the time zone binary directory. 163 # We limit the list to names that have appeared in previous versions of 164 # this time zone package. 165 # We do these as separate Zones rather than as Links to avoid problems if 166 # a particular place changes whether it observes DST. 167 # We put these specifications here in the northamerica file both to 168 # increase the chances that they'll actually get compiled and to 169 # avoid the need to duplicate the US rules in another file. 170 171 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 172 Zone EST -5:00 - EST 173 Zone MST -7:00 - MST 174 Zone HST -10:00 - HST 175 Zone EST5EDT -5:00 US E%sT 176 Zone CST6CDT -6:00 US C%sT 177 Zone MST7MDT -7:00 US M%sT 178 Zone PST8PDT -8:00 US P%sT 179 180 # From Bob Devine (1988-01-28): 181 # ...Alaska (and Hawaii) had the timezone names changed in 1967. 182 # old new 183 # Pacific Standard Time(PST) -same- 184 # Yukon Standard Time(YST) -same- 185 # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 186 # Nome Standard Time (NT) Bering Standard Time (BST) 187 # 188 # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 189 # The YST zone now covers nearly all of the state, AHST just part 190 # of the Aleutian islands. No DST. 191 192 # From Paul Eggert (1995-12-19): 193 # The tables below use `NST', not `NT', for Nome Standard Time. 194 # I invented `CAWT' for Central Alaska War Time. 195 196 # From U. S. Naval Observatory (1989-01-19): 197 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 198 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 199 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 200 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 201 # USA MOUNTAIN 7 H BEHIND UTC DENVER 202 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 203 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 204 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 205 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 206 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 207 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 208 # USA - " - 9 H BEHIND UTC APR 3 - OCT 30 209 # USA HAWAII 10 H BEHIND UTC 210 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 211 212 # From Arthur David Olson (1989-01-21): 213 # The above dates are for 1988. 214 # Note the "AKST" and "AKDT" abbreviations, the claim that there's 215 # no DST in Samoa, and the claim that there is DST in Alaska and the 216 # Aleutians. 217 218 # From Arthur David Olson (1988-02-13): 219 # Legal standard time zone names, from United States Code (1982 Edition and 220 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 221 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 222 # took effect), as explained in sections 263 and 261: 223 # (none) 224 # United States standard eastern time 225 # United States standard mountain time 226 # United States standard central time 227 # United States standard Pacific time 228 # (none) 229 # United States standard Alaska time 230 # (none) 231 # Next, names from 1967-04-01 until 1983-11-30 (the date for 232 # public law 98-181): 233 # Atlantic standard time 234 # eastern standard time 235 # central standard time 236 # mountain standard time 237 # Pacific standard time 238 # Yukon standard time 239 # Alaska-Hawaii standard time 240 # Bering standard time 241 # And after 1983-11-30: 242 # Atlantic standard time 243 # eastern standard time 244 # central standard time 245 # mountain standard time 246 # Pacific standard time 247 # Alaska standard time 248 # Hawaii-Aleutian standard time 249 # Samoa standard time 250 # The law doesn't give abbreviations. 251 # 252 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 253 # Public law 106-564 (2000-12-23) introduced the abbreviation 254 # "Chamorro Standard Time" for time in Guam and the Northern Marianas. 255 # See the file "australasia". 256 257 # From Arthur David Olson, 2005-08-09 258 # The following was signed into law on 2005-08-08. 259 # 260 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 261 # (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 262 # U.S.C. 260a(a)) is amended-- 263 # (1) by striking `first Sunday of April' and inserting `second 264 # Sunday of March'; and 265 # (2) by striking `last Sunday of October' and inserting `first 266 # Sunday of November'. 267 # (b) Effective Date- Subsection (a) shall take effect 1 year after the 268 # date of enactment of this Act or March 1, 2007, whichever is later. 269 # (c) Report to Congress- Not later than 9 months after the effective 270 # date stated in subsection (b), the Secretary shall report to Congress 271 # on the impact of this section on energy consumption in the United 272 # States. 273 # (d) Right to Revert- Congress retains the right to revert the 274 # Daylight Saving Time back to the 2005 time schedules once the 275 # Department study is complete. 276 277 # US eastern time, represented by New York 278 279 # Connecticut, Delaware, District of Columbia, most of Florida, 280 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 281 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 282 # New Hampshire, New Jersey, New York, North Carolina, Ohio, 283 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 284 # Vermont, Virginia, West Virginia 285 286 # From Dave Cantor (2004-11-02): 287 # Early this summer I had the occasion to visit the Mount Washington 288 # Observatory weather station atop (of course!) Mount Washington [, NH].... 289 # One of the staff members said that the station was on Eastern Standard Time 290 # and didn't change their clocks for Daylight Saving ... so that their 291 # reports will always have times which are 5 hours behind UTC. 292 293 # From Paul Eggert (2005-08-26): 294 # According to today's Huntsville Times 295 # <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 296 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City 297 # in Russell County, Lanett in Chambers County and some towns in Lee County, 298 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 299 # Roberts, city administrator in Phenix City. as saying "We are in the Central 300 # time zone, but we do go by the Eastern time zone because so many people work 301 # in Columbus." 302 303 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 304 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 305 Rule NYC 1920 only - Oct lastSun 2:00 0 S 306 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 307 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 308 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 309 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 310 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 311 -5:00 US E%sT 1920 312 -5:00 NYC E%sT 1942 313 -5:00 US E%sT 1946 314 -5:00 NYC E%sT 1967 315 -5:00 US E%sT 316 317 # US central time, represented by Chicago 318 319 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 320 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 321 # Washington counties), Illinois, western Indiana 322 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 323 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 324 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 325 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 326 # western Tennessee, most of Texas, Wisconsin 327 328 # From Larry M. Smith (2006-04-26) re Wisconsin: 329 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 330 # is currently enforced at the 01:00 time of change. Because the local 331 # "bar time" in the state corresponds to 02:00, a number of citations 332 # are issued for the "sale of class 'B' alcohol after prohibited 333 # hours" within the deviated hour of this change every year.... 334 # 335 # From Douglas R. Bomberg (2007-03-12): 336 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 337 # Statue 175 closer in synch with the US Congress' intent.... 338 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 339 340 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 341 Rule Chicago 1920 only - Jun 13 2:00 1:00 D 342 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 343 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 344 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 345 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 346 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 347 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 348 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 349 -6:00 US C%sT 1920 350 -6:00 Chicago C%sT 1936 Mar 1 2:00 351 -5:00 - EST 1936 Nov 15 2:00 352 -6:00 Chicago C%sT 1942 353 -6:00 US C%sT 1946 354 -6:00 Chicago C%sT 1967 355 -6:00 US C%sT 356 # Oliver County, ND switched from mountain to central time on 1992-10-25. 357 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 358 -7:00 US M%sT 1992 Oct 25 02:00 359 -6:00 US C%sT 360 # Morton County, ND, switched from mountain to central time on 361 # 2003-10-26, except for the area around Mandan which was already central time. 362 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 363 # Officially this switch also included part of Sioux County, and 364 # Jones, Mellette, and Todd Counties in South Dakota; 365 # but in practice these other counties were already observing central time. 366 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 367 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 368 -7:00 US M%sT 2003 Oct 26 02:00 369 -6:00 US C%sT 370 371 # From Josh Findley (2011-01-21): 372 # ...it appears that Mercer County, North Dakota, changed from the 373 # mountain time zone to the central time zone at the last transition from 374 # daylight-saving to standard time (on Nov. 7, 2010): 375 # <a href="http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm"> 376 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 377 # </a> 378 # <a href="http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html"> 379 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 380 # </a> 381 382 # From Andy Lipscomb (2011-01-24): 383 # ...according to the Census Bureau, the largest city is Beulah (although 384 # it's commonly referred to as Beulah-Hazen, with Hazen being the next 385 # largest city in Mercer County). Google Maps places Beulah's city hall 386 # at 4715'51" north, 10146'40" west, which yields an offset of 6h47'07". 387 388 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 389 -7:00 US M%sT 2010 Nov 7 2:00 390 -6:00 US C%sT 391 392 # US mountain time, represented by Denver 393 # 394 # Colorado, far western Kansas, Montana, western 395 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 396 # New Mexico, southwestern North Dakota, 397 # western South Dakota, far western Texas (El Paso County, Hudspeth County, 398 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 399 # 400 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 401 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 402 Rule Denver 1920 only - Oct lastSun 2:00 0 S 403 Rule Denver 1921 only - May 22 2:00 0 S 404 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 405 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 406 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 407 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 408 -7:00 US M%sT 1920 409 -7:00 Denver M%sT 1942 410 -7:00 US M%sT 1946 411 -7:00 Denver M%sT 1967 412 -7:00 US M%sT 413 414 # US Pacific time, represented by Los Angeles 415 # 416 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 417 # Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 418 # and the northern three-quarters of Idaho county), 419 # most of Nevada, most of Oregon, and Washington 420 # 421 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 422 Rule CA 1948 only - Mar 14 2:00 1:00 D 423 Rule CA 1949 only - Jan 1 2:00 0 S 424 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 425 Rule CA 1950 1961 - Sep lastSun 2:00 0 S 426 Rule CA 1962 1966 - Oct lastSun 2:00 0 S 427 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 428 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 429 -8:00 US P%sT 1946 430 -8:00 CA P%sT 1967 431 -8:00 US P%sT 432 433 # Alaska 434 # AK%sT is the modern abbreviation for -9:00 per USNO. 435 # 436 # From Paul Eggert (2001-05-30): 437 # Howse writes that Alaska switched from the Julian to the Gregorian calendar, 438 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 439 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 440 # also a Friday. Include only the time zone part of this transition, 441 # ignoring the switch from Julian to Gregorian, since we can't represent 442 # the Julian calendar. 443 # 444 # As far as we know, none of the exact locations mentioned below were 445 # permanently inhabited in 1867 by anyone using either calendar. 446 # (Yakutat was colonized by the Russians in 1799, but the settlement 447 # was destroyed in 1805 by a Yakutat-kon war party.) However, there 448 # were nearby inhabitants in some cases and for our purposes perhaps 449 # it's best to simply use the official transition. 450 # 451 452 # From Steve Ferguson (2011-01-31): 453 # The author lives in Alaska and many of the references listed are only 454 # available to Alaskan residents. 455 # 456 # <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98"> 457 # http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98 458 # </a> 459 460 # From Arthur David Olson (2011-02-01): 461 # Here's database-relevant material from the 2001 "Alaska History" article: 462 # 463 # On September 20 [1979]...DOT...officials decreed that on April 27, 464 # 1980, Juneau and other nearby communities would move to Yukon Time. 465 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 466 # Pacific Time. 467 # 468 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 469 # Department's September 1979 decision. Juneau and other communities in 470 # northern Southeast reverted to Pacific Time on October 26. 471 # 472 # On October 28 [1983]...the Metlakatla Indian Community Council voted 473 # unanimously to keep the reservation on Pacific Time. 474 # 475 # According to DOT official Joanne Petrie, Indian reservations are not 476 # bound to follow time zones imposed by neighboring jurisdictions. 477 # 478 # (The last is consistent with how the database now handles the Navajo 479 # Nation.) 480 481 # From Arthur David Olson (2011-02-09): 482 # I just spoke by phone with a staff member at the Metlakatla Indian 483 # Community office (using contact information available at 484 # <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla"> 485 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 486 # </a>). 487 # It's shortly after 1:00 here on the east coast of the United States; 488 # the staffer said it was shortly after 10:00 there. When I asked whether 489 # that meant they were on Pacific time, they said no--they were on their 490 # own time. I asked about daylight saving; they said it wasn't used. I 491 # did not inquire about practices in the past. 492 493 # From Arthur David Olson (2011-08-17): 494 # For lack of better information, assume that Metlakatla's 495 # abandonment of use of daylight saving resulted from the 1983 vote. 496 497 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 498 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 499 -8:57:41 - LMT 1900 Aug 20 12:00 500 -8:00 - PST 1942 501 -8:00 US P%sT 1946 502 -8:00 - PST 1969 503 -8:00 US P%sT 1980 Apr 27 2:00 504 -9:00 US Y%sT 1980 Oct 26 2:00 505 -8:00 US P%sT 1983 Oct 30 2:00 506 -9:00 US Y%sT 1983 Nov 30 507 -9:00 US AK%sT 508 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 509 -9:01:13 - LMT 1900 Aug 20 12:00 510 -8:00 - PST 1942 511 -8:00 US P%sT 1946 512 -8:00 - PST 1969 513 -8:00 US P%sT 1983 Oct 30 2:00 514 -9:00 US Y%sT 1983 Nov 30 515 -9:00 US AK%sT 516 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 517 -8:46:18 - LMT 1900 Aug 20 12:00 518 -8:00 - PST 1942 519 -8:00 US P%sT 1946 520 -8:00 - PST 1969 521 -8:00 US P%sT 1983 Oct 30 2:00 522 -8:00 - MeST 523 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 524 -9:18:55 - LMT 1900 Aug 20 12:00 525 -9:00 - YST 1942 526 -9:00 US Y%sT 1946 527 -9:00 - YST 1969 528 -9:00 US Y%sT 1983 Nov 30 529 -9:00 US AK%sT 530 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 531 -9:59:36 - LMT 1900 Aug 20 12:00 532 -10:00 - CAT 1942 533 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 534 -10:00 US CAT/CAPT 1946 # Peace 535 -10:00 - CAT 1967 Apr 536 -10:00 - AHST 1969 537 -10:00 US AH%sT 1983 Oct 30 2:00 538 -9:00 US Y%sT 1983 Nov 30 539 -9:00 US AK%sT 540 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 541 -11:01:38 - LMT 1900 Aug 20 12:00 542 -11:00 - NST 1942 543 -11:00 US N%sT 1946 544 -11:00 - NST 1967 Apr 545 -11:00 - BST 1969 546 -11:00 US B%sT 1983 Oct 30 2:00 547 -9:00 US Y%sT 1983 Nov 30 548 -9:00 US AK%sT 549 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 550 -11:46:38 - LMT 1900 Aug 20 12:00 551 -11:00 - NST 1942 552 -11:00 US N%sT 1946 553 -11:00 - NST 1967 Apr 554 -11:00 - BST 1969 555 -11:00 US B%sT 1983 Oct 30 2:00 556 -10:00 US AH%sT 1983 Nov 30 557 -10:00 US HA%sT 558 # The following switches don't quite make our 1970 cutoff. 559 # 560 # Shanks writes that part of southwest Alaska (e.g. Aniak) 561 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 562 # and another part (e.g. Akiak) made the same switch five weeks later. 