1 # <pre> 2 # @(#)northamerica 8.34 3 # This file is in the public domain, so clarified as of 4 # 2009-05-17 by Arthur David Olson. 5 6 # also includes Central America and the Caribbean 7 8 # This data is by no means authoritative; if you think you know better, 9 # go ahead and edit the file (and please send any changes to 10 # tz (a] elsie.nci.nih.gov for general use in the future). 11 12 # From Paul Eggert (1999-03-22): 13 # A reliable and entertaining source about time zones is 14 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 15 16 ############################################################################### 17 18 # United States 19 20 # From Paul Eggert (1999-03-31): 21 # Howse writes (pp 121-125) that time zones were invented by 22 # Professor Charles Ferdinand Dowd (1825-1904), 23 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 24 # His pamphlet ``A System of National Time for Railroads'' (1870) 25 # was the result of his proposals at the Convention of Railroad Trunk Lines 26 # in New York City (1869-10). His 1870 proposal was based on Washington, DC, 27 # but in 1872-05 he moved the proposed origin to Greenwich. 28 # His proposal was adopted by the railroads on 1883-11-18 at 12:00, 29 # and the most of the country soon followed suit. 30 31 # From Paul Eggert (2005-04-16): 32 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 33 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 34 35 # From Paul Eggert (2006-03-22): 36 # A good source for time zone historical data in the US is 37 # Thomas G. Shanks, The American Atlas (5th edition), 38 # San Diego: ACS Publications, Inc. (1991). 39 # Make sure you have the errata sheet; the book is somewhat useless without it. 40 # It is the source for most of the pre-1991 US entries below. 41 42 # From Paul Eggert (2001-03-06): 43 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin 44 # in his whimsical essay ``An Economical Project for Diminishing the Cost 45 # of Light'' published in the Journal de Paris (1784-04-26). 46 # Not everyone is happy with the results: 47 # 48 # I don't really care how time is reckoned so long as there is some 49 # agreement about it, but I object to being told that I am saving 50 # daylight when my reason tells me that I am doing nothing of the kind. 51 # I even object to the implication that I am wasting something 52 # valuable if I stay in bed after the sun has risen. As an admirer 53 # of moonlight I resent the bossy insistence of those who want to 54 # reduce my time for enjoying it. At the back of the Daylight Saving 55 # scheme I detect the bony, blue-fingered hand of Puritanism, eager 56 # to push people into bed earlier, and get them up earlier, to make 57 # them healthy, wealthy and wise in spite of themselves. 58 # 59 # -- Robertson Davies, The diary of Samuel Marchbanks, 60 # Clarke, Irwin (1947), XIX, Sunday 61 # 62 # For more about the first ten years of DST in the United States, see 63 # Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 64 # Ten years of daylight saving from the Pittsburgh standpoint 65 # (Carnegie Library of Pittsburgh, 1927)</a>. 66 # 67 # Shanks says that DST was called "War Time" in the US in 1918 and 1919. 68 # However, DST was imposed by the Standard Time Act of 1918, which 69 # was the first nationwide legal time standard, and apparently 70 # time was just called "Standard Time" or "Daylight Saving Time". 71 72 # From Arthur David Olson: 73 # US Daylight Saving Time ended on the last Sunday of *October* in 1974. 74 # See, for example, the front page of the Saturday, 1974-10-26 75 # and Sunday, 1974-10-27 editions of the Washington Post. 76 77 # From Arthur David Olson: 78 # Before the Uniform Time Act of 1966 took effect in 1967, observance of 79 # Daylight Saving Time in the US was by local option, except during wartime. 80 81 # From Arthur David Olson (2000-09-25): 82 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 83 # In the introduction, Oboler spoke of "Eastern Peace Time." 84 # An AltaVista search turned up 85 # <a href="http://rowayton.org/rhs/hstaug45.html">: 86 # "When the time is announced over the radio now, it is 'Eastern Peace 87 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 88 # </a> (August 1945) by way of confirmation. 89 90 # From Joseph Gallant citing 91 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 92 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 93 # to switch to London for Attlee's address, but the American people 94 # never got to hear his speech live. According to one press account, 95 # CBS' Bob Trout was first to announce the word of Japan's surrender, 96 # but a few seconds later, NBC, ABC and Mutual also flashed the word 97 # of surrender, all of whom interrupting the bells of Big Ben in 98 # London which were to precede Mr. Attlee's speech. 99 100 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 101 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 102 # 103 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 104 # Any announcement from Asia would reach St. John's New York newsroom on a 105 # wire service teletype machine, which had prescribed signals for major news. 106 # Associated Press, for example, would ring five bells before spewing out 107 # typed copy of an important story, and 10 bells for news "of transcendental 108 # importance." 109 # 110 # On Aug. 14, stalling while talking steadily into the NBC networks' open 111 # microphone, St. John heard five bells and waited only to hear a sixth bell, 112 # before announcing confidently: "Ladies and gentlemen, World War II is over. 113 # The Japanese have agreed to our surrender terms." 114 # 115 # He had scored a 20-second scoop on other broadcasters. 116 117 # From Arthur David Olson (2005-08-22): 118 # Paul has been careful to use the "US" rules only in those locations 119 # that are part of the United States; this reflects the real scope of 120 # U.S. government action. So even though the "US" rules have changed 121 # in the latest release, other countries won't be affected. 122 123 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 124 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 125 Rule US 1918 1919 - Oct lastSun 2:00 0 S 126 Rule US 1942 only - Feb 9 2:00 1:00 W # War 127 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 128 Rule US 1945 only - Sep 30 2:00 0 S 129 Rule US 1967 2006 - Oct lastSun 2:00 0 S 130 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 131 Rule US 1974 only - Jan 6 2:00 1:00 D 132 Rule US 1975 only - Feb 23 2:00 1:00 D 133 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 134 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 135 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 136 Rule US 2007 max - Nov Sun>=1 2:00 0 S 137 138 # From Arthur David Olson, 2005-12-19 139 # We generate the files specified below to guard against old files with 140 # obsolete information being left in the time zone binary directory. 141 # We limit the list to names that have appeared in previous versions of 142 # this time zone package. 143 # We do these as separate Zones rather than as Links to avoid problems if 144 # a particular place changes whether it observes DST. 145 # We put these specifications here in the northamerica file both to 146 # increase the chances that they'll actually get compiled and to 147 # avoid the need to duplicate the US rules in another file. 148 149 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 150 Zone EST -5:00 - EST 151 Zone MST -7:00 - MST 152 Zone HST -10:00 - HST 153 Zone EST5EDT -5:00 US E%sT 154 Zone CST6CDT -6:00 US C%sT 155 Zone MST7MDT -7:00 US M%sT 156 Zone PST8PDT -8:00 US P%sT 157 158 # From Bob Devine (1988-01-28): 159 # ...Alaska (and Hawaii) had the timezone names changed in 1967. 160 # old new 161 # Pacific Standard Time(PST) -same- 162 # Yukon Standard Time(YST) -same- 163 # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 164 # Nome Standard Time (NT) Bering Standard Time (BST) 165 # 166 # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 167 # The YST zone now covers nearly all of the state, AHST just part 168 # of the Aleutian islands. No DST. 169 170 # From Paul Eggert (1995-12-19): 171 # The tables below use `NST', not `NT', for Nome Standard Time. 172 # I invented `CAWT' for Central Alaska War Time. 173 174 # From U. S. Naval Observatory (1989-01-19): 175 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 176 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 177 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 178 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 179 # USA MOUNTAIN 7 H BEHIND UTC DENVER 180 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 181 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 182 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 183 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 184 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 185 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 186 # USA - " - 9 H BEHIND UTC APR 3 - OCT 30 187 # USA HAWAII 10 H BEHIND UTC 188 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 189 190 # From Arthur David Olson (1989-01-21): 191 # The above dates are for 1988. 192 # Note the "AKST" and "AKDT" abbreviations, the claim that there's 193 # no DST in Samoa, and the claim that there is DST in Alaska and the 194 # Aleutians. 195 196 # From Arthur David Olson (1988-02-13): 197 # Legal standard time zone names, from United States Code (1982 Edition and 198 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 199 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 200 # took effect), as explained in sections 263 and 261: 201 # (none) 202 # United States standard eastern time 203 # United States standard mountain time 204 # United States standard central time 205 # United States standard Pacific time 206 # (none) 207 # United States standard Alaska time 208 # (none) 209 # Next, names from 1967-04-01 until 1983-11-30 (the date for 210 # public law 98-181): 211 # Atlantic standard time 212 # eastern standard time 213 # central standard time 214 # mountain standard time 215 # Pacific standard time 216 # Yukon standard time 217 # Alaska-Hawaii standard time 218 # Bering standard time 219 # And after 1983-11-30: 220 # Atlantic standard time 221 # eastern standard time 222 # central standard time 223 # mountain standard time 224 # Pacific standard time 225 # Alaska standard time 226 # Hawaii-Aleutian standard time 227 # Samoa standard time 228 # The law doesn't give abbreviations. 229 # 230 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 231 # Public law 106-564 (2000-12-23) introduced the abbreviation 232 # "Chamorro Standard Time" for time in Guam and the Northern Marianas. 233 # See the file "australasia". 234 235 # From Arthur David Olson, 2005-08-09 236 # The following was signed into law on 2005-08-08. 237 # 238 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 239 # (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 240 # U.S.C. 260a(a)) is amended-- 241 # (1) by striking `first Sunday of April' and inserting `second 242 # Sunday of March'; and 243 # (2) by striking `last Sunday of October' and inserting `first 244 # Sunday of November'. 245 # (b) Effective Date- Subsection (a) shall take effect 1 year after the 246 # date of enactment of this Act or March 1, 2007, whichever is later. 247 # (c) Report to Congress- Not later than 9 months after the effective 248 # date stated in subsection (b), the Secretary shall report to Congress 249 # on the impact of this section on energy consumption in the United 250 # States. 251 # (d) Right to Revert- Congress retains the right to revert the 252 # Daylight Saving Time back to the 2005 time schedules once the 253 # Department study is complete. 254 255 # US eastern time, represented by New York 256 257 # Connecticut, Delaware, District of Columbia, most of Florida, 258 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 259 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 260 # New Hampshire, New Jersey, New York, North Carolina, Ohio, 261 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 262 # Vermont, Virginia, West Virginia 263 264 # From Dave Cantor (2004-11-02): 265 # Early this summer I had the occasion to visit the Mount Washington 266 # Observatory weather station atop (of course!) Mount Washington [, NH].... 267 # One of the staff members said that the station was on Eastern Standard Time 268 # and didn't change their clocks for Daylight Saving ... so that their 269 # reports will always have times which are 5 hours behind UTC. 270 271 # From Paul Eggert (2005-08-26): 272 # According to today's Huntsville Times 273 # <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 274 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City 275 # in Russell County, Lanett in Chambers County and some towns in Lee County, 276 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 277 # Roberts, city administrator in Phenix City. as saying "We are in the Central 278 # time zone, but we do go by the Eastern time zone because so many people work 279 # in Columbus." 280 281 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 282 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 283 Rule NYC 1920 only - Oct lastSun 2:00 0 S 284 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 285 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 286 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 287 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 288 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 289 -5:00 US E%sT 1920 290 -5:00 NYC E%sT 1942 291 -5:00 US E%sT 1946 292 -5:00 NYC E%sT 1967 293 -5:00 US E%sT 294 295 # US central time, represented by Chicago 296 297 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 298 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 299 # Washington counties), Illinois, western Indiana 300 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 301 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 302 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 303 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 304 # western Tennessee, most of Texas, Wisconsin 305 306 # From Larry M. Smith (2006-04-26) re Wisconsin: 307 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 308 # is currently enforced at the 01:00 time of change. Because the local 309 # "bar time" in the state corresponds to 02:00, a number of citations 310 # are issued for the "sale of class 'B' alcohol after prohibited 311 # hours" within the deviated hour of this change every year.... 312 # 313 # From Douglas R. Bomberg (2007-03-12): 314 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 315 # Statue 175 closer in synch with the US Congress' intent.... 