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@iana.org 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 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 418 # north of the Salmon River, and the towns of Burgdorf and Warren), 419 # Nevada (except West Wendover), Oregon (except the northern 3/4 of 420 # Malheur county), and Washington 421 # 422 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 423 Rule CA 1948 only - Mar 14 2:00 1:00 D 424 Rule CA 1949 only - Jan 1 2:00 0 S 425 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 426 Rule CA 1950 1961 - Sep lastSun 2:00 0 S 427 Rule CA 1962 1966 - Oct lastSun 2:00 0 S 428 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 429 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 430 -8:00 US P%sT 1946 431 -8:00 CA P%sT 1967 432 -8:00 US P%sT 433 434 # Alaska 435 # AK%sT is the modern abbreviation for -9:00 per USNO. 436 # 437 # From Paul Eggert (2001-05-30): 438 # Howse writes that Alaska switched from the Julian to the Gregorian calendar, 439 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 440 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 441 # also a Friday. Include only the time zone part of this transition, 442 # ignoring the switch from Julian to Gregorian, since we can't represent 443 # the Julian calendar. 444 # 445 # As far as we know, none of the exact locations mentioned below were 446 # permanently inhabited in 1867 by anyone using either calendar. 447 # (Yakutat was colonized by the Russians in 1799, but the settlement 448 # was destroyed in 1805 by a Yakutat-kon war party.) However, there 449 # were nearby inhabitants in some cases and for our purposes perhaps 450 # it's best to simply use the official transition. 451 # 452 453 # From Steve Ferguson (2011-01-31): 454 # The author lives in Alaska and many of the references listed are only 455 # available to Alaskan residents. 456 # 457 # <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98"> 458 # http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98 459 # </a> 460 461 # From Arthur David Olson (2011-02-01): 462 # Here's database-relevant material from the 2001 "Alaska History" article: 463 # 464 # On September 20 [1979]...DOT...officials decreed that on April 27, 465 # 1980, Juneau and other nearby communities would move to Yukon Time. 466 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 467 # Pacific Time. 468 # 469 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 470 # Department's September 1979 decision. Juneau and other communities in 471 # northern Southeast reverted to Pacific Time on October 26. 472 # 473 # On October 28 [1983]...the Metlakatla Indian Community Council voted 474 # unanimously to keep the reservation on Pacific Time. 475 # 476 # According to DOT official Joanne Petrie, Indian reservations are not 477 # bound to follow time zones imposed by neighboring jurisdictions. 478 # 479 # (The last is consistent with how the database now handles the Navajo 480 # Nation.) 481 482 # From Arthur David Olson (2011-02-09): 483 # I just spoke by phone with a staff member at the Metlakatla Indian 484 # Community office (using contact information available at 485 # <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla"> 486 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 487 # </a>). 488 # It's shortly after 1:00 here on the east coast of the United States; 489 # the staffer said it was shortly after 10:00 there. When I asked whether 490 # that meant they were on Pacific time, they said no--they were on their 491 # own time. I asked about daylight saving; they said it wasn't used. I 492 # did not inquire about practices in the past. 493 494 # From Arthur David Olson (2011-08-17): 495 # For lack of better information, assume that Metlakatla's 496 # abandonment of use of daylight saving resulted from the 1983 vote. 497 498 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 499 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 500 -8:57:41 - LMT 1900 Aug 20 12:00 501 -8:00 - PST 1942 502 -8:00 US P%sT 1946 503 -8:00 - PST 1969 504 -8:00 US P%sT 1980 Apr 27 2:00 505 -9:00 US Y%sT 1980 Oct 26 2:00 506 -8:00 US P%sT 1983 Oct 30 2:00 507 -9:00 US Y%sT 1983 Nov 30 508 -9:00 US AK%sT 509 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 510 -9:01:13 - LMT 1900 Aug 20 12:00 511 -8:00 - PST 1942 512 -8:00 US P%sT 1946 513 -8:00 - PST 1969 514 -8:00 US P%sT 1983 Oct 30 2:00 515 -9:00 US Y%sT 1983 Nov 30 516 -9:00 US AK%sT 517 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 518 -8:46:18 - LMT 1900 Aug 20 12:00 519 -8:00 - PST 1942 520 -8:00 US P%sT 1946 521 -8:00 - PST 1969 522 -8:00 US P%sT 1983 Oct 30 2:00 523 -8:00 - MeST 524 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 525 -9:18:55 - LMT 1900 Aug 20 12:00 526 -9:00 - YST 1942 527 -9:00 US Y%sT 1946 528 -9:00 - YST 1969 529 -9:00 US Y%sT 1983 Nov 30 530 -9:00 US AK%sT 531 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 532 -9:59:36 - LMT 1900 Aug 20 12:00 533 -10:00 - CAT 1942 534 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 535 -10:00 US CAT/CAPT 1946 # Peace 536 -10:00 - CAT 1967 Apr 537 -10:00 - AHST 1969 538 -10:00 US AH%sT 1983 Oct 30 2:00 539 -9:00 US Y%sT 1983 Nov 30 540 -9:00 US AK%sT 541 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 542 -11:01:38 - LMT 1900 Aug 20 12:00 543 -11:00 - NST 1942 544 -11:00 US N%sT 1946 545 -11:00 - NST 1967 Apr 546 -11:00 - BST 1969 547 -11:00 US B%sT 1983 Oct 30 2:00 548 -9:00 US Y%sT 1983 Nov 30 549 -9:00 US AK%sT 550 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 551 -11:46:38 - LMT 1900 Aug 20 12:00 552 -11:00 - NST 1942 553 -11:00 US N%sT 1946 554 -11:00 - NST 1967 Apr 555 -11:00 - BST 1969 556 -11:00 US B%sT 1983 Oct 30 2:00 557 -10:00 US AH%sT 1983 Nov 30 558 -10:00 US HA%sT 559 # The following switches don't quite make our 1970 cutoff. 560 # 561 # Shanks writes that part of southwest Alaska (e.g. Aniak) 562 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 563 # and another part (e.g. Akiak) made the same switch five weeks later. 564 # 565 # From David Flater (2004-11-09): 566 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 567 # Historic Preservation Commission, provided this information, which 568 # suggests that Unalaska deviated from statutory time from early 1967 569 # possibly until 1983: 570 # 571 # Minutes of the Unalaska City Council Meeting, January 10, 1967: 572 # "Except for St. Paul and Akutan, Unalaska is the only important 573 # location not on Alaska Standard Time. The following resolution was 574 # made by William Robinson and seconded by Henry Swanson: Be it 575 # resolved that the City of Unalaska hereby goes to Alaska Standard 576 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 577 # January 14, Alaska Standard Time.) This resolution was passed with 578 # three votes for and one against." 579 580 # Hawaii 581 582 # From Arthur David Olson (2010-12-09): 583 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 584 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 585 # the article is available at 586 # <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> 587 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 588 # </a> 589 # and indicates that standard time was adopted effective noon, January 590 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 591 # saving for the period between the last Sunday of each April and the 592 # last Sunday of each September, but less than a month later repealed the 593 # act," (page 220), that year-round daylight saving time was in effect 594 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 595 # when clocks changed) and that clocks were changed by 30 minutes 596 # effective the second Sunday of June, 1947 (page 219, with no time of 597 # day given for when clocks changed). A footnote for the 1933 changes 598 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 599 # and Act 163 (approved 21 May 1933)." 600 601 # From Arthur David Olson (2011-01-19): 602 # The following is from "Laws of the Territory of Hawaii Passed by the 603 # Seventeenth Legislature: Regular Session 1933," available (as of 604 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act 605 # 90...At 2 o'clock ante meridian of the last Sunday in April of each 606 # year, the standard time of this Territory shall be advanced one 607 # hour...This Act shall take effect upon its approval. Approved this 26th 608 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 609 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 610 # hereby repealed...This Act shall take effect upon its approval, upon 611 # which date the standard time of this Territory shall be restored to 612 # that existing immediately prior to the taking effect of said Act 90. 613 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 614 # of the Territory of Hawaii." 615 # 616 # Note that 1933-05-21 was a Sunday. 617 # We're left to guess the time of day when Act 163 was approved; guess noon. 618 619 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 620 -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 621 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 622 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 623 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 624 -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 625 -10:00 - HST 626 627 Link Pacific/Honolulu Pacific/Johnston 628 629 # Now we turn to US areas that have diverged from the consensus since 1970. 630 631 # Arizona mostly uses MST. 632 633 # From Paul Eggert (2002-10-20): 634 # 635 # The information in the rest of this paragraph is derived from the 636 # <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 637 # Daylight Saving Time web page (2002-01-23)</a> maintained by the 638 # Arizona State Library, Archives and Public Records. 639 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 640 # time, but by federal law railroads, airlines, bus lines, military 641 # personnel, and some engaged in interstate commerce continued to 642 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 643 # Gazette says that was the date the law changed, and that 04-01 was 644 # the date the state's clocks would change. In 1945 the State of 645 # Arizona used standard time all year, again with exceptions only as 646 # mandated by federal law. Arizona observed DST in 1967, but Arizona 647 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 648 # 649 # Shanks says the 1944 experiment came to an end on 1944-03-17. 650 # Go with the Arizona State Library instead. 651 652 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 653 -7:00 US M%sT 1944 Jan 1 00:01 654 -7:00 - MST 1944 Apr 1 00:01 655 -7:00 US M%sT 1944 Oct 1 00:01 656 -7:00 - MST 1967 657 -7:00 US M%sT 1968 Mar 21 658 -7:00 - MST 659 # From Arthur David Olson (1988-02-13): 660 # A writer from the Inter Tribal Council of Arizona, Inc., 661 # notes in private correspondence dated 1987-12-28 that "Presently, only the 662 # Navajo Nation participates in the Daylight Saving Time policy, due to its 663 # large size and location in three states." (The "only" means that other 664 # tribal nations don't use DST.) 665 # 666 # From Paul Eggert (2013-08-26): 667 # See America/Denver for a zone appropriate for the Navajo Nation. 668 669 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 670 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 671 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 672 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 673 # Teton, Twin Falls, Valley, Washington counties, and the southern 674 # quarter of Idaho county) and eastern Oregon (most of Malheur County) 675 # switched four weeks late in 1974. 676 # 677 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 678 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 679 -8:00 US P%sT 1923 May 13 2:00 680 -7:00 US M%sT 1974 681 -7:00 - MST 1974 Feb 3 2:00 682 -7:00 US M%sT 683 684 # Indiana 685 # 686 # For a map of Indiana's time zone regions, see: 687 # <a href="http://www.mccsc.edu/time.html"> 688 # What time is it in Indiana? 689 # </a> (2006-03-01) 690 # 691 # From Paul Eggert (2007-08-17): 692 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 693 # with the following exceptions: 694 # 695 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 696 # Vandenburgh, and Warrick counties have been like America/Chicago. 697 # 698 # - Dearborn and Ohio counties have been like America/New_York. 699 # 700 # - Clark, Floyd, and Harrison counties have been like 701 # America/Kentucky/Louisville. 702 # 703 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 704 # and Switzerland counties have their own time zone histories as noted below. 705 # 706 # Shanks partitioned Indiana into 345 regions, each with its own time history, 707 # and wrote "Even newspaper reports present contradictory information." 708 # Those Hoosiers! Such a flighty and changeable people! 709 # Fortunately, most of the complexity occurred before our cutoff date of 1970. 710 # 711 # Other than Indianapolis, the Indiana place names are so nondescript 712 # that they would be ambiguous if we left them at the 'America' level. 713 # So we reluctantly put them all in a subdirectory 'America/Indiana'. 714 715 # From Paul Eggert (2005-08-16): 716 # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 717 718 # From Nathan Stratton Treadway (2006-03-30): 719 # http://www.dot.gov/affairs/dot0406.htm [3705 B] 720 # From Deborah Goldsmith (2006-01-18): 721 # http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 722 # From Paul Eggert (2006-01-20): 723 # It says "DOT is relocating the time zone boundary in Indiana to move Starke, 724 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 725 # Eastern Time Zone to the Central Time Zone.... The effective date of 726 # this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 727 # changeover date from standard time to Daylight Saving Time." 728 # Strictly speaking, this means the affected counties will change their 729 # clocks twice that night, but this obviously is in error. The intent 730 # is that 01:59:59 EST be followed by 02:00:00 CDT. 731 732 # From Gwillim Law (2007-02-10): 733 # The Associated Press has been reporting that Pulaski County, Indiana is 734 # going to switch from Central to Eastern Time on March 11, 2007.... 735 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 736 737 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 738 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 739 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 740 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 741 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 742 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 743 -6:00 US C%sT 1920 744 -6:00 Indianapolis C%sT 1942 745 -6:00 US C%sT 1946 746 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 747 -5:00 - EST 1957 Sep 29 2:00 748 -6:00 - CST 1958 Apr 27 2:00 749 -5:00 - EST 1969 750 -5:00 US E%sT 1971 751 -5:00 - EST 2006 752 -5:00 US E%sT 753 # 754 # Eastern Crawford County, Indiana, left its clocks alone in 1974, 755 # as well as from 1976 through 2005. 756 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 757 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 758 Rule Marengo 1951 only - Sep lastSun 2:00 0 S 759 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 760 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 761 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 762 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 763 -6:00 US C%sT 1951 764 -6:00 Marengo C%sT 1961 Apr 30 2:00 765 -5:00 - EST 1969 766 -5:00 US E%sT 1974 Jan 6 2:00 767 -6:00 1:00 CDT 1974 Oct 27 2:00 768 -5:00 US E%sT 1976 769 -5:00 - EST 2006 770 -5:00 US E%sT 771 # 772 # Daviess, Dubois, Knox, and Martin Counties, Indiana, 773 # switched from eastern to central time in April 2006, then switched back 774 # in November 2007. 