563 # 564 # From David Flater (2004-11-09): 565 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 566 # Historic Preservation Commission, provided this information, which 567 # suggests that Unalaska deviated from statutory time from early 1967 568 # possibly until 1983: 569 # 570 # Minutes of the Unalaska City Council Meeting, January 10, 1967: 571 # "Except for St. Paul and Akutan, Unalaska is the only important 572 # location not on Alaska Standard Time. The following resolution was 573 # made by William Robinson and seconded by Henry Swanson: Be it 574 # resolved that the City of Unalaska hereby goes to Alaska Standard 575 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 576 # January 14, Alaska Standard Time.) This resolution was passed with 577 # three votes for and one against." 578 579 # Hawaii 580 581 # From Arthur David Olson (2010-12-09): 582 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 583 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 584 # the article is available at 585 # <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> 586 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 587 # </a> 588 # and indicates that standard time was adopted effective noon, January 589 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 590 # saving for the period between the last Sunday of each April and the 591 # last Sunday of each September, but less than a month later repealed the 592 # act," (page 220), that year-round daylight saving time was in effect 593 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 594 # when clocks changed) and that clocks were changed by 30 minutes 595 # effective the second Sunday of June, 1947 (page 219, with no time of 596 # day given for when clocks changed). A footnote for the 1933 changes 597 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 598 # and Act 163 (approved 21 May 1933)." 599 600 # From Arthur David Olson (2011-01-19): 601 # The following is from "Laws of the Territory of Hawaii Passed by the 602 # Seventeenth Legislature: Regular Session 1933," available (as of 603 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act 604 # 90...At 2 o'clock ante meridian of the last Sunday in April of each 605 # year, the standard time of this Territory shall be advanced one 606 # hour...This Act shall take effect upon its approval. Approved this 26th 607 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 608 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 609 # hereby repealed...This Act shall take effect upon its approval, upon 610 # which date the standard time of this Territory shall be restored to 611 # that existing immediately prior to the taking effect of said Act 90. 612 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 613 # of the Territory of Hawaii." 614 # 615 # Note that 1933-05-21 was a Sunday. 616 # We're left to guess the time of day when Act 163 was approved; guess noon. 617 618 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 619 -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 620 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 621 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 622 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 623 -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 624 -10:00 - HST 625 626 # Now we turn to US areas that have diverged from the consensus since 1970. 627 628 # Arizona mostly uses MST. 629 630 # From Paul Eggert (2002-10-20): 631 # 632 # The information in the rest of this paragraph is derived from the 633 # <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 634 # Daylight Saving Time web page (2002-01-23)</a> maintained by the 635 # Arizona State Library, Archives and Public Records. 636 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 637 # time, but by federal law railroads, airlines, bus lines, military 638 # personnel, and some engaged in interstate commerce continued to 639 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 640 # Gazette says that was the date the law changed, and that 04-01 was 641 # the date the state's clocks would change. In 1945 the State of 642 # Arizona used standard time all year, again with exceptions only as 643 # mandated by federal law. Arizona observed DST in 1967, but Arizona 644 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 645 # 646 # Shanks says the 1944 experiment came to an end on 1944-03-17. 647 # Go with the Arizona State Library instead. 648 649 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 650 -7:00 US M%sT 1944 Jan 1 00:01 651 -7:00 - MST 1944 Apr 1 00:01 652 -7:00 US M%sT 1944 Oct 1 00:01 653 -7:00 - MST 1967 654 -7:00 US M%sT 1968 Mar 21 655 -7:00 - MST 656 # From Arthur David Olson (1988-02-13): 657 # A writer from the Inter Tribal Council of Arizona, Inc., 658 # notes in private correspondence dated 1987-12-28 that "Presently, only the 659 # Navajo Nation participates in the Daylight Saving Time policy, due to its 660 # large size and location in three states." (The "only" means that other 661 # tribal nations don't use DST.) 662 663 Link America/Denver America/Shiprock 664 665 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 666 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 667 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 668 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 669 # Teton, Twin Falls, Valley, Washington counties, and the southern 670 # quarter of Idaho county) and eastern Oregon (most of Malheur County) 671 # switched four weeks late in 1974. 672 # 673 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 674 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 675 -8:00 US P%sT 1923 May 13 2:00 676 -7:00 US M%sT 1974 677 -7:00 - MST 1974 Feb 3 2:00 678 -7:00 US M%sT 679 680 # Indiana 681 # 682 # For a map of Indiana's time zone regions, see: 683 # <a href="http://www.mccsc.edu/time.html"> 684 # What time is it in Indiana? 685 # </a> (2006-03-01) 686 # 687 # From Paul Eggert (2007-08-17): 688 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 689 # with the following exceptions: 690 # 691 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 692 # Vandenburgh, and Warrick counties have been like America/Chicago. 693 # 694 # - Dearborn and Ohio counties have been like America/New_York. 695 # 696 # - Clark, Floyd, and Harrison counties have been like 697 # America/Kentucky/Louisville. 698 # 699 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 700 # and Switzerland counties have their own time zone histories as noted below. 701 # 702 # Shanks partitioned Indiana into 345 regions, each with its own time history, 703 # and wrote ``Even newspaper reports present contradictory information.'' 704 # Those Hoosiers! Such a flighty and changeable people! 705 # Fortunately, most of the complexity occurred before our cutoff date of 1970. 706 # 707 # Other than Indianapolis, the Indiana place names are so nondescript 708 # that they would be ambiguous if we left them at the `America' level. 709 # So we reluctantly put them all in a subdirectory `America/Indiana'. 710 711 # From Paul Eggert (2005-08-16): 712 # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 713 714 # From Nathan Stratton Treadway (2006-03-30): 715 # http://www.dot.gov/affairs/dot0406.htm [3705 B] 716 # From Deborah Goldsmith (2006-01-18): 717 # http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 718 # From Paul Eggert (2006-01-20): 719 # It says "DOT is relocating the time zone boundary in Indiana to move Starke, 720 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 721 # Eastern Time Zone to the Central Time Zone.... The effective date of 722 # this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 723 # changeover date from standard time to Daylight Saving Time." 724 # Strictly speaking, this means the affected counties will change their 725 # clocks twice that night, but this obviously is in error. The intent 726 # is that 01:59:59 EST be followed by 02:00:00 CDT. 727 728 # From Gwillim Law (2007-02-10): 729 # The Associated Press has been reporting that Pulaski County, Indiana is 730 # going to switch from Central to Eastern Time on March 11, 2007.... 731 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 732 733 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 734 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 735 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 736 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 737 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 738 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 739 -6:00 US C%sT 1920 740 -6:00 Indianapolis C%sT 1942 741 -6:00 US C%sT 1946 742 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 743 -5:00 - EST 1957 Sep 29 2:00 744 -6:00 - CST 1958 Apr 27 2:00 745 -5:00 - EST 1969 746 -5:00 US E%sT 1971 747 -5:00 - EST 2006 748 -5:00 US E%sT 749 # 750 # Eastern Crawford County, Indiana, left its clocks alone in 1974, 751 # as well as from 1976 through 2005. 752 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 753 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 754 Rule Marengo 1951 only - Sep lastSun 2:00 0 S 755 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 756 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 757 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 758 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 759 -6:00 US C%sT 1951 760 -6:00 Marengo C%sT 1961 Apr 30 2:00 761 -5:00 - EST 1969 762 -5:00 US E%sT 1974 Jan 6 2:00 763 -6:00 1:00 CDT 1974 Oct 27 2:00 764 -5:00 US E%sT 1976 765 -5:00 - EST 2006 766 -5:00 US E%sT 767 # 768 # Daviess, Dubois, Knox, and Martin Counties, Indiana, 769 # switched from eastern to central time in April 2006, then switched back 770 # in November 2007. 771 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 772 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 773 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 774 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 775 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 776 Rule Vincennes 1955 only - May 1 0:00 1:00 D 777 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 778 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 779 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 780 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 781 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 782 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 783 -6:00 US C%sT 1946 784 -6:00 Vincennes C%sT 1964 Apr 26 2:00 785 -5:00 - EST 1969 786 -5:00 US E%sT 1971 787 -5:00 - EST 2006 Apr 2 2:00 788 -6:00 US C%sT 2007 Nov 4 2:00 789 -5:00 US E%sT 790 # 791 # Perry County, Indiana, switched from eastern to central time in April 2006. 792 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 793 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 794 Rule Perry 1946 only - Sep lastSun 2:00 0 S 795 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 796 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 797 Rule Perry 1955 only - May 1 0:00 1:00 D 798 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 799 Rule Perry 1960 only - Oct lastSun 2:00 0 S 800 Rule Perry 1961 only - Sep lastSun 2:00 0 S 801 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 802 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 803 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 804 -6:00 US C%sT 1946 805 -6:00 Perry C%sT 1964 Apr 26 2:00 806 -5:00 - EST 1969 807 -5:00 US E%sT 1971 808 -5:00 - EST 2006 Apr 2 2:00 809 -6:00 US C%sT 810 # 811 # Pike County, Indiana moved from central to eastern time in 1977, 812 # then switched back in 2006, then switched back again in 2007. 813 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 814 Rule Pike 1955 only - May 1 0:00 1:00 D 815 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 816 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 817 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 818 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 819 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 820 -6:00 US C%sT 1955 821 -6:00 Pike C%sT 1965 Apr 25 2:00 822 -5:00 - EST 1966 Oct 30 2:00 823 -6:00 US C%sT 1977 Oct 30 2:00 824 -5:00 - EST 2006 Apr 2 2:00 825 -6:00 US C%sT 2007 Nov 4 2:00 826 -5:00 US E%sT 827 # 828 # Starke County, Indiana moved from central to eastern time in 1991, 829 # then switched back in 2006. 830 # From Arthur David Olson (1991-10-28): 831 # An article on page A3 of the Sunday, 1991-10-27 Washington Post 832 # notes that Starke County switched from Central time to Eastern time as of 833 # 1991-10-27. 834 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 835 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 836 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 837 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 838 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 839 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 840 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 841 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 842 -6:00 US C%sT 1947 843 -6:00 Starke C%sT 1962 Apr 29 2:00 844 -5:00 - EST 1963 Oct 27 2:00 845 -6:00 US C%sT 1991 Oct 27 2:00 846 -5:00 - EST 2006 Apr 2 2:00 847 -6:00 US C%sT 848 # 849 # Pulaski County, Indiana, switched from eastern to central time in 850 # April 2006 and then switched back in March 2007. 851 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 852 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 853 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 854 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 855 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 856 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 857 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 858 -6:00 US C%sT 1946 859 -6:00 Pulaski C%sT 1961 Apr 30 2:00 860 -5:00 - EST 1969 861 -5:00 US E%sT 1971 862 -5:00 - EST 2006 Apr 2 2:00 863 -6:00 US C%sT 2007 Mar 11 2:00 864 -5:00 US E%sT 865 # 866 # Switzerland County, Indiana, did not observe DST from 1973 through 2005. 867 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 868 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 869 -6:00 US C%sT 1954 Apr 25 2:00 870 -5:00 - EST 1969 871 -5:00 US E%sT 1973 872 -5:00 - EST 2006 873 -5:00 US E%sT 874 875 # Part of Kentucky left its clocks alone in 1974. 876 # This also includes Clark, Floyd, and Harrison counties in Indiana. 877 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 878 Rule Louisville 1921 only - May 1 2:00 1:00 D 879 Rule Louisville 1921 only - Sep 1 2:00 0 S 880 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 881 Rule Louisville 1941 only - Sep lastSun 2:00 0 S 882 Rule Louisville 1946 only - Jun 2 2:00 0 S 883 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 884 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 885 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 886 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 887 -6:00 US C%sT 1921 888 -6:00 Louisville C%sT 1942 889 -6:00 US C%sT 1946 890 -6:00 Louisville C%sT 1961 Jul 23 2:00 891 -5:00 - EST 1968 892 -5:00 US E%sT 1974 Jan 6 2:00 893 -6:00 1:00 CDT 1974 Oct 27 2:00 894 -5:00 US E%sT 895 # 896 # Wayne County, Kentucky 897 # 898 # From 899 # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 900 # Lake Cumberland LIFE 901 # </a> (1999-01-29) via WKYM-101.7: 902 # Clinton County has joined Wayne County in asking the DoT to change from 903 # the Central to the Eastern time zone.... The Wayne County government made 904 # the same request in December. And while Russell County officials have not 905 # taken action, the majority of respondents to a poll conducted there in 906 # August indicated they would like to change to "fast time" also. 907 # The three Lake Cumberland counties are the farthest east of any U.S. 908 # location in the Central time zone. 909 # 910 # From Rich Wales (2000-08-29): 911 # After prolonged debate, and despite continuing deep differences of opinion, 912 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 913 # (-0500) time. They won't "fall back" this year. See Sara Shipley, 914 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 915 # 916 # From Paul Eggert (2001-07-16): 917 # The final rule was published in the 918 # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 919 # Federal Register 65, 160 (2000-08-17), page 50154-50158. 920 # </a> 921 # 922 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 923 -6:00 US C%sT 1946 924 -6:00 - CST 1968 925 -6:00 US C%sT 2000 Oct 29 2:00 926 -5:00 US E%sT 927 928 929 # From Rives McDow (2000-08-30): 930 # Here ... are all the changes in the US since 1985. 931 # Kearny County, KS (put all of county on central; 932 # previously split between MST and CST) ... 1990-10 933 # Starke County, IN (from CST to EST) ... 1991-10 934 # Oliver County, ND (from MST to CST) ... 1992-10 935 # West Wendover, NV (from PST TO MST) ... 1999-10 936 # Wayne County, KY (from CST to EST) ... 2000-10 937 # 938 # From Paul Eggert (2001-07-17): 939 # We don't know where the line used to be within Kearny County, KS, 940 # so omit that change for now. 941 # See America/Indiana/Knox for the Starke County, IN change. 