316 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 317 318 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 319 Rule Chicago 1920 only - Jun 13 2:00 1:00 D 320 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 321 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 322 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 323 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 324 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 325 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 326 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 327 -6:00 US C%sT 1920 328 -6:00 Chicago C%sT 1936 Mar 1 2:00 329 -5:00 - EST 1936 Nov 15 2:00 330 -6:00 Chicago C%sT 1942 331 -6:00 US C%sT 1946 332 -6:00 Chicago C%sT 1967 333 -6:00 US C%sT 334 # Oliver County, ND switched from mountain to central time on 1992-10-25. 335 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 336 -7:00 US M%sT 1992 Oct 25 02:00 337 -6:00 US C%sT 338 # Morton County, ND, switched from mountain to central time on 339 # 2003-10-26, except for the area around Mandan which was already central time. 340 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 341 # Officially this switch also included part of Sioux County, and 342 # Jones, Mellette, and Todd Counties in South Dakota; 343 # but in practice these other counties were already observing central time. 344 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 345 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 346 -7:00 US M%sT 2003 Oct 26 02:00 347 -6:00 US C%sT 348 349 # US mountain time, represented by Denver 350 # 351 # Colorado, far western Kansas, Montana, western 352 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 353 # New Mexico, southwestern North Dakota, 354 # western South Dakota, far western Texas (El Paso County, Hudspeth County, 355 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 356 # 357 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 358 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 359 Rule Denver 1920 only - Oct lastSun 2:00 0 S 360 Rule Denver 1921 only - May 22 2:00 0 S 361 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 362 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 363 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 364 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 365 -7:00 US M%sT 1920 366 -7:00 Denver M%sT 1942 367 -7:00 US M%sT 1946 368 -7:00 Denver M%sT 1967 369 -7:00 US M%sT 370 371 # US Pacific time, represented by Los Angeles 372 # 373 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 374 # Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 375 # and the northern three-quarters of Idaho county), 376 # most of Nevada, most of Oregon, and Washington 377 # 378 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 379 Rule CA 1948 only - Mar 14 2:00 1:00 D 380 Rule CA 1949 only - Jan 1 2:00 0 S 381 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 382 Rule CA 1950 1961 - Sep lastSun 2:00 0 S 383 Rule CA 1962 1966 - Oct lastSun 2:00 0 S 384 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 385 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 386 -8:00 US P%sT 1946 387 -8:00 CA P%sT 1967 388 -8:00 US P%sT 389 390 # Alaska 391 # AK%sT is the modern abbreviation for -9:00 per USNO. 392 # 393 # From Paul Eggert (2001-05-30): 394 # Howse writes that Alaska switched from the Julian to the Gregorian calendar, 395 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 396 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 397 # also a Friday. Include only the time zone part of this transition, 398 # ignoring the switch from Julian to Gregorian, since we can't represent 399 # the Julian calendar. 400 # 401 # As far as we know, none of the exact locations mentioned below were 402 # permanently inhabited in 1867 by anyone using either calendar. 403 # (Yakutat was colonized by the Russians in 1799, but the settlement 404 # was destroyed in 1805 by a Yakutat-kon war party.) However, there 405 # were nearby inhabitants in some cases and for our purposes perhaps 406 # it's best to simply use the official transition. 407 # 408 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 409 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 410 -8:57:41 - LMT 1900 Aug 20 12:00 411 -8:00 - PST 1942 412 -8:00 US P%sT 1946 413 -8:00 - PST 1969 414 -8:00 US P%sT 1983 Oct 30 2:00 415 -9:00 US Y%sT 1983 Nov 30 416 -9:00 US AK%sT 417 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 418 -9:18:55 - LMT 1900 Aug 20 12:00 419 -9:00 - YST 1942 420 -9:00 US Y%sT 1946 421 -9:00 - YST 1969 422 -9:00 US Y%sT 1983 Nov 30 423 -9:00 US AK%sT 424 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 425 -9:59:36 - LMT 1900 Aug 20 12:00 426 -10:00 - CAT 1942 427 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 428 -10:00 US CAT/CAPT 1946 # Peace 429 -10:00 - CAT 1967 Apr 430 -10:00 - AHST 1969 431 -10:00 US AH%sT 1983 Oct 30 2:00 432 -9:00 US Y%sT 1983 Nov 30 433 -9:00 US AK%sT 434 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 435 -11:01:38 - LMT 1900 Aug 20 12:00 436 -11:00 - NST 1942 437 -11:00 US N%sT 1946 438 -11:00 - NST 1967 Apr 439 -11:00 - BST 1969 440 -11:00 US B%sT 1983 Oct 30 2:00 441 -9:00 US Y%sT 1983 Nov 30 442 -9:00 US AK%sT 443 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 444 -11:46:38 - LMT 1900 Aug 20 12:00 445 -11:00 - NST 1942 446 -11:00 US N%sT 1946 447 -11:00 - NST 1967 Apr 448 -11:00 - BST 1969 449 -11:00 US B%sT 1983 Oct 30 2:00 450 -10:00 US AH%sT 1983 Nov 30 451 -10:00 US HA%sT 452 # The following switches don't quite make our 1970 cutoff. 453 # 454 # Shanks writes that part of southwest Alaska (e.g. Aniak) 455 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 456 # and another part (e.g. Akiak) made the same switch five weeks later. 457 # 458 # From David Flater (2004-11-09): 459 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 460 # Historic Preservation Commission, provided this information, which 461 # suggests that Unalaska deviated from statutory time from early 1967 462 # possibly until 1983: 463 # 464 # Minutes of the Unalaska City Council Meeting, January 10, 1967: 465 # "Except for St. Paul and Akutan, Unalaska is the only important 466 # location not on Alaska Standard Time. The following resolution was 467 # made by William Robinson and seconded by Henry Swanson: Be it 468 # resolved that the City of Unalaska hereby goes to Alaska Standard 469 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 470 # January 14, Alaska Standard Time.) This resolution was passed with 471 # three votes for and one against." 472 473 # Hawaii 474 # 475 # From Arthur David Olson: 476 # And then there's Hawaii. 477 # DST was observed for one day in 1933; 478 # standard time was changed by half an hour in 1947; 479 # it's always standard as of 1986. 480 # 481 # From Paul Eggert: 482 # Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 483 # 484 Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 485 -10:30 - HST 1933 Apr 30 2:00 486 -10:30 1:00 HDT 1933 May 21 2:00 487 -10:30 US H%sT 1947 Jun 8 2:00 488 -10:00 - HST 489 490 # Now we turn to US areas that have diverged from the consensus since 1970. 491 492 # Arizona mostly uses MST. 493 494 # From Paul Eggert (2002-10-20): 495 # 496 # The information in the rest of this paragraph is derived from the 497 # <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 498 # Daylight Saving Time web page (2002-01-23)</a> maintained by the 499 # Arizona State Library, Archives and Public Records. 500 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 501 # time, but by federal law railroads, airlines, bus lines, military 502 # personnel, and some engaged in interstate commerce continued to 503 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 504 # Gazette says that was the date the law changed, and that 04-01 was 505 # the date the state's clocks would change. In 1945 the State of 506 # Arizona used standard time all year, again with exceptions only as 507 # mandated by federal law. Arizona observed DST in 1967, but Arizona 508 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 509 # 510 # Shanks says the 1944 experiment came to an end on 1944-03-17. 511 # Go with the Arizona State Library instead. 512 513 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 514 -7:00 US M%sT 1944 Jan 1 00:01 515 -7:00 - MST 1944 Apr 1 00:01 516 -7:00 US M%sT 1944 Oct 1 00:01 517 -7:00 - MST 1967 518 -7:00 US M%sT 1968 Mar 21 519 -7:00 - MST 520 # From Arthur David Olson (1988-02-13): 521 # A writer from the Inter Tribal Council of Arizona, Inc., 522 # notes in private correspondence dated 1987-12-28 that "Presently, only the 523 # Navajo Nation participates in the Daylight Saving Time policy, due to its 524 # large size and location in three states." (The "only" means that other 525 # tribal nations don't use DST.) 526 527 Link America/Denver America/Shiprock 528 529 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 530 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 531 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 532 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 533 # Teton, Twin Falls, Valley, Washington counties, and the southern 534 # quarter of Idaho county) and eastern Oregon (most of Malheur County) 535 # switched four weeks late in 1974. 536 # 537 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 538 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 539 -8:00 US P%sT 1923 May 13 2:00 540 -7:00 US M%sT 1974 541 -7:00 - MST 1974 Feb 3 2:00 542 -7:00 US M%sT 543 544 # Indiana 545 # 546 # For a map of Indiana's time zone regions, see: 547 # <a href="http://www.mccsc.edu/time.html"> 548 # What time is it in Indiana? 549 # </a> (2006-03-01) 550 # 551 # From Paul Eggert (2007-08-17): 552 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 553 # with the following exceptions: 554 # 555 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 556 # Vandenburgh, and Warrick counties have been like America/Chicago. 557 # 558 # - Dearborn and Ohio counties have been like America/New_York. 559 # 560 # - Clark, Floyd, and Harrison counties have been like 561 # America/Kentucky/Louisville. 562 # 563 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 564 # and Switzerland counties have their own time zone histories as noted below. 565 # 566 # Shanks partitioned Indiana into 345 regions, each with its own time history, 567 # and wrote ``Even newspaper reports present contradictory information.'' 568 # Those Hoosiers! Such a flighty and changeable people! 569 # Fortunately, most of the complexity occurred before our cutoff date of 1970. 570 # 571 # Other than Indianapolis, the Indiana place names are so nondescript 572 # that they would be ambiguous if we left them at the `America' level. 573 # So we reluctantly put them all in a subdirectory `America/Indiana'. 574 575 # From Paul Eggert (2005-08-16): 576 # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 577 578 # From Nathan Stratton Treadway (2006-03-30): 579 # http://www.dot.gov/affairs/dot0406.htm [3705 B] 580 # From Deborah Goldsmith (2006-01-18): 581 # http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 582 # From Paul Eggert (2006-01-20): 583 # It says "DOT is relocating the time zone boundary in Indiana to move Starke, 584 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 585 # Eastern Time Zone to the Central Time Zone.... The effective date of 586 # this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 587 # changeover date from standard time to Daylight Saving Time." 588 # Strictly speaking, this means the affected counties will change their 589 # clocks twice that night, but this obviously is in error. The intent 590 # is that 01:59:59 EST be followed by 02:00:00 CDT. 591 592 # From Gwillim Law (2007-02-10): 593 # The Associated Press has been reporting that Pulaski County, Indiana is 594 # going to switch from Central to Eastern Time on March 11, 2007.... 595 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 596 597 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 598 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 599 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 600 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 601 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 602 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 603 -6:00 US C%sT 1920 604 -6:00 Indianapolis C%sT 1942 605 -6:00 US C%sT 1946 606 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 607 -5:00 - EST 1957 Sep 29 2:00 608 -6:00 - CST 1958 Apr 27 2:00 609 -5:00 - EST 1969 610 -5:00 US E%sT 1971 611 -5:00 - EST 2006 612 -5:00 US E%sT 613 # 614 # Eastern Crawford County, Indiana, left its clocks alone in 1974, 615 # as well as from 1976 through 2005. 616 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 617 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 618 Rule Marengo 1951 only - Sep lastSun 2:00 0 S 619 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 620 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 621 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 622 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 623 -6:00 US C%sT 1951 624 -6:00 Marengo C%sT 1961 Apr 30 2:00 625 -5:00 - EST 1969 626 -5:00 US E%sT 1974 Jan 6 2:00 627 -6:00 1:00 CDT 1974 Oct 27 2:00 628 -5:00 US E%sT 1976 629 -5:00 - EST 2006 630 -5:00 US E%sT 631 # 632 # Daviess, Dubois, Knox, and Martin Counties, Indiana, 633 # switched from eastern to central time in April 2006, then switched back 634 # in November 2007. 635 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 636 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 637 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 638 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 639 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 640 Rule Vincennes 1955 only - May 1 0:00 1:00 D 641 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 642 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 643 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 644 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 645 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 646 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 647 -6:00 US C%sT 1946 648 -6:00 Vincennes C%sT 1964 Apr 26 2:00 649 -5:00 - EST 1969 650 -5:00 US E%sT 1971 651 -5:00 - EST 2006 Apr 2 2:00 652 -6:00 US C%sT 2007 Nov 4 2:00 653 -5:00 US E%sT 654 # 655 # Perry County, Indiana, switched from eastern to central time in April 2006. 656 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 657 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 658 Rule Perry 1946 only - Sep lastSun 2:00 0 S 659 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 660 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 661 Rule Perry 1955 only - May 1 0:00 1:00 D 662 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 663 Rule Perry 1960 only - Oct lastSun 2:00 0 S 664 Rule Perry 1961 only - Sep lastSun 2:00 0 S 665 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 666 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 667 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 668 -6:00 US C%sT 1946 669 -6:00 Perry C%sT 1964 Apr 26 2:00 670 -5:00 - EST 1969 671 -5:00 US E%sT 1971 672 -5:00 - EST 2006 Apr 2 2:00 673 -6:00 US C%sT 674 # 675 # Pike County, Indiana moved from central to eastern time in 1977, 676 # then switched back in 2006, then switched back again in 2007. 