775 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 776 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 777 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 778 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 779 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 780 Rule Vincennes 1955 only - May 1 0:00 1:00 D 781 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 782 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 783 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 784 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 785 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 786 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 787 -6:00 US C%sT 1946 788 -6:00 Vincennes C%sT 1964 Apr 26 2:00 789 -5:00 - EST 1969 790 -5:00 US E%sT 1971 791 -5:00 - EST 2006 Apr 2 2:00 792 -6:00 US C%sT 2007 Nov 4 2:00 793 -5:00 US E%sT 794 # 795 # Perry County, Indiana, switched from eastern to central time in April 2006. 796 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 797 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 798 Rule Perry 1946 only - Sep lastSun 2:00 0 S 799 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 800 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 801 Rule Perry 1955 only - May 1 0:00 1:00 D 802 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 803 Rule Perry 1960 only - Oct lastSun 2:00 0 S 804 Rule Perry 1961 only - Sep lastSun 2:00 0 S 805 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 806 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 807 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 808 -6:00 US C%sT 1946 809 -6:00 Perry C%sT 1964 Apr 26 2:00 810 -5:00 - EST 1969 811 -5:00 US E%sT 1971 812 -5:00 - EST 2006 Apr 2 2:00 813 -6:00 US C%sT 814 # 815 # Pike County, Indiana moved from central to eastern time in 1977, 816 # then switched back in 2006, then switched back again in 2007. 817 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 818 Rule Pike 1955 only - May 1 0:00 1:00 D 819 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 820 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 821 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 822 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 823 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 824 -6:00 US C%sT 1955 825 -6:00 Pike C%sT 1965 Apr 25 2:00 826 -5:00 - EST 1966 Oct 30 2:00 827 -6:00 US C%sT 1977 Oct 30 2:00 828 -5:00 - EST 2006 Apr 2 2:00 829 -6:00 US C%sT 2007 Nov 4 2:00 830 -5:00 US E%sT 831 # 832 # Starke County, Indiana moved from central to eastern time in 1991, 833 # then switched back in 2006. 834 # From Arthur David Olson (1991-10-28): 835 # An article on page A3 of the Sunday, 1991-10-27 Washington Post 836 # notes that Starke County switched from Central time to Eastern time as of 837 # 1991-10-27. 838 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 839 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 840 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 841 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 842 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 843 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 844 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 845 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 846 -6:00 US C%sT 1947 847 -6:00 Starke C%sT 1962 Apr 29 2:00 848 -5:00 - EST 1963 Oct 27 2:00 849 -6:00 US C%sT 1991 Oct 27 2:00 850 -5:00 - EST 2006 Apr 2 2:00 851 -6:00 US C%sT 852 # 853 # Pulaski County, Indiana, switched from eastern to central time in 854 # April 2006 and then switched back in March 2007. 855 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 856 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 857 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 858 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 859 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 860 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 861 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 862 -6:00 US C%sT 1946 863 -6:00 Pulaski C%sT 1961 Apr 30 2:00 864 -5:00 - EST 1969 865 -5:00 US E%sT 1971 866 -5:00 - EST 2006 Apr 2 2:00 867 -6:00 US C%sT 2007 Mar 11 2:00 868 -5:00 US E%sT 869 # 870 # Switzerland County, Indiana, did not observe DST from 1973 through 2005. 871 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 872 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 873 -6:00 US C%sT 1954 Apr 25 2:00 874 -5:00 - EST 1969 875 -5:00 US E%sT 1973 876 -5:00 - EST 2006 877 -5:00 US E%sT 878 879 # Part of Kentucky left its clocks alone in 1974. 880 # This also includes Clark, Floyd, and Harrison counties in Indiana. 881 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 882 Rule Louisville 1921 only - May 1 2:00 1:00 D 883 Rule Louisville 1921 only - Sep 1 2:00 0 S 884 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 885 Rule Louisville 1941 only - Sep lastSun 2:00 0 S 886 Rule Louisville 1946 only - Jun 2 2:00 0 S 887 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 888 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 889 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 890 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 891 -6:00 US C%sT 1921 892 -6:00 Louisville C%sT 1942 893 -6:00 US C%sT 1946 894 -6:00 Louisville C%sT 1961 Jul 23 2:00 895 -5:00 - EST 1968 896 -5:00 US E%sT 1974 Jan 6 2:00 897 -6:00 1:00 CDT 1974 Oct 27 2:00 898 -5:00 US E%sT 899 # 900 # Wayne County, Kentucky 901 # 902 # From 903 # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 904 # Lake Cumberland LIFE 905 # </a> (1999-01-29) via WKYM-101.7: 906 # Clinton County has joined Wayne County in asking the DoT to change from 907 # the Central to the Eastern time zone.... The Wayne County government made 908 # the same request in December. And while Russell County officials have not 909 # taken action, the majority of respondents to a poll conducted there in 910 # August indicated they would like to change to "fast time" also. 911 # The three Lake Cumberland counties are the farthest east of any U.S. 912 # location in the Central time zone. 913 # 914 # From Rich Wales (2000-08-29): 915 # After prolonged debate, and despite continuing deep differences of opinion, 916 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 917 # (-0500) time. They won't "fall back" this year. See Sara Shipley, 918 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 919 # 920 # From Paul Eggert (2001-07-16): 921 # The final rule was published in the 922 # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 923 # Federal Register 65, 160 (2000-08-17), page 50154-50158. 924 # </a> 925 # 926 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 927 -6:00 US C%sT 1946 928 -6:00 - CST 1968 929 -6:00 US C%sT 2000 Oct 29 2:00 930 -5:00 US E%sT 931 932 933 # From Rives McDow (2000-08-30): 934 # Here ... are all the changes in the US since 1985. 935 # Kearny County, KS (put all of county on central; 936 # previously split between MST and CST) ... 1990-10 937 # Starke County, IN (from CST to EST) ... 1991-10 938 # Oliver County, ND (from MST to CST) ... 1992-10 939 # West Wendover, NV (from PST TO MST) ... 1999-10 940 # Wayne County, KY (from CST to EST) ... 2000-10 941 # 942 # From Paul Eggert (2001-07-17): 943 # We don't know where the line used to be within Kearny County, KS, 944 # so omit that change for now. 945 # See America/Indiana/Knox for the Starke County, IN change. 946 # See America/North_Dakota/Center for the Oliver County, ND change. 947 # West Wendover, NV officially switched from Pacific to mountain time on 948 # 1999-10-31. See the 949 # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 950 # Federal Register 64, 203 (1999-10-21), page 56705-56707. 951 # </a> 952 # However, the Federal Register says that West Wendover already operated 953 # on mountain time, and the rule merely made this official; 954 # hence a separate tz entry is not needed. 955 956 # Michigan 957 # 958 # From Bob Devine (1988-01-28): 959 # Michigan didn't observe DST from 1968 to 1973. 960 # 961 # From Paul Eggert (1999-03-31): 962 # Shanks writes that Michigan started using standard time on 1885-09-18, 963 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 964 # that Detroit kept 965 # 966 # local time until 1900 when the City Council decreed that clocks should 967 # be put back twenty-eight minutes to Central Standard Time. Half the 968 # city obeyed, half refused. After considerable debate, the decision 969 # was rescinded and the city reverted to Sun time. A derisive offer to 970 # erect a sundial in front of the city hall was referred to the 971 # Committee on Sewers. Then, in 1905, Central time was adopted 972 # by city vote. 973 # 974 # This story is too entertaining to be false, so go with Howse over Shanks. 975 # 976 # From Paul Eggert (2001-03-06): 977 # Garland (1927) writes "Cleveland and Detroit advanced their clocks 978 # one hour in 1914." This change is not in Shanks. We have no more 979 # info, so omit this for now. 980 # 981 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 982 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 983 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 984 Rule Detroit 1948 only - Sep lastSun 2:00 0 S 985 Rule Detroit 1967 only - Jun 14 2:00 1:00 D 986 Rule Detroit 1967 only - Oct lastSun 2:00 0 S 987 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 988 Zone America/Detroit -5:32:11 - LMT 1905 989 -6:00 - CST 1915 May 15 2:00 990 -5:00 - EST 1942 991 -5:00 US E%sT 1946 992 -5:00 Detroit E%sT 1973 993 -5:00 US E%sT 1975 994 -5:00 - EST 1975 Apr 27 2:00 995 -5:00 US E%sT 996 # 997 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 998 # switched from EST to CST/CDT in 1973. 999 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1000 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 1001 Rule Menominee 1946 only - Sep lastSun 2:00 0 S 1002 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1003 Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1004 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1005 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1006 -6:00 US C%sT 1946 1007 -6:00 Menominee C%sT 1969 Apr 27 2:00 1008 -5:00 - EST 1973 Apr 29 2:00 1009 -6:00 US C%sT 1010 1011 # Navassa 1012 # administered by the US Fish and Wildlife Service 1013 # claimed by US under the provisions of the 1856 Guano Islands Act 1014 # also claimed by Haiti 1015 # occupied 1857/1900 by the Navassa Phosphate Co 1016 # US lighthouse 1917/1996-09 1017 # currently uninhabited 1018 # see Mark Fineman, "An Isle Rich in Guano and Discord", 1019 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1020 # Jimmy Skaggs, _The Great Guano Rush_ (1994). 1021 1022 ################################################################################ 1023 1024 1025 # From Paul Eggert (2006-03-22): 1026 # A good source for time zone historical data outside the U.S. is 1027 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1028 # San Diego: ACS Publications, Inc. (2003). 1029 # 1030 # Gwillim Law writes that a good source 1031 # for recent time zone data is the International Air Transport 1032 # Association's Standard Schedules Information Manual (IATA SSIM), 1033 # published semiannually. Law sent in several helpful summaries 1034 # of the IATA's data after 1990. 1035 # 1036 # Except where otherwise noted, Shanks & Pottenger is the source for 1037 # entries through 1990, and IATA SSIM is the source for entries afterwards. 1038 # 1039 # Other sources occasionally used include: 1040 # 1041 # Edward W. Whitman, World Time Differences, 1042 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1043 # which I found in the UCLA library. 1044 # 1045 # <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 1046 # William Willett, The Waste of Daylight, 19th edition 1047 # </a> (1914-03) 1048 # 1049 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1050 # <http://www.jstor.org/stable/1774359>. 1051 # 1052 # See the 'europe' file for Greenland. 1053 1054 # Canada 1055 1056 # From Alain LaBont<e'> (1994-11-14): 1057 # I post here the time zone abbreviations standardized in Canada 1058 # for both English and French in the CAN/CSA-Z234.4-89 standard.... 1059 # 1060 # UTC Standard time Daylight savings time 1061 # offset French English French English 1062 # -2:30 - - HAT NDT 1063 # -3 - - HAA ADT 1064 # -3:30 HNT NST - - 1065 # -4 HNA AST HAE EDT 1066 # -5 HNE EST HAC CDT 1067 # -6 HNC CST HAR MDT 1068 # -7 HNR MST HAP PDT 1069 # -8 HNP PST HAY YDT 1070 # -9 HNY YST - - 1071 # 1072 # HN: Heure Normale ST: Standard Time 1073 # HA: Heure Avanc<e'>e DT: Daylight saving Time 1074 # 1075 # A: de l'Atlantique Atlantic 1076 # C: du Centre Central 1077 # E: de l'Est Eastern 1078 # M: Mountain 1079 # N: Newfoundland 1080 # P: du Pacifique Pacific 1081 # R: des Rocheuses 1082 # T: de Terre-Neuve 1083 # Y: du Yukon Yukon 1084 # 1085 # From Paul Eggert (1994-11-22): 1086 # Alas, this sort of thing must be handled by localization software. 1087 1088 # Unless otherwise specified, the data for Canada are all from Shanks 1089 # & Pottenger. 1090 1091 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1092 # 2007-03-01): 1093 # The British Columbia government announced yesterday that it will 1094 # adjust daylight savings next year to align with changes in the 1095 # U.S. and the rest of Canada.... 1096 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1097 # ... 1098 # Nova Scotia 1099 # Daylight saving time will be extended by four weeks starting in 2007.... 1100 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1101 # 1102 # [For New Brunswick] the new legislation dictates that the time change is to 1103 # be done at 02:00 instead of 00:01. 1104 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1105 # ... 1106 # Manitoba has traditionally changed the clock every fall at 03:00. 1107 # As of 2006, the transition is to take place one hour earlier at 02:00. 1108 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1109 # ... 1110 # [Alberta, Ontario, Quebec] will follow US rules. 1111 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1112 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1113 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1114 # ... 1115 # P.E.I. will follow US rules.... 1116 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1117 # ... 1118 # Province of Newfoundland and Labrador.... 1119 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1120 # ... 1121 # Yukon 1122 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1123 # ... 1124 # N.W.T. will follow US rules. Whoever maintains the government web site 1125 # does not seem to believe in bookmarks. To see the news release, click the 1126 # following link and search for "Daylight Savings Time Change". Press the 1127 # "Daylight Savings Time Change" link; it will fire off a popup using 1128 # JavaScript. 1129 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1130 # ... 1131 # Nunavut 1132 # An amendment to the Interpretation Act was registered on February 19/2007.... 1133 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1134 1135 # From Paul Eggert (2006-04-25): 1136 # H. David Matthews and Mary Vincent's map 1137 # <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 1138 # "It's about TIME", _Canadian Geographic_ (September-October 1998) 1139 # </a> contains detailed boundaries for regions observing nonstandard 1140 # time and daylight saving time arrangements in Canada circa 1998. 1141 # 1142 # INMS, the Institute for National Measurement Standards in Ottawa, has <a 1143 # href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 1144 # information about standard and daylight saving time zones in Canada. 