942 # See America/North_Dakota/Center for the Oliver County, ND change. 943 # West Wendover, NV officially switched from Pacific to mountain time on 944 # 1999-10-31. See the 945 # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 946 # Federal Register 64, 203 (1999-10-21), page 56705-56707. 947 # </a> 948 # However, the Federal Register says that West Wendover already operated 949 # on mountain time, and the rule merely made this official; 950 # hence a separate tz entry is not needed. 951 952 # Michigan 953 # 954 # From Bob Devine (1988-01-28): 955 # Michigan didn't observe DST from 1968 to 1973. 956 # 957 # From Paul Eggert (1999-03-31): 958 # Shanks writes that Michigan started using standard time on 1885-09-18, 959 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 960 # that Detroit kept 961 # 962 # local time until 1900 when the City Council decreed that clocks should 963 # be put back twenty-eight minutes to Central Standard Time. Half the 964 # city obeyed, half refused. After considerable debate, the decision 965 # was rescinded and the city reverted to Sun time. A derisive offer to 966 # erect a sundial in front of the city hall was referred to the 967 # Committee on Sewers. Then, in 1905, Central time was adopted 968 # by city vote. 969 # 970 # This story is too entertaining to be false, so go with Howse over Shanks. 971 # 972 # From Paul Eggert (2001-03-06): 973 # Garland (1927) writes ``Cleveland and Detroit advanced their clocks 974 # one hour in 1914.'' This change is not in Shanks. We have no more 975 # info, so omit this for now. 976 # 977 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 978 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 979 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 980 Rule Detroit 1948 only - Sep lastSun 2:00 0 S 981 Rule Detroit 1967 only - Jun 14 2:00 1:00 D 982 Rule Detroit 1967 only - Oct lastSun 2:00 0 S 983 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 984 Zone America/Detroit -5:32:11 - LMT 1905 985 -6:00 - CST 1915 May 15 2:00 986 -5:00 - EST 1942 987 -5:00 US E%sT 1946 988 -5:00 Detroit E%sT 1973 989 -5:00 US E%sT 1975 990 -5:00 - EST 1975 Apr 27 2:00 991 -5:00 US E%sT 992 # 993 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 994 # switched from EST to CST/CDT in 1973. 995 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 996 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 997 Rule Menominee 1946 only - Sep lastSun 2:00 0 S 998 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 999 Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1000 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1001 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1002 -6:00 US C%sT 1946 1003 -6:00 Menominee C%sT 1969 Apr 27 2:00 1004 -5:00 - EST 1973 Apr 29 2:00 1005 -6:00 US C%sT 1006 1007 # Navassa 1008 # administered by the US Fish and Wildlife Service 1009 # claimed by US under the provisions of the 1856 Guano Islands Act 1010 # also claimed by Haiti 1011 # occupied 1857/1900 by the Navassa Phosphate Co 1012 # US lighthouse 1917/1996-09 1013 # currently uninhabited 1014 # see Mark Fineman, ``An Isle Rich in Guano and Discord'', 1015 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1016 # Jimmy Skaggs, _The Great Guano Rush_ (1994). 1017 1018 ################################################################################ 1019 1020 1021 # From Paul Eggert (2006-03-22): 1022 # A good source for time zone historical data outside the U.S. is 1023 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1024 # San Diego: ACS Publications, Inc. (2003). 1025 # 1026 # Gwillim Law writes that a good source 1027 # for recent time zone data is the International Air Transport 1028 # Association's Standard Schedules Information Manual (IATA SSIM), 1029 # published semiannually. Law sent in several helpful summaries 1030 # of the IATA's data after 1990. 1031 # 1032 # Except where otherwise noted, Shanks & Pottenger is the source for 1033 # entries through 1990, and IATA SSIM is the source for entries afterwards. 1034 # 1035 # Other sources occasionally used include: 1036 # 1037 # Edward W. Whitman, World Time Differences, 1038 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1039 # which I found in the UCLA library. 1040 # 1041 # <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 1042 # William Willett, The Waste of Daylight, 19th edition 1043 # </a> (1914-03) 1044 # 1045 # See the `europe' file for Greenland. 1046 1047 # Canada 1048 1049 # From Alain LaBont<e'> (1994-11-14): 1050 # I post here the time zone abbreviations standardized in Canada 1051 # for both English and French in the CAN/CSA-Z234.4-89 standard.... 1052 # 1053 # UTC Standard time Daylight savings time 1054 # offset French English French English 1055 # -2:30 - - HAT NDT 1056 # -3 - - HAA ADT 1057 # -3:30 HNT NST - - 1058 # -4 HNA AST HAE EDT 1059 # -5 HNE EST HAC CDT 1060 # -6 HNC CST HAR MDT 1061 # -7 HNR MST HAP PDT 1062 # -8 HNP PST HAY YDT 1063 # -9 HNY YST - - 1064 # 1065 # HN: Heure Normale ST: Standard Time 1066 # HA: Heure Avanc<e'>e DT: Daylight saving Time 1067 # 1068 # A: de l'Atlantique Atlantic 1069 # C: du Centre Central 1070 # E: de l'Est Eastern 1071 # M: Mountain 1072 # N: Newfoundland 1073 # P: du Pacifique Pacific 1074 # R: des Rocheuses 1075 # T: de Terre-Neuve 1076 # Y: du Yukon Yukon 1077 # 1078 # From Paul Eggert (1994-11-22): 1079 # Alas, this sort of thing must be handled by localization software. 1080 1081 # Unless otherwise specified, the data for Canada are all from Shanks 1082 # & Pottenger. 1083 1084 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1085 # 2007-03-01): 1086 # The British Columbia government announced yesterday that it will 1087 # adjust daylight savings next year to align with changes in the 1088 # U.S. and the rest of Canada.... 1089 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1090 # ... 1091 # Nova Scotia 1092 # Daylight saving time will be extended by four weeks starting in 2007.... 1093 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1094 # 1095 # [For New Brunswick] the new legislation dictates that the time change is to 1096 # be done at 02:00 instead of 00:01. 1097 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1098 # ... 1099 # Manitoba has traditionally changed the clock every fall at 03:00. 1100 # As of 2006, the transition is to take place one hour earlier at 02:00. 1101 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1102 # ... 1103 # [Alberta, Ontario, Quebec] will follow US rules. 1104 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1105 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1106 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1107 # ... 1108 # P.E.I. will follow US rules.... 1109 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1110 # ... 1111 # Province of Newfoundland and Labrador.... 1112 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1113 # ... 1114 # Yukon 1115 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1116 # ... 1117 # N.W.T. will follow US rules. Whoever maintains the government web site 1118 # does not seem to believe in bookmarks. To see the news release, click the 1119 # following link and search for "Daylight Savings Time Change". Press the 1120 # "Daylight Savings Time Change" link; it will fire off a popup using 1121 # JavaScript. 1122 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1123 # ... 1124 # Nunavut 1125 # An amendment to the Interpretation Act was registered on February 19/2007.... 1126 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1127 1128 # From Paul Eggert (2006-04-25): 1129 # H. David Matthews and Mary Vincent's map 1130 # <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 1131 # "It's about TIME", _Canadian Geographic_ (September-October 1998) 1132 # </a> contains detailed boundaries for regions observing nonstandard 1133 # time and daylight saving time arrangements in Canada circa 1998. 1134 # 1135 # INMS, the Institute for National Measurement Standards in Ottawa, has <a 1136 # href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 1137 # information about standard and daylight saving time zones in Canada. 1138 # </a> (updated periodically). 1139 # Its unofficial information is often taken from Matthews and Vincent. 1140 1141 # From Paul Eggert (2006-06-27): 1142 # For now, assume all of DST-observing Canada will fall into line with the 1143 # new US DST rules, 1144 1145 # From Chris Walton (2011-12-01) 1146 # In the first of Tammy Hardwick's articles 1147 # <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1148 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1149 # </a> 1150 # she quotes the Friday November 1/1918 edition of the Creston Review. 1151 # The quote includes these two statements: 1152 # 'Sunday the CPR went back to the old system of time...' 1153 # '... The daylight saving scheme was dropped all over Canada at the same time,' 1154 # These statements refer to a transition from daylight time to standard time 1155 # that occurred nationally on Sunday October 27/1918. This transition was 1156 # also documented in the Saturday October 26/1918 edition of the Toronto Star. 1157 1158 # In light of that evidence, we alter the date from the earlier believed 1159 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1160 # than Thursday) in all Canadian rulesets. 1161 1162 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1163 Rule Canada 1918 only - Apr 14 2:00 1:00 D 1164 Rule Canada 1918 only - Oct 27 2:00 0 S 1165 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1166 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1167 Rule Canada 1945 only - Sep 30 2:00 0 S 1168 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1169 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1170 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1171 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1172 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1173 1174 1175 # Newfoundland and Labrador 1176 1177 # From Paul Eggert (2000-10-02): 1178 # Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1179 # but the only part of Labrador that follows the rules is the 1180 # southeast corner, including Port Hope Simpson and Mary's Harbour, 1181 # but excluding, say, Black Tickle. 1182 1183 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1184 Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1185 Rule StJohns 1917 only - Sep 17 2:00 0 S 1186 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1187 Rule StJohns 1919 only - May 5 23:00 1:00 D 1188 Rule StJohns 1919 only - Aug 12 23:00 0 S 1189 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1190 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1191 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1192 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1193 # Pottenger. 1194 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1195 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1196 # Whitman gives the following transitions: 1197 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1198 # but go with Shanks & Pottenger and assume they used Canadian rules. 1199 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1200 # Apr 30 - Sep 24; go with Shanks & Pottenger. 1201 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1202 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1203 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1204 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1205 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1206 # From Paul Eggert (2000-10-02): 1207 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1208 # at 00:01 local time. For now, assume it started in 1987. 1209 1210 # From Michael Pelley (2011-09-12): 1211 # We received today, Monday, September 12, 2011, notification that the 1212 # changes to the Newfoundland Standard Time Act have been proclaimed. 1213 # The change in the Act stipulates that the change from Daylight Savings 1214 # Time to Standard Time and from Standard Time to Daylight Savings Time 1215 # now occurs at 2:00AM. 1216 # ... 1217 # <a href="http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm"> 1218 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1219 # </a> 1220 # ... 1221 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1222 # Office of the Chief Information Officer 1223 # Executive Council 1224 # Government of Newfoundland & Labrador 1225 1226 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1227 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1228 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1229 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1230 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1231 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1232 # 1233 # St John's has an apostrophe, but Posix file names can't have apostrophes. 1234 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1235 Zone America/St_Johns -3:30:52 - LMT 1884 1236 -3:30:52 StJohns N%sT 1918 1237 -3:30:52 Canada N%sT 1919 1238 -3:30:52 StJohns N%sT 1935 Mar 30 1239 -3:30 StJohns N%sT 1942 May 11 1240 -3:30 Canada N%sT 1946 1241 -3:30 StJohns N%sT 2011 Nov 1242 -3:30 Canada N%sT 1243 1244 # most of east Labrador 1245 1246 # The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 1247 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1248 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1249 -3:30:52 - NST 1918 1250 -3:30:52 Canada N%sT 1919 1251 -3:30:52 - NST 1935 Mar 30 1252 -3:30 - NST 1936 1253 -3:30 StJohns N%sT 1942 May 11 1254 -3:30 Canada N%sT 1946 1255 -3:30 StJohns N%sT 1966 Mar 15 2:00 1256 -4:00 StJohns A%sT 2011 Nov 1257 -4:00 Canada A%sT 1258 1259 1260 # west Labrador, Nova Scotia, Prince Edward I 1261 1262 # From Paul Eggert (2006-03-22): 1263 # Shanks & Pottenger write that since 1970 most of this region has been like 1264 # Halifax. Many locales did not observe peacetime DST until 1972; 1265 # Glace Bay, NS is the largest that we know of. 1266 # Shanks & Pottenger also write that Liverpool, NS was the only town 1267 # in Canada to observe DST in 1971 but not 1970; for now we'll assume 1268 # this is a typo. 1269 1270 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1271 Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1272 Rule Halifax 1916 only - Oct 1 0:00 0 S 1273 Rule Halifax 1920 only - May 9 0:00 1:00 D 1274 Rule Halifax 1920 only - Aug 29 0:00 0 S 1275 Rule Halifax 1921 only - May 6 0:00 1:00 D 1276 Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1277 Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1278 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1279 Rule Halifax 1923 only - Sep 4 0:00 0 S 1280 Rule Halifax 1924 only - Sep 15 0:00 0 S 1281 Rule Halifax 1925 only - Sep 28 0:00 0 S 1282 Rule Halifax 1926 only - May 16 0:00 1:00 D 1283 Rule Halifax 1926 only - Sep 13 0:00 0 S 1284 Rule Halifax 1927 only - May 1 0:00 1:00 D 1285 Rule Halifax 1927 only - Sep 26 0:00 0 S 1286 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1287 Rule Halifax 1928 only - Sep 9 0:00 0 S 1288 Rule Halifax 1929 only - Sep 3 0:00 0 S 1289 Rule Halifax 1930 only - Sep 15 0:00 0 S 1290 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1291 Rule Halifax 1932 only - May 1 0:00 1:00 D 1292 Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1293 Rule Halifax 1933 only - Oct 2 0:00 0 S 1294 Rule Halifax 1934 only - May 20 0:00 1:00 D 1295 Rule Halifax 1934 only - Sep 16 0:00 0 S 1296 Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1297 Rule Halifax 1935 only - Sep 30 0:00 0 S 1298 Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1299 Rule Halifax 1936 only - Sep 14 0:00 0 S 1300 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1301 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1302 Rule Halifax 1939 only - May 28 0:00 1:00 D 1303 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1304 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1305 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1306 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1307 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1308 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1309 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1310 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1311 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1312 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1313 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1314 -4:00 Halifax A%sT 1918 1315 -4:00 Canada A%sT 1919 1316 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1317 -4:00 Canada A%sT 1946 1318 -4:00 Halifax A%sT 1974 1319 -4:00 Canada A%sT 1320 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1321 -4:00 Canada A%sT 1953 1322 -4:00 Halifax A%sT 1954 1323 -4:00 - AST 1972 1324 -4:00 Halifax A%sT 1974 1325 -4:00 Canada A%sT 1326 1327 # New Brunswick 1328 1329 # From Paul Eggert (2007-01-31): 1330 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1331 # says they changed at 00:01 through 2006, and 1332 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1333 # clear that this was the case since at least 1993. 