677 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 678 Rule Pike 1955 only - May 1 0:00 1:00 D 679 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 680 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 681 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 682 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 683 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 684 -6:00 US C%sT 1955 685 -6:00 Pike C%sT 1965 Apr 25 2:00 686 -5:00 - EST 1966 Oct 30 2:00 687 -6:00 US C%sT 1977 Oct 30 2:00 688 -5:00 - EST 2006 Apr 2 2:00 689 -6:00 US C%sT 2007 Nov 4 2:00 690 -5:00 US E%sT 691 # 692 # Starke County, Indiana moved from central to eastern time in 1991, 693 # then switched back in 2006. 694 # From Arthur David Olson (1991-10-28): 695 # An article on page A3 of the Sunday, 1991-10-27 Washington Post 696 # notes that Starke County switched from Central time to Eastern time as of 697 # 1991-10-27. 698 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 699 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 700 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 701 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 702 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 703 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 704 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 705 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 706 -6:00 US C%sT 1947 707 -6:00 Starke C%sT 1962 Apr 29 2:00 708 -5:00 - EST 1963 Oct 27 2:00 709 -6:00 US C%sT 1991 Oct 27 2:00 710 -5:00 - EST 2006 Apr 2 2:00 711 -6:00 US C%sT 712 # 713 # Pulaski County, Indiana, switched from eastern to central time in 714 # April 2006 and then switched back in March 2007. 715 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 716 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 717 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 718 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 719 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 720 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 721 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 722 -6:00 US C%sT 1946 723 -6:00 Pulaski C%sT 1961 Apr 30 2:00 724 -5:00 - EST 1969 725 -5:00 US E%sT 1971 726 -5:00 - EST 2006 Apr 2 2:00 727 -6:00 US C%sT 2007 Mar 11 2:00 728 -5:00 US E%sT 729 # 730 # Switzerland County, Indiana, did not observe DST from 1973 through 2005. 731 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 732 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 733 -6:00 US C%sT 1954 Apr 25 2:00 734 -5:00 - EST 1969 735 -5:00 US E%sT 1973 736 -5:00 - EST 2006 737 -5:00 US E%sT 738 739 # Part of Kentucky left its clocks alone in 1974. 740 # This also includes Clark, Floyd, and Harrison counties in Indiana. 741 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 742 Rule Louisville 1921 only - May 1 2:00 1:00 D 743 Rule Louisville 1921 only - Sep 1 2:00 0 S 744 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 745 Rule Louisville 1941 only - Sep lastSun 2:00 0 S 746 Rule Louisville 1946 only - Jun 2 2:00 0 S 747 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 748 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 749 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 750 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 751 -6:00 US C%sT 1921 752 -6:00 Louisville C%sT 1942 753 -6:00 US C%sT 1946 754 -6:00 Louisville C%sT 1961 Jul 23 2:00 755 -5:00 - EST 1968 756 -5:00 US E%sT 1974 Jan 6 2:00 757 -6:00 1:00 CDT 1974 Oct 27 2:00 758 -5:00 US E%sT 759 # 760 # Wayne County, Kentucky 761 # 762 # From 763 # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 764 # Lake Cumberland LIFE 765 # </a> (1999-01-29) via WKYM-101.7: 766 # Clinton County has joined Wayne County in asking the DoT to change from 767 # the Central to the Eastern time zone.... The Wayne County government made 768 # the same request in December. And while Russell County officials have not 769 # taken action, the majority of respondents to a poll conducted there in 770 # August indicated they would like to change to "fast time" also. 771 # The three Lake Cumberland counties are the farthest east of any U.S. 772 # location in the Central time zone. 773 # 774 # From Rich Wales (2000-08-29): 775 # After prolonged debate, and despite continuing deep differences of opinion, 776 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 777 # (-0500) time. They won't "fall back" this year. See Sara Shipley, 778 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 779 # 780 # From Paul Eggert (2001-07-16): 781 # The final rule was published in the 782 # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 783 # Federal Register 65, 160 (2000-08-17), page 50154-50158. 784 # </a> 785 # 786 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 787 -6:00 US C%sT 1946 788 -6:00 - CST 1968 789 -6:00 US C%sT 2000 Oct 29 2:00 790 -5:00 US E%sT 791 792 793 # From Rives McDow (2000-08-30): 794 # Here ... are all the changes in the US since 1985. 795 # Kearny County, KS (put all of county on central; 796 # previously split between MST and CST) ... 1990-10 797 # Starke County, IN (from CST to EST) ... 1991-10 798 # Oliver County, ND (from MST to CST) ... 1992-10 799 # West Wendover, NV (from PST TO MST) ... 1999-10 800 # Wayne County, KY (from CST to EST) ... 2000-10 801 # 802 # From Paul Eggert (2001-07-17): 803 # We don't know where the line used to be within Kearny County, KS, 804 # so omit that change for now. 805 # See America/Indiana/Knox for the Starke County, IN change. 806 # See America/North_Dakota/Center for the Oliver County, ND change. 807 # West Wendover, NV officially switched from Pacific to mountain time on 808 # 1999-10-31. See the 809 # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 810 # Federal Register 64, 203 (1999-10-21), page 56705-56707. 811 # </a> 812 # However, the Federal Register says that West Wendover already operated 813 # on mountain time, and the rule merely made this official; 814 # hence a separate tz entry is not needed. 815 816 # Michigan 817 # 818 # From Bob Devine (1988-01-28): 819 # Michigan didn't observe DST from 1968 to 1973. 820 # 821 # From Paul Eggert (1999-03-31): 822 # Shanks writes that Michigan started using standard time on 1885-09-18, 823 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 824 # that Detroit kept 825 # 826 # local time until 1900 when the City Council decreed that clocks should 827 # be put back twenty-eight minutes to Central Standard Time. Half the 828 # city obeyed, half refused. After considerable debate, the decision 829 # was rescinded and the city reverted to Sun time. A derisive offer to 830 # erect a sundial in front of the city hall was referred to the 831 # Committee on Sewers. Then, in 1905, Central time was adopted 832 # by city vote. 833 # 834 # This story is too entertaining to be false, so go with Howse over Shanks. 835 # 836 # From Paul Eggert (2001-03-06): 837 # Garland (1927) writes ``Cleveland and Detroit advanced their clocks 838 # one hour in 1914.'' This change is not in Shanks. We have no more 839 # info, so omit this for now. 840 # 841 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 842 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 843 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 844 Rule Detroit 1948 only - Sep lastSun 2:00 0 S 845 Rule Detroit 1967 only - Jun 14 2:00 1:00 D 846 Rule Detroit 1967 only - Oct lastSun 2:00 0 S 847 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 848 Zone America/Detroit -5:32:11 - LMT 1905 849 -6:00 - CST 1915 May 15 2:00 850 -5:00 - EST 1942 851 -5:00 US E%sT 1946 852 -5:00 Detroit E%sT 1973 853 -5:00 US E%sT 1975 854 -5:00 - EST 1975 Apr 27 2:00 855 -5:00 US E%sT 856 # 857 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 858 # switched from EST to CST/CDT in 1973. 859 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 860 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 861 Rule Menominee 1946 only - Sep lastSun 2:00 0 S 862 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 863 Rule Menominee 1966 only - Oct lastSun 2:00 0 S 864 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 865 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 866 -6:00 US C%sT 1946 867 -6:00 Menominee C%sT 1969 Apr 27 2:00 868 -5:00 - EST 1973 Apr 29 2:00 869 -6:00 US C%sT 870 871 # Navassa 872 # administered by the US Fish and Wildlife Service 873 # claimed by US under the provisions of the 1856 Guano Islands Act 874 # also claimed by Haiti 875 # occupied 1857/1900 by the Navassa Phosphate Co 876 # US lighthouse 1917/1996-09 877 # currently uninhabited 878 # see Mark Fineman, ``An Isle Rich in Guano and Discord'', 879 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites 880 # Jimmy Skaggs, _The Great Guano Rush_ (1994). 881 882 ################################################################################ 883 884 885 # From Paul Eggert (2006-03-22): 886 # A good source for time zone historical data outside the U.S. is 887 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 888 # San Diego: ACS Publications, Inc. (2003). 889 # 890 # Gwillim Law writes that a good source 891 # for recent time zone data is the International Air Transport 892 # Association's Standard Schedules Information Manual (IATA SSIM), 893 # published semiannually. Law sent in several helpful summaries 894 # of the IATA's data after 1990. 895 # 896 # Except where otherwise noted, Shanks & Pottenger is the source for 897 # entries through 1990, and IATA SSIM is the source for entries afterwards. 898 # 899 # Other sources occasionally used include: 900 # 901 # Edward W. Whitman, World Time Differences, 902 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 903 # which I found in the UCLA library. 904 # 905 # <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 906 # William Willett, The Waste of Daylight, 19th edition 907 # </a> (1914-03) 908 # 909 # See the `europe' file for Greenland. 910 911 # Canada 912 913 # From Alain LaBont<e'> (1994-11-14): 914 # I post here the time zone abbreviations standardized in Canada 915 # for both English and French in the CAN/CSA-Z234.4-89 standard.... 916 # 917 # UTC Standard time Daylight savings time 918 # offset French English French English 919 # -2:30 - - HAT NDT 920 # -3 - - HAA ADT 921 # -3:30 HNT NST - - 922 # -4 HNA AST HAE EDT 923 # -5 HNE EST HAC CDT 924 # -6 HNC CST HAR MDT 925 # -7 HNR MST HAP PDT 926 # -8 HNP PST HAY YDT 927 # -9 HNY YST - - 928 # 929 # HN: Heure Normale ST: Standard Time 930 # HA: Heure Avanc<e'>e DT: Daylight saving Time 931 # 932 # A: de l'Atlantique Atlantic 933 # C: du Centre Central 934 # E: de l'Est Eastern 935 # M: Mountain 936 # N: Newfoundland 937 # P: du Pacifique Pacific 938 # R: des Rocheuses 939 # T: de Terre-Neuve 940 # Y: du Yukon Yukon 941 # 942 # From Paul Eggert (1994-11-22): 943 # Alas, this sort of thing must be handled by localization software. 944 945 # Unless otherwise specified, the data for Canada are all from Shanks 946 # & Pottenger. 947 948 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 949 # 2007-03-01): 950 # The British Columbia government announced yesterday that it will 951 # adjust daylight savings next year to align with changes in the 952 # U.S. and the rest of Canada.... 953 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 954 # ... 955 # Nova Scotia 956 # Daylight saving time will be extended by four weeks starting in 2007.... 957 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 958 # 959 # [For New Brunswick] the new legislation dictates that the time change is to 960 # be done at 02:00 instead of 00:01. 961 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 962 # ... 963 # Manitoba has traditionally changed the clock every fall at 03:00. 964 # As of 2006, the transition is to take place one hour earlier at 02:00. 965 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 966 # ... 967 # [Alberta, Ontario, Quebec] will follow US rules. 968 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 969 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 970 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 971 # ... 972 # P.E.I. will follow US rules.... 973 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 974 # ... 975 # Province of Newfoundland and Labrador.... 976 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 977 # ... 978 # Yukon 979 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 980 # ... 981 # N.W.T. will follow US rules. Whoever maintains the government web site 982 # does not seem to believe in bookmarks. To see the news release, click the 983 # following link and search for "Daylight Savings Time Change". Press the 984 # "Daylight Savings Time Change" link; it will fire off a popup using 985 # JavaScript. 986 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 987 # ... 988 # Nunavut 989 # An amendment to the Interpretation Act was registered on February 19/2007.... 990 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 991 992 # From Paul Eggert (2006-04-25): 993 # H. David Matthews and Mary Vincent's map 994 # <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 995 # "It's about TIME", _Canadian Geographic_ (September-October 1998) 996 # </a> contains detailed boundaries for regions observing nonstandard 997 # time and daylight saving time arrangements in Canada circa 1998. 998 # 999 # INMS, the Institute for National Measurement Standards in Ottawa, has <a 1000 # href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 1001 # information about standard and daylight saving time zones in Canada. 1002 # </a> (updated periodically). 1003 # Its unofficial information is often taken from Matthews and Vincent. 1004 1005 # From Paul Eggert (2006-06-27): 1006 # For now, assume all of DST-observing Canada will fall into line with the 1007 # new US DST rules, 1008 1009 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1010 Rule Canada 1918 only - Apr 14 2:00 1:00 D 1011 Rule Canada 1918 only - Oct 31 2:00 0 S 1012 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1013 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1014 Rule Canada 1945 only - Sep 30 2:00 0 S 1015 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1016 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1017 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1018 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1019 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1020 1021 1022 # Newfoundland and Labrador 1023 1024 # From Paul Eggert (2000-10-02): 1025 # Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1026 # but the only part of Labrador that follows the rules is the 1027 # southeast corner, including Port Hope Simpson and Mary's Harbour, 1028 # but excluding, say, Black Tickle. 