1145 # </a> (updated periodically). 1146 # Its unofficial information is often taken from Matthews and Vincent. 1147 1148 # From Paul Eggert (2006-06-27): 1149 # For now, assume all of DST-observing Canada will fall into line with the 1150 # new US DST rules, 1151 1152 # From Chris Walton (2011-12-01) 1153 # In the first of Tammy Hardwick's articles 1154 # <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1155 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1156 # </a> 1157 # she quotes the Friday November 1/1918 edition of the Creston Review. 1158 # The quote includes these two statements: 1159 # 'Sunday the CPR went back to the old system of time...' 1160 # '... The daylight saving scheme was dropped all over Canada at the same time,' 1161 # These statements refer to a transition from daylight time to standard time 1162 # that occurred nationally on Sunday October 27/1918. This transition was 1163 # also documented in the Saturday October 26/1918 edition of the Toronto Star. 1164 1165 # In light of that evidence, we alter the date from the earlier believed 1166 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1167 # than Thursday) in all Canadian rulesets. 1168 1169 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1170 Rule Canada 1918 only - Apr 14 2:00 1:00 D 1171 Rule Canada 1918 only - Oct 27 2:00 0 S 1172 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1173 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1174 Rule Canada 1945 only - Sep 30 2:00 0 S 1175 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1176 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1177 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1178 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1179 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1180 1181 1182 # Newfoundland and Labrador 1183 1184 # From Paul Eggert (2000-10-02): 1185 # Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1186 # but the only part of Labrador that follows the rules is the 1187 # southeast corner, including Port Hope Simpson and Mary's Harbour, 1188 # but excluding, say, Black Tickle. 1189 1190 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1191 Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1192 Rule StJohns 1917 only - Sep 17 2:00 0 S 1193 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1194 Rule StJohns 1919 only - May 5 23:00 1:00 D 1195 Rule StJohns 1919 only - Aug 12 23:00 0 S 1196 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1197 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1198 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1199 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1200 # Pottenger. 1201 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1202 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1203 # Whitman gives the following transitions: 1204 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1205 # but go with Shanks & Pottenger and assume they used Canadian rules. 1206 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1207 # Apr 30 - Sep 24; go with Shanks & Pottenger. 1208 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1209 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1210 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1211 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1212 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1213 # From Paul Eggert (2000-10-02): 1214 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1215 # at 00:01 local time. For now, assume it started in 1987. 1216 1217 # From Michael Pelley (2011-09-12): 1218 # We received today, Monday, September 12, 2011, notification that the 1219 # changes to the Newfoundland Standard Time Act have been proclaimed. 1220 # The change in the Act stipulates that the change from Daylight Savings 1221 # Time to Standard Time and from Standard Time to Daylight Savings Time 1222 # now occurs at 2:00AM. 1223 # ... 1224 # <a href="http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm"> 1225 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1226 # </a> 1227 # ... 1228 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1229 # Office of the Chief Information Officer 1230 # Executive Council 1231 # Government of Newfoundland & Labrador 1232 1233 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1234 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1235 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1236 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1237 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1238 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1239 # 1240 # St John's has an apostrophe, but Posix file names can't have apostrophes. 1241 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1242 Zone America/St_Johns -3:30:52 - LMT 1884 1243 -3:30:52 StJohns N%sT 1918 1244 -3:30:52 Canada N%sT 1919 1245 -3:30:52 StJohns N%sT 1935 Mar 30 1246 -3:30 StJohns N%sT 1942 May 11 1247 -3:30 Canada N%sT 1946 1248 -3:30 StJohns N%sT 2011 Nov 1249 -3:30 Canada N%sT 1250 1251 # most of east Labrador 1252 1253 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1254 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1255 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1256 -3:30:52 - NST 1918 1257 -3:30:52 Canada N%sT 1919 1258 -3:30:52 - NST 1935 Mar 30 1259 -3:30 - NST 1936 1260 -3:30 StJohns N%sT 1942 May 11 1261 -3:30 Canada N%sT 1946 1262 -3:30 StJohns N%sT 1966 Mar 15 2:00 1263 -4:00 StJohns A%sT 2011 Nov 1264 -4:00 Canada A%sT 1265 1266 1267 # west Labrador, Nova Scotia, Prince Edward I 1268 1269 # From Paul Eggert (2006-03-22): 1270 # Shanks & Pottenger write that since 1970 most of this region has been like 1271 # Halifax. Many locales did not observe peacetime DST until 1972; 1272 # Glace Bay, NS is the largest that we know of. 1273 # Shanks & Pottenger also write that Liverpool, NS was the only town 1274 # in Canada to observe DST in 1971 but not 1970; for now we'll assume 1275 # this is a typo. 1276 1277 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1278 Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1279 Rule Halifax 1916 only - Oct 1 0:00 0 S 1280 Rule Halifax 1920 only - May 9 0:00 1:00 D 1281 Rule Halifax 1920 only - Aug 29 0:00 0 S 1282 Rule Halifax 1921 only - May 6 0:00 1:00 D 1283 Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1284 Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1285 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1286 Rule Halifax 1923 only - Sep 4 0:00 0 S 1287 Rule Halifax 1924 only - Sep 15 0:00 0 S 1288 Rule Halifax 1925 only - Sep 28 0:00 0 S 1289 Rule Halifax 1926 only - May 16 0:00 1:00 D 1290 Rule Halifax 1926 only - Sep 13 0:00 0 S 1291 Rule Halifax 1927 only - May 1 0:00 1:00 D 1292 Rule Halifax 1927 only - Sep 26 0:00 0 S 1293 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1294 Rule Halifax 1928 only - Sep 9 0:00 0 S 1295 Rule Halifax 1929 only - Sep 3 0:00 0 S 1296 Rule Halifax 1930 only - Sep 15 0:00 0 S 1297 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1298 Rule Halifax 1932 only - May 1 0:00 1:00 D 1299 Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1300 Rule Halifax 1933 only - Oct 2 0:00 0 S 1301 Rule Halifax 1934 only - May 20 0:00 1:00 D 1302 Rule Halifax 1934 only - Sep 16 0:00 0 S 1303 Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1304 Rule Halifax 1935 only - Sep 30 0:00 0 S 1305 Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1306 Rule Halifax 1936 only - Sep 14 0:00 0 S 1307 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1308 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1309 Rule Halifax 1939 only - May 28 0:00 1:00 D 1310 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1311 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1312 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1313 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1314 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1315 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1316 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1317 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1318 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1319 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1320 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1321 -4:00 Halifax A%sT 1918 1322 -4:00 Canada A%sT 1919 1323 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1324 -4:00 Canada A%sT 1946 1325 -4:00 Halifax A%sT 1974 1326 -4:00 Canada A%sT 1327 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1328 -4:00 Canada A%sT 1953 1329 -4:00 Halifax A%sT 1954 1330 -4:00 - AST 1972 1331 -4:00 Halifax A%sT 1974 1332 -4:00 Canada A%sT 1333 1334 # New Brunswick 1335 1336 # From Paul Eggert (2007-01-31): 1337 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1338 # says they changed at 00:01 through 2006, and 1339 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1340 # clear that this was the case since at least 1993. 1341 # For now, assume it started in 1993. 1342 1343 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1344 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1345 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1346 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1347 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1348 Rule Moncton 1939 only - May 27 1:00 1:00 D 1349 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1350 Rule Moncton 1940 only - May 19 1:00 1:00 D 1351 Rule Moncton 1941 only - May 4 1:00 1:00 D 1352 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1353 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1354 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1355 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1356 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1357 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1358 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1359 -5:00 - EST 1902 Jun 15 1360 -4:00 Canada A%sT 1933 1361 -4:00 Moncton A%sT 1942 1362 -4:00 Canada A%sT 1946 1363 -4:00 Moncton A%sT 1973 1364 -4:00 Canada A%sT 1993 1365 -4:00 Moncton A%sT 2007 1366 -4:00 Canada A%sT 1367 1368 # Quebec 1369 1370 # From Paul Eggert (2013-08-30): 1371 # Since 1970 most of Quebec has been like Toronto. 1372 # However, because earlier versions of the tz database mistakenly relied on data 1373 # from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, 1374 # a separate entry was created for most of Quebec. We're loath to lose 1375 # its pre-1970 info, even though the tz database is normally limited to 1376 # zones that differ after 1970, so keep this otherwise out-of-scope entry. 1377 1378 # Matthews and Vincent (1998) also write that Quebec east of the -63 1379 # meridian is supposed to observe AST, but residents as far east as 1380 # Natashquan use EST/EDT, and residents east of Natashquan use AST. 1381 # The Quebec department of justice writes in 1382 # "The situation in Minganie and Basse-Cote-Nord" 1383 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1384 # that the coastal strip from just east of Natashquan to Blanc-Sablon 1385 # observes Atlantic standard time all year round. 1386 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1387 # says this common practice was codified into law as of 2007. 1388 # For lack of better info, guess this practice began around 1970, contra to 1389 # Shanks & Pottenger who have this region observing AST/ADT. 1390 # for post-1970 data America/Puerto_Rico. 1391 1392 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1393 Rule Mont 1917 only - Mar 25 2:00 1:00 D 1394 Rule Mont 1917 only - Apr 24 0:00 0 S 1395 Rule Mont 1919 only - Mar 31 2:30 1:00 D 1396 Rule Mont 1919 only - Oct 25 2:30 0 S 1397 Rule Mont 1920 only - May 2 2:30 1:00 D 1398 Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1399 Rule Mont 1921 only - May 1 2:00 1:00 D 1400 Rule Mont 1922 only - Apr 30 2:00 1:00 D 1401 Rule Mont 1924 only - May 17 2:00 1:00 D 1402 Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1403 Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1404 # The 1927-to-1937 rules can be expressed more simply as 1405 # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1406 # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1407 # The rules below avoid use of 24:00 1408 # (which pre-1998 versions of zic cannot handle). 1409 Rule Mont 1927 only - May 1 0:00 1:00 D 1410 Rule Mont 1927 1932 - Sep lastSun 0:00 0 S 1411 Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1412 Rule Mont 1932 only - May 1 0:00 1:00 D 1413 Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1414 Rule Mont 1933 only - Oct 1 0:00 0 S 1415 Rule Mont 1934 1939 - Sep lastSun 0:00 0 S 1416 Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1417 Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1418 Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1419 Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1420 Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1421 1422 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1423 Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1424 -4:00 Canada A%sT 1970 1425 -4:00 - AST 1426 Zone America/Montreal -4:54:16 - LMT 1884 1427 -5:00 Mont E%sT 1918 1428 -5:00 Canada E%sT 1919 1429 -5:00 Mont E%sT 1942 Feb 9 2:00s 1430 -5:00 Canada E%sT 1946 1431 -5:00 Mont E%sT 1974 1432 -5:00 Canada E%sT 1433 1434 # Ontario 1435 1436 # From Paul Eggert (2006-07-09): 1437 # Shanks & Pottenger write that since 1970 most of Ontario has been like 1438 # Toronto. 1439 # Thunder Bay skipped DST in 1973. 1440 # Many smaller locales did not observe peacetime DST until 1974; 1441 # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1442 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1443 1444 # From Mark Brader (2003-07-26): 1445 # [According to the Toronto Star] Orillia, Ontario, adopted DST 1446 # effective Saturday, 1912-06-22, 22:00; the article mentions that 1447 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1448 # have already done so. In Orillia DST was to run until Saturday, 1449 # 1912-08-31 (no time mentioned), but it was met with considerable 1450 # hostility from certain segments of the public, and was revoked after 1451 # only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1452 # presumably that should be -07-06. (1912-06-19, -07-12; also letters 1453 # earlier in June). 1454 # 1455 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1456 1457 # From Paul Eggert (1997-10-17): 1458 # Mark Brader writes that an article in the 1997-10-14 Toronto Star 1459 # says that Atikokan, Ontario currently does not observe DST, 1460 # but will vote on 11-10 whether to use EST/EDT. 1461 # He also writes that the 1462 # <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 1463 # Ontario Time Act (1990, Chapter T.9) 1464 # </a> 1465 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1466 # Officially Atikokan is therefore on CST/CDT, and most likely this report 1467 # concerns a non-official time observed as a matter of local practice. 1468 # 1469 # From Paul Eggert (2000-10-02): 1470 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1471 # New Osnaburgh observe CST all year, that Big Trout Lake observes 1472 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1473 # violation of the official Ontario rules. 1474 # 1475 # From Paul Eggert (2006-07-09): 1476 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1477 # 2005-07-21 Chronicle-Journal, which said: 1478 # 1479 # The clocks in Atikokan stay set on standard time year-round. 