1334 # For now, assume it started in 1993. 1335 1336 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1337 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1338 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1339 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1340 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1341 Rule Moncton 1939 only - May 27 1:00 1:00 D 1342 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1343 Rule Moncton 1940 only - May 19 1:00 1:00 D 1344 Rule Moncton 1941 only - May 4 1:00 1:00 D 1345 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1346 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1347 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1348 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1349 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1350 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1351 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1352 -5:00 - EST 1902 Jun 15 1353 -4:00 Canada A%sT 1933 1354 -4:00 Moncton A%sT 1942 1355 -4:00 Canada A%sT 1946 1356 -4:00 Moncton A%sT 1973 1357 -4:00 Canada A%sT 1993 1358 -4:00 Moncton A%sT 2007 1359 -4:00 Canada A%sT 1360 1361 # Quebec 1362 1363 # From Paul Eggert (2006-07-09): 1364 # Shanks & Pottenger write that since 1970 most of Quebec has been 1365 # like Montreal. 1366 1367 # From Paul Eggert (2006-06-27): 1368 # Matthews and Vincent (1998) also write that Quebec east of the -63 1369 # meridian is supposed to observe AST, but residents as far east as 1370 # Natashquan use EST/EDT, and residents east of Natashquan use AST. 1371 # In "Official time in Quebec" the Quebec department of justice writes in 1372 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1373 # that "The residents of the Municipality of the 1374 # Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1375 # Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1376 # written and use Atlantic standard time all year round. The same applies to 1377 # the residents of the Native facilities along the lower North Shore." 1378 # <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1379 # says this common practice was codified into law as of 2007. 1380 # For lack of better info, guess this practice began around 1970, contra to 1381 # Shanks & Pottenger who have this region observing AST/ADT. 1382 1383 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1384 Rule Mont 1917 only - Mar 25 2:00 1:00 D 1385 Rule Mont 1917 only - Apr 24 0:00 0 S 1386 Rule Mont 1919 only - Mar 31 2:30 1:00 D 1387 Rule Mont 1919 only - Oct 25 2:30 0 S 1388 Rule Mont 1920 only - May 2 2:30 1:00 D 1389 Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1390 Rule Mont 1921 only - May 1 2:00 1:00 D 1391 Rule Mont 1922 only - Apr 30 2:00 1:00 D 1392 Rule Mont 1924 only - May 17 2:00 1:00 D 1393 Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1394 Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1395 # The 1927-to-1937 rules can be expressed more simply as 1396 # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1397 # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1398 # The rules below avoid use of 24:00 1399 # (which pre-1998 versions of zic cannot handle). 1400 Rule Mont 1927 only - May 1 0:00 1:00 D 1401 Rule Mont 1927 1932 - Sep lastSun 0:00 0 S 1402 Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1403 Rule Mont 1932 only - May 1 0:00 1:00 D 1404 Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1405 Rule Mont 1933 only - Oct 1 0:00 0 S 1406 Rule Mont 1934 1939 - Sep lastSun 0:00 0 S 1407 Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1408 Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1409 Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1410 Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1411 Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1412 1413 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1414 Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1415 -4:00 Canada A%sT 1970 1416 -4:00 - AST 1417 Zone America/Montreal -4:54:16 - LMT 1884 1418 -5:00 Mont E%sT 1918 1419 -5:00 Canada E%sT 1919 1420 -5:00 Mont E%sT 1942 Feb 9 2:00s 1421 -5:00 Canada E%sT 1946 1422 -5:00 Mont E%sT 1974 1423 -5:00 Canada E%sT 1424 1425 1426 # Ontario 1427 1428 # From Paul Eggert (2006-07-09): 1429 # Shanks & Pottenger write that since 1970 most of Ontario has been like 1430 # Toronto. 1431 # Thunder Bay skipped DST in 1973. 1432 # Many smaller locales did not observe peacetime DST until 1974; 1433 # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1434 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1435 1436 # From Mark Brader (2003-07-26): 1437 # [According to the Toronto Star] Orillia, Ontario, adopted DST 1438 # effective Saturday, 1912-06-22, 22:00; the article mentions that 1439 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1440 # have already done so. In Orillia DST was to run until Saturday, 1441 # 1912-08-31 (no time mentioned), but it was met with considerable 1442 # hostility from certain segments of the public, and was revoked after 1443 # only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1444 # presumably that should be -07-06. (1912-06-19, -07-12; also letters 1445 # earlier in June). 1446 # 1447 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1448 1449 # From Paul Eggert (1997-10-17): 1450 # Mark Brader writes that an article in the 1997-10-14 Toronto Star 1451 # says that Atikokan, Ontario currently does not observe DST, 1452 # but will vote on 11-10 whether to use EST/EDT. 1453 # He also writes that the 1454 # <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 1455 # Ontario Time Act (1990, Chapter T.9) 1456 # </a> 1457 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1458 # Officially Atikokan is therefore on CST/CDT, and most likely this report 1459 # concerns a non-official time observed as a matter of local practice. 1460 # 1461 # From Paul Eggert (2000-10-02): 1462 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1463 # New Osnaburgh observe CST all year, that Big Trout Lake observes 1464 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1465 # violation of the official Ontario rules. 1466 # 1467 # From Paul Eggert (2006-07-09): 1468 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1469 # 2005-07-21 Chronicle-Journal, which said: 1470 # 1471 # The clocks in Atikokan stay set on standard time year-round. 1472 # This means they spend about half the time on central time and 1473 # the other half on eastern time. 1474 # 1475 # For the most part, the system works, Mayor Dennis Brown said. 1476 # 1477 # "The majority of businesses in Atikokan deal more with Eastern 1478 # Canada, but there are some that deal with Western Canada," he 1479 # said. "I don't see any changes happening here." 1480 # 1481 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1482 # [New Osnaburgh] follow the same practice." 1483 1484 # From Garry McKinnon (2006-07-14) via Chris Walton: 1485 # I chatted with a member of my board who has an outstanding memory 1486 # and a long history in Atikokan (and in the telecom industry) and he 1487 # can say for certain that Atikokan has been practicing the current 1488 # time keeping since 1952, at least. 1489 1490 # From Paul Eggert (2006-07-17): 1491 # Shanks & Pottenger say that Atikokan has agreed with Rainy River 1492 # ever since standard time was introduced, but the information from 1493 # McKinnon sounds more authoritative. For now, assume that Atikokan 1494 # switched to EST immediately after WWII era daylight saving time 1495 # ended. This matches the old (less-populous) America/Coral_Harbour 1496 # entry since our cutoff date of 1970, so we can move 1497 # America/Coral_Harbour to the 'backward' file. 1498 1499 # From Mark Brader (2010-03-06): 1500 # 1501 # Currently the database has: 1502 # 1503 # # Ontario 1504 # 1505 # # From Paul Eggert (2006-07-09): 1506 # # Shanks & Pottenger write that since 1970 most of Ontario has been like 1507 # # Toronto. 1508 # # Thunder Bay skipped DST in 1973. 1509 # # Many smaller locales did not observe peacetime DST until 1974; 1510 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1511 # 1512 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1513 # right corner of page 1, it says that Toronto will return to standard 1514 # time at 2 am Sunday morning (which agrees with the database), and that: 1515 # 1516 # The one-hour setback will go into effect throughout most of Ontario, 1517 # except in areas like Windsor which remains on standard time all year. 1518 # 1519 # Windsor is, of course, a lot larger than Nipigon. 1520 # 1521 # I only came across this incidentally. I don't know if Windsor began 1522 # observing DST when Detroit did, or in 1974, or on some other date. 1523 # 1524 # By the way, the article continues by noting that: 1525 # 1526 # Some cities in the United States have pushed the deadline back 1527 # three weeks and will change over from daylight saving in October. 1528 1529 # From Arthur David Olson (2010-07-17): 1530 # 1531 # "Standard Time and Time Zones in Canada" appeared in 1532 # The Journal of The Royal Astronomical Society of Canada, 1533 # volume 26, number 2 (February 1932) and, as of 2010-07-17, 1534 # was available at 1535 # <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1536 # http://adsabs.harvard.edu/full/1932JRASC..26...49S 1537 # </a> 1538 # 1539 # It includes the text below (starting on page 57): 1540 # 1541 # A list of the places in Canada using daylight saving time would 1542 # require yearly revision. From information kindly furnished by 1543 # the provincial governments and by the postmasters in many cities 1544 # and towns, it is found that the following places used daylight sav- 1545 # ing in 1930. The information for the province of Quebec is definite, 1546 # for the other provinces only approximate: 1547 # 1548 # Province Daylight saving time used 1549 # Prince Edward Island Not used. 1550 # Nova Scotia In Halifax only. 1551 # New Brunswick In St. John only. 1552 # Quebec In the following places: 1553 # Montreal Lachine 1554 # Quebec Mont-Royal 1555 # Levis Iberville 1556 # St. Lambert Cap de la Madeleine 1557 # Verdun Loretteville 1558 # Westmount Richmond 1559 # Outremont St. Jerome 1560 # Longueuil Greenfield Park 1561 # Arvida Waterloo 1562 # Chambly-Canton Beaulieu 1563 # Melbourne La Tuque 1564 # St. Theophile Buckingham 1565 # Ontario Used generally in the cities and towns along 1566 # the southerly part of the province. Not 1567 # used in the northwesterlhy part. 1568 # Manitoba Not used. 1569 # Saskatchewan In Regina only. 1570 # Alberta Not used. 1571 # British Columbia Not used. 1572 # 1573 # With some exceptions, the use of daylight saving may be said to be limited 1574 # to those cities and towns lying between Quebec city and Windsor, Ont. 1575 1576 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1577 Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1578 Rule Toronto 1919 only - Oct 26 0:00 0 S 1579 Rule Toronto 1920 only - May 2 2:00 1:00 D 1580 Rule Toronto 1920 only - Sep 26 0:00 0 S 1581 Rule Toronto 1921 only - May 15 2:00 1:00 D 1582 Rule Toronto 1921 only - Sep 15 2:00 0 S 1583 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1584 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1585 # was meant. 1586 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1587 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1588 # The 1927-to-1939 rules can be expressed more simply as 1589 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1590 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1591 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1592 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1593 # The rules below avoid use of Sun>=25 1594 # (which pre-2004 versions of zic cannot handle). 1595 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1596 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1597 Rule Toronto 1932 only - May 1 2:00 1:00 D 1598 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1599 Rule Toronto 1933 only - Oct 1 2:00 0 S 1600 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1601 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1602 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1603 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1604 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1605 Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1606 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1607 Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1608 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1609 # Shanks & Pottenger say Toronto ended DST a week early in 1971, 1610 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1611 # is wrong, and that he had confirmed it by checking the 1971-10-30 1612 # Toronto Star, which said that DST was ending 1971-10-31 as usual. 1613 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1614 1615 # From Paul Eggert (2003-07-27): 1616 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1617 # Port Arthur, Ontario, the principle of the Bill has been in 1618 # operation for the past three years, and in the City of Moose Jaw, 1619 # Saskatchewan, for one year." 1620 1621 # From David Bryan via Tory Tronrud, Director/Curator, 1622 # Thunder Bay Museum (2003-11-12): 1623 # There is some suggestion, however, that, by-law or not, daylight 1624 # savings time was being practiced in Fort William and Port Arthur 1625 # before 1909.... [I]n 1910, the line between the Eastern and Central 1626 # Time Zones was permanently moved about two hundred miles west to 1627 # include the Thunder Bay area.... When Canada adopted daylight 1628 # savings time in 1916, Fort William and Port Arthur, having done so 1629 # already, did not change their clocks.... During the Second World 1630 # War,... [t]he cities agreed to implement DST during the summer 1631 # months for the remainder of the war years. 1632 1633 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1634 Zone America/Toronto -5:17:32 - LMT 1895 1635 -5:00 Canada E%sT 1919 1636 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1637 -5:00 Canada E%sT 1946 1638 -5:00 Toronto E%sT 1974 1639 -5:00 Canada E%sT 1640 Zone America/Thunder_Bay -5:57:00 - LMT 1895 1641 -6:00 - CST 1910 1642 -5:00 - EST 1942 1643 -5:00 Canada E%sT 1970 1644 -5:00 Mont E%sT 1973 1645 -5:00 - EST 1974 1646 -5:00 Canada E%sT 1647 Zone America/Nipigon -5:53:04 - LMT 1895 1648 -5:00 Canada E%sT 1940 Sep 29 1649 -5:00 1:00 EDT 1942 Feb 9 2:00s 1650 -5:00 Canada E%sT 1651 Zone America/Rainy_River -6:18:16 - LMT 1895 1652 -6:00 Canada C%sT 1940 Sep 29 1653 -6:00 1:00 CDT 1942 Feb 9 2:00s 1654 -6:00 Canada C%sT 1655 Zone America/Atikokan -6:06:28 - LMT 1895 1656 -6:00 Canada C%sT 1940 Sep 29 1657 -6:00 1:00 CDT 1942 Feb 9 2:00s 1658 -6:00 Canada C%sT 1945 Sep 30 2:00 1659 -5:00 - EST 1660 1661 1662 # Manitoba 1663 1664 # From Rob Douglas (2006-04-06): 1665 # the old Manitoba Time Act - as amended by Bill 2, assented to 1666 # March 27, 1987 ... said ... 1667 # "between two o'clock Central Standard Time in the morning of 1668 # the first Sunday of April of each year and two o'clock Central 1669 # Standard Time in the morning of the last Sunday of October next 1670 # following, one hour in advance of Central Standard Time."... 1671 # I believe that the English legislation [of the old time act] had = 1672 # been assented to (March 22, 1967).... 1673 # Also, as far as I can tell, there was no order-in-council varying 1674 # the time of Daylight Saving Time for 2005 and so the provisions of 1675 # the 1987 version would apply - the changeover was at 2:00 Central 1676 # Standard Time (i.e. not until 3:00 Central Daylight Time). 1677 1678 # From Paul Eggert (2006-04-10): 1679 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1680 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1681 # it was also 02:00s in 1966. 1682 1683 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1684 Rule Winn 1916 only - Apr 23 0:00 1:00 D 1685 Rule Winn 1916 only - Sep 17 0:00 0 S 1686 Rule Winn 1918 only - Apr 14 2:00 1:00 D 1687 Rule Winn 1918 only - Oct 27 2:00 0 S 1688 Rule Winn 1937 only - May 16 2:00 1:00 D 1689 Rule Winn 1937 only - Sep 26 2:00 0 S 1690 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1691 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1692 Rule Winn 1945 only - Sep lastSun 2:00 0 S 1693 Rule Winn 1946 only - May 12 2:00 1:00 D 1694 Rule Winn 1946 only - Oct 13 2:00 0 S 1695 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1696 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1697 Rule Winn 1950 only - May 1 2:00 1:00 D 1698 Rule Winn 1950 only - Sep 30 2:00 0 S 1699 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1700 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1701 Rule Winn 1959 only - Oct lastSun 2:00 0 S 1702 Rule Winn 1960 only - Sep lastSun 2:00 0 S 1703 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1704 Rule Winn 1963 only - Sep 22 2:00 0 S 1705 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1706 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1707 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1708 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1709 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1710 -6:00 Winn C%sT 2006 1711 -6:00 Canada C%sT 1712 1713 1714 # Saskatchewan 1715 1716 # From Mark Brader (2003-07-26): 1717 # The first actual adoption of DST in Canada was at the municipal 1718 # level. As the [Toronto] Star put it (1912-06-07), "While people 1719 # elsewhere have long been talking of legislation to save daylight, 1720 # the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1721 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1722 # presumably late evening, as below), and would run until "the end of 1723 # the summer". The discrepancy between municipal time and railroad 1724 # time was noted. 