1029 1030 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1031 Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1032 Rule StJohns 1917 only - Sep 17 2:00 0 S 1033 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1034 Rule StJohns 1919 only - May 5 23:00 1:00 D 1035 Rule StJohns 1919 only - Aug 12 23:00 0 S 1036 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1037 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1038 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1039 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1040 # Pottenger. 1041 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1042 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1043 # Whitman gives the following transitions: 1044 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1045 # but go with Shanks & Pottenger and assume they used Canadian rules. 1046 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1047 # Apr 30 - Sep 24; go with Shanks & Pottenger. 1048 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1049 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1050 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1051 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1052 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1053 # From Paul Eggert (2000-10-02): 1054 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1055 # at 00:01 local time. For now, assume it started in 1987. 1056 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1057 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1058 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1059 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1060 Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D 1061 Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S 1062 # 1063 # St John's has an apostrophe, but Posix file names can't have apostrophes. 1064 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1065 Zone America/St_Johns -3:30:52 - LMT 1884 1066 -3:30:52 StJohns N%sT 1918 1067 -3:30:52 Canada N%sT 1919 1068 -3:30:52 StJohns N%sT 1935 Mar 30 1069 -3:30 StJohns N%sT 1942 May 11 1070 -3:30 Canada N%sT 1946 1071 -3:30 StJohns N%sT 1072 1073 # most of east Labrador 1074 1075 # The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 1076 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1077 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1078 -3:30:52 - NST 1918 1079 -3:30:52 Canada N%sT 1919 1080 -3:30:52 - NST 1935 Mar 30 1081 -3:30 - NST 1936 1082 -3:30 StJohns N%sT 1942 May 11 1083 -3:30 Canada N%sT 1946 1084 -3:30 StJohns N%sT 1966 Mar 15 2:00 1085 -4:00 StJohns A%sT 1086 1087 1088 # west Labrador, Nova Scotia, Prince Edward I 1089 1090 # From Paul Eggert (2006-03-22): 1091 # Shanks & Pottenger write that since 1970 most of this region has been like 1092 # Halifax. Many locales did not observe peacetime DST until 1972; 1093 # Glace Bay, NS is the largest that we know of. 1094 # Shanks & Pottenger also write that Liverpool, NS was the only town 1095 # in Canada to observe DST in 1971 but not 1970; for now we'll assume 1096 # this is a typo. 1097 1098 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1099 Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1100 Rule Halifax 1916 only - Oct 1 0:00 0 S 1101 Rule Halifax 1920 only - May 9 0:00 1:00 D 1102 Rule Halifax 1920 only - Aug 29 0:00 0 S 1103 Rule Halifax 1921 only - May 6 0:00 1:00 D 1104 Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1105 Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1106 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1107 Rule Halifax 1923 only - Sep 4 0:00 0 S 1108 Rule Halifax 1924 only - Sep 15 0:00 0 S 1109 Rule Halifax 1925 only - Sep 28 0:00 0 S 1110 Rule Halifax 1926 only - May 16 0:00 1:00 D 1111 Rule Halifax 1926 only - Sep 13 0:00 0 S 1112 Rule Halifax 1927 only - May 1 0:00 1:00 D 1113 Rule Halifax 1927 only - Sep 26 0:00 0 S 1114 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1115 Rule Halifax 1928 only - Sep 9 0:00 0 S 1116 Rule Halifax 1929 only - Sep 3 0:00 0 S 1117 Rule Halifax 1930 only - Sep 15 0:00 0 S 1118 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1119 Rule Halifax 1932 only - May 1 0:00 1:00 D 1120 Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1121 Rule Halifax 1933 only - Oct 2 0:00 0 S 1122 Rule Halifax 1934 only - May 20 0:00 1:00 D 1123 Rule Halifax 1934 only - Sep 16 0:00 0 S 1124 Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1125 Rule Halifax 1935 only - Sep 30 0:00 0 S 1126 Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1127 Rule Halifax 1936 only - Sep 14 0:00 0 S 1128 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1129 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1130 Rule Halifax 1939 only - May 28 0:00 1:00 D 1131 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1132 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1133 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1134 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1135 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1136 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1137 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1138 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1139 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1140 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1141 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1142 -4:00 Halifax A%sT 1918 1143 -4:00 Canada A%sT 1919 1144 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1145 -4:00 Canada A%sT 1946 1146 -4:00 Halifax A%sT 1974 1147 -4:00 Canada A%sT 1148 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1149 -4:00 Canada A%sT 1953 1150 -4:00 Halifax A%sT 1954 1151 -4:00 - AST 1972 1152 -4:00 Halifax A%sT 1974 1153 -4:00 Canada A%sT 1154 1155 # New Brunswick 1156 1157 # From Paul Eggert (2007-01-31): 1158 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1159 # says they changed at 00:01 through 2006, and 1160 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1161 # clear that this was the case since at least 1993. 1162 # For now, assume it started in 1993. 1163 1164 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1165 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1166 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1167 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1168 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1169 Rule Moncton 1939 only - May 27 1:00 1:00 D 1170 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1171 Rule Moncton 1940 only - May 19 1:00 1:00 D 1172 Rule Moncton 1941 only - May 4 1:00 1:00 D 1173 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1174 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1175 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1176 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1177 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1178 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1179 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1180 -5:00 - EST 1902 Jun 15 1181 -4:00 Canada A%sT 1933 1182 -4:00 Moncton A%sT 1942 1183 -4:00 Canada A%sT 1946 1184 -4:00 Moncton A%sT 1973 1185 -4:00 Canada A%sT 1993 1186 -4:00 Moncton A%sT 2007 1187 -4:00 Canada A%sT 1188 1189 # Quebec 1190 1191 # From Paul Eggert (2006-07-09): 1192 # Shanks & Pottenger write that since 1970 most of Quebec has been 1193 # like Montreal. 1194 1195 # From Paul Eggert (2006-06-27): 1196 # Matthews and Vincent (1998) also write that Quebec east of the -63 1197 # meridian is supposed to observe AST, but residents as far east as 1198 # Natashquan use EST/EDT, and residents east of Natashquan use AST. 1199 # In "Official time in Quebec" the Quebec department of justice writes in 1200 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1201 # that "The residents of the Municipality of the 1202 # Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1203 # Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1204 # written and use Atlantic standard time all year round. The same applies to 1205 # the residents of the Native facilities along the lower North Shore." 1206 # <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1207 # says this common practice was codified into law as of 2007. 1208 # For lack of better info, guess this practice began around 1970, contra to 1209 # Shanks & Pottenger who have this region observing AST/ADT. 1210 1211 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1212 Rule Mont 1917 only - Mar 25 2:00 1:00 D 1213 Rule Mont 1917 only - Apr 24 0:00 0 S 1214 Rule Mont 1919 only - Mar 31 2:30 1:00 D 1215 Rule Mont 1919 only - Oct 25 2:30 0 S 1216 Rule Mont 1920 only - May 2 2:30 1:00 D 1217 Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1218 Rule Mont 1921 only - May 1 2:00 1:00 D 1219 Rule Mont 1922 only - Apr 30 2:00 1:00 D 1220 Rule Mont 1924 only - May 17 2:00 1:00 D 1221 Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1222 Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1223 # The 1927-to-1937 rules can be expressed more simply as 1224 # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1225 # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1226 # The rules below avoid use of 24:00 1227 # (which pre-1998 versions of zic cannot handle). 1228 Rule Mont 1927 only - May 1 0:00 1:00 D 1229 Rule Mont 1927 1932 - Sep lastSun 0:00 0 S 1230 Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1231 Rule Mont 1932 only - May 1 0:00 1:00 D 1232 Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1233 Rule Mont 1933 only - Oct 1 0:00 0 S 1234 Rule Mont 1934 1939 - Sep lastSun 0:00 0 S 1235 Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1236 Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1237 Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1238 Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1239 Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1240 1241 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1242 Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1243 -4:00 Canada A%sT 1970 1244 -4:00 - AST 1245 Zone America/Montreal -4:54:16 - LMT 1884 1246 -5:00 Mont E%sT 1918 1247 -5:00 Canada E%sT 1919 1248 -5:00 Mont E%sT 1942 Feb 9 2:00s 1249 -5:00 Canada E%sT 1946 1250 -5:00 Mont E%sT 1974 1251 -5:00 Canada E%sT 1252 1253 1254 # Ontario 1255 1256 # From Paul Eggert (2006-07-09): 1257 # Shanks & Pottenger write that since 1970 most of Ontario has been like 1258 # Toronto. 1259 # Thunder Bay skipped DST in 1973. 1260 # Many smaller locales did not observe peacetime DST until 1974; 1261 # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1262 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1263 1264 # From Mark Brader (2003-07-26): 1265 # [According to the Toronto Star] Orillia, Ontario, adopted DST 1266 # effective Saturday, 1912-06-22, 22:00; the article mentions that 1267 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1268 # have already done so. In Orillia DST was to run until Saturday, 1269 # 1912-08-31 (no time mentioned), but it was met with considerable 1270 # hostility from certain segments of the public, and was revoked after 1271 # only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1272 # presumably that should be -07-06. (1912-06-19, -07-12; also letters 1273 # earlier in June). 1274 # 1275 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1276 1277 # From Paul Eggert (1997-10-17): 1278 # Mark Brader writes that an article in the 1997-10-14 Toronto Star 1279 # says that Atikokan, Ontario currently does not observe DST, 1280 # but will vote on 11-10 whether to use EST/EDT. 1281 # He also writes that the 1282 # <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 1283 # Ontario Time Act (1990, Chapter T.9) 1284 # </a> 1285 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1286 # Officially Atikokan is therefore on CST/CDT, and most likely this report 1287 # concerns a non-official time observed as a matter of local practice. 1288 # 1289 # From Paul Eggert (2000-10-02): 1290 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1291 # New Osnaburgh observe CST all year, that Big Trout Lake observes 1292 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1293 # violation of the official Ontario rules. 1294 # 1295 # From Paul Eggert (2006-07-09): 1296 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1297 # 2005-07-21 Chronicle-Journal, which said: 1298 # 1299 # The clocks in Atikokan stay set on standard time year-round. 1300 # This means they spend about half the time on central time and 1301 # the other half on eastern time. 1302 # 1303 # For the most part, the system works, Mayor Dennis Brown said. 1304 # 1305 # "The majority of businesses in Atikokan deal more with Eastern 1306 # Canada, but there are some that deal with Western Canada," he 1307 # said. "I don't see any changes happening here." 1308 # 1309 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1310 # [New Osnaburgh] follow the same practice." 1311 1312 # From Garry McKinnon (2006-07-14) via Chris Walton: 1313 # I chatted with a member of my board who has an outstanding memory 1314 # and a long history in Atikokan (and in the telecom industry) and he 1315 # can say for certain that Atikokan has been practicing the current 1316 # time keeping since 1952, at least. 1317 1318 # From Paul Eggert (2006-07-17): 1319 # Shanks & Pottenger say that Atikokan has agreed with Rainy River 1320 # ever since standard time was introduced, but the information from 1321 # McKinnon sounds more authoritative. For now, assume that Atikokan 1322 # switched to EST immediately after WWII era daylight saving time 1323 # ended. This matches the old (less-populous) America/Coral_Harbour 1324 # entry since our cutoff date of 1970, so we can move 1325 # America/Coral_Harbour to the 'backward' file. 1326 1327 # From Mark Brader (2010-03-06): 1328 # 1329 # Currently the database has: 1330 # 1331 # # Ontario 1332 # 1333 # # From Paul Eggert (2006-07-09): 1334 # # Shanks & Pottenger write that since 1970 most of Ontario has been like 1335 # # Toronto. 1336 # # Thunder Bay skipped DST in 1973. 1337 # # Many smaller locales did not observe peacetime DST until 1974; 1338 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1339 # 1340 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1341 # right corner of page 1, it says that Toronto will return to standard 1342 # time at 2 am Sunday morning (which agrees with the database), and that: 1343 # 1344 # The one-hour setback will go into effect throughout most of Ontario, 1345 # except in areas like Windsor which remains on standard time all year. 1346 # 1347 # Windsor is, of course, a lot larger than Nipigon. 