1480 # This means they spend about half the time on central time and 1481 # the other half on eastern time. 1482 # 1483 # For the most part, the system works, Mayor Dennis Brown said. 1484 # 1485 # "The majority of businesses in Atikokan deal more with Eastern 1486 # Canada, but there are some that deal with Western Canada," he 1487 # said. "I don't see any changes happening here." 1488 # 1489 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1490 # [New Osnaburgh] follow the same practice." 1491 1492 # From Garry McKinnon (2006-07-14) via Chris Walton: 1493 # I chatted with a member of my board who has an outstanding memory 1494 # and a long history in Atikokan (and in the telecom industry) and he 1495 # can say for certain that Atikokan has been practicing the current 1496 # time keeping since 1952, at least. 1497 1498 # From Paul Eggert (2006-07-17): 1499 # Shanks & Pottenger say that Atikokan has agreed with Rainy River 1500 # ever since standard time was introduced, but the information from 1501 # McKinnon sounds more authoritative. For now, assume that Atikokan 1502 # switched to EST immediately after WWII era daylight saving time 1503 # ended. This matches the old (less-populous) America/Coral_Harbour 1504 # entry since our cutoff date of 1970, so we can move 1505 # America/Coral_Harbour to the 'backward' file. 1506 1507 # From Mark Brader (2010-03-06): 1508 # 1509 # Currently the database has: 1510 # 1511 # # Ontario 1512 # 1513 # # From Paul Eggert (2006-07-09): 1514 # # Shanks & Pottenger write that since 1970 most of Ontario has been like 1515 # # Toronto. 1516 # # Thunder Bay skipped DST in 1973. 1517 # # Many smaller locales did not observe peacetime DST until 1974; 1518 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1519 # 1520 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1521 # right corner of page 1, it says that Toronto will return to standard 1522 # time at 2 am Sunday morning (which agrees with the database), and that: 1523 # 1524 # The one-hour setback will go into effect throughout most of Ontario, 1525 # except in areas like Windsor which remains on standard time all year. 1526 # 1527 # Windsor is, of course, a lot larger than Nipigon. 1528 # 1529 # I only came across this incidentally. I don't know if Windsor began 1530 # observing DST when Detroit did, or in 1974, or on some other date. 1531 # 1532 # By the way, the article continues by noting that: 1533 # 1534 # Some cities in the United States have pushed the deadline back 1535 # three weeks and will change over from daylight saving in October. 1536 1537 # From Arthur David Olson (2010-07-17): 1538 # 1539 # "Standard Time and Time Zones in Canada" appeared in 1540 # The Journal of The Royal Astronomical Society of Canada, 1541 # volume 26, number 2 (February 1932) and, as of 2010-07-17, 1542 # was available at 1543 # <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1544 # http://adsabs.harvard.edu/full/1932JRASC..26...49S 1545 # </a> 1546 # 1547 # It includes the text below (starting on page 57): 1548 # 1549 # A list of the places in Canada using daylight saving time would 1550 # require yearly revision. From information kindly furnished by 1551 # the provincial governments and by the postmasters in many cities 1552 # and towns, it is found that the following places used daylight sav- 1553 # ing in 1930. The information for the province of Quebec is definite, 1554 # for the other provinces only approximate: 1555 # 1556 # Province Daylight saving time used 1557 # Prince Edward Island Not used. 1558 # Nova Scotia In Halifax only. 1559 # New Brunswick In St. John only. 1560 # Quebec In the following places: 1561 # Montreal Lachine 1562 # Quebec Mont-Royal 1563 # Levis Iberville 1564 # St. Lambert Cap de la Madeleine 1565 # Verdun Loretteville 1566 # Westmount Richmond 1567 # Outremont St. Jerome 1568 # Longueuil Greenfield Park 1569 # Arvida Waterloo 1570 # Chambly-Canton Beaulieu 1571 # Melbourne La Tuque 1572 # St. Theophile Buckingham 1573 # Ontario Used generally in the cities and towns along 1574 # the southerly part of the province. Not 1575 # used in the northwesterlhy part. 1576 # Manitoba Not used. 1577 # Saskatchewan In Regina only. 1578 # Alberta Not used. 1579 # British Columbia Not used. 1580 # 1581 # With some exceptions, the use of daylight saving may be said to be limited 1582 # to those cities and towns lying between Quebec city and Windsor, Ont. 1583 1584 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1585 Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1586 Rule Toronto 1919 only - Oct 26 0:00 0 S 1587 Rule Toronto 1920 only - May 2 2:00 1:00 D 1588 Rule Toronto 1920 only - Sep 26 0:00 0 S 1589 Rule Toronto 1921 only - May 15 2:00 1:00 D 1590 Rule Toronto 1921 only - Sep 15 2:00 0 S 1591 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1592 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1593 # was meant. 1594 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1595 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1596 # The 1927-to-1939 rules can be expressed more simply as 1597 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1598 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1599 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1600 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1601 # The rules below avoid use of Sun>=25 1602 # (which pre-2004 versions of zic cannot handle). 1603 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1604 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1605 Rule Toronto 1932 only - May 1 2:00 1:00 D 1606 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1607 Rule Toronto 1933 only - Oct 1 2:00 0 S 1608 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1609 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1610 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1611 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1612 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1613 Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1614 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1615 Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1616 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1617 # Shanks & Pottenger say Toronto ended DST a week early in 1971, 1618 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1619 # is wrong, and that he had confirmed it by checking the 1971-10-30 1620 # Toronto Star, which said that DST was ending 1971-10-31 as usual. 1621 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1622 1623 # From Paul Eggert (2003-07-27): 1624 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1625 # Port Arthur, Ontario, the principle of the Bill has been in 1626 # operation for the past three years, and in the City of Moose Jaw, 1627 # Saskatchewan, for one year." 1628 1629 # From David Bryan via Tory Tronrud, Director/Curator, 1630 # Thunder Bay Museum (2003-11-12): 1631 # There is some suggestion, however, that, by-law or not, daylight 1632 # savings time was being practiced in Fort William and Port Arthur 1633 # before 1909.... [I]n 1910, the line between the Eastern and Central 1634 # Time Zones was permanently moved about two hundred miles west to 1635 # include the Thunder Bay area.... When Canada adopted daylight 1636 # savings time in 1916, Fort William and Port Arthur, having done so 1637 # already, did not change their clocks.... During the Second World 1638 # War,... [t]he cities agreed to implement DST during the summer 1639 # months for the remainder of the war years. 1640 1641 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1642 Zone America/Toronto -5:17:32 - LMT 1895 1643 -5:00 Canada E%sT 1919 1644 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1645 -5:00 Canada E%sT 1946 1646 -5:00 Toronto E%sT 1974 1647 -5:00 Canada E%sT 1648 Zone America/Thunder_Bay -5:57:00 - LMT 1895 1649 -6:00 - CST 1910 1650 -5:00 - EST 1942 1651 -5:00 Canada E%sT 1970 1652 -5:00 Toronto E%sT 1973 1653 -5:00 - EST 1974 1654 -5:00 Canada E%sT 1655 Zone America/Nipigon -5:53:04 - LMT 1895 1656 -5:00 Canada E%sT 1940 Sep 29 1657 -5:00 1:00 EDT 1942 Feb 9 2:00s 1658 -5:00 Canada E%sT 1659 Zone America/Rainy_River -6:18:16 - LMT 1895 1660 -6:00 Canada C%sT 1940 Sep 29 1661 -6:00 1:00 CDT 1942 Feb 9 2:00s 1662 -6:00 Canada C%sT 1663 Zone America/Atikokan -6:06:28 - LMT 1895 1664 -6:00 Canada C%sT 1940 Sep 29 1665 -6:00 1:00 CDT 1942 Feb 9 2:00s 1666 -6:00 Canada C%sT 1945 Sep 30 2:00 1667 -5:00 - EST 1668 1669 1670 # Manitoba 1671 1672 # From Rob Douglas (2006-04-06): 1673 # the old Manitoba Time Act - as amended by Bill 2, assented to 1674 # March 27, 1987 ... said ... 1675 # "between two o'clock Central Standard Time in the morning of 1676 # the first Sunday of April of each year and two o'clock Central 1677 # Standard Time in the morning of the last Sunday of October next 1678 # following, one hour in advance of Central Standard Time."... 1679 # I believe that the English legislation [of the old time act] had = 1680 # been assented to (March 22, 1967).... 1681 # Also, as far as I can tell, there was no order-in-council varying 1682 # the time of Daylight Saving Time for 2005 and so the provisions of 1683 # the 1987 version would apply - the changeover was at 2:00 Central 1684 # Standard Time (i.e. not until 3:00 Central Daylight Time). 1685 1686 # From Paul Eggert (2006-04-10): 1687 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1688 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1689 # it was also 02:00s in 1966. 1690 1691 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1692 Rule Winn 1916 only - Apr 23 0:00 1:00 D 1693 Rule Winn 1916 only - Sep 17 0:00 0 S 1694 Rule Winn 1918 only - Apr 14 2:00 1:00 D 1695 Rule Winn 1918 only - Oct 27 2:00 0 S 1696 Rule Winn 1937 only - May 16 2:00 1:00 D 1697 Rule Winn 1937 only - Sep 26 2:00 0 S 1698 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1699 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1700 Rule Winn 1945 only - Sep lastSun 2:00 0 S 1701 Rule Winn 1946 only - May 12 2:00 1:00 D 1702 Rule Winn 1946 only - Oct 13 2:00 0 S 1703 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1704 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1705 Rule Winn 1950 only - May 1 2:00 1:00 D 1706 Rule Winn 1950 only - Sep 30 2:00 0 S 1707 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1708 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1709 Rule Winn 1959 only - Oct lastSun 2:00 0 S 1710 Rule Winn 1960 only - Sep lastSun 2:00 0 S 1711 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1712 Rule Winn 1963 only - Sep 22 2:00 0 S 1713 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1714 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1715 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1716 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1717 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1718 -6:00 Winn C%sT 2006 1719 -6:00 Canada C%sT 1720 1721 1722 # Saskatchewan 1723 1724 # From Mark Brader (2003-07-26): 1725 # The first actual adoption of DST in Canada was at the municipal 1726 # level. As the [Toronto] Star put it (1912-06-07), "While people 1727 # elsewhere have long been talking of legislation to save daylight, 1728 # the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1729 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1730 # presumably late evening, as below), and would run until "the end of 1731 # the summer". The discrepancy between municipal time and railroad 1732 # time was noted. 1733 1734 # From Paul Eggert (2003-07-27): 1735 # Willett (1914-03) notes that DST "has been in operation ... in the 1736 # City of Moose Jaw, Saskatchewan, for one year." 1737 1738 # From Paul Eggert (2006-03-22): 1739 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1740 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1741 # Other western towns (e.g. Lloydminster) are like Edmonton. 1742 # Matthews and Vincent (1998) write that Denare Beach and Creighton 1743 # are like Winnipeg, in violation of Saskatchewan law. 1744 1745 # From W. Jones (1992-11-06): 1746 # The. . .below is based on information I got from our law library, the 1747 # provincial archives, and the provincial Community Services department. 1748 # A precise history would require digging through newspaper archives, and 1749 # since you didn't say what you wanted, I didn't bother. 1750 # 1751 # Saskatchewan is split by a time zone meridian (105W) and over the years 1752 # the boundary became pretty ragged as communities near it reevaluated 1753 # their affiliations in one direction or the other. In 1965 a provincial 1754 # referendum favoured legislating common time practices. 1755 # 1756 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1757 # Saskatchewan 1978) was proclaimed, and established that the eastern 1758 # part of Saskatchewan would use CST year round, that districts in 1759 # northwest Saskatchewan would by default follow CST but could opt to 1760 # follow Mountain Time rules (thus 1 hour difference in the winter and 1761 # zero in the summer), and that districts in southwest Saskatchewan would 1762 # by default follow MT but could opt to follow CST. 1763 # 1764 # It took a few years for the dust to settle (I know one story of a town 1765 # on one time zone having its school in another, such that a mom had to 1766 # serve her family lunch in two shifts), but presently it seems that only 1767 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1768 # rules any more; all other districts appear to have used CST year round 1769 # since sometime in the 1960s. 1770 1771 # From Chris Walton (2006-06-26): 1772 # The Saskatchewan time act which was last updated in 1996 is about 30 pages 1773 # long and rather painful to read. 1774 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1775 1776 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1777 Rule Regina 1918 only - Apr 14 2:00 1:00 D 1778 Rule Regina 1918 only - Oct 27 2:00 0 S 1779 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1780 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1781 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1782 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1783 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1784 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1785 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1786 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1787 Rule Regina 1945 only - Sep lastSun 2:00 0 S 1788 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1789 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1790 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1791 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1792 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1793 Rule Regina 1959 only - Oct lastSun 2:00 0 S 1794 # 1795 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1796 Rule Swift 1957 only - Oct lastSun 2:00 0 S 1797 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1798 Rule Swift 1959 only - Oct lastSun 2:00 0 S 1799 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1800 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1801 Zone America/Regina -6:58:36 - LMT 1905 Sep 1802 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1803 -6:00 - CST 1804 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1805 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1806 -7:00 Regina M%sT 1950 1807 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1808 -6:00 - CST 1809 1810 1811 # Alberta 1812 1813 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1814 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1815 Rule Edm 1918 only - Oct 27 2:00 0 S 1816 Rule Edm 1919 only - May 27 2:00 0 S 1817 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1818 Rule Edm 1920 only - Oct lastSun 2:00 0 S 1819 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1820 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1821 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1822 Rule Edm 1945 only - Sep lastSun 2:00 0 S 1823 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1824 Rule Edm 1947 only - Sep lastSun 2:00 0 S 1825 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1826 Rule Edm 1967 only - Oct lastSun 2:00 0 S 1827 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1828 Rule Edm 1969 only - Oct lastSun 2:00 0 S 1829 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1830 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1831 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1832 Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1833 -7:00 Edm M%sT 1987 1834 -7:00 Canada M%sT 1835 1836 1837 # British Columbia 1838 1839 # From Paul Eggert (2006-03-22): 1840 # Shanks & Pottenger write that since 1970 most of this region has 1841 # been like Vancouver. 