1725 1726 # From Paul Eggert (2003-07-27): 1727 # Willett (1914-03) notes that DST "has been in operation ... in the 1728 # City of Moose Jaw, Saskatchewan, for one year." 1729 1730 # From Paul Eggert (2006-03-22): 1731 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1732 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1733 # Other western towns (e.g. Lloydminster) are like Edmonton. 1734 # Matthews and Vincent (1998) write that Denare Beach and Creighton 1735 # are like Winnipeg, in violation of Saskatchewan law. 1736 1737 # From W. Jones (1992-11-06): 1738 # The. . .below is based on information I got from our law library, the 1739 # provincial archives, and the provincial Community Services department. 1740 # A precise history would require digging through newspaper archives, and 1741 # since you didn't say what you wanted, I didn't bother. 1742 # 1743 # Saskatchewan is split by a time zone meridian (105W) and over the years 1744 # the boundary became pretty ragged as communities near it reevaluated 1745 # their affiliations in one direction or the other. In 1965 a provincial 1746 # referendum favoured legislating common time practices. 1747 # 1748 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1749 # Saskatchewan 1978) was proclaimed, and established that the eastern 1750 # part of Saskatchewan would use CST year round, that districts in 1751 # northwest Saskatchewan would by default follow CST but could opt to 1752 # follow Mountain Time rules (thus 1 hour difference in the winter and 1753 # zero in the summer), and that districts in southwest Saskatchewan would 1754 # by default follow MT but could opt to follow CST. 1755 # 1756 # It took a few years for the dust to settle (I know one story of a town 1757 # on one time zone having its school in another, such that a mom had to 1758 # serve her family lunch in two shifts), but presently it seems that only 1759 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1760 # rules any more; all other districts appear to have used CST year round 1761 # since sometime in the 1960s. 1762 1763 # From Chris Walton (2006-06-26): 1764 # The Saskatchewan time act which was last updated in 1996 is about 30 pages 1765 # long and rather painful to read. 1766 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1767 1768 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1769 Rule Regina 1918 only - Apr 14 2:00 1:00 D 1770 Rule Regina 1918 only - Oct 27 2:00 0 S 1771 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1772 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1773 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1774 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1775 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1776 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1777 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1778 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1779 Rule Regina 1945 only - Sep lastSun 2:00 0 S 1780 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1781 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1782 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1783 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1784 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1785 Rule Regina 1959 only - Oct lastSun 2:00 0 S 1786 # 1787 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1788 Rule Swift 1957 only - Oct lastSun 2:00 0 S 1789 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1790 Rule Swift 1959 only - Oct lastSun 2:00 0 S 1791 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1792 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1793 Zone America/Regina -6:58:36 - LMT 1905 Sep 1794 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1795 -6:00 - CST 1796 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1797 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1798 -7:00 Regina M%sT 1950 1799 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1800 -6:00 - CST 1801 1802 1803 # Alberta 1804 1805 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1806 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1807 Rule Edm 1918 only - Oct 27 2:00 0 S 1808 Rule Edm 1919 only - May 27 2:00 0 S 1809 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1810 Rule Edm 1920 only - Oct lastSun 2:00 0 S 1811 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1812 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1813 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1814 Rule Edm 1945 only - Sep lastSun 2:00 0 S 1815 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1816 Rule Edm 1947 only - Sep lastSun 2:00 0 S 1817 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1818 Rule Edm 1967 only - Oct lastSun 2:00 0 S 1819 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1820 Rule Edm 1969 only - Oct lastSun 2:00 0 S 1821 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1822 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1823 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1824 Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1825 -7:00 Edm M%sT 1987 1826 -7:00 Canada M%sT 1827 1828 1829 # British Columbia 1830 1831 # From Paul Eggert (2006-03-22): 1832 # Shanks & Pottenger write that since 1970 most of this region has 1833 # been like Vancouver. 1834 # Dawson Creek uses MST. Much of east BC is like Edmonton. 1835 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1836 1837 # It seems though that (re: Creston) is not entirely correct: 1838 1839 # From Chris Walton (2011-12-01): 1840 # There are two areas within the Canadian province of British Columbia 1841 # that do not currently observe daylight saving: 1842 # a) The Creston Valley (includes the town of Creston and surrounding area) 1843 # b) The eastern half of the Peace River Regional District 1844 # (includes the cities of Dawson Creek and Fort St. John) 1845 1846 # Earlier this year I stumbled across a detailed article about the time 1847 # keeping history of Creston; it was written by Tammy Hardwick who is the 1848 # manager of the Creston & District Museum. The article was written in May 2009. 1849 # <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1850 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1851 # </a> 1852 # According to the article, Creston has not changed its clocks since June 1918. 1853 # i.e. Creston has been stuck on UTC-7 for 93 years. 1854 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1855 1856 # Unfortunately the exact date for the time change in June 1918 remains 1857 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1858 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1859 # as plausible as any other date (in June). She also said that after writing the 1860 # article she had discovered another time change in 1916; this is the subject 1861 # of another article which she wrote in October 2010. 1862 # <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56"> 1863 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1864 # </a> 1865 1866 # Here is a summary of the three clock change events in Creston's history: 1867 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1868 # Exact date unknown 1869 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1870 # Exact date in October unknown; Sunday October 1 is a reasonable guess. 1871 # 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1872 # Exact date in June unknown; Sunday June 2 is a reasonable guess. 1873 # note#1: 1874 # On Oct 27/1918 when daylight saving ended in the rest of Canada, 1875 # Creston did not change its clocks. 1876 # note#2: 1877 # During WWII when the Federal Government legislated a mandatory clock change, 1878 # Creston did not oblige. 1879 # note#3: 1880 # There is no guarantee that Creston will remain on Mountain Standard Time 1881 # (UTC-7) forever. 1882 # The subject was debated at least once this year by the town Council. 1883 # <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html"> 1884 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1885 # </a> 1886 1887 # During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1888 # In Creston, that was handled by shifting the area to PST (-8:00) then applying 1889 # summer time to cause the offset to be -7:00, the same as it had been before 1890 # the change. It can be argued that the timezone abbreviation during this 1891 # period should be PDT rather than MST, but that doesn't seem important enough 1892 # (to anyone) to further complicate the rules. 1893 1894 # The transition dates (and times) are guesses. 1895 1896 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1897 Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1898 Rule Vanc 1918 only - Oct 27 2:00 0 S 1899 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1900 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1901 Rule Vanc 1945 only - Sep 30 2:00 0 S 1902 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1903 Rule Vanc 1946 only - Oct 13 2:00 0 S 1904 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1905 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1906 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1907 Zone America/Vancouver -8:12:28 - LMT 1884 1908 -8:00 Vanc P%sT 1987 1909 -8:00 Canada P%sT 1910 Zone America/Dawson_Creek -8:00:56 - LMT 1884 1911 -8:00 Canada P%sT 1947 1912 -8:00 Vanc P%sT 1972 Aug 30 2:00 1913 -7:00 - MST 1914 Zone America/Creston -7:46:04 - LMT 1884 1915 -7:00 - MST 1916 Oct 1 1916 -8:00 - PST 1918 Jun 2 1917 -7:00 - MST 1918 1919 # Northwest Territories, Nunavut, Yukon 1920 1921 # From Paul Eggert (2006-03-22): 1922 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1923 # Mathew Englander (1996-10-07) gives the following refs: 1924 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1925 # c. 7 defines Yukon standard time as UTC-9. This is still valid; 1926 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1927 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1928 # * O.I.C. 1980/02 established DST. 1929 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1930 # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1931 # with Englander. 1932 # From Chris Walton (2006-06-26): 1933 # Here is a link to the old daylight saving portion of the interpretation 1934 # act which was last updated in 1987: 1935 # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1936 1937 # From Rives McDow (1999-09-04): 1938 # Nunavut ... moved ... to incorporate the whole territory into one time zone. 1939 # <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 1940 # Nunavut moves to single time zone Oct. 31 1941 # </a> 1942 # 1943 # From Antoine Leca (1999-09-06): 1944 # We then need to create a new timezone for the Kitikmeot region of Nunavut 1945 # to differentiate it from the Yellowknife region. 1946 1947 # From Paul Eggert (1999-09-20): 1948 # <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 1949 # Basic Facts: The New Territory 1950 # </a> (1999) reports that Pangnirtung operates on eastern time, 1951 # and that Coral Harbour does not observe DST. We don't know when 1952 # Pangnirtung switched to eastern time; we'll guess 1995. 1953 1954 # From Rives McDow (1999-11-08): 1955 # On October 31, when the rest of Nunavut went to Central time, 1956 # Pangnirtung wobbled. Here is the result of their wobble: 1957 # 1958 # The following businesses and organizations in Pangnirtung use Central Time: 1959 # 1960 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1961 # Eastern Arctic National Parks, A & D Specialist 1962 # 1963 # The following businesses and organizations in Pangnirtung use Eastern Time: 1964 # 1965 # Hamlet office, All other businesses, Both schools, Airport operator 1966 # 1967 # This has made for an interesting situation there, which warranted the news. 1968 # No one there that I spoke with seems concerned, or has plans to 1969 # change the local methods of keeping time, as it evidently does not 1970 # really interfere with any activities or make things difficult locally. 1971 # They plan to celebrate New Year's turn-over twice, one hour apart, 1972 # so it appears that the situation will last at least that long. 1973 # The Nunavut Intergovernmental Affairs hopes that they will "come to 1974 # their senses", but the locals evidently don't see any problem with 1975 # the current state of affairs. 1976 1977 # From Michaela Rodrigue, writing in the 1978 # <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 1979 # Nunatsiaq News (1999-11-19)</a>: 1980 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1981 # central - or Nunavut time - for government offices, and eastern time 1982 # for municipal offices and schools.... Igloolik [was similar but then] 1983 # made the switch to central time on Saturday, Nov. 6. 1984 1985 # From Paul Eggert (2000-10-02): 1986 # Matthews and Vincent (1998) say the following, but we lack histories 1987 # for these potential new Zones. 1988 # 1989 # The Canadian Forces station at Alert uses Eastern Time while the 1990 # handful of residents at the Eureka weather station [in the Central 1991 # zone] skip daylight savings. Baffin Island, which is crossed by the 1992 # Central, Eastern and Atlantic Time zones only uses Eastern Time. 1993 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 1994 # Central Time and Southampton Island [in the Central zone] is not 1995 # required to use daylight savings. 1996 1997 # From 1998 # <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 1999 # Nunavut now has two time zones 2000 # </a> (2000-11-10): 2001 # The Nunavut government would allow its employees in Kugluktuk and 2002 # Cambridge Bay to operate on central time year-round, putting them 2003 # one hour behind the rest of Nunavut for six months during the winter. 2004 # At the end of October the two communities had rebelled against 2005 # Nunavut's unified time zone, refusing to shift to eastern time with 2006 # the rest of the territory for the winter. Cambridge Bay remained on 2007 # central time, while Kugluktuk, even farther west, reverted to 2008 # mountain time, which they had used before the advent of Nunavut's 2009 # unified time zone in 1999. 2010 # 2011 # From Rives McDow (2001-01-20), quoting the Nunavut government: 2012 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2013 2014 # From Paul Eggert (2000-12-04): 2015 # Let's just keep track of the official times for now. 2016 2017 # From Rives McDow (2001-03-07): 2018 # The premier of Nunavut has issued a ministerial statement advising 2019 # that effective 2001-04-01, the territory of Nunavut will revert 2020 # back to three time zones (mountain, central, and eastern). Of the 2021 # cities in Nunavut, Coral Harbor is the only one that I know of that 2022 # has said it will not observe dst, staying on EST year round. I'm 2023 # checking for more info, and will get back to you if I come up with 2024 # more. 2025 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2026 2027 # From Gwillim Law (2005-05-21): 2028 # According to maps at 2029 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 2030 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 2031 # (both dated 2003), and 2032 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2033 # (from a 1998 Canadian Geographic article), the de facto and de jure time 2034 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2035 # round. Using Google, it's easy to find other websites that confirm this. 2036 # I wasn't able to find how far back this time regimen goes, but since it 2037 # predates the creation of Nunavut, it probably goes back many years.... 2038 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2039 # 2040 # From Paul Eggert (2005-07-26): 2041 # For lack of better information, assume that Southampton Island observed 2042 # daylight saving only during wartime. 2043 2044 # From Chris Walton (2007-03-01): 2045 # ... the community of Resolute (located on Cornwallis Island in 2046 # Nunavut) moved from Central Time to Eastern Time last November. 2047 # Basically the community did not change its clocks at the end of 2048 # daylight saving.... 2049 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2050 2051 # From Chris Walton (2011-03-21): 2052 # Back in 2007 I initiated the creation of a new "zone file" for Resolute 2053 # Bay. Resolute Bay is a small community located about 900km north of 2054 # the Arctic Circle. The zone file was required because Resolute Bay had 2055 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2056 # 2057 # According to new information which I received last week, Resolute Bay 2058 # went back to using UTC-6 in the winter of 2007-2008... 