1348 # 1349 # I only came across this incidentally. I don't know if Windsor began 1350 # observing DST when Detroit did, or in 1974, or on some other date. 1351 # 1352 # By the way, the article continues by noting that: 1353 # 1354 # Some cities in the United States have pushed the deadline back 1355 # three weeks and will change over from daylight saving in October. 1356 1357 # From Arthur David Olson (2010-07-17): 1358 # 1359 # "Standard Time and Time Zones in Canada" appeared in 1360 # The Journal of The Royal Astronomical Society of Canada, 1361 # volume 26, number 2 (February 1932) and, as of 2010-07-17, 1362 # was available at 1363 # <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1364 # http://adsabs.harvard.edu/full/1932JRASC..26...49S 1365 # </a> 1366 # 1367 # It includes the text below (starting on page 57): 1368 # 1369 # A list of the places in Canada using daylight saving time would 1370 # require yearly revision. From information kindly furnished by 1371 # the provincial governments and by the postmasters in many cities 1372 # and towns, it is found that the following places used daylight sav- 1373 # ing in 1930. The information for the province of Quebec is definite, 1374 # for the other provinces only approximate: 1375 # 1376 # Province Daylight saving time used 1377 # Prince Edward Island Not used. 1378 # Nova Scotia In Halifax only. 1379 # New Brunswick In St. John only. 1380 # Quebec In the following places: 1381 # Montreal Lachine 1382 # Quebec Mont-Royal 1383 # Levis Iberville 1384 # St. Lambert Cap de la Madeleine 1385 # Verdun Loretteville 1386 # Westmount Richmond 1387 # Outremont St. Jerome 1388 # Longueuil Greenfield Park 1389 # Arvida Waterloo 1390 # Chambly-Canton Beaulieu 1391 # Melbourne La Tuque 1392 # St. Theophile Buckingham 1393 # Ontario Used generally in the cities and towns along 1394 # the southerly part of the province. Not 1395 # used in the northwesterlhy part. 1396 # Manitoba Not used. 1397 # Saskatchewan In Regina only. 1398 # Alberta Not used. 1399 # British Columbia Not used. 1400 # 1401 # With some exceptions, the use of daylight saving may be said to be limited 1402 # to those cities and towns lying between Quebec city and Windsor, Ont. 1403 1404 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1405 Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1406 Rule Toronto 1919 only - Oct 26 0:00 0 S 1407 Rule Toronto 1920 only - May 2 2:00 1:00 D 1408 Rule Toronto 1920 only - Sep 26 0:00 0 S 1409 Rule Toronto 1921 only - May 15 2:00 1:00 D 1410 Rule Toronto 1921 only - Sep 15 2:00 0 S 1411 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1412 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1413 # was meant. 1414 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1415 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1416 # The 1927-to-1939 rules can be expressed more simply as 1417 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1418 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1419 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1420 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1421 # The rules below avoid use of Sun>=25 1422 # (which pre-2004 versions of zic cannot handle). 1423 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1424 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1425 Rule Toronto 1932 only - May 1 2:00 1:00 D 1426 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1427 Rule Toronto 1933 only - Oct 1 2:00 0 S 1428 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1429 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1430 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1431 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1432 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1433 Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1434 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1435 Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1436 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1437 # Shanks & Pottenger say Toronto ended DST a week early in 1971, 1438 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1439 # is wrong, and that he had confirmed it by checking the 1971-10-30 1440 # Toronto Star, which said that DST was ending 1971-10-31 as usual. 1441 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1442 1443 # From Paul Eggert (2003-07-27): 1444 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1445 # Port Arthur, Ontario, the principle of the Bill has been in 1446 # operation for the past three years, and in the City of Moose Jaw, 1447 # Saskatchewan, for one year." 1448 1449 # From David Bryan via Tory Tronrud, Director/Curator, 1450 # Thunder Bay Museum (2003-11-12): 1451 # There is some suggestion, however, that, by-law or not, daylight 1452 # savings time was being practiced in Fort William and Port Arthur 1453 # before 1909.... [I]n 1910, the line between the Eastern and Central 1454 # Time Zones was permanently moved about two hundred miles west to 1455 # include the Thunder Bay area.... When Canada adopted daylight 1456 # savings time in 1916, Fort William and Port Arthur, having done so 1457 # already, did not change their clocks.... During the Second World 1458 # War,... [t]he cities agreed to implement DST during the summer 1459 # months for the remainder of the war years. 1460 1461 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1462 Zone America/Toronto -5:17:32 - LMT 1895 1463 -5:00 Canada E%sT 1919 1464 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1465 -5:00 Canada E%sT 1946 1466 -5:00 Toronto E%sT 1974 1467 -5:00 Canada E%sT 1468 Zone America/Thunder_Bay -5:57:00 - LMT 1895 1469 -6:00 - CST 1910 1470 -5:00 - EST 1942 1471 -5:00 Canada E%sT 1970 1472 -5:00 Mont E%sT 1973 1473 -5:00 - EST 1974 1474 -5:00 Canada E%sT 1475 Zone America/Nipigon -5:53:04 - LMT 1895 1476 -5:00 Canada E%sT 1940 Sep 29 1477 -5:00 1:00 EDT 1942 Feb 9 2:00s 1478 -5:00 Canada E%sT 1479 Zone America/Rainy_River -6:18:16 - LMT 1895 1480 -6:00 Canada C%sT 1940 Sep 29 1481 -6:00 1:00 CDT 1942 Feb 9 2:00s 1482 -6:00 Canada C%sT 1483 Zone America/Atikokan -6:06:28 - LMT 1895 1484 -6:00 Canada C%sT 1940 Sep 29 1485 -6:00 1:00 CDT 1942 Feb 9 2:00s 1486 -6:00 Canada C%sT 1945 Sep 30 2:00 1487 -5:00 - EST 1488 1489 1490 # Manitoba 1491 1492 # From Rob Douglas (2006-04-06): 1493 # the old Manitoba Time Act - as amended by Bill 2, assented to 1494 # March 27, 1987 ... said ... 1495 # "between two o'clock Central Standard Time in the morning of 1496 # the first Sunday of April of each year and two o'clock Central 1497 # Standard Time in the morning of the last Sunday of October next 1498 # following, one hour in advance of Central Standard Time."... 1499 # I believe that the English legislation [of the old time act] had = 1500 # been assented to (March 22, 1967).... 1501 # Also, as far as I can tell, there was no order-in-council varying 1502 # the time of Daylight Saving Time for 2005 and so the provisions of 1503 # the 1987 version would apply - the changeover was at 2:00 Central 1504 # Standard Time (i.e. not until 3:00 Central Daylight Time). 1505 1506 # From Paul Eggert (2006-04-10): 1507 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1508 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1509 # it was also 02:00s in 1966. 1510 1511 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1512 Rule Winn 1916 only - Apr 23 0:00 1:00 D 1513 Rule Winn 1916 only - Sep 17 0:00 0 S 1514 Rule Winn 1918 only - Apr 14 2:00 1:00 D 1515 Rule Winn 1918 only - Oct 31 2:00 0 S 1516 Rule Winn 1937 only - May 16 2:00 1:00 D 1517 Rule Winn 1937 only - Sep 26 2:00 0 S 1518 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1519 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1520 Rule Winn 1945 only - Sep lastSun 2:00 0 S 1521 Rule Winn 1946 only - May 12 2:00 1:00 D 1522 Rule Winn 1946 only - Oct 13 2:00 0 S 1523 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1524 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1525 Rule Winn 1950 only - May 1 2:00 1:00 D 1526 Rule Winn 1950 only - Sep 30 2:00 0 S 1527 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1528 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1529 Rule Winn 1959 only - Oct lastSun 2:00 0 S 1530 Rule Winn 1960 only - Sep lastSun 2:00 0 S 1531 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1532 Rule Winn 1963 only - Sep 22 2:00 0 S 1533 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1534 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1535 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1536 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1537 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1538 -6:00 Winn C%sT 2006 1539 -6:00 Canada C%sT 1540 1541 1542 # Saskatchewan 1543 1544 # From Mark Brader (2003-07-26): 1545 # The first actual adoption of DST in Canada was at the municipal 1546 # level. As the [Toronto] Star put it (1912-06-07), "While people 1547 # elsewhere have long been talking of legislation to save daylight, 1548 # the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1549 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1550 # presumably late evening, as below), and would run until "the end of 1551 # the summer". The discrepancy between municipal time and railroad 1552 # time was noted. 1553 1554 # From Paul Eggert (2003-07-27): 1555 # Willett (1914-03) notes that DST "has been in operation ... in the 1556 # City of Moose Jaw, Saskatchewan, for one year." 1557 1558 # From Paul Eggert (2006-03-22): 1559 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1560 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1561 # Other western towns (e.g. Lloydminster) are like Edmonton. 1562 # Matthews and Vincent (1998) write that Denare Beach and Creighton 1563 # are like Winnipeg, in violation of Saskatchewan law. 1564 1565 # From W. Jones (1992-11-06): 1566 # The. . .below is based on information I got from our law library, the 1567 # provincial archives, and the provincial Community Services department. 1568 # A precise history would require digging through newspaper archives, and 1569 # since you didn't say what you wanted, I didn't bother. 1570 # 1571 # Saskatchewan is split by a time zone meridian (105W) and over the years 1572 # the boundary became pretty ragged as communities near it reevaluated 1573 # their affiliations in one direction or the other. In 1965 a provincial 1574 # referendum favoured legislating common time practices. 1575 # 1576 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1577 # Saskatchewan 1978) was proclaimed, and established that the eastern 1578 # part of Saskatchewan would use CST year round, that districts in 1579 # northwest Saskatchewan would by default follow CST but could opt to 1580 # follow Mountain Time rules (thus 1 hour difference in the winter and 1581 # zero in the summer), and that districts in southwest Saskatchewan would 1582 # by default follow MT but could opt to follow CST. 1583 # 1584 # It took a few years for the dust to settle (I know one story of a town 1585 # on one time zone having its school in another, such that a mom had to 1586 # serve her family lunch in two shifts), but presently it seems that only 1587 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1588 # rules any more; all other districts appear to have used CST year round 1589 # since sometime in the 1960s. 1590 1591 # From Chris Walton (2006-06-26): 1592 # The Saskatchewan time act which was last updated in 1996 is about 30 pages 1593 # long and rather painful to read. 1594 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1595 1596 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1597 Rule Regina 1918 only - Apr 14 2:00 1:00 D 1598 Rule Regina 1918 only - Oct 31 2:00 0 S 1599 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1600 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1601 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1602 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1603 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1604 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1605 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1606 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1607 Rule Regina 1945 only - Sep lastSun 2:00 0 S 1608 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1609 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1610 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1611 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1612 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1613 Rule Regina 1959 only - Oct lastSun 2:00 0 S 1614 # 1615 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1616 Rule Swift 1957 only - Oct lastSun 2:00 0 S 1617 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1618 Rule Swift 1959 only - Oct lastSun 2:00 0 S 1619 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1620 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1621 Zone America/Regina -6:58:36 - LMT 1905 Sep 1622 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1623 -6:00 - CST 1624 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1625 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1626 -7:00 Regina M%sT 1950 1627 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1628 -6:00 - CST 1629 1630 1631 # Alberta 1632 1633 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1634 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1635 Rule Edm 1918 only - Oct 31 2:00 0 S 1636 Rule Edm 1919 only - May 27 2:00 0 S 1637 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1638 Rule Edm 1920 only - Oct lastSun 2:00 0 S 1639 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1640 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1641 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1642 Rule Edm 1945 only - Sep lastSun 2:00 0 S 1643 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1644 Rule Edm 1947 only - Sep lastSun 2:00 0 S 1645 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1646 Rule Edm 1967 only - Oct lastSun 2:00 0 S 1647 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1648 Rule Edm 1969 only - Oct lastSun 2:00 0 S 1649 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1650 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1651 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1652 Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1653 -7:00 Edm M%sT 1987 1654 -7:00 Canada M%sT 1655 1656 1657 # British Columbia 1658 1659 # From Paul Eggert (2006-03-22): 1660 # Shanks & Pottenger write that since 1970 most of this region has 1661 # been like Vancouver. 1662 # Dawson Creek uses MST. Much of east BC is like Edmonton. 