1842 # Dawson Creek uses MST. Much of east BC is like Edmonton. 1843 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1844 1845 # It seems though that (re: Creston) is not entirely correct: 1846 1847 # From Chris Walton (2011-12-01): 1848 # There are two areas within the Canadian province of British Columbia 1849 # that do not currently observe daylight saving: 1850 # a) The Creston Valley (includes the town of Creston and surrounding area) 1851 # b) The eastern half of the Peace River Regional District 1852 # (includes the cities of Dawson Creek and Fort St. John) 1853 1854 # Earlier this year I stumbled across a detailed article about the time 1855 # keeping history of Creston; it was written by Tammy Hardwick who is the 1856 # manager of the Creston & District Museum. The article was written in May 2009. 1857 # <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1858 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1859 # </a> 1860 # According to the article, Creston has not changed its clocks since June 1918. 1861 # i.e. Creston has been stuck on UTC-7 for 93 years. 1862 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1863 1864 # Unfortunately the exact date for the time change in June 1918 remains 1865 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1866 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1867 # as plausible as any other date (in June). She also said that after writing the 1868 # article she had discovered another time change in 1916; this is the subject 1869 # of another article which she wrote in October 2010. 1870 # <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56"> 1871 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1872 # </a> 1873 1874 # Here is a summary of the three clock change events in Creston's history: 1875 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1876 # Exact date unknown 1877 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1878 # Exact date in October unknown; Sunday October 1 is a reasonable guess. 1879 # 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1880 # Exact date in June unknown; Sunday June 2 is a reasonable guess. 1881 # note#1: 1882 # On Oct 27/1918 when daylight saving ended in the rest of Canada, 1883 # Creston did not change its clocks. 1884 # note#2: 1885 # During WWII when the Federal Government legislated a mandatory clock change, 1886 # Creston did not oblige. 1887 # note#3: 1888 # There is no guarantee that Creston will remain on Mountain Standard Time 1889 # (UTC-7) forever. 1890 # The subject was debated at least once this year by the town Council. 1891 # <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html"> 1892 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1893 # </a> 1894 1895 # During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1896 # In Creston, that was handled by shifting the area to PST (-8:00) then applying 1897 # summer time to cause the offset to be -7:00, the same as it had been before 1898 # the change. It can be argued that the timezone abbreviation during this 1899 # period should be PDT rather than MST, but that doesn't seem important enough 1900 # (to anyone) to further complicate the rules. 1901 1902 # The transition dates (and times) are guesses. 1903 1904 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1905 Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1906 Rule Vanc 1918 only - Oct 27 2:00 0 S 1907 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1908 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1909 Rule Vanc 1945 only - Sep 30 2:00 0 S 1910 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1911 Rule Vanc 1946 only - Oct 13 2:00 0 S 1912 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1913 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1914 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1915 Zone America/Vancouver -8:12:28 - LMT 1884 1916 -8:00 Vanc P%sT 1987 1917 -8:00 Canada P%sT 1918 Zone America/Dawson_Creek -8:00:56 - LMT 1884 1919 -8:00 Canada P%sT 1947 1920 -8:00 Vanc P%sT 1972 Aug 30 2:00 1921 -7:00 - MST 1922 Zone America/Creston -7:46:04 - LMT 1884 1923 -7:00 - MST 1916 Oct 1 1924 -8:00 - PST 1918 Jun 2 1925 -7:00 - MST 1926 1927 # Northwest Territories, Nunavut, Yukon 1928 1929 # From Paul Eggert (2006-03-22): 1930 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1931 # Mathew Englander (1996-10-07) gives the following refs: 1932 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1933 # c. 7 defines Yukon standard time as UTC-9. This is still valid; 1934 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1935 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1936 # * O.I.C. 1980/02 established DST. 1937 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1938 # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1939 # with Englander. 1940 # From Chris Walton (2006-06-26): 1941 # Here is a link to the old daylight saving portion of the interpretation 1942 # act which was last updated in 1987: 1943 # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1944 1945 # From Rives McDow (1999-09-04): 1946 # Nunavut ... moved ... to incorporate the whole territory into one time zone. 1947 # <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 1948 # Nunavut moves to single time zone Oct. 31 1949 # </a> 1950 # 1951 # From Antoine Leca (1999-09-06): 1952 # We then need to create a new timezone for the Kitikmeot region of Nunavut 1953 # to differentiate it from the Yellowknife region. 1954 1955 # From Paul Eggert (1999-09-20): 1956 # <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 1957 # Basic Facts: The New Territory 1958 # </a> (1999) reports that Pangnirtung operates on eastern time, 1959 # and that Coral Harbour does not observe DST. We don't know when 1960 # Pangnirtung switched to eastern time; we'll guess 1995. 1961 1962 # From Rives McDow (1999-11-08): 1963 # On October 31, when the rest of Nunavut went to Central time, 1964 # Pangnirtung wobbled. Here is the result of their wobble: 1965 # 1966 # The following businesses and organizations in Pangnirtung use Central Time: 1967 # 1968 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1969 # Eastern Arctic National Parks, A & D Specialist 1970 # 1971 # The following businesses and organizations in Pangnirtung use Eastern Time: 1972 # 1973 # Hamlet office, All other businesses, Both schools, Airport operator 1974 # 1975 # This has made for an interesting situation there, which warranted the news. 1976 # No one there that I spoke with seems concerned, or has plans to 1977 # change the local methods of keeping time, as it evidently does not 1978 # really interfere with any activities or make things difficult locally. 1979 # They plan to celebrate New Year's turn-over twice, one hour apart, 1980 # so it appears that the situation will last at least that long. 1981 # The Nunavut Intergovernmental Affairs hopes that they will "come to 1982 # their senses", but the locals evidently don't see any problem with 1983 # the current state of affairs. 1984 1985 # From Michaela Rodrigue, writing in the 1986 # <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 1987 # Nunatsiaq News (1999-11-19)</a>: 1988 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1989 # central - or Nunavut time - for government offices, and eastern time 1990 # for municipal offices and schools.... Igloolik [was similar but then] 1991 # made the switch to central time on Saturday, Nov. 6. 1992 1993 # From Paul Eggert (2000-10-02): 1994 # Matthews and Vincent (1998) say the following, but we lack histories 1995 # for these potential new Zones. 1996 # 1997 # The Canadian Forces station at Alert uses Eastern Time while the 1998 # handful of residents at the Eureka weather station [in the Central 1999 # zone] skip daylight savings. Baffin Island, which is crossed by the 2000 # Central, Eastern and Atlantic Time zones only uses Eastern Time. 2001 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2002 # Central Time and Southampton Island [in the Central zone] is not 2003 # required to use daylight savings. 2004 2005 # From 2006 # <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 2007 # Nunavut now has two time zones 2008 # </a> (2000-11-10): 2009 # The Nunavut government would allow its employees in Kugluktuk and 2010 # Cambridge Bay to operate on central time year-round, putting them 2011 # one hour behind the rest of Nunavut for six months during the winter. 2012 # At the end of October the two communities had rebelled against 2013 # Nunavut's unified time zone, refusing to shift to eastern time with 2014 # the rest of the territory for the winter. Cambridge Bay remained on 2015 # central time, while Kugluktuk, even farther west, reverted to 2016 # mountain time, which they had used before the advent of Nunavut's 2017 # unified time zone in 1999. 2018 # 2019 # From Rives McDow (2001-01-20), quoting the Nunavut government: 2020 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2021 2022 # From Paul Eggert (2000-12-04): 2023 # Let's just keep track of the official times for now. 2024 2025 # From Rives McDow (2001-03-07): 2026 # The premier of Nunavut has issued a ministerial statement advising 2027 # that effective 2001-04-01, the territory of Nunavut will revert 2028 # back to three time zones (mountain, central, and eastern). Of the 2029 # cities in Nunavut, Coral Harbor is the only one that I know of that 2030 # has said it will not observe dst, staying on EST year round. I'm 2031 # checking for more info, and will get back to you if I come up with 2032 # more. 2033 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2034 2035 # From Gwillim Law (2005-05-21): 2036 # According to maps at 2037 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 2038 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 2039 # (both dated 2003), and 2040 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2041 # (from a 1998 Canadian Geographic article), the de facto and de jure time 2042 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2043 # round. Using Google, it's easy to find other websites that confirm this. 2044 # I wasn't able to find how far back this time regimen goes, but since it 2045 # predates the creation of Nunavut, it probably goes back many years.... 2046 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2047 # 2048 # From Paul Eggert (2005-07-26): 2049 # For lack of better information, assume that Southampton Island observed 2050 # daylight saving only during wartime. 2051 2052 # From Chris Walton (2007-03-01): 2053 # ... the community of Resolute (located on Cornwallis Island in 2054 # Nunavut) moved from Central Time to Eastern Time last November. 2055 # Basically the community did not change its clocks at the end of 2056 # daylight saving.... 2057 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2058 2059 # From Chris Walton (2011-03-21): 2060 # Back in 2007 I initiated the creation of a new "zone file" for Resolute 2061 # Bay. Resolute Bay is a small community located about 900km north of 2062 # the Arctic Circle. The zone file was required because Resolute Bay had 2063 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2064 # 2065 # According to new information which I received last week, Resolute Bay 2066 # went back to using UTC-6 in the winter of 2007-2008... 2067 # 2068 # On March 11/2007 most of Canada went onto daylight saving. On March 2069 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2070 # talked to somebody that was both knowledgeable and helpful. I was able 2071 # to confirm that Resolute Bay was still operating on UTC-5. It was 2072 # explained to me that Resolute Bay had been on the Eastern Time zone 2073 # (EST) in the winter, and was now back on the Central Time zone (CDT). 2074 # i.e. the time zone had changed twice in the last year but the clocks 2075 # had not moved. The residents had to know which time zone they were in 2076 # so they could follow the correct TV schedule... 2077 # 2078 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2079 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2080 # of the phone call, I decided to seek out an alternate source of 2081 # information. I found an e-mail address for somebody by the name of 2082 # Stephanie Adams whose job was listed as "Inns North Support Officer for 2083 # Arctic Co-operatives." I was under the impression that Stephanie lived 2084 # and worked in Resolute Bay... 2085 # 2086 # On March 14/2011 I phoned the hamlet office again. I was told that 2087 # Resolute Bay had been using Central Standard Time over the winter of 2088 # 2010-2011 and that the clocks had therefore been moved one hour ahead 2089 # on March 13/2011. The person I talked to was aware that Resolute Bay 2090 # had previously experimented with Eastern Standard Time but he could not 2091 # tell me when the practice had stopped. 2092 # 2093 # On March 17/2011 I searched the Web to find an e-mail address of 2094 # somebody that might be able to tell me exactly when Resolute Bay went 2095 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2096 # used to be the mayor of Resolute Bay and he apparently owns half the 2097 # businesses including "South Camp Inn." This website has some info on 2098 # Aziz: 2099 # <a href="http://www.uphere.ca/node/493"> 2100 # http://www.uphere.ca/node/493 2101 # </a> 2102 # 2103 # I sent Aziz an e-mail asking when Resolute Bay had stopped using 2104 # Eastern Standard Time. 2105 # 2106 # Aziz responded quickly with this: "hi, The time was not changed for the 2107 # 1 year only, the following year, the community went back to the old way 2108 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2109 # the winter Zulu plus 6 hrs" 2110 # 2111 # This of course conflicted with everything I had ascertained in November 2008. 2112 # 2113 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2114 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2115 # may want to check with the weather office in Resolute Bay or do a 2116 # search on the weather through Env. Canada. web site" 2117 # 2118 # If I had realized the Stephanie did not live in Resolute Bay I would 2119 # never have contacted her. I now believe that all the information I 2120 # obtained in November 2008 should be ignored... 2121 # I apologize for reporting incorrect information in 2008. 