2059 # 2060 # On March 11/2007 most of Canada went onto daylight saving. On March 2061 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2062 # talked to somebody that was both knowledgeable and helpful. I was able 2063 # to confirm that Resolute Bay was still operating on UTC-5. It was 2064 # explained to me that Resolute Bay had been on the Eastern Time zone 2065 # (EST) in the winter, and was now back on the Central Time zone (CDT). 2066 # i.e. the time zone had changed twice in the last year but the clocks 2067 # had not moved. The residents had to know which time zone they were in 2068 # so they could follow the correct TV schedule... 2069 # 2070 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2071 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2072 # of the phone call, I decided to seek out an alternate source of 2073 # information. I found an e-mail address for somebody by the name of 2074 # Stephanie Adams whose job was listed as "Inns North Support Officer for 2075 # Arctic Co-operatives." I was under the impression that Stephanie lived 2076 # and worked in Resolute Bay... 2077 # 2078 # On March 14/2011 I phoned the hamlet office again. I was told that 2079 # Resolute Bay had been using Central Standard Time over the winter of 2080 # 2010-2011 and that the clocks had therefore been moved one hour ahead 2081 # on March 13/2011. The person I talked to was aware that Resolute Bay 2082 # had previously experimented with Eastern Standard Time but he could not 2083 # tell me when the practice had stopped. 2084 # 2085 # On March 17/2011 I searched the Web to find an e-mail address of 2086 # somebody that might be able to tell me exactly when Resolute Bay went 2087 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2088 # used to be the mayor of Resolute Bay and he apparently owns half the 2089 # businesses including "South Camp Inn." This website has some info on 2090 # Aziz: 2091 # <a href="http://www.uphere.ca/node/493"> 2092 # http://www.uphere.ca/node/493 2093 # </a> 2094 # 2095 # I sent Aziz an e-mail asking when Resolute Bay had stopped using 2096 # Eastern Standard Time. 2097 # 2098 # Aziz responded quickly with this: "hi, The time was not changed for the 2099 # 1 year only, the following year, the community went back to the old way 2100 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2101 # the winter Zulu plus 6 hrs" 2102 # 2103 # This of course conflicted with everything I had ascertained in November 2008. 2104 # 2105 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2106 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2107 # may want to check with the weather office in Resolute Bay or do a 2108 # search on the weather through Env. Canada. web site" 2109 # 2110 # If I had realized the Stephanie did not live in Resolute Bay I would 2111 # never have contacted her. I now believe that all the information I 2112 # obtained in November 2008 should be ignored... 2113 # I apologize for reporting incorrect information in 2008. 2114 2115 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2116 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2117 Rule NT_YK 1918 only - Oct 27 2:00 0 S 2118 Rule NT_YK 1919 only - May 25 2:00 1:00 D 2119 Rule NT_YK 1919 only - Nov 1 0:00 0 S 2120 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2121 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2122 Rule NT_YK 1945 only - Sep 30 2:00 0 S 2123 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2124 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2125 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2126 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2127 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2128 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2129 # aka Panniqtuuq 2130 Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 2131 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2132 -5:00 Canada E%sT 1999 Oct 31 2:00 2133 -6:00 Canada C%sT 2000 Oct 29 2:00 2134 -5:00 Canada E%sT 2135 # formerly Frobisher Bay 2136 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2137 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2138 -6:00 Canada C%sT 2000 Oct 29 2:00 2139 -5:00 Canada E%sT 2140 # aka Qausuittuq 2141 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2142 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2143 -5:00 - EST 2001 Apr 1 3:00 2144 -6:00 Canada C%sT 2006 Oct 29 2:00 2145 -5:00 - EST 2007 Mar 11 3:00 2146 -6:00 Canada C%sT 2147 # aka Kangiqiniq 2148 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2149 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2150 -5:00 - EST 2001 Apr 1 3:00 2151 -6:00 Canada C%sT 2152 # aka Iqaluktuuttiaq 2153 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2154 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2155 -6:00 Canada C%sT 2000 Oct 29 2:00 2156 -5:00 - EST 2000 Nov 5 0:00 2157 -6:00 - CST 2001 Apr 1 3:00 2158 -7:00 Canada M%sT 2159 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2160 -7:00 NT_YK M%sT 1980 2161 -7:00 Canada M%sT 2162 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 2163 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2164 -7:00 NT_YK M%sT 1980 2165 -7:00 Canada M%sT 2166 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2167 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2168 -8:00 NT_YK P%sT 1980 2169 -8:00 Canada P%sT 2170 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2171 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2172 -8:00 NT_YK P%sT 1980 2173 -8:00 Canada P%sT 2174 2175 2176 ############################################################################### 2177 2178 # Mexico 2179 2180 # From Paul Eggert (2001-03-05): 2181 # The Investigation and Analysis Service of the 2182 # Mexican Library of Congress (MLoC) has published a 2183 # <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 2184 # history of Mexican local time (in Spanish) 2185 # </a>. 2186 # 2187 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2188 # (In all cases we go with the MLoC.) 2189 # S&P report that Baja was at -8:00 in 1922/1923. 2190 # S&P say the 1930 transition in Baja was 1930-11-16. 2191 # S&P report no DST during summer 1931. 2192 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2193 2194 # From Gwillim Law (2001-02-20): 2195 # There are some other discrepancies between the Decrees page and the 2196 # tz database. I think they can best be explained by supposing that 2197 # the researchers who prepared the Decrees page failed to find some of 2198 # the relevant documents. 2199 2200 # From Alan Perry (1996-02-15): 2201 # A guy from our Mexico subsidiary finally found the Presidential Decree 2202 # outlining the timezone changes in Mexico. 2203 # 2204 # ------------- Begin Forwarded Message ------------- 2205 # 2206 # I finally got my hands on the Official Presidential Decree that sets up the 2207 # rules for the DST changes. The rules are: 2208 # 2209 # 1. The country is divided in 3 timezones: 2210 # - Baja California Norte (the Mexico/BajaNorte TZ) 2211 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2212 # - The rest of the country (the Mexico/General TZ) 2213 # 2214 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2215 # at 2:00 AM, the times in each zone are as follows: 2216 # BajaNorte: GMT+7 2217 # BajaSur: GMT+6 2218 # General: GMT+5 2219 # 2220 # 3. The rest of the year, the times are as follows: 2221 # BajaNorte: GMT+8 2222 # BajaSur: GMT+7 2223 # General: GMT+6 2224 # 2225 # The Decree was published in Mexico's Official Newspaper on January 4th. 2226 # 2227 # -------------- End Forwarded Message -------------- 2228 # From Paul Eggert (1996-06-12): 2229 # For an English translation of the decree, see 2230 # <a href="http://mexico-travel.com/extra/timezone_eng.html"> 2231 # ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 2232 # </a> 2233 2234 # From Rives McDow (1998-10-08): 2235 # The State of Quintana Roo has reverted back to central STD and DST times 2236 # (i.e. UTC -0600 and -0500 as of 1998-08-02). 2237 2238 # From Rives McDow (2000-01-10): 2239 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2240 # zone 5 hours from the International Date Line, and will not observe daylight 2241 # savings time so as to stay on the same time zone as the southern part of 2242 # Arizona year round. 2243 2244 # From Jesper Norgaard, translating 2245 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2246 # In Oaxaca, the 55.000 teachers from the Section 22 of the National 2247 # Syndicate of Education Workers, refuse to apply daylight saving each 2248 # year, so that the more than 10,000 schools work at normal hour the 2249 # whole year. 2250 2251 # From Gwillim Law (2001-01-19): 2252 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2253 # (translated):... 2254 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2255 # that Summer Time will be reduced from seven to five months, starting 2256 # this year.... 2257 # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 2258 # [translated], says "summer time will ... take effect on the first Sunday 2259 # in May, and end on the last Sunday of September. 2260 2261 # From Arthur David Olson (2001-01-25): 2262 # The 2001-01-24 traditional Washington Post contained the page one 2263 # story "Timely Issue Divides Mexicans."... 2264 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2265 # ... Mexico City Mayor Lopez Obrador "...is threatening to keep 2266 # Mexico City and its 20 million residents on a different time than 2267 # the rest of the country..." In particular, Lopez Obrador would abolish 2268 # observation of Daylight Saving Time. 2269 2270 # <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 2271 # Official statute published by the Energy Department 2272 # </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2273 # and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 2274 2275 # From Paul Eggert (2001-03-03): 2276 # 2277 # <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 2278 # James F. Smith writes in today's LA Times 2279 # </a> 2280 # * Sonora will continue to observe standard time. 2281 # * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 2282 # the Federal District will not adopt DST. 2283 # * 4 of 16 district leaders announced they'll ignore the decree. 2284 # * The decree does not affect federal-controlled facilities including 2285 # the airport, banks, hospitals, and schools. 2286 # 2287 # For now we'll assume that the Federal District will bow to federal rules. 2288 2289 # From Jesper Norgaard (2001-04-01): 2290 # I found some references to the Mexican application of daylight 2291 # saving, which modifies what I had already sent you, stating earlier 2292 # that a number of northern Mexican states would go on daylight 2293 # saving. The modification reverts this to only cover Baja California 2294 # (Norte), while all other states (except Sonora, who has no daylight 2295 # saving all year) will follow the original decree of president 2296 # Vicente Fox, starting daylight saving May 6, 2001 and ending 2297 # September 30, 2001. 2298 # References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 2299 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2300 2301 # From Reuters (2001-09-04): 2302 # Mexico's Supreme Court on Tuesday declared that daylight savings was 2303 # unconstitutional in Mexico City, creating the possibility the 2304 # capital will be in a different time zone from the rest of the nation 2305 # next year.... The Supreme Court's ruling takes effect at 2:00 2306 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2307 # standard time. "This is so residents of the Federal District are not 2308 # subject to unexpected time changes," a statement from the court said. 2309 2310 # From Jesper Norgaard Welen (2002-03-12): 2311 # ... consulting my local grocery store(!) and my coworkers, they all insisted 2312 # that a new decision had been made to reinstate US style DST in Mexico.... 2313 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2314 # confirms this. Sonora as usual is the only state where DST is not applied. 2315 2316 # From Steffen Thorsen (2009-12-28): 2317 # 2318 # Steffen Thorsen wrote: 2319 # > Mexico's House of Representatives has approved a proposal for northern 2320 # > Mexico's border cities to share the same daylight saving schedule as 2321 # > the United States. 2322 # Now this has passed both the Congress and the Senate, so starting from 2323 # 2010, some border regions will be the same: 2324 # <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2325 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2326 # </a> 2327 # <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2328 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2329 # </a> 2330 # (Spanish) 2331 # 2332 # Could not find the new law text, but the proposed law text changes are here: 2333 # <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2334 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2335 # </a> 2336 # (Gaceta Parlamentaria) 2337 # 2338 # There is also a list of the votes here: 2339 # <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2340 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2341 # </a> 2342 # 2343 # Our page: 2344 # <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2345 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2346 # </a> 2347 2348 # From Arthur David Olson (2010-01-20): 2349 # The page 2350 # <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2351 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2352 # </a> 2353 # includes this text: 2354 # En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2355 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2356 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2357 # Tamaulipas, la aplicación de este horario estacional surtirá efecto 2358 # desde las dos horas del segundo domingo de marzo y concluirá a las dos 2359 # horas del primer domingo de noviembre. 2360 # En los municipios fronterizos que se encuentren ubicados en la franja 2361 # fronteriza norte en el territorio comprendido entre la línea 2362 # internacional y la línea paralela ubicada a una distancia de veinte 2363 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2364 # interior del país, la aplicación de este horario estacional surtirá 2365 # efecto desde las dos horas del segundo domingo de marzo y concluirá a 2366 # las dos horas del primer domingo de noviembre. 2367 2368 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2369 Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2370 Rule Mexico 1939 only - Jun 25 0:00 0 S 2371 Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2372 Rule Mexico 1941 only - Apr 1 0:00 0 S 2373 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2374 Rule Mexico 1944 only - May 1 0:00 0 S 2375 Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2376 Rule Mexico 1950 only - Jul 30 0:00 0 S 2377 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2378 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2379 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2380 Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2381 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2382 Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2383 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2384 # Quintana Roo 2385 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2386 -6:00 - CST 1981 Dec 23 2387 -5:00 Mexico E%sT 1998 Aug 2 2:00 2388 -6:00 Mexico C%sT 2389 # Campeche, Yucatan 2390 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2391 -6:00 - CST 1981 Dec 23 2392 -5:00 - EST 1982 Dec 2 2393 -6:00 Mexico C%sT 2394 # Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2395 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2396 -6:00 - CST 1988 2397 -6:00 US C%sT 1989 2398 -6:00 Mexico C%sT 2010 2399 -6:00 US C%sT 2400 # Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 2401 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2402 -6:00 - CST 1988 2403 -6:00 US C%sT 1989 2404 -6:00 Mexico C%sT 2405 # Central Mexico 2406 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2407 -7:00 - MST 1927 Jun 10 23:00 2408 -6:00 - CST 1930 Nov 15 2409 -7:00 - MST 1931 May 1 23:00 2410 -6:00 - CST 1931 Oct 2411 -7:00 - MST 1932 Apr 1 2412 -6:00 Mexico C%sT 2001 Sep 30 02:00 2413 -6:00 - CST 2002 Feb 20 2414 -6:00 Mexico C%sT 2415 # Chihuahua (near US border) 2416 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2417 -7:00 - MST 1927 Jun 10 23:00 2418 -6:00 - CST 1930 Nov 15 2419 -7:00 - MST 1931 May 1 23:00 2420 -6:00 - CST 1931 Oct 2421 -7:00 - MST 1932 Apr 1 2422 -6:00 - CST 1996 2423 -6:00 Mexico C%sT 1998 2424 -6:00 - CST 1998 Apr Sun>=1 3:00 2425 -7:00 Mexico M%sT 2010 2426 -7:00 US M%sT 2427 # Chihuahua (away from US border) 2428 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2429 -7:00 - MST 1927 Jun 10 23:00 2430 -6:00 - CST 1930 Nov 15 2431 -7:00 - MST 1931 May 1 23:00 2432 -6:00 - CST 1931 Oct 2433 -7:00 - MST 1932 Apr 1 2434 -6:00 - CST 1996 2435 -6:00 Mexico C%sT 1998 2436 -6:00 - CST 1998 Apr Sun>=1 3:00 2437 -7:00 Mexico M%sT 2438 # Sonora 2439 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2440 -7:00 - MST 1927 Jun 10 23:00 2441 -6:00 - CST 1930 Nov 15 2442 -7:00 - MST 1931 May 1 23:00 2443 -6:00 - CST 1931 Oct 2444 -7:00 - MST 1932 Apr 1 2445 -6:00 - CST 1942 Apr 24 2446 -7:00 - MST 1949 Jan 14 2447 -8:00 - PST 1970 2448 -7:00 Mexico M%sT 1999 2449 -7:00 - MST 2450 2451 # From Alexander Krivenyshev (2010-04-21): 2452 # According to news, Bahía de Banderas (Mexican state of Nayarit) 2453 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2454 # share the same time zone as nearby city Puerto Vallarta, Jalisco). 