1663 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1664 1665 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1666 Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1667 Rule Vanc 1918 only - Oct 31 2:00 0 S 1668 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1669 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1670 Rule Vanc 1945 only - Sep 30 2:00 0 S 1671 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1672 Rule Vanc 1946 only - Oct 13 2:00 0 S 1673 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1674 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1675 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1676 Zone America/Vancouver -8:12:28 - LMT 1884 1677 -8:00 Vanc P%sT 1987 1678 -8:00 Canada P%sT 1679 Zone America/Dawson_Creek -8:00:56 - LMT 1884 1680 -8:00 Canada P%sT 1947 1681 -8:00 Vanc P%sT 1972 Aug 30 2:00 1682 -7:00 - MST 1683 1684 1685 # Northwest Territories, Nunavut, Yukon 1686 1687 # From Paul Eggert (2006-03-22): 1688 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1689 # Mathew Englander (1996-10-07) gives the following refs: 1690 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1691 # c. 7 defines Yukon standard time as UTC-9. This is still valid; 1692 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1693 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1694 # * O.I.C. 1980/02 established DST. 1695 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1696 # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1697 # with Englander. 1698 # From Chris Walton (2006-06-26): 1699 # Here is a link to the old daylight saving portion of the interpretation 1700 # act which was last updated in 1987: 1701 # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1702 1703 # From Rives McDow (1999-09-04): 1704 # Nunavut ... moved ... to incorporate the whole territory into one time zone. 1705 # <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 1706 # Nunavut moves to single time zone Oct. 31 1707 # </a> 1708 # 1709 # From Antoine Leca (1999-09-06): 1710 # We then need to create a new timezone for the Kitikmeot region of Nunavut 1711 # to differentiate it from the Yellowknife region. 1712 1713 # From Paul Eggert (1999-09-20): 1714 # <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 1715 # Basic Facts: The New Territory 1716 # </a> (1999) reports that Pangnirtung operates on eastern time, 1717 # and that Coral Harbour does not observe DST. We don't know when 1718 # Pangnirtung switched to eastern time; we'll guess 1995. 1719 1720 # From Rives McDow (1999-11-08): 1721 # On October 31, when the rest of Nunavut went to Central time, 1722 # Pangnirtung wobbled. Here is the result of their wobble: 1723 # 1724 # The following businesses and organizations in Pangnirtung use Central Time: 1725 # 1726 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1727 # Eastern Arctic National Parks, A & D Specialist 1728 # 1729 # The following businesses and organizations in Pangnirtung use Eastern Time: 1730 # 1731 # Hamlet office, All other businesses, Both schools, Airport operator 1732 # 1733 # This has made for an interesting situation there, which warranted the news. 1734 # No one there that I spoke with seems concerned, or has plans to 1735 # change the local methods of keeping time, as it evidently does not 1736 # really interfere with any activities or make things difficult locally. 1737 # They plan to celebrate New Year's turn-over twice, one hour apart, 1738 # so it appears that the situation will last at least that long. 1739 # The Nunavut Intergovernmental Affairs hopes that they will "come to 1740 # their senses", but the locals evidently don't see any problem with 1741 # the current state of affairs. 1742 1743 # From Michaela Rodrigue, writing in the 1744 # <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 1745 # Nunatsiaq News (1999-11-19)</a>: 1746 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1747 # central - or Nunavut time - for government offices, and eastern time 1748 # for municipal offices and schools.... Igloolik [was similar but then] 1749 # made the switch to central time on Saturday, Nov. 6. 1750 1751 # From Paul Eggert (2000-10-02): 1752 # Matthews and Vincent (1998) say the following, but we lack histories 1753 # for these potential new Zones. 1754 # 1755 # The Canadian Forces station at Alert uses Eastern Time while the 1756 # handful of residents at the Eureka weather station [in the Central 1757 # zone] skip daylight savings. Baffin Island, which is crossed by the 1758 # Central, Eastern and Atlantic Time zones only uses Eastern Time. 1759 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 1760 # Central Time and Southampton Island [in the Central zone] is not 1761 # required to use daylight savings. 1762 1763 # From 1764 # <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 1765 # Nunavut now has two time zones 1766 # </a> (2000-11-10): 1767 # The Nunavut government would allow its employees in Kugluktuk and 1768 # Cambridge Bay to operate on central time year-round, putting them 1769 # one hour behind the rest of Nunavut for six months during the winter. 1770 # At the end of October the two communities had rebelled against 1771 # Nunavut's unified time zone, refusing to shift to eastern time with 1772 # the rest of the territory for the winter. Cambridge Bay remained on 1773 # central time, while Kugluktuk, even farther west, reverted to 1774 # mountain time, which they had used before the advent of Nunavut's 1775 # unified time zone in 1999. 1776 # 1777 # From Rives McDow (2001-01-20), quoting the Nunavut government: 1778 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 1779 1780 # From Paul Eggert (2000-12-04): 1781 # Let's just keep track of the official times for now. 1782 1783 # From Rives McDow (2001-03-07): 1784 # The premier of Nunavut has issued a ministerial statement advising 1785 # that effective 2001-04-01, the territory of Nunavut will revert 1786 # back to three time zones (mountain, central, and eastern). Of the 1787 # cities in Nunavut, Coral Harbor is the only one that I know of that 1788 # has said it will not observe dst, staying on EST year round. I'm 1789 # checking for more info, and will get back to you if I come up with 1790 # more. 1791 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 1792 1793 # From Gwillim Law (2005-05-21): 1794 # According to maps at 1795 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1796 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1797 # (both dated 2003), and 1798 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1799 # (from a 1998 Canadian Geographic article), the de facto and de jure time 1800 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1801 # round. Using Google, it's easy to find other websites that confirm this. 1802 # I wasn't able to find how far back this time regimen goes, but since it 1803 # predates the creation of Nunavut, it probably goes back many years.... 1804 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1805 # 1806 # From Paul Eggert (2005-07-26): 1807 # For lack of better information, assume that Southampton Island observed 1808 # daylight saving only during wartime. 1809 1810 # From Chris Walton (2007-03-01): 1811 # ... the community of Resolute (located on Cornwallis Island in 1812 # Nunavut) moved from Central Time to Eastern Time last November. 1813 # Basically the community did not change its clocks at the end of 1814 # daylight saving.... 1815 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 1816 1817 # From Chris Walton (2007-03-14): 1818 # Today I phoned the "hamlet office" to find out what Resolute was doing with 1819 # its clocks. 1820 # 1821 # The individual that answered the phone confirmed that the clocks did not 1822 # move at the end of daylight saving on October 29/2006. He also told me that 1823 # the clocks did not move this past weekend (March 11/2007).... 1824 1825 # From Chris Walton (2008-11-13): 1826 # ...the residents of Resolute believe that they are changing "time zones" 1827 # twice a year. In winter months, local time is qualified with "Eastern 1828 # Time" which is really "Eastern Standard Time (UTC-5)". In summer 1829 # months, local time is qualified with "Central Time" which is really 1830 # "Central Daylight Time (UTC-5)"... 1831 1832 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1833 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 1834 Rule NT_YK 1918 only - Oct 27 2:00 0 S 1835 Rule NT_YK 1919 only - May 25 2:00 1:00 D 1836 Rule NT_YK 1919 only - Nov 1 0:00 0 S 1837 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1838 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 1839 Rule NT_YK 1945 only - Sep 30 2:00 0 S 1840 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 1841 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 1842 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 1843 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 1844 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 1845 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1846 # aka Panniqtuuq 1847 Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 1848 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 1849 -5:00 Canada E%sT 1999 Oct 31 2:00 1850 -6:00 Canada C%sT 2000 Oct 29 2:00 1851 -5:00 Canada E%sT 1852 # formerly Frobisher Bay 1853 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 1854 -5:00 NT_YK E%sT 1999 Oct 31 2:00 1855 -6:00 Canada C%sT 2000 Oct 29 2:00 1856 -5:00 Canada E%sT 1857 # aka Qausuittuq 1858 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1859 Rule Resolute 2006 max - Nov Sun>=1 2:00 0 ES 1860 Rule Resolute 2007 max - Mar Sun>=8 2:00 0 CD 1861 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 1862 -6:00 NT_YK C%sT 2000 Oct 29 2:00 1863 -5:00 - EST 2001 Apr 1 3:00 1864 -6:00 Canada C%sT 2006 Oct 29 2:00 1865 -5:00 Resolute %sT 1866 # aka Kangiqiniq 1867 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 1868 -6:00 NT_YK C%sT 2000 Oct 29 2:00 1869 -5:00 - EST 2001 Apr 1 3:00 1870 -6:00 Canada C%sT 1871 # aka Iqaluktuuttiaq 1872 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 1873 -7:00 NT_YK M%sT 1999 Oct 31 2:00 1874 -6:00 Canada C%sT 2000 Oct 29 2:00 1875 -5:00 - EST 2000 Nov 5 0:00 1876 -6:00 - CST 2001 Apr 1 3:00 1877 -7:00 Canada M%sT 1878 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 1879 -7:00 NT_YK M%sT 1980 1880 -7:00 Canada M%sT 1881 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 1882 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 1883 -7:00 NT_YK M%sT 1980 1884 -7:00 Canada M%sT 1885 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 1886 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 1887 -8:00 NT_YK P%sT 1980 1888 -8:00 Canada P%sT 1889 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 1890 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 1891 -8:00 NT_YK P%sT 1980 1892 -8:00 Canada P%sT 1893 1894 1895 ############################################################################### 1896 1897 # Mexico 1898 1899 # From Paul Eggert (2001-03-05): 1900 # The Investigation and Analysis Service of the 1901 # Mexican Library of Congress (MLoC) has published a 1902 # <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 1903 # history of Mexican local time (in Spanish) 1904 # </a>. 1905 # 1906 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 1907 # (In all cases we go with the MLoC.) 1908 # S&P report that Baja was at -8:00 in 1922/1923. 1909 # S&P say the 1930 transition in Baja was 1930-11-16. 1910 # S&P report no DST during summer 1931. 1911 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 1912 1913 # From Gwillim Law (2001-02-20): 1914 # There are some other discrepancies between the Decrees page and the 1915 # tz database. I think they can best be explained by supposing that 1916 # the researchers who prepared the Decrees page failed to find some of 1917 # the relevant documents. 1918 1919 # From Alan Perry (1996-02-15): 1920 # A guy from our Mexico subsidiary finally found the Presidential Decree 1921 # outlining the timezone changes in Mexico. 1922 # 1923 # ------------- Begin Forwarded Message ------------- 1924 # 1925 # I finally got my hands on the Official Presidential Decree that sets up the 1926 # rules for the DST changes. The rules are: 1927 # 1928 # 1. The country is divided in 3 timezones: 1929 # - Baja California Norte (the Mexico/BajaNorte TZ) 1930 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 1931 # - The rest of the country (the Mexico/General TZ) 1932 # 1933 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 1934 # at 2:00 AM, the times in each zone are as follows: 1935 # BajaNorte: GMT+7 1936 # BajaSur: GMT+6 1937 # General: GMT+5 1938 # 1939 # 3. The rest of the year, the times are as follows: 1940 # BajaNorte: GMT+8 1941 # BajaSur: GMT+7 1942 # General: GMT+6 1943 # 1944 # The Decree was published in Mexico's Official Newspaper on January 4th. 1945 # 1946 # -------------- End Forwarded Message -------------- 1947 # From Paul Eggert (1996-06-12): 1948 # For an English translation of the decree, see 1949 # <a href="http://mexico-travel.com/extra/timezone_eng.html"> 1950 # ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 1951 # </a> 1952 1953 # From Rives McDow (1998-10-08): 1954 # The State of Quintana Roo has reverted back to central STD and DST times 1955 # (i.e. UTC -0600 and -0500 as of 1998-08-02). 1956 1957 # From Rives McDow (2000-01-10): 1958 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 1959 # zone 5 hours from the International Date Line, and will not observe daylight 1960 # savings time so as to stay on the same time zone as the southern part of 1961 # Arizona year round. 1962 1963 # From Jesper Norgaard, translating 1964 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 1965 # In Oaxaca, the 55.000 teachers from the Section 22 of the National 1966 # Syndicate of Education Workers, refuse to apply daylight saving each 1967 # year, so that the more than 10,000 schools work at normal hour the 1968 # whole year. 1969 1970 # From Gwillim Law (2001-01-19): 1971 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 1972 # (translated):... 1973 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 1974 # that Summer Time will be reduced from seven to five months, starting 1975 # this year.... 1976 # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 1977 # [translated], says "summer time will ... take effect on the first Sunday 1978 # in May, and end on the last Sunday of September. 1979 1980 # From Arthur David Olson (2001-01-25): 1981 # The 2001-01-24 traditional Washington Post contained the page one 1982 # story "Timely Issue Divides Mexicans."... 1983 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 1984 # ... Mexico City Mayor Lopez Obrador "...is threatening to keep 1985 # Mexico City and its 20 million residents on a different time than 1986 # the rest of the country..." In particular, Lopez Obrador would abolish 1987 # observation of Daylight Saving Time. 1988 1989 # <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 1990 # Official statute published by the Energy Department 1991 # </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 1992 # and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 1993 1994 # From Paul Eggert (2001-03-03): 1995 # 1996 # <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 1997 # James F. Smith writes in today's LA Times 1998 # </a> 1999 # * Sonora will continue to observe standard time. 2000 # * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 2001 # the Federal District will not adopt DST. 2002 # * 4 of 16 district leaders announced they'll ignore the decree. 