2122 2123 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2124 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2125 Rule NT_YK 1918 only - Oct 27 2:00 0 S 2126 Rule NT_YK 1919 only - May 25 2:00 1:00 D 2127 Rule NT_YK 1919 only - Nov 1 0:00 0 S 2128 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2129 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2130 Rule NT_YK 1945 only - Sep 30 2:00 0 S 2131 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2132 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2133 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2134 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2135 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2136 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2137 # aka Panniqtuuq 2138 Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 2139 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2140 -5:00 Canada E%sT 1999 Oct 31 2:00 2141 -6:00 Canada C%sT 2000 Oct 29 2:00 2142 -5:00 Canada E%sT 2143 # formerly Frobisher Bay 2144 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2145 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2146 -6:00 Canada C%sT 2000 Oct 29 2:00 2147 -5:00 Canada E%sT 2148 # aka Qausuittuq 2149 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2150 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2151 -5:00 - EST 2001 Apr 1 3:00 2152 -6:00 Canada C%sT 2006 Oct 29 2:00 2153 -5:00 - EST 2007 Mar 11 3:00 2154 -6:00 Canada C%sT 2155 # aka Kangiqiniq 2156 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2157 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2158 -5:00 - EST 2001 Apr 1 3:00 2159 -6:00 Canada C%sT 2160 # aka Iqaluktuuttiaq 2161 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2162 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2163 -6:00 Canada C%sT 2000 Oct 29 2:00 2164 -5:00 - EST 2000 Nov 5 0:00 2165 -6:00 - CST 2001 Apr 1 3:00 2166 -7:00 Canada M%sT 2167 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2168 -7:00 NT_YK M%sT 1980 2169 -7:00 Canada M%sT 2170 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 2171 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2172 -7:00 NT_YK M%sT 1980 2173 -7:00 Canada M%sT 2174 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2175 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2176 -8:00 NT_YK P%sT 1980 2177 -8:00 Canada P%sT 2178 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2179 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2180 -8:00 NT_YK P%sT 1980 2181 -8:00 Canada P%sT 2182 2183 2184 ############################################################################### 2185 2186 # Mexico 2187 2188 # From Paul Eggert (2001-03-05): 2189 # The Investigation and Analysis Service of the 2190 # Mexican Library of Congress (MLoC) has published a 2191 # <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 2192 # history of Mexican local time (in Spanish) 2193 # </a>. 2194 # 2195 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2196 # (In all cases we go with the MLoC.) 2197 # S&P report that Baja was at -8:00 in 1922/1923. 2198 # S&P say the 1930 transition in Baja was 1930-11-16. 2199 # S&P report no DST during summer 1931. 2200 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2201 2202 # From Gwillim Law (2001-02-20): 2203 # There are some other discrepancies between the Decrees page and the 2204 # tz database. I think they can best be explained by supposing that 2205 # the researchers who prepared the Decrees page failed to find some of 2206 # the relevant documents. 2207 2208 # From Alan Perry (1996-02-15): 2209 # A guy from our Mexico subsidiary finally found the Presidential Decree 2210 # outlining the timezone changes in Mexico. 2211 # 2212 # ------------- Begin Forwarded Message ------------- 2213 # 2214 # I finally got my hands on the Official Presidential Decree that sets up the 2215 # rules for the DST changes. The rules are: 2216 # 2217 # 1. The country is divided in 3 timezones: 2218 # - Baja California Norte (the Mexico/BajaNorte TZ) 2219 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2220 # - The rest of the country (the Mexico/General TZ) 2221 # 2222 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2223 # at 2:00 AM, the times in each zone are as follows: 2224 # BajaNorte: GMT+7 2225 # BajaSur: GMT+6 2226 # General: GMT+5 2227 # 2228 # 3. The rest of the year, the times are as follows: 2229 # BajaNorte: GMT+8 2230 # BajaSur: GMT+7 2231 # General: GMT+6 2232 # 2233 # The Decree was published in Mexico's Official Newspaper on January 4th. 2234 # 2235 # -------------- End Forwarded Message -------------- 2236 # From Paul Eggert (1996-06-12): 2237 # For an English translation of the decree, see 2238 # <a href="http://mexico-travel.com/extra/timezone_eng.html"> 2239 # "Diario Oficial: Time Zone Changeover" (1996-01-04). 2240 # </a> 2241 2242 # From Rives McDow (1998-10-08): 2243 # The State of Quintana Roo has reverted back to central STD and DST times 2244 # (i.e. UTC -0600 and -0500 as of 1998-08-02). 2245 2246 # From Rives McDow (2000-01-10): 2247 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2248 # zone 5 hours from the International Date Line, and will not observe daylight 2249 # savings time so as to stay on the same time zone as the southern part of 2250 # Arizona year round. 2251 2252 # From Jesper Norgaard, translating 2253 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2254 # In Oaxaca, the 55.000 teachers from the Section 22 of the National 2255 # Syndicate of Education Workers, refuse to apply daylight saving each 2256 # year, so that the more than 10,000 schools work at normal hour the 2257 # whole year. 2258 2259 # From Gwillim Law (2001-01-19): 2260 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2261 # (translated):... 2262 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2263 # that Summer Time will be reduced from seven to five months, starting 2264 # this year.... 2265 # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 2266 # [translated], says "summer time will ... take effect on the first Sunday 2267 # in May, and end on the last Sunday of September. 2268 2269 # From Arthur David Olson (2001-01-25): 2270 # The 2001-01-24 traditional Washington Post contained the page one 2271 # story "Timely Issue Divides Mexicans."... 2272 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2273 # ... Mexico City Mayor Lopez Obrador "...is threatening to keep 2274 # Mexico City and its 20 million residents on a different time than 2275 # the rest of the country..." In particular, Lopez Obrador would abolish 2276 # observation of Daylight Saving Time. 2277 2278 # <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 2279 # Official statute published by the Energy Department 2280 # </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2281 # and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 2282 2283 # From Paul Eggert (2001-03-03): 2284 # 2285 # <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 2286 # James F. Smith writes in today's LA Times 2287 # </a> 2288 # * Sonora will continue to observe standard time. 2289 # * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 2290 # the Federal District will not adopt DST. 2291 # * 4 of 16 district leaders announced they'll ignore the decree. 2292 # * The decree does not affect federal-controlled facilities including 2293 # the airport, banks, hospitals, and schools. 2294 # 2295 # For now we'll assume that the Federal District will bow to federal rules. 2296 2297 # From Jesper Norgaard (2001-04-01): 2298 # I found some references to the Mexican application of daylight 2299 # saving, which modifies what I had already sent you, stating earlier 2300 # that a number of northern Mexican states would go on daylight 2301 # saving. The modification reverts this to only cover Baja California 2302 # (Norte), while all other states (except Sonora, who has no daylight 2303 # saving all year) will follow the original decree of president 2304 # Vicente Fox, starting daylight saving May 6, 2001 and ending 2305 # September 30, 2001. 2306 # References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 2307 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2308 2309 # From Reuters (2001-09-04): 2310 # Mexico's Supreme Court on Tuesday declared that daylight savings was 2311 # unconstitutional in Mexico City, creating the possibility the 2312 # capital will be in a different time zone from the rest of the nation 2313 # next year.... The Supreme Court's ruling takes effect at 2:00 2314 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2315 # standard time. "This is so residents of the Federal District are not 2316 # subject to unexpected time changes," a statement from the court said. 2317 2318 # From Jesper Norgaard Welen (2002-03-12): 2319 # ... consulting my local grocery store(!) and my coworkers, they all insisted 2320 # that a new decision had been made to reinstate US style DST in Mexico.... 2321 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2322 # confirms this. Sonora as usual is the only state where DST is not applied. 2323 2324 # From Steffen Thorsen (2009-12-28): 2325 # 2326 # Steffen Thorsen wrote: 2327 # > Mexico's House of Representatives has approved a proposal for northern 2328 # > Mexico's border cities to share the same daylight saving schedule as 2329 # > the United States. 2330 # Now this has passed both the Congress and the Senate, so starting from 2331 # 2010, some border regions will be the same: 2332 # <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2333 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2334 # </a> 2335 # <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2336 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2337 # </a> 2338 # (Spanish) 2339 # 2340 # Could not find the new law text, but the proposed law text changes are here: 2341 # <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2342 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2343 # </a> 2344 # (Gaceta Parlamentaria) 2345 # 2346 # There is also a list of the votes here: 2347 # <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2348 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2349 # </a> 2350 # 2351 # Our page: 2352 # <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2353 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2354 # </a> 2355 2356 # From Arthur David Olson (2010-01-20): 2357 # The page 2358 # <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2359 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2360 # </a> 2361 # includes this text: 2362 # En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2363 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2364 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2365 # Tamaulipas, la aplicación de este horario estacional surtirá efecto 2366 # desde las dos horas del segundo domingo de marzo y concluirá a las dos 2367 # horas del primer domingo de noviembre. 2368 # En los municipios fronterizos que se encuentren ubicados en la franja 2369 # fronteriza norte en el territorio comprendido entre la línea 2370 # internacional y la línea paralela ubicada a una distancia de veinte 2371 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2372 # interior del país, la aplicación de este horario estacional surtirá 2373 # efecto desde las dos horas del segundo domingo de marzo y concluirá a 2374 # las dos horas del primer domingo de noviembre. 2375 2376 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2377 Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2378 Rule Mexico 1939 only - Jun 25 0:00 0 S 2379 Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2380 Rule Mexico 1941 only - Apr 1 0:00 0 S 2381 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2382 Rule Mexico 1944 only - May 1 0:00 0 S 2383 Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2384 Rule Mexico 1950 only - Jul 30 0:00 0 S 2385 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2386 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2387 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2388 Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2389 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2390 Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2391 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2392 # Quintana Roo 2393 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2394 -6:00 - CST 1981 Dec 23 2395 -5:00 Mexico E%sT 1998 Aug 2 2:00 2396 -6:00 Mexico C%sT 2397 # Campeche, Yucatan 2398 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2399 -6:00 - CST 1981 Dec 23 2400 -5:00 - EST 1982 Dec 2 2401 -6:00 Mexico C%sT 2402 # Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2403 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2404 -6:00 - CST 1988 2405 -6:00 US C%sT 1989 2406 -6:00 Mexico C%sT 2010 2407 -6:00 US C%sT 2408 # Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 2409 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2410 -6:00 - CST 1988 2411 -6:00 US C%sT 1989 2412 -6:00 Mexico C%sT 2413 # Central Mexico 2414 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2415 -7:00 - MST 1927 Jun 10 23:00 2416 -6:00 - CST 1930 Nov 15 2417 -7:00 - MST 1931 May 1 23:00 2418 -6:00 - CST 1931 Oct 2419 -7:00 - MST 1932 Apr 1 2420 -6:00 Mexico C%sT 2001 Sep 30 02:00 2421 -6:00 - CST 2002 Feb 20 2422 -6:00 Mexico C%sT 2423 # Chihuahua (near US border) 2424 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2425 -7:00 - MST 1927 Jun 10 23:00 2426 -6:00 - CST 1930 Nov 15 2427 -7:00 - MST 1931 May 1 23:00 2428 -6:00 - CST 1931 Oct 2429 -7:00 - MST 1932 Apr 1 2430 -6:00 - CST 1996 2431 -6:00 Mexico C%sT 1998 2432 -6:00 - CST 1998 Apr Sun>=1 3:00 2433 -7:00 Mexico M%sT 2010 2434 -7:00 US M%sT 2435 # Chihuahua (away from US border) 2436 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2437 -7:00 - MST 1927 Jun 10 23:00 2438 -6:00 - CST 1930 Nov 15 2439 -7:00 - MST 1931 May 1 23:00 2440 -6:00 - CST 1931 Oct 2441 -7:00 - MST 1932 Apr 1 2442 -6:00 - CST 1996 2443 -6:00 Mexico C%sT 1998 2444 -6:00 - CST 1998 Apr Sun>=1 3:00 2445 -7:00 Mexico M%sT 2446 # Sonora 2447 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2448 -7:00 - MST 1927 Jun 10 23:00 2449 -6:00 - CST 1930 Nov 15 2450 -7:00 - MST 1931 May 1 23:00 2451 -6:00 - CST 1931 Oct 2452 -7:00 - MST 1932 Apr 1 2453 -6:00 - CST 1942 Apr 24 2454 -7:00 - MST 1949 Jan 14 2455 -8:00 - PST 1970 2456 -7:00 Mexico M%sT 1999 2457 -7:00 - MST 2458 2459 # From Alexander Krivenyshev (2010-04-21): 2460 # According to news, Bahía de Banderas (Mexican state of Nayarit) 2461 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2462 # share the same time zone as nearby city Puerto Vallarta, Jalisco). 2463 # 2464 # (Spanish) 2465 # Bahía de Banderas homologa su horario al del centro del 2466 # país, a partir de este domingo 2467 # <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2468 # http://www.nayarit.gob.mx/notes.asp?id=20748 2469 # </a> 2470 # 2471 # Bahía de Banderas homologa su horario con el del Centro del 2472 # País 2473 # <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"> 2474 # 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" 2475 # </a> 2476 # 2477 # (English) 2478 # Puerto Vallarta and Bahía de Banderas: One Time Zone 2479 # <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2480 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2481 # </a> 2482 # 2483 # or 2484 # <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2485 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2486 # </a> 2487 # 2488 # "Mexico's Senate approved the amendments to the Mexican Schedule System that 2489 # will allow Bahía de Banderas and Puerto Vallarta to share the same time 2490 # zone ..." 2491 # Baja California Sur, Nayarit, Sinaloa 2492 2493 # From Arthur David Olson (2010-05-01): 2494 # Use "Bahia_Banderas" to keep the name to fourteen characters. 