2455 # 2456 # (Spanish) 2457 # Bahía de Banderas homologa su horario al del centro del 2458 # país, a partir de este domingo 2459 # <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2460 # http://www.nayarit.gob.mx/notes.asp?id=20748 2461 # </a> 2462 # 2463 # Bahía de Banderas homologa su horario con el del Centro del 2464 # País 2465 # <a href="http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50"> 2466 # http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50" 2467 # </a> 2468 # 2469 # (English) 2470 # Puerto Vallarta and Bahía de Banderas: One Time Zone 2471 # <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2472 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2473 # </a> 2474 # 2475 # or 2476 # <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2477 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2478 # </a> 2479 # 2480 # "Mexico's Senate approved the amendments to the Mexican Schedule System that 2481 # will allow Bahía de Banderas and Puerto Vallarta to share the same time 2482 # zone ..." 2483 # Baja California Sur, Nayarit, Sinaloa 2484 2485 # From Arthur David Olson (2010-05-01): 2486 # Use "Bahia_Banderas" to keep the name to fourteen characters. 2487 2488 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2489 -7:00 - MST 1927 Jun 10 23:00 2490 -6:00 - CST 1930 Nov 15 2491 -7:00 - MST 1931 May 1 23:00 2492 -6:00 - CST 1931 Oct 2493 -7:00 - MST 1932 Apr 1 2494 -6:00 - CST 1942 Apr 24 2495 -7:00 - MST 1949 Jan 14 2496 -8:00 - PST 1970 2497 -7:00 Mexico M%sT 2498 2499 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2500 -7:00 - MST 1927 Jun 10 23:00 2501 -6:00 - CST 1930 Nov 15 2502 -7:00 - MST 1931 May 1 23:00 2503 -6:00 - CST 1931 Oct 2504 -7:00 - MST 1932 Apr 1 2505 -6:00 - CST 1942 Apr 24 2506 -7:00 - MST 1949 Jan 14 2507 -8:00 - PST 1970 2508 -7:00 Mexico M%sT 2010 Apr 4 2:00 2509 -6:00 Mexico C%sT 2510 2511 # Baja California (near US border) 2512 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2513 -7:00 - MST 1924 2514 -8:00 - PST 1927 Jun 10 23:00 2515 -7:00 - MST 1930 Nov 15 2516 -8:00 - PST 1931 Apr 1 2517 -8:00 1:00 PDT 1931 Sep 30 2518 -8:00 - PST 1942 Apr 24 2519 -8:00 1:00 PWT 1945 Aug 14 23:00u 2520 -8:00 1:00 PPT 1945 Nov 12 # Peace 2521 -8:00 - PST 1948 Apr 5 2522 -8:00 1:00 PDT 1949 Jan 14 2523 -8:00 - PST 1954 2524 -8:00 CA P%sT 1961 2525 -8:00 - PST 1976 2526 -8:00 US P%sT 1996 2527 -8:00 Mexico P%sT 2001 2528 -8:00 US P%sT 2002 Feb 20 2529 -8:00 Mexico P%sT 2010 2530 -8:00 US P%sT 2531 # Baja California (away from US border) 2532 Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2533 -7:00 - MST 1924 2534 -8:00 - PST 1927 Jun 10 23:00 2535 -7:00 - MST 1930 Nov 15 2536 -8:00 - PST 1931 Apr 1 2537 -8:00 1:00 PDT 1931 Sep 30 2538 -8:00 - PST 1942 Apr 24 2539 -8:00 1:00 PWT 1945 Aug 14 23:00u 2540 -8:00 1:00 PPT 1945 Nov 12 # Peace 2541 -8:00 - PST 1948 Apr 5 2542 -8:00 1:00 PDT 1949 Jan 14 2543 -8:00 - PST 1954 2544 -8:00 CA P%sT 1961 2545 -8:00 - PST 1976 2546 -8:00 US P%sT 1996 2547 -8:00 Mexico P%sT 2001 2548 -8:00 US P%sT 2002 Feb 20 2549 -8:00 Mexico P%sT 2550 # From Paul Eggert (2006-03-22): 2551 # Formerly there was an America/Ensenada zone, which differed from 2552 # America/Tijuana only in that it did not observe DST from 1976 2553 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2554 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2555 # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2556 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2557 # DST-observance was a town-by-town matter back then. This concerns 2558 # data after 1970 so most likely there should be at least one Zone 2559 # other than America/Tijuana for Baja, but it's not clear yet what its 2560 # name or contents should be. 2561 # 2562 # Revillagigedo Is 2563 # no information 2564 2565 ############################################################################### 2566 2567 # Anguilla 2568 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2569 Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 2570 -4:00 - AST 2571 2572 # Antigua and Barbuda 2573 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2574 Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2575 -5:00 - EST 1951 2576 -4:00 - AST 2577 2578 # Bahamas 2579 # 2580 # From Sue Williams (2006-12-07): 2581 # The Bahamas announced about a month ago that they plan to change their DST 2582 # rules to sync with the U.S. starting in 2007.... 2583 # http://www.jonesbahamas.com/?c=45&a=10412 2584 2585 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2586 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2587 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2588 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2589 Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 2590 -5:00 Bahamas E%sT 1976 2591 -5:00 US E%sT 2592 2593 # Barbados 2594 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2595 Rule Barb 1977 only - Jun 12 2:00 1:00 D 2596 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2597 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2598 Rule Barb 1979 only - Sep 30 2:00 0 S 2599 Rule Barb 1980 only - Sep 25 2:00 0 S 2600 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2601 Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 2602 -3:58:28 - BMT 1932 # Bridgetown Mean Time 2603 -4:00 Barb A%sT 2604 2605 # Belize 2606 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2607 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2608 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2609 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2610 Rule Belize 1973 only - Dec 5 0:00 1:00 D 2611 Rule Belize 1974 only - Feb 9 0:00 0 S 2612 Rule Belize 1982 only - Dec 18 0:00 1:00 D 2613 Rule Belize 1983 only - Feb 12 0:00 0 S 2614 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2615 Zone America/Belize -5:52:48 - LMT 1912 Apr 2616 -6:00 Belize C%sT 2617 2618 # Bermuda 2619 2620 # From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2621 2622 # Next year, however, clocks in the US will go forward on the second Sunday 2623 # in March, until the first Sunday in November. And, after the Time Zone 2624 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2625 # Friday, the same thing will happen in Bermuda. 2626 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2627 2628 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2629 Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 2630 -4:00 - AST 1974 Apr 28 2:00 2631 -4:00 Bahamas A%sT 1976 2632 -4:00 US A%sT 2633 2634 # Cayman Is 2635 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2636 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2637 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2638 -5:00 - EST 2639 2640 # Costa Rica 2641 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2642 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2643 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2644 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2645 # IATA SSIM (1991-09) says the following was at 1:00; 2646 # go with Shanks & Pottenger. 2647 Rule CR 1991 only - Jul 1 0:00 0 S 2648 Rule CR 1992 only - Mar 15 0:00 0 S 2649 # There are too many San Joses elsewhere, so we'll use `Costa Rica'. 2650 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2651 Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 2652 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 2653 -6:00 CR C%sT 2654 # Coco 2655 # no information; probably like America/Costa_Rica 2656 2657 # Cuba 2658 2659 # From Arthur David Olson (1999-03-29): 2660 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2661 # the Cuban National Team and the Baltimore Orioles was carried live on 2662 # the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2663 # During the game, play-by-play announcer Jim Hunter noted that 2664 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2665 # Time today." (The "two hour" remark referred to losing one hour of 2666 # sleep on 1999-03-28--when the announcers were in Cuba as it switched 2667 # to DST--and one more hour on 1999-04-04--when the announcers will have 2668 # returned to Baltimore, which switches on that date.) 2669 2670 # From Evert van der Veer via Steffen Thorsen (2004-10-28): 2671 # Cuba is not going back to standard time this year. 2672 # From Paul Eggert (2006-03-22): 2673 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2674 # says that it's due to a problem at the Antonio Guiteras 2675 # thermoelectric plant, and says "This October there will be no return 2676 # to normal hours (after daylight saving time)". 2677 # For now, let's assume that it's a temporary measure. 2678 2679 # From Carlos A. Carnero Delgado (2005-11-12): 2680 # This year (just like in 2004-2005) there's no change in time zone 2681 # adjustment in Cuba. We will stay in daylight saving time: 2682 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2683 2684 # From Jesper Norgaard Welen (2006-10-21): 2685 # An article in GRANMA INTERNACIONAL claims that Cuba will end 2686 # the 3 years of permanent DST next weekend, see 2687 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2688 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2689 # watches should be set back one hour -- going back to 00:00 hours -- returning 2690 # to the normal schedule.... 2691 2692 # From Paul Eggert (2007-03-02): 2693 # http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2694 # says Cuban clocks will advance at midnight on March 10. 2695 # For lack of better information, assume Cuba will use US rules, 2696 # except that it switches at midnight standard time as usual. 2697 # 2698 # From Steffen Thorsen (2007-10-25): 2699 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2700 # earlier - on the last Sunday of October, just like in 2006. 2701 # 2702 # He supplied these references: 2703 # 2704 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2705 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2706 # 2707 # From Alex Kryvenishev (2007-10-25): 2708 # Here is also article from Granma (Cuba): 2709 # 2710 # [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2711 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2712 # 2713 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2714 2715 # From Arthur David Olson (2008-03-09): 2716 # I'm in Maryland which is now observing United States Eastern Daylight 2717 # Time. At 9:44 local time I used RealPlayer to listen to 2718 # <a href="http://media.enet.cu/radioreloj"> 2719 # http://media.enet.cu/radioreloj 2720 # </a>, a Cuban information station, and heard 2721 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2722 # indicating that Cuba is still on standard time. 2723 2724 # From Steffen Thorsen (2008-03-12): 2725 # It seems that Cuba will start DST on Sunday, 2007-03-16... 2726 # It was announced yesterday, according to this source (in Spanish): 2727 # <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2728 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2729 # </a> 2730 # 2731 # Some more background information is posted here: 2732 # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2733 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2734 # </a> 2735 # 2736 # The article also says that Cuba has been observing DST since 1963, 2737 # while Shanks (and tzdata) has 1965 as the first date (except in the 2738 # 1940's). Many other web pages in Cuba also claim that it has been 2739 # observed since 1963, but with the exception of 1970 - an exception 2740 # which is not present in tzdata/Shanks. So there is a chance we need to 2741 # change some historic records as well. 2742 # 2743 # One example: 2744 # <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2745 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2746 # </a> 2747 2748 # From Jesper Norgaard Welen (2008-03-13): 2749 # The Cuban time change has just been confirmed on the most authoritative 2750 # web site, the Granma. Please check out 2751 # <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2752 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2753 # </a> 2754 # 2755 # Basically as expected after Steffen Thorsens information, the change 2756 # will take place midnight between Saturday and Sunday. 2757 2758 # From Arthur David Olson (2008-03-12): 2759 # Assume Sun>=15 (third Sunday) going forward. 2760 2761 # From Alexander Krivenyshev (2009-03-04) 2762 # According to the Radio Reloj - Cuba will start Daylight Saving Time on 2763 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2764 # not on midnight March 14 / March 15 as previously thought. 2765 # 2766 # <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2767 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2768 # (in Spanish) 2769 # </a> 2770 2771 # From Arthur David Olson (2009-03-09) 2772 # I listened over the Internet to 2773 # <a href="http://media.enet.cu/readioreloj"> 2774 # http://media.enet.cu/readioreloj 2775 # </a> 2776 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2777 # the time was announced as "diez cinco"--the same time as here, indicating 2778 # that has indeed switched to DST. Assume second Sunday from 2009 forward. 2779 2780 # From Steffen Thorsen (2011-03-08): 2781 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2782 # this year. Nothing about the end date known so far (if that has 2783 # changed at all). 2784 # 2785 # Source: 2786 # <a href="http://granma.co.cu/2011/03/08/nacional/artic01.html"> 2787 # http://granma.co.cu/2011/03/08/nacional/artic01.html 2788 # </a> 2789 # 2790 # Our info: 2791 # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html"> 2792 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2793 # </a> 2794 # 2795 # From Steffen Thorsen (2011-10-30) 2796 # Cuba will end DST two weeks later this year. Instead of going back 2797 # tonight, it has been delayed to 2011-11-13 at 01:00. 2798 # 2799 # One source (Spanish) 2800 # <a href="http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html"> 2801 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2802 # </a> 2803 # 2804 # Our page: 2805 # <a href="http://www.timeanddate.com/news/time/cuba-time-changes-2011.html"> 2806 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2807 # </a> 2808 # 2809 # From Steffen Thorsen (2012-03-01) 2810 # According to Radio Reloj, Cuba will start DST on Midnight between March 2811 # 31 and April 1. 2812 # 2813 # Radio Reloj has the following info (Spanish): 2814 # <a href="http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril"> 2815 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2816 # </a> 2817 # 2818 # Our info on it: 2819 # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html"> 2820 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2821 # </a> 2822 2823 # From Steffen Thorsen (2012-11-03): 2824 # Radio Reloj and many other sources report that Cuba is changing back 2825 # to standard time on 2012-11-04: 2826 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2827 # From Paul Eggert (2012-11-03): 2828 # For now, assume the future rule is first Sunday in November. 