2003 # * The decree does not affect federal-controlled facilities including 2004 # the airport, banks, hospitals, and schools. 2005 # 2006 # For now we'll assume that the Federal District will bow to federal rules. 2007 2008 # From Jesper Norgaard (2001-04-01): 2009 # I found some references to the Mexican application of daylight 2010 # saving, which modifies what I had already sent you, stating earlier 2011 # that a number of northern Mexican states would go on daylight 2012 # saving. The modification reverts this to only cover Baja California 2013 # (Norte), while all other states (except Sonora, who has no daylight 2014 # saving all year) will follow the original decree of president 2015 # Vicente Fox, starting daylight saving May 6, 2001 and ending 2016 # September 30, 2001. 2017 # References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 2018 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2019 2020 # From Reuters (2001-09-04): 2021 # Mexico's Supreme Court on Tuesday declared that daylight savings was 2022 # unconstitutional in Mexico City, creating the possibility the 2023 # capital will be in a different time zone from the rest of the nation 2024 # next year.... The Supreme Court's ruling takes effect at 2:00 2025 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2026 # standard time. "This is so residents of the Federal District are not 2027 # subject to unexpected time changes," a statement from the court said. 2028 2029 # From Jesper Norgaard Welen (2002-03-12): 2030 # ... consulting my local grocery store(!) and my coworkers, they all insisted 2031 # that a new decision had been made to reinstate US style DST in Mexico.... 2032 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2033 # confirms this. Sonora as usual is the only state where DST is not applied. 2034 2035 # From Steffen Thorsen (2009-12-28): 2036 # 2037 # Steffen Thorsen wrote: 2038 # > Mexico's House of Representatives has approved a proposal for northern 2039 # > Mexico's border cities to share the same daylight saving schedule as 2040 # > the United States. 2041 # Now this has passed both the Congress and the Senate, so starting from 2042 # 2010, some border regions will be the same: 2043 # <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2044 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2045 # </a> 2046 # <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2047 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2048 # </a> 2049 # (Spanish) 2050 # 2051 # Could not find the new law text, but the proposed law text changes are here: 2052 # <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2053 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2054 # </a> 2055 # (Gaceta Parlamentaria) 2056 # 2057 # There is also a list of the votes here: 2058 # <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2059 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2060 # </a> 2061 # 2062 # Our page: 2063 # <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2064 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2065 # </a> 2066 2067 # From Arthur David Olson (2010-01-20): 2068 # The page 2069 # <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2070 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2071 # </a> 2072 # includes this text: 2073 # En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2074 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2075 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2076 # Tamaulipas, la aplicación de este horario estacional surtirá efecto 2077 # desde las dos horas del segundo domingo de marzo y concluirá a las dos 2078 # horas del primer domingo de noviembre. 2079 # En los municipios fronterizos que se encuentren ubicados en la franja 2080 # fronteriza norte en el territorio comprendido entre la línea 2081 # internacional y la línea paralela ubicada a una distancia de veinte 2082 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2083 # interior del país, la aplicación de este horario estacional surtirá 2084 # efecto desde las dos horas del segundo domingo de marzo y concluirá a 2085 # las dos horas del primer domingo de noviembre. 2086 2087 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2088 Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2089 Rule Mexico 1939 only - Jun 25 0:00 0 S 2090 Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2091 Rule Mexico 1941 only - Apr 1 0:00 0 S 2092 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2093 Rule Mexico 1944 only - May 1 0:00 0 S 2094 Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2095 Rule Mexico 1950 only - Jul 30 0:00 0 S 2096 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2097 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2098 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2099 Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2100 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2101 Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2102 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2103 # Quintana Roo 2104 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2105 -6:00 - CST 1981 Dec 23 2106 -5:00 Mexico E%sT 1998 Aug 2 2:00 2107 -6:00 Mexico C%sT 2108 # Campeche, Yucatan 2109 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2110 -6:00 - CST 1981 Dec 23 2111 -5:00 - EST 1982 Dec 2 2112 -6:00 Mexico C%sT 2113 # Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2114 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2115 -6:00 - CST 1988 2116 -6:00 US C%sT 1989 2117 -6:00 Mexico C%sT 2010 2118 -6:00 US C%sT 2119 # Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 2120 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2121 -6:00 - CST 1988 2122 -6:00 US C%sT 1989 2123 -6:00 Mexico C%sT 2124 # Central Mexico 2125 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2126 -7:00 - MST 1927 Jun 10 23:00 2127 -6:00 - CST 1930 Nov 15 2128 -7:00 - MST 1931 May 1 23:00 2129 -6:00 - CST 1931 Oct 2130 -7:00 - MST 1932 Apr 1 2131 -6:00 Mexico C%sT 2001 Sep 30 02:00 2132 -6:00 - CST 2002 Feb 20 2133 -6:00 Mexico C%sT 2134 # Chihuahua (near US border) 2135 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2136 -7:00 - MST 1927 Jun 10 23:00 2137 -6:00 - CST 1930 Nov 15 2138 -7:00 - MST 1931 May 1 23:00 2139 -6:00 - CST 1931 Oct 2140 -7:00 - MST 1932 Apr 1 2141 -6:00 - CST 1996 2142 -6:00 Mexico C%sT 1998 2143 -6:00 - CST 1998 Apr Sun>=1 3:00 2144 -7:00 Mexico M%sT 2010 2145 -7:00 US M%sT 2146 # Chihuahua (away from US border) 2147 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2148 -7:00 - MST 1927 Jun 10 23:00 2149 -6:00 - CST 1930 Nov 15 2150 -7:00 - MST 1931 May 1 23:00 2151 -6:00 - CST 1931 Oct 2152 -7:00 - MST 1932 Apr 1 2153 -6:00 - CST 1996 2154 -6:00 Mexico C%sT 1998 2155 -6:00 - CST 1998 Apr Sun>=1 3:00 2156 -7:00 Mexico M%sT 2157 # Sonora 2158 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2159 -7:00 - MST 1927 Jun 10 23:00 2160 -6:00 - CST 1930 Nov 15 2161 -7:00 - MST 1931 May 1 23:00 2162 -6:00 - CST 1931 Oct 2163 -7:00 - MST 1932 Apr 1 2164 -6:00 - CST 1942 Apr 24 2165 -7:00 - MST 1949 Jan 14 2166 -8:00 - PST 1970 2167 -7:00 Mexico M%sT 1999 2168 -7:00 - MST 2169 2170 # From Alexander Krivenyshev (2010-04-21): 2171 # According to news, Bahía de Banderas (Mexican state of Nayarit) 2172 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2173 # share the same time zone as nearby city Puerto Vallarta, Jalisco). 2174 # 2175 # (Spanish) 2176 # Bahía de Banderas homologa su horario al del centro del 2177 # país, a partir de este domingo 2178 # <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2179 # http://www.nayarit.gob.mx/notes.asp?id=20748 2180 # </a> 2181 # 2182 # Bahía de Banderas homologa su horario con el del Centro del 2183 # País 2184 # <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"> 2185 # 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" 2186 # </a> 2187 # 2188 # (English) 2189 # Puerto Vallarta and Bahía de Banderas: One Time Zone 2190 # <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2191 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2192 # </a> 2193 # 2194 # or 2195 # <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2196 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2197 # </a> 2198 # 2199 # "Mexico's Senate approved the amendments to the Mexican Schedule System that 2200 # will allow Bahía de Banderas and Puerto Vallarta to share the same time 2201 # zone ..." 2202 # Baja California Sur, Nayarit, Sinaloa 2203 2204 # From Arthur David Olson (2010-05-01): 2205 # Use "Bahia_Banderas" to keep the name to fourteen characters. 2206 2207 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2208 -7:00 - MST 1927 Jun 10 23:00 2209 -6:00 - CST 1930 Nov 15 2210 -7:00 - MST 1931 May 1 23:00 2211 -6:00 - CST 1931 Oct 2212 -7:00 - MST 1932 Apr 1 2213 -6:00 - CST 1942 Apr 24 2214 -7:00 - MST 1949 Jan 14 2215 -8:00 - PST 1970 2216 -7:00 Mexico M%sT 2217 2218 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2219 -7:00 - MST 1927 Jun 10 23:00 2220 -6:00 - CST 1930 Nov 15 2221 -7:00 - MST 1931 May 1 23:00 2222 -6:00 - CST 1931 Oct 2223 -7:00 - MST 1932 Apr 1 2224 -6:00 - CST 1942 Apr 24 2225 -7:00 - MST 1949 Jan 14 2226 -8:00 - PST 1970 2227 -7:00 Mexico M%sT 2010 Apr 4 2:00 2228 -6:00 Mexico C%sT 2229 2230 # Baja California (near US border) 2231 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2232 -7:00 - MST 1924 2233 -8:00 - PST 1927 Jun 10 23:00 2234 -7:00 - MST 1930 Nov 15 2235 -8:00 - PST 1931 Apr 1 2236 -8:00 1:00 PDT 1931 Sep 30 2237 -8:00 - PST 1942 Apr 24 2238 -8:00 1:00 PWT 1945 Aug 14 23:00u 2239 -8:00 1:00 PPT 1945 Nov 12 # Peace 2240 -8:00 - PST 1948 Apr 5 2241 -8:00 1:00 PDT 1949 Jan 14 2242 -8:00 - PST 1954 2243 -8:00 CA P%sT 1961 2244 -8:00 - PST 1976 2245 -8:00 US P%sT 1996 2246 -8:00 Mexico P%sT 2001 2247 -8:00 US P%sT 2002 Feb 20 2248 -8:00 Mexico P%sT 2010 2249 -8:00 US P%sT 2250 # Baja California (away from US border) 2251 Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2252 -7:00 - MST 1924 2253 -8:00 - PST 1927 Jun 10 23:00 2254 -7:00 - MST 1930 Nov 15 2255 -8:00 - PST 1931 Apr 1 2256 -8:00 1:00 PDT 1931 Sep 30 2257 -8:00 - PST 1942 Apr 24 2258 -8:00 1:00 PWT 1945 Aug 14 23:00u 2259 -8:00 1:00 PPT 1945 Nov 12 # Peace 2260 -8:00 - PST 1948 Apr 5 2261 -8:00 1:00 PDT 1949 Jan 14 2262 -8:00 - PST 1954 2263 -8:00 CA P%sT 1961 2264 -8:00 - PST 1976 2265 -8:00 US P%sT 1996 2266 -8:00 Mexico P%sT 2001 2267 -8:00 US P%sT 2002 Feb 20 2268 -8:00 Mexico P%sT 2269 # From Paul Eggert (2006-03-22): 2270 # Formerly there was an America/Ensenada zone, which differed from 2271 # America/Tijuana only in that it did not observe DST from 1976 2272 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2273 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2274 # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2275 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2276 # DST-observance was a town-by-town matter back then. This concerns 2277 # data after 1970 so most likely there should be at least one Zone 2278 # other than America/Tijuana for Baja, but it's not clear yet what its 2279 # name or contents should be. 2280 # 2281 # Revillagigedo Is 2282 # no information 2283 2284 ############################################################################### 2285 2286 # Anguilla 2287 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2288 Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 2289 -4:00 - AST 2290 2291 # Antigua and Barbuda 2292 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2293 Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2294 -5:00 - EST 1951 2295 -4:00 - AST 2296 2297 # Bahamas 2298 # 2299 # From Sue Williams (2006-12-07): 2300 # The Bahamas announced about a month ago that they plan to change their DST 2301 # rules to sync with the U.S. starting in 2007.... 2302 # http://www.jonesbahamas.com/?c=45&a=10412 2303 2304 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2305 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2306 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2307 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2308 Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 2309 -5:00 Bahamas E%sT 1976 2310 -5:00 US E%sT 2311 2312 # Barbados 2313 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2314 Rule Barb 1977 only - Jun 12 2:00 1:00 D 2315 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2316 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2317 Rule Barb 1979 only - Sep 30 2:00 0 S 2318 Rule Barb 1980 only - Sep 25 2:00 0 S 2319 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2320 Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 2321 -3:58:28 - BMT 1932 # Bridgetown Mean Time 2322 -4:00 Barb A%sT 2323 2324 # Belize 2325 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2326 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2327 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2328 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2329 Rule Belize 1973 only - Dec 5 0:00 1:00 D 2330 Rule Belize 1974 only - Feb 9 0:00 0 S 2331 Rule Belize 1982 only - Dec 18 0:00 1:00 D 2332 Rule Belize 1983 only - Feb 12 0:00 0 S 2333 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2334 Zone America/Belize -5:52:48 - LMT 1912 Apr 2335 -6:00 Belize C%sT 2336 2337 # Bermuda 2338 2339 # From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2340 2341 # Next year, however, clocks in the US will go forward on the second Sunday 2342 # in March, until the first Sunday in November. And, after the Time Zone 2343 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2344 # Friday, the same thing will happen in Bermuda. 2345 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2346 2347 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2348 Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 2349 -4:00 - AST 1974 Apr 28 2:00 2350 -4:00 Bahamas A%sT 1976 2351 -4:00 US A%sT 2352 2353 # Cayman Is 2354 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2355 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2356 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2357 -5:00 - EST 2358 2359 # Costa Rica 2360 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2361 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2362 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2363 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2364 # IATA SSIM (1991-09) says the following was at 1:00; 2365 # go with Shanks & Pottenger. 