2495 2496 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2497 -7:00 - MST 1927 Jun 10 23:00 2498 -6:00 - CST 1930 Nov 15 2499 -7:00 - MST 1931 May 1 23:00 2500 -6:00 - CST 1931 Oct 2501 -7:00 - MST 1932 Apr 1 2502 -6:00 - CST 1942 Apr 24 2503 -7:00 - MST 1949 Jan 14 2504 -8:00 - PST 1970 2505 -7:00 Mexico M%sT 2506 2507 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2508 -7:00 - MST 1927 Jun 10 23:00 2509 -6:00 - CST 1930 Nov 15 2510 -7:00 - MST 1931 May 1 23:00 2511 -6:00 - CST 1931 Oct 2512 -7:00 - MST 1932 Apr 1 2513 -6:00 - CST 1942 Apr 24 2514 -7:00 - MST 1949 Jan 14 2515 -8:00 - PST 1970 2516 -7:00 Mexico M%sT 2010 Apr 4 2:00 2517 -6:00 Mexico C%sT 2518 2519 # Baja California (near US border) 2520 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2521 -7:00 - MST 1924 2522 -8:00 - PST 1927 Jun 10 23:00 2523 -7:00 - MST 1930 Nov 15 2524 -8:00 - PST 1931 Apr 1 2525 -8:00 1:00 PDT 1931 Sep 30 2526 -8:00 - PST 1942 Apr 24 2527 -8:00 1:00 PWT 1945 Aug 14 23:00u 2528 -8:00 1:00 PPT 1945 Nov 12 # Peace 2529 -8:00 - PST 1948 Apr 5 2530 -8:00 1:00 PDT 1949 Jan 14 2531 -8:00 - PST 1954 2532 -8:00 CA P%sT 1961 2533 -8:00 - PST 1976 2534 -8:00 US P%sT 1996 2535 -8:00 Mexico P%sT 2001 2536 -8:00 US P%sT 2002 Feb 20 2537 -8:00 Mexico P%sT 2010 2538 -8:00 US P%sT 2539 # Baja California (away from US border) 2540 Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2541 -7:00 - MST 1924 2542 -8:00 - PST 1927 Jun 10 23:00 2543 -7:00 - MST 1930 Nov 15 2544 -8:00 - PST 1931 Apr 1 2545 -8:00 1:00 PDT 1931 Sep 30 2546 -8:00 - PST 1942 Apr 24 2547 -8:00 1:00 PWT 1945 Aug 14 23:00u 2548 -8:00 1:00 PPT 1945 Nov 12 # Peace 2549 -8:00 - PST 1948 Apr 5 2550 -8:00 1:00 PDT 1949 Jan 14 2551 -8:00 - PST 1954 2552 -8:00 CA P%sT 1961 2553 -8:00 - PST 1976 2554 -8:00 US P%sT 1996 2555 -8:00 Mexico P%sT 2001 2556 -8:00 US P%sT 2002 Feb 20 2557 -8:00 Mexico P%sT 2558 # From Paul Eggert (2006-03-22): 2559 # Formerly there was an America/Ensenada zone, which differed from 2560 # America/Tijuana only in that it did not observe DST from 1976 2561 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2562 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2563 # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2564 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2565 # DST-observance was a town-by-town matter back then. This concerns 2566 # data after 1970 so most likely there should be at least one Zone 2567 # other than America/Tijuana for Baja, but it's not clear yet what its 2568 # name or contents should be. 2569 # 2570 # Revillagigedo Is 2571 # no information 2572 2573 ############################################################################### 2574 2575 # Anguilla 2576 # See 'southamerica'. 2577 2578 # Antigua and Barbuda 2579 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2580 Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2581 -5:00 - EST 1951 2582 -4:00 - AST 2583 2584 # Bahamas 2585 # 2586 # For 1899 Milne gives -5:09:29.5; round that. 2587 # 2588 # From Sue Williams (2006-12-07): 2589 # The Bahamas announced about a month ago that they plan to change their DST 2590 # rules to sync with the U.S. starting in 2007.... 2591 # http://www.jonesbahamas.com/?c=45&a=10412 2592 2593 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2594 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2595 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2596 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2597 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2598 -5:00 Bahamas E%sT 1976 2599 -5:00 US E%sT 2600 2601 # Barbados 2602 2603 # For 1899 Milne gives -3:58:29.2; round that. 2604 2605 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2606 Rule Barb 1977 only - Jun 12 2:00 1:00 D 2607 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2608 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2609 Rule Barb 1979 only - Sep 30 2:00 0 S 2610 Rule Barb 1980 only - Sep 25 2:00 0 S 2611 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2612 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2613 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2614 -4:00 Barb A%sT 2615 2616 # Belize 2617 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2618 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2619 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2620 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2621 Rule Belize 1973 only - Dec 5 0:00 1:00 D 2622 Rule Belize 1974 only - Feb 9 0:00 0 S 2623 Rule Belize 1982 only - Dec 18 0:00 1:00 D 2624 Rule Belize 1983 only - Feb 12 0:00 0 S 2625 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2626 Zone America/Belize -5:52:48 - LMT 1912 Apr 2627 -6:00 Belize C%sT 2628 2629 # Bermuda 2630 2631 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2632 # Bermuda dockyard, Ireland I; round that. 2633 2634 # From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2635 2636 # Next year, however, clocks in the US will go forward on the second Sunday 2637 # in March, until the first Sunday in November. And, after the Time Zone 2638 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2639 # Friday, the same thing will happen in Bermuda. 2640 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2641 2642 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2643 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2644 -4:00 - AST 1974 Apr 28 2:00 2645 -4:00 Canada A%sT 1976 2646 -4:00 US A%sT 2647 2648 # Cayman Is 2649 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2650 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2651 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 2652 -5:00 - EST 2653 2654 # Costa Rica 2655 2656 # Milne gives -5:36:13.3 as San Jose mean time; round to nearest. 2657 2658 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2659 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2660 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2661 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2662 # IATA SSIM (1991-09) says the following was at 1:00; 2663 # go with Shanks & Pottenger. 2664 Rule CR 1991 only - Jul 1 0:00 0 S 2665 Rule CR 1992 only - Mar 15 0:00 0 S 2666 # There are too many San Joses elsewhere, so we'll use 'Costa Rica'. 2667 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2668 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San Jose 2669 -5:36:13 - SJMT 1921 Jan 15 # San Jose Mean Time 2670 -6:00 CR C%sT 2671 # Coco 2672 # no information; probably like America/Costa_Rica 2673 2674 # Cuba 2675 2676 # From Paul Eggert (2013-02-21): 2677 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2678 # for the port, and -5:30 for meteorological observations. 2679 # For now, stick with Shanks & Pottenger. 2680 2681 # From Arthur David Olson (1999-03-29): 2682 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2683 # the Cuban National Team and the Baltimore Orioles was carried live on 2684 # the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2685 # During the game, play-by-play announcer Jim Hunter noted that 2686 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2687 # Time today." (The "two hour" remark referred to losing one hour of 2688 # sleep on 1999-03-28--when the announcers were in Cuba as it switched 2689 # to DST--and one more hour on 1999-04-04--when the announcers will have 2690 # returned to Baltimore, which switches on that date.) 2691 2692 # From Steffen Thorsen (2013-11-11): 2693 # DST start in Cuba in 2004 ... does not follow the same rules as the 2694 # years before. The correct date should be Sunday 2004-03-28 00:00 ... 2695 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2696 2697 # From Evert van der Veer via Steffen Thorsen (2004-10-28): 2698 # Cuba is not going back to standard time this year. 2699 # From Paul Eggert (2006-03-22): 2700 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2701 # says that it's due to a problem at the Antonio Guiteras 2702 # thermoelectric plant, and says "This October there will be no return 2703 # to normal hours (after daylight saving time)". 2704 # For now, let's assume that it's a temporary measure. 2705 2706 # From Carlos A. Carnero Delgado (2005-11-12): 2707 # This year (just like in 2004-2005) there's no change in time zone 2708 # adjustment in Cuba. We will stay in daylight saving time: 2709 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2710 2711 # From Jesper Norgaard Welen (2006-10-21): 2712 # An article in GRANMA INTERNACIONAL claims that Cuba will end 2713 # the 3 years of permanent DST next weekend, see 2714 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2715 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2716 # watches should be set back one hour -- going back to 00:00 hours -- returning 2717 # to the normal schedule.... 2718 2719 # From Paul Eggert (2007-03-02): 2720 # http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2721 # says Cuban clocks will advance at midnight on March 10. 2722 # For lack of better information, assume Cuba will use US rules, 2723 # except that it switches at midnight standard time as usual. 2724 # 2725 # From Steffen Thorsen (2007-10-25): 2726 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2727 # earlier - on the last Sunday of October, just like in 2006. 2728 # 2729 # He supplied these references: 2730 # 2731 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2732 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2733 # 2734 # From Alex Kryvenishev (2007-10-25): 2735 # Here is also article from Granma (Cuba): 2736 # 2737 # [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2738 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2739 # 2740 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2741 2742 # From Arthur David Olson (2008-03-09): 2743 # I'm in Maryland which is now observing United States Eastern Daylight 2744 # Time. At 9:44 local time I used RealPlayer to listen to 2745 # <a href="http://media.enet.cu/radioreloj"> 2746 # http://media.enet.cu/radioreloj 2747 # </a>, a Cuban information station, and heard 2748 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2749 # indicating that Cuba is still on standard time. 2750 2751 # From Steffen Thorsen (2008-03-12): 2752 # It seems that Cuba will start DST on Sunday, 2007-03-16... 2753 # It was announced yesterday, according to this source (in Spanish): 2754 # <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2755 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2756 # </a> 2757 # 2758 # Some more background information is posted here: 2759 # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2760 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2761 # </a> 2762 # 2763 # The article also says that Cuba has been observing DST since 1963, 2764 # while Shanks (and tzdata) has 1965 as the first date (except in the 2765 # 1940's). Many other web pages in Cuba also claim that it has been 2766 # observed since 1963, but with the exception of 1970 - an exception 2767 # which is not present in tzdata/Shanks. So there is a chance we need to 2768 # change some historic records as well. 2769 # 2770 # One example: 2771 # <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2772 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2773 # </a> 2774 2775 # From Jesper Norgaard Welen (2008-03-13): 2776 # The Cuban time change has just been confirmed on the most authoritative 2777 # web site, the Granma. Please check out 2778 # <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2779 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2780 # </a> 2781 # 2782 # Basically as expected after Steffen Thorsens information, the change 2783 # will take place midnight between Saturday and Sunday. 2784 2785 # From Arthur David Olson (2008-03-12): 2786 # Assume Sun>=15 (third Sunday) going forward. 2787 2788 # From Alexander Krivenyshev (2009-03-04) 2789 # According to the Radio Reloj - Cuba will start Daylight Saving Time on 2790 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2791 # not on midnight March 14 / March 15 as previously thought. 2792 # 2793 # <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2794 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2795 # (in Spanish) 2796 # </a> 2797 2798 # From Arthur David Olson (2009-03-09) 2799 # I listened over the Internet to 2800 # <a href="http://media.enet.cu/readioreloj"> 2801 # http://media.enet.cu/readioreloj 2802 # </a> 2803 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2804 # the time was announced as "diez cinco"--the same time as here, indicating 2805 # that has indeed switched to DST. Assume second Sunday from 2009 forward. 2806 2807 # From Steffen Thorsen (2011-03-08): 2808 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2809 # this year. Nothing about the end date known so far (if that has 2810 # changed at all). 2811 # 2812 # Source: 2813 # <a href="http://granma.co.cu/2011/03/08/nacional/artic01.html"> 2814 # http://granma.co.cu/2011/03/08/nacional/artic01.html 2815 # </a> 2816 # 2817 # Our info: 2818 # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html"> 2819 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2820 # </a> 2821 # 2822 # From Steffen Thorsen (2011-10-30) 2823 # Cuba will end DST two weeks later this year. Instead of going back 2824 # tonight, it has been delayed to 2011-11-13 at 01:00. 2825 # 2826 # One source (Spanish) 2827 # <a href="http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html"> 2828 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2829 # </a> 2830 # 2831 # Our page: 2832 # <a href="http://www.timeanddate.com/news/time/cuba-time-changes-2011.html"> 2833 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2834 # </a> 2835 # 2836 # From Steffen Thorsen (2012-03-01) 2837 # According to Radio Reloj, Cuba will start DST on Midnight between March 2838 # 31 and April 1. 2839 # 2840 # Radio Reloj has the following info (Spanish): 2841 # <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"> 2842 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2843 # </a> 2844 # 2845 # Our info on it: 2846 # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html"> 2847 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2848 # </a> 2849 2850 # From Steffen Thorsen (2012-11-03): 2851 # Radio Reloj and many other sources report that Cuba is changing back 2852 # to standard time on 2012-11-04: 2853 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2854 # From Paul Eggert (2012-11-03): 2855 # For now, assume the future rule is first Sunday in November. 2856 2857 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2858 Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2859 Rule Cuba 1928 only - Oct 10 0:00 0 S 2860 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2861 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2862 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2863 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2864 Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2865 Rule Cuba 1965 only - Sep 30 0:00 0 S 2866 Rule Cuba 1966 only - May 29 0:00 1:00 D 2867 Rule Cuba 1966 only - Oct 2 0:00 0 S 2868 Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2869 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2870 Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2871 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2872 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2873 Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2874 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2875 Rule Cuba 1978 only - May 7 0:00 1:00 D 2876 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2877 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2878 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2879 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2880 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2881 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2882 Rule Cuba 1996 only - Oct 6 0:00s 0 S 2883 Rule Cuba 1997 only - Oct 12 0:00s 0 S 2884 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2885 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2886 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2887 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2888 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2889 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2890 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2891 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2892 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2893 Rule Cuba 2011 only - Nov 13 0:00s 0 S 2894 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2895 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2896 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2897 2898 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2899 Zone America/Havana -5:29:28 - LMT 1890 2900 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2901 -5:00 Cuba C%sT 2902 2903 # Dominica 2904 # See 'southamerica'. 