2829 2830 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2831 Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2832 Rule Cuba 1928 only - Oct 10 0:00 0 S 2833 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2834 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2835 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2836 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2837 Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2838 Rule Cuba 1965 only - Sep 30 0:00 0 S 2839 Rule Cuba 1966 only - May 29 0:00 1:00 D 2840 Rule Cuba 1966 only - Oct 2 0:00 0 S 2841 Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2842 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2843 Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2844 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2845 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2846 Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2847 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2848 Rule Cuba 1978 only - May 7 0:00 1:00 D 2849 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2850 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2851 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2852 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2853 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2854 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2855 Rule Cuba 1996 only - Oct 6 0:00s 0 S 2856 Rule Cuba 1997 only - Oct 12 0:00s 0 S 2857 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2858 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2859 Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D 2860 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2861 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2862 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2863 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2864 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2865 Rule Cuba 2011 only - Nov 13 0:00s 0 S 2866 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2867 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2868 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2869 2870 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2871 Zone America/Havana -5:29:28 - LMT 1890 2872 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2873 -5:00 Cuba C%sT 2874 2875 # Dominica 2876 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2877 Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 2878 -4:00 - AST 2879 2880 # Dominican Republic 2881 2882 # From Steffen Thorsen (2000-10-30): 2883 # Enrique Morales reported to me that the Dominican Republic has changed the 2884 # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2885 # http://www.listin.com.do/antes/261000/republica/princi.html 2886 2887 # From Paul Eggert (2000-12-04): 2888 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2889 2890 # From Rives McDow (2000-12-01): 2891 # Dominican Republic changed its mind and presidential decree on Tuesday, 2892 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2893 # Dominican Republic will be reverting to 8 hours from the International Date 2894 # Line, and will not be using DST in the foreseeable future. The reason they 2895 # decided to use DST was to be in synch with Puerto Rico, who was also going 2896 # to implement DST. When Puerto Rico didn't implement DST, the president 2897 # decided to revert. 2898 2899 2900 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2901 Rule DR 1966 only - Oct 30 0:00 1:00 D 2902 Rule DR 1967 only - Feb 28 0:00 0 S 2903 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2904 Rule DR 1970 only - Feb 21 0:00 0 S 2905 Rule DR 1971 only - Jan 20 0:00 0 S 2906 Rule DR 1972 1974 - Jan 21 0:00 0 S 2907 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2908 Zone America/Santo_Domingo -4:39:36 - LMT 1890 2909 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2910 -5:00 DR E%sT 1974 Oct 27 2911 -4:00 - AST 2000 Oct 29 02:00 2912 -5:00 US E%sT 2000 Dec 3 01:00 2913 -4:00 - AST 2914 2915 # El Salvador 2916 2917 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2918 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2919 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2920 # There are too many San Salvadors elsewhere, so use America/El_Salvador 2921 # instead of America/San_Salvador. 2922 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2923 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2924 -6:00 Salv C%sT 2925 2926 # Grenada 2927 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2928 Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 2929 -4:00 - AST 2930 2931 # Guadeloupe 2932 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2933 Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 2934 -4:00 - AST 2935 # St Barthelemy 2936 Link America/Guadeloupe America/St_Barthelemy 2937 # St Martin (French part) 2938 Link America/Guadeloupe America/Marigot 2939 2940 # Guatemala 2941 # 2942 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2943 # Diario Co Latino, at 2944 # http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2945 # says in an article dated 2006-04-19 that the Guatemalan government had 2946 # decided on that date to advance official time by 60 minutes, to lessen the 2947 # impact of the elevated cost of oil.... Daylight saving time will last from 2948 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2949 # From Paul Eggert (2006-06-22): 2950 # The Ministry of Energy and Mines, press release CP-15/2006 2951 # (2006-04-19), says DST ends at 24:00. See 2952 # <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2953 2954 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2955 Rule Guat 1973 only - Nov 25 0:00 1:00 D 2956 Rule Guat 1974 only - Feb 24 0:00 0 S 2957 Rule Guat 1983 only - May 21 0:00 1:00 D 2958 Rule Guat 1983 only - Sep 22 0:00 0 S 2959 Rule Guat 1991 only - Mar 23 0:00 1:00 D 2960 Rule Guat 1991 only - Sep 7 0:00 0 S 2961 Rule Guat 2006 only - Apr 30 0:00 1:00 D 2962 Rule Guat 2006 only - Oct 1 0:00 0 S 2963 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2964 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2965 -6:00 Guat C%sT 2966 2967 # Haiti 2968 # From Gwillim Law (2005-04-15): 2969 # Risto O. Nykanen wrote me that Haiti is now on DST. 2970 # I searched for confirmation, and I found a 2971 # <a href="http://www.haitianconsulate.org/time.doc"> press release 2972 # on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2973 # </a>. Translated from French, it says: 2974 # 2975 # "The Prime Minister's Communication Office notifies the public in general 2976 # and the press in particular that, following a decision of the Interior 2977 # Ministry and the Territorial Collectivities [I suppose that means the 2978 # provinces], Haiti will move to Eastern Daylight Time in the night from next 2979 # Saturday the 2nd to Sunday the 3rd. 2980 # 2981 # "Consequently, the Prime Minister's Communication Office wishes to inform 2982 # the population that the country's clocks will be set forward one hour 2983 # starting at midnight. This provision will hold until the last Saturday in 2984 # October 2005. 2985 # 2986 # "Port-au-Prince, March 31, 2005" 2987 # 2988 # From Steffen Thorsen (2006-04-04): 2989 # I have been informed by users that Haiti observes DST this year like 2990 # last year, so the current "only" rule for 2005 might be changed to a 2991 # "max" rule or to last until 2006. (Who knows if they will observe DST 2992 # next year or if they will extend their DST like US/Canada next year). 2993 # 2994 # I have found this article about it (in French): 2995 # http://www.haitipressnetwork.com/news.cfm?articleID=7612 2996 # 2997 # The reason seems to be an energy crisis. 2998 2999 # From Stephen Colebourne (2007-02-22): 3000 # Some IATA info: Haiti won't be having DST in 2007. 3001 3002 # From Steffen Thorsen (2012-03-11): 3003 # According to several news sources, Haiti will observe DST this year, 3004 # apparently using the same start and end date as USA/Canada. 3005 # So this means they have already changed their time. 3006 # 3007 # (Sources in French): 3008 # <a href="http://www.alterpresse.org/spip.php?article12510"> 3009 # http://www.alterpresse.org/spip.php?article12510 3010 # </a> 3011 # <a href="http://radiovision2000haiti.net/home/?p=13253"> 3012 # http://radiovision2000haiti.net/home/?p=13253 3013 # </a> 3014 # 3015 # Our coverage: 3016 # <a href="http://www.timeanddate.com/news/time/haiti-dst-2012.html"> 3017 # http://www.timeanddate.com/news/time/haiti-dst-2012.html 3018 # </a> 3019 3020 # From Arthur David Olson (2012-03-11): 3021 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3022 # 3:00 a.m. rather than the traditional Haitian jump at midnight. 3023 # Assume a US-style fall back as well XXX. 3024 # Do not yet assume that the change carries forward past 2012 XXX. 3025 3026 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3027 Rule Haiti 1983 only - May 8 0:00 1:00 D 3028 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3029 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3030 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3031 # Go with IATA. 3032 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3033 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3034 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3035 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3036 Rule Haiti 2012 only - Mar Sun>=8 2:00 1:00 D 3037 Rule Haiti 2012 only - Nov Sun>=1 2:00 0 S 3038 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3039 Zone America/Port-au-Prince -4:49:20 - LMT 1890 3040 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3041 -5:00 Haiti E%sT 3042 3043 # Honduras 3044 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3045 3046 # From Paul Eggert (2006-05-05): 3047 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3048 # saying Honduras will start using DST midnight Saturday, effective 4 3049 # months until September. La Tribuna reported today 3050 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3051 # of Honduras, refused to back down on this. 3052 3053 # From Jesper Norgaard Welen (2006-08-08): 3054 # It seems that Honduras has returned from DST to standard time this Monday at 3055 # 00:00 hours (prolonging Sunday to 25 hours duration). 3056 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3057 3058 # From Paul Eggert (2006-08-08): 3059 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 3060 # <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 3061 # It mentions executive decree 18-2006. 3062 3063 # From Steffen Thorsen (2006-08-17): 3064 # Honduras will observe DST from 2007 to 2009, exact dates are not 3065 # published, I have located this authoritative source: 3066 # http://www.presidencia.gob.hn/noticia.aspx?nId=47 3067 3068 # From Steffen Thorsen (2007-03-30): 3069 # http://www.laprensahn.com/pais_nota.php?id04962=7386 3070 # So it seems that Honduras will not enter DST this year.... 3071 3072 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3073 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3074 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3075 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3076 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3077 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3078 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3079 -6:00 Hond C%sT 3080 # 3081 # Great Swan I ceded by US to Honduras in 1972 3082 3083 # Jamaica 3084 3085 # From Bob Devine (1988-01-28): 3086 # Follows US rules. 3087 3088 # From U. S. Naval Observatory (1989-01-19): 3089 # JAMAICA 5 H BEHIND UTC 3090 3091 # From Shanks & Pottenger: 3092 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3093 Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston 3094 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 3095 -5:00 - EST 1974 Apr 28 2:00 3096 -5:00 US E%sT 1984 3097 -5:00 - EST 3098 3099 # Martinique 3100 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3101 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3102 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3103 -4:00 - AST 1980 Apr 6 3104 -4:00 1:00 ADT 1980 Sep 28 3105 -4:00 - AST 3106 3107 # Montserrat 3108 # From Paul Eggert (2006-03-22): 3109 # In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 3110 # world.gazetteer.com says Cork Hill is the most populous location now. 3111 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3112 Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 3113 -4:00 - AST 3114 3115 # Nicaragua 3116 # 3117 # This uses Shanks & Pottenger for times before 2005. 3118 # 3119 # From Steffen Thorsen (2005-04-12): 3120 # I've got reports from 8 different people that Nicaragua just started 3121 # DST on Sunday 2005-04-10, in order to save energy because of 3122 # expensive petroleum. The exact end date for DST is not yet 3123 # announced, only "September" but some sites also say "mid-September". 3124 # Some background information is available on the President's official site: 3125 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3126 # The Decree, no 23-2005 is available here: 3127 # 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 3128 # 3129 # From Paul Eggert (2005-05-01): 3130 # The decree doesn't say anything about daylight saving, but for now let's 3131 # assume that it is daylight saving.... 3132 # 3133 # From Gwillim Law (2005-04-21): 3134 # The Associated Press story on the time change, which can be found at 3135 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3136 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3137 # time that a change of clocks was applied to save energy was in the year 2000 3138 # during the Arnoldo Aleman administration."... 3139 # The northamerica file says that Nicaragua has been on UTC-6 continuously 3140 # since December 1998. I wasn't able to find any details of Nicaraguan time 3141 # changes in 2000. Perhaps a note could be added to the northamerica file, to 3142 # the effect that we have indirect evidence that DST was observed in 2000. 3143 # 3144 # From Jesper Norgaard Welen (2005-11-02): 3145 # Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3146 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3147 # (2005-09-26) 3148 # 3149 # From Jesper Norgaard Welen (2006-05-05): 3150 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3151 # (my informal translation) 3152 # By order of the president of the republic, Enrique Bolanos, Nicaragua 3153 # advanced by sixty minutes their official time, yesterday at 2 in the 3154 # morning, and will stay that way until 30.th. of september. 3155 # 3156 # From Jesper Norgaard Welen (2006-09-30): 3157 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3158 # My informal translation runs: 3159 # The natural sun time is restored in all the national territory, in that the 3160 # time is returned one hour at 01:00 am of October 1 of 2006. 3161 # 3162 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3163 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3164 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3165 Rule Nic 2005 only - Apr 10 0:00 1:00 D 3166 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3167 Rule Nic 2006 only - Apr 30 2:00 1:00 D 3168 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3169 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3170 Zone America/Managua -5:45:08 - LMT 1890 3171 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3172 -6:00 - CST 1973 May 3173 -5:00 - EST 1975 Feb 16 3174 -6:00 Nic C%sT 1992 Jan 1 4:00 3175 -5:00 - EST 1992 Sep 24 3176 -6:00 - CST 1993 3177 -5:00 - EST 1997 3178 -6:00 Nic C%sT 3179 3180 # Panama 3181 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3182 Zone America/Panama -5:18:08 - LMT 1890 3183 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 3184 -5:00 - EST 3185 3186 # Puerto Rico 3187 # There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 3188 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3189 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3190 -4:00 - AST 1942 May 3 3191 -4:00 US A%sT 1946 3192 -4:00 - AST 3193 3194 # St Kitts-Nevis 3195 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3196 Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 3197 -4:00 - AST 3198 3199 # St Lucia 3200 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3201 Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries 3202 -4:04:00 - CMT 1912 # Castries Mean Time 3203 -4:00 - AST 3204 3205 # St Pierre and Miquelon 3206 # There are too many St Pierres elsewhere, so we'll use `Miquelon'. 3207 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3208 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3209 -4:00 - AST 1980 May 3210 -3:00 - PMST 1987 # Pierre & Miquelon Time 3211 -3:00 Canada PM%sT 3212 3213 # St Vincent and the Grenadines 3214 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3215 Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 3216 -4:04:56 - KMT 1912 # Kingstown Mean Time 3217 -4:00 - AST 3218 3219 # Turks and Caicos 3220 # 3221 # From Chris Dunn in 3222 # <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 3223 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3224 # daylight saving dates for time changes have been adjusted to match 3225 # the recent U.S. change of dates. 3226 # 3227 # From Brian Inglis (2007-04-28): 3228 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3229 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3230 # rows before that there is an out of date entry for Oct: 3231 # "Eastern Standard Times Begins 2007 3232 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3233 # indicating that the normal ET rules are followed. 3234 # 3235 # From Paul Eggert (2006-05-01): 3236 # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 3237 # says they switch at midnight. Go with Shanks & Pottenger. 3238 # 3239 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3240 Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D 3241 Rule TC 1979 2006 - Oct lastSun 2:00 0 S 3242 Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 3243 Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D 3244 Rule TC 2007 max - Nov Sun>=1 2:00 0 S 3245 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3246 Zone America/Grand_Turk -4:44:32 - LMT 1890 3247 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 3248 -5:00 TC E%sT 3249 3250 # British Virgin Is 3251 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3252 Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 3253 -4:00 - AST 3254 3255 # Virgin Is 3256 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3257 Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 3258 -4:00 - AST