2905 2906 # Dominican Republic 2907 2908 # From Steffen Thorsen (2000-10-30): 2909 # Enrique Morales reported to me that the Dominican Republic has changed the 2910 # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2911 # http://www.listin.com.do/antes/261000/republica/princi.html 2912 2913 # From Paul Eggert (2000-12-04): 2914 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2915 2916 # From Rives McDow (2000-12-01): 2917 # Dominican Republic changed its mind and presidential decree on Tuesday, 2918 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2919 # Dominican Republic will be reverting to 8 hours from the International Date 2920 # Line, and will not be using DST in the foreseeable future. The reason they 2921 # decided to use DST was to be in synch with Puerto Rico, who was also going 2922 # to implement DST. When Puerto Rico didn't implement DST, the president 2923 # decided to revert. 2924 2925 2926 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2927 Rule DR 1966 only - Oct 30 0:00 1:00 D 2928 Rule DR 1967 only - Feb 28 0:00 0 S 2929 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2930 Rule DR 1970 only - Feb 21 0:00 0 S 2931 Rule DR 1971 only - Jan 20 0:00 0 S 2932 Rule DR 1972 1974 - Jan 21 0:00 0 S 2933 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2934 Zone America/Santo_Domingo -4:39:36 - LMT 1890 2935 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2936 -5:00 DR E%sT 1974 Oct 27 2937 -4:00 - AST 2000 Oct 29 02:00 2938 -5:00 US E%sT 2000 Dec 3 01:00 2939 -4:00 - AST 2940 2941 # El Salvador 2942 2943 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2944 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2945 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2946 # There are too many San Salvadors elsewhere, so use America/El_Salvador 2947 # instead of America/San_Salvador. 2948 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2949 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2950 -6:00 Salv C%sT 2951 2952 # Grenada 2953 # Guadeloupe 2954 # St Barthelemy 2955 # St Martin (French part) 2956 # See 'southamerica'. 2957 2958 # Guatemala 2959 # 2960 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2961 # Diario Co Latino, at 2962 # http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2963 # says in an article dated 2006-04-19 that the Guatemalan government had 2964 # decided on that date to advance official time by 60 minutes, to lessen the 2965 # impact of the elevated cost of oil.... Daylight saving time will last from 2966 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2967 # From Paul Eggert (2006-06-22): 2968 # The Ministry of Energy and Mines, press release CP-15/2006 2969 # (2006-04-19), says DST ends at 24:00. See 2970 # <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2971 2972 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2973 Rule Guat 1973 only - Nov 25 0:00 1:00 D 2974 Rule Guat 1974 only - Feb 24 0:00 0 S 2975 Rule Guat 1983 only - May 21 0:00 1:00 D 2976 Rule Guat 1983 only - Sep 22 0:00 0 S 2977 Rule Guat 1991 only - Mar 23 0:00 1:00 D 2978 Rule Guat 1991 only - Sep 7 0:00 0 S 2979 Rule Guat 2006 only - Apr 30 0:00 1:00 D 2980 Rule Guat 2006 only - Oct 1 0:00 0 S 2981 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2982 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2983 -6:00 Guat C%sT 2984 2985 # Haiti 2986 # From Gwillim Law (2005-04-15): 2987 # Risto O. Nykanen wrote me that Haiti is now on DST. 2988 # I searched for confirmation, and I found a 2989 # <a href="http://www.haitianconsulate.org/time.doc"> press release 2990 # on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2991 # </a>. Translated from French, it says: 2992 # 2993 # "The Prime Minister's Communication Office notifies the public in general 2994 # and the press in particular that, following a decision of the Interior 2995 # Ministry and the Territorial Collectivities [I suppose that means the 2996 # provinces], Haiti will move to Eastern Daylight Time in the night from next 2997 # Saturday the 2nd to Sunday the 3rd. 2998 # 2999 # "Consequently, the Prime Minister's Communication Office wishes to inform 3000 # the population that the country's clocks will be set forward one hour 3001 # starting at midnight. This provision will hold until the last Saturday in 3002 # October 2005. 3003 # 3004 # "Port-au-Prince, March 31, 2005" 3005 # 3006 # From Steffen Thorsen (2006-04-04): 3007 # I have been informed by users that Haiti observes DST this year like 3008 # last year, so the current "only" rule for 2005 might be changed to a 3009 # "max" rule or to last until 2006. (Who knows if they will observe DST 3010 # next year or if they will extend their DST like US/Canada next year). 3011 # 3012 # I have found this article about it (in French): 3013 # http://www.haitipressnetwork.com/news.cfm?articleID=7612 3014 # 3015 # The reason seems to be an energy crisis. 3016 3017 # From Stephen Colebourne (2007-02-22): 3018 # Some IATA info: Haiti won't be having DST in 2007. 3019 3020 # From Steffen Thorsen (2012-03-11): 3021 # According to several news sources, Haiti will observe DST this year, 3022 # apparently using the same start and end date as USA/Canada. 3023 # So this means they have already changed their time. 3024 # 3025 # http://www.alterpresse.org/spip.php?article12510 3026 # http://radiovision2000haiti.net/home/?p=13253 3027 # 3028 # From Arthur David Olson (2012-03-11): 3029 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3030 # 3:00 a.m. rather than the traditional Haitian jump at midnight. 3031 # Assume a US-style fall back as well. 3032 3033 # From Steffen Thorsen (2013-03-10): 3034 # It appears that Haiti is observing DST this year as well, same rules 3035 # as US/Canada. They did it last year as well, and it looks like they 3036 # are going to observe DST every year now... 3037 # 3038 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3039 # http://www.canalplushaiti.net/?p=6714 3040 3041 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3042 Rule Haiti 1983 only - May 8 0:00 1:00 D 3043 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3044 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3045 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3046 # Go with IATA. 3047 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3048 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3049 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3050 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3051 Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 3052 Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S 3053 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3054 Zone America/Port-au-Prince -4:49:20 - LMT 1890 3055 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3056 -5:00 Haiti E%sT 3057 3058 # Honduras 3059 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3060 3061 # From Paul Eggert (2006-05-05): 3062 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3063 # saying Honduras will start using DST midnight Saturday, effective 4 3064 # months until September. La Tribuna reported today 3065 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3066 # of Honduras, refused to back down on this. 3067 3068 # From Jesper Norgaard Welen (2006-08-08): 3069 # It seems that Honduras has returned from DST to standard time this Monday at 3070 # 00:00 hours (prolonging Sunday to 25 hours duration). 3071 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3072 3073 # From Paul Eggert (2006-08-08): 3074 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 3075 # <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 3076 # It mentions executive decree 18-2006. 3077 3078 # From Steffen Thorsen (2006-08-17): 3079 # Honduras will observe DST from 2007 to 2009, exact dates are not 3080 # published, I have located this authoritative source: 3081 # http://www.presidencia.gob.hn/noticia.aspx?nId=47 3082 3083 # From Steffen Thorsen (2007-03-30): 3084 # http://www.laprensahn.com/pais_nota.php?id04962=7386 3085 # So it seems that Honduras will not enter DST this year.... 3086 3087 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3088 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3089 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3090 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3091 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3092 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3093 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3094 -6:00 Hond C%sT 3095 # 3096 # Great Swan I ceded by US to Honduras in 1972 3097 3098 # Jamaica 3099 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3100 # unspecified official document, and says "This time is used throughout the 3101 # island". Go with Milne. Round to the nearest second as required by zic. 3102 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3103 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3104 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3105 -5:00 - EST 1974 Apr 28 2:00 3106 -5:00 US E%sT 1984 3107 -5:00 - EST 3108 3109 # Martinique 3110 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3111 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3112 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3113 -4:00 - AST 1980 Apr 6 3114 -4:00 1:00 ADT 1980 Sep 28 3115 -4:00 - AST 3116 3117 # Montserrat 3118 # See 'southamerica'. 3119 3120 # Nicaragua 3121 # 3122 # This uses Shanks & Pottenger for times before 2005. 3123 # 3124 # From Steffen Thorsen (2005-04-12): 3125 # I've got reports from 8 different people that Nicaragua just started 3126 # DST on Sunday 2005-04-10, in order to save energy because of 3127 # expensive petroleum. The exact end date for DST is not yet 3128 # announced, only "September" but some sites also say "mid-September". 3129 # Some background information is available on the President's official site: 3130 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3131 # The Decree, no 23-2005 is available here: 3132 # 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 3133 # 3134 # From Paul Eggert (2005-05-01): 3135 # The decree doesn't say anything about daylight saving, but for now let's 3136 # assume that it is daylight saving.... 3137 # 3138 # From Gwillim Law (2005-04-21): 3139 # The Associated Press story on the time change, which can be found at 3140 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3141 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3142 # time that a change of clocks was applied to save energy was in the year 2000 3143 # during the Arnoldo Aleman administration."... 3144 # The northamerica file says that Nicaragua has been on UTC-6 continuously 3145 # since December 1998. I wasn't able to find any details of Nicaraguan time 3146 # changes in 2000. Perhaps a note could be added to the northamerica file, to 3147 # the effect that we have indirect evidence that DST was observed in 2000. 3148 # 3149 # From Jesper Norgaard Welen (2005-11-02): 3150 # Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3151 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3152 # (2005-09-26) 3153 # 3154 # From Jesper Norgaard Welen (2006-05-05): 3155 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3156 # (my informal translation) 3157 # By order of the president of the republic, Enrique Bolanos, Nicaragua 3158 # advanced by sixty minutes their official time, yesterday at 2 in the 3159 # morning, and will stay that way until 30.th. of september. 3160 # 3161 # From Jesper Norgaard Welen (2006-09-30): 3162 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3163 # My informal translation runs: 3164 # The natural sun time is restored in all the national territory, in that the 3165 # time is returned one hour at 01:00 am of October 1 of 2006. 3166 # 3167 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3168 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3169 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3170 Rule Nic 2005 only - Apr 10 0:00 1:00 D 3171 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3172 Rule Nic 2006 only - Apr 30 2:00 1:00 D 3173 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3174 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3175 Zone America/Managua -5:45:08 - LMT 1890 3176 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3177 -6:00 - CST 1973 May 3178 -5:00 - EST 1975 Feb 16 3179 -6:00 Nic C%sT 1992 Jan 1 4:00 3180 -5:00 - EST 1992 Sep 24 3181 -6:00 - CST 1993 3182 -5:00 - EST 1997 3183 -6:00 Nic C%sT 3184 3185 # Panama 3186 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3187 Zone America/Panama -5:18:08 - LMT 1890 3188 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 3189 -5:00 - EST 3190 3191 # Puerto Rico 3192 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3193 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3194 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3195 -4:00 - AST 1942 May 3 3196 -4:00 US A%sT 1946 3197 -4:00 - AST 3198 3199 # St Kitts-Nevis 3200 # St Lucia 3201 # See 'southamerica'. 3202 3203 # St Pierre and Miquelon 3204 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3205 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3206 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3207 -4:00 - AST 1980 May 3208 -3:00 - PMST 1987 # Pierre & Miquelon Time 3209 -3:00 Canada PM%sT 3210 3211 # St Vincent and the Grenadines 3212 # See 'southamerica'. 3213 3214 # Turks and Caicos 3215 # 3216 # From Chris Dunn in 3217 # <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 3218 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3219 # daylight saving dates for time changes have been adjusted to match 3220 # the recent U.S. change of dates. 3221 # 3222 # From Brian Inglis (2007-04-28): 3223 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3224 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3225 # rows before that there is an out of date entry for Oct: 3226 # "Eastern Standard Times Begins 2007 3227 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3228 # indicating that the normal ET rules are followed. 3229 # 3230 # From Paul Eggert (2006-05-01): 3231 # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 3232 # says they switch at midnight. Go with Shanks & Pottenger. 3233 # 3234 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3235 Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D 3236 Rule TC 1979 2006 - Oct lastSun 2:00 0 S 3237 Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 3238 Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D 3239 Rule TC 2007 max - Nov Sun>=1 2:00 0 S 3240 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3241 Zone America/Grand_Turk -4:44:32 - LMT 1890 3242 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3243 -5:00 TC E%sT 3244 3245 # British Virgin Is 3246 # Virgin Is 3247 # See 'southamerica'.