2366 Rule CR 1991 only - Jul 1 0:00 0 S 2367 Rule CR 1992 only - Mar 15 0:00 0 S 2368 # There are too many San Joses elsewhere, so we'll use `Costa Rica'. 2369 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2370 Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 2371 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 2372 -6:00 CR C%sT 2373 # Coco 2374 # no information; probably like America/Costa_Rica 2375 2376 # Cuba 2377 2378 # From Arthur David Olson (1999-03-29): 2379 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2380 # the Cuban National Team and the Baltimore Orioles was carried live on 2381 # the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2382 # During the game, play-by-play announcer Jim Hunter noted that 2383 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2384 # Time today." (The "two hour" remark referred to losing one hour of 2385 # sleep on 1999-03-28--when the announcers were in Cuba as it switched 2386 # to DST--and one more hour on 1999-04-04--when the announcers will have 2387 # returned to Baltimore, which switches on that date.) 2388 2389 # From Evert van der Veer via Steffen Thorsen (2004-10-28): 2390 # Cuba is not going back to standard time this year. 2391 # From Paul Eggert (2006-03-22): 2392 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2393 # says that it's due to a problem at the Antonio Guiteras 2394 # thermoelectric plant, and says "This October there will be no return 2395 # to normal hours (after daylight saving time)". 2396 # For now, let's assume that it's a temporary measure. 2397 2398 # From Carlos A. Carnero Delgado (2005-11-12): 2399 # This year (just like in 2004-2005) there's no change in time zone 2400 # adjustment in Cuba. We will stay in daylight saving time: 2401 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2402 2403 # From Jesper Norgaard Welen (2006-10-21): 2404 # An article in GRANMA INTERNACIONAL claims that Cuba will end 2405 # the 3 years of permanent DST next weekend, see 2406 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2407 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2408 # watches should be set back one hour -- going back to 00:00 hours -- returning 2409 # to the normal schedule.... 2410 2411 # From Paul Eggert (2007-03-02): 2412 # http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2413 # says Cuban clocks will advance at midnight on March 10. 2414 # For lack of better information, assume Cuba will use US rules, 2415 # except that it switches at midnight standard time as usual. 2416 # 2417 # From Steffen Thorsen (2007-10-25): 2418 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2419 # earlier - on the last Sunday of October, just like in 2006. 2420 # 2421 # He supplied these references: 2422 # 2423 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2424 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2425 # 2426 # From Alex Kryvenishev (2007-10-25): 2427 # Here is also article from Granma (Cuba): 2428 # 2429 # [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2430 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2431 # 2432 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2433 2434 # From Arthur David Olson (2008-03-09): 2435 # I'm in Maryland which is now observing United States Eastern Daylight 2436 # Time. At 9:44 local time I used RealPlayer to listen to 2437 # <a href="http://media.enet.cu/radioreloj"> 2438 # http://media.enet.cu/radioreloj 2439 # </a>, a Cuban information station, and heard 2440 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2441 # indicating that Cuba is still on standard time. 2442 2443 # From Steffen Thorsen (2008-03-12): 2444 # It seems that Cuba will start DST on Sunday, 2007-03-16... 2445 # It was announced yesterday, according to this source (in Spanish): 2446 # <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2447 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2448 # </a> 2449 # 2450 # Some more background information is posted here: 2451 # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2452 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2453 # </a> 2454 # 2455 # The article also says that Cuba has been observing DST since 1963, 2456 # while Shanks (and tzdata) has 1965 as the first date (except in the 2457 # 1940's). Many other web pages in Cuba also claim that it has been 2458 # observed since 1963, but with the exception of 1970 - an exception 2459 # which is not present in tzdata/Shanks. So there is a chance we need to 2460 # change some historic records as well. 2461 # 2462 # One example: 2463 # <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2464 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2465 # </a> 2466 2467 # From Jesper Norgaard Welen (2008-03-13): 2468 # The Cuban time change has just been confirmed on the most authoritative 2469 # web site, the Granma. Please check out 2470 # <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2471 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2472 # </a> 2473 # 2474 # Basically as expected after Steffen Thorsens information, the change 2475 # will take place midnight between Saturday and Sunday. 2476 2477 # From Arthur David Olson (2008-03-12): 2478 # Assume Sun>=15 (third Sunday) going forward. 2479 2480 # From Alexander Krivenyshev (2009-03-04) 2481 # According to the Radio Reloj - Cuba will start Daylight Saving Time on 2482 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2483 # not on midnight March 14 / March 15 as previously thought. 2484 # 2485 # <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2486 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2487 # (in Spanish) 2488 # </a> 2489 2490 # From Arthur David Olson (2009-03-09) 2491 # I listened over the Internet to 2492 # <a href="http://media.enet.cu/readioreloj"> 2493 # http://media.enet.cu/readioreloj 2494 # </a> 2495 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2496 # the time was announced as "diez cinco"--the same time as here, indicating 2497 # that has indeed switched to DST. Assume second Sunday from 2009 forward. 2498 2499 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2500 Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2501 Rule Cuba 1928 only - Oct 10 0:00 0 S 2502 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2503 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2504 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2505 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2506 Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2507 Rule Cuba 1965 only - Sep 30 0:00 0 S 2508 Rule Cuba 1966 only - May 29 0:00 1:00 D 2509 Rule Cuba 1966 only - Oct 2 0:00 0 S 2510 Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2511 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2512 Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2513 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2514 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2515 Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2516 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2517 Rule Cuba 1978 only - May 7 0:00 1:00 D 2518 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2519 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2520 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2521 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2522 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2523 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2524 Rule Cuba 1996 only - Oct 6 0:00s 0 S 2525 Rule Cuba 1997 only - Oct 12 0:00s 0 S 2526 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2527 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2528 Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D 2529 Rule Cuba 2006 max - Oct lastSun 0:00s 0 S 2530 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2531 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2532 Rule Cuba 2009 max - Mar Sun>=8 0:00s 1:00 D 2533 2534 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2535 Zone America/Havana -5:29:28 - LMT 1890 2536 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2537 -5:00 Cuba C%sT 2538 2539 # Dominica 2540 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2541 Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 2542 -4:00 - AST 2543 2544 # Dominican Republic 2545 2546 # From Steffen Thorsen (2000-10-30): 2547 # Enrique Morales reported to me that the Dominican Republic has changed the 2548 # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2549 # http://www.listin.com.do/antes/261000/republica/princi.html 2550 2551 # From Paul Eggert (2000-12-04): 2552 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2553 2554 # From Rives McDow (2000-12-01): 2555 # Dominican Republic changed its mind and presidential decree on Tuesday, 2556 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2557 # Dominican Republic will be reverting to 8 hours from the International Date 2558 # Line, and will not be using DST in the foreseeable future. The reason they 2559 # decided to use DST was to be in synch with Puerto Rico, who was also going 2560 # to implement DST. When Puerto Rico didn't implement DST, the president 2561 # decided to revert. 2562 2563 2564 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2565 Rule DR 1966 only - Oct 30 0:00 1:00 D 2566 Rule DR 1967 only - Feb 28 0:00 0 S 2567 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2568 Rule DR 1970 only - Feb 21 0:00 0 S 2569 Rule DR 1971 only - Jan 20 0:00 0 S 2570 Rule DR 1972 1974 - Jan 21 0:00 0 S 2571 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2572 Zone America/Santo_Domingo -4:39:36 - LMT 1890 2573 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2574 -5:00 DR E%sT 1974 Oct 27 2575 -4:00 - AST 2000 Oct 29 02:00 2576 -5:00 US E%sT 2000 Dec 3 01:00 2577 -4:00 - AST 2578 2579 # El Salvador 2580 2581 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2582 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2583 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2584 # There are too many San Salvadors elsewhere, so use America/El_Salvador 2585 # instead of America/San_Salvador. 2586 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2587 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2588 -6:00 Salv C%sT 2589 2590 # Grenada 2591 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2592 Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 2593 -4:00 - AST 2594 2595 # Guadeloupe 2596 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2597 Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 2598 -4:00 - AST 2599 # St Barthelemy 2600 Link America/Guadeloupe America/St_Barthelemy 2601 # St Martin (French part) 2602 Link America/Guadeloupe America/Marigot 2603 2604 # Guatemala 2605 # 2606 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2607 # Diario Co Latino, at 2608 # http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2609 # says in an article dated 2006-04-19 that the Guatemalan government had 2610 # decided on that date to advance official time by 60 minutes, to lessen the 2611 # impact of the elevated cost of oil.... Daylight saving time will last from 2612 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2613 # From Paul Eggert (2006-06-22): 2614 # The Ministry of Energy and Mines, press release CP-15/2006 2615 # (2006-04-19), says DST ends at 24:00. See 2616 # <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2617 2618 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2619 Rule Guat 1973 only - Nov 25 0:00 1:00 D 2620 Rule Guat 1974 only - Feb 24 0:00 0 S 2621 Rule Guat 1983 only - May 21 0:00 1:00 D 2622 Rule Guat 1983 only - Sep 22 0:00 0 S 2623 Rule Guat 1991 only - Mar 23 0:00 1:00 D 2624 Rule Guat 1991 only - Sep 7 0:00 0 S 2625 Rule Guat 2006 only - Apr 30 0:00 1:00 D 2626 Rule Guat 2006 only - Oct 1 0:00 0 S 2627 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2628 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2629 -6:00 Guat C%sT 2630 2631 # Haiti 2632 # From Gwillim Law (2005-04-15): 2633 # Risto O. Nykanen wrote me that Haiti is now on DST. 2634 # I searched for confirmation, and I found a 2635 # <a href="http://www.haitianconsulate.org/time.doc"> press release 2636 # on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2637 # </a>. Translated from French, it says: 2638 # 2639 # "The Prime Minister's Communication Office notifies the public in general 2640 # and the press in particular that, following a decision of the Interior 2641 # Ministry and the Territorial Collectivities [I suppose that means the 2642 # provinces], Haiti will move to Eastern Daylight Time in the night from next 2643 # Saturday the 2nd to Sunday the 3rd. 2644 # 2645 # "Consequently, the Prime Minister's Communication Office wishes to inform 2646 # the population that the country's clocks will be set forward one hour 2647 # starting at midnight. This provision will hold until the last Saturday in 2648 # October 2005. 2649 # 2650 # "Port-au-Prince, March 31, 2005" 2651 # 2652 # From Steffen Thorsen (2006-04-04): 2653 # I have been informed by users that Haiti observes DST this year like 2654 # last year, so the current "only" rule for 2005 might be changed to a 2655 # "max" rule or to last until 2006. (Who knows if they will observe DST 2656 # next year or if they will extend their DST like US/Canada next year). 2657 # 2658 # I have found this article about it (in French): 2659 # http://www.haitipressnetwork.com/news.cfm?articleID=7612 2660 # 2661 # The reason seems to be an energy crisis. 2662 2663 # From Stephen Colebourne (2007-02-22): 2664 # Some IATA info: Haiti won't be having DST in 2007. 2665 2666 2667 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2668 Rule Haiti 1983 only - May 8 0:00 1:00 D 2669 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 2670 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2671 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2672 # Go with IATA. 2673 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 2674 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2675 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2676 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 2677 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2678 Zone America/Port-au-Prince -4:49:20 - LMT 1890 2679 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 2680 -5:00 Haiti E%sT 2681 2682 # Honduras 2683 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2684 2685 # From Paul Eggert (2006-05-05): 2686 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2687 # saying Honduras will start using DST midnight Saturday, effective 4 2688 # months until September. La Tribuna reported today 2689 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2690 # of Honduras, refused to back down on this. 2691 2692 # From Jesper Norgaard Welen (2006-08-08): 2693 # It seems that Honduras has returned from DST to standard time this Monday at 2694 # 00:00 hours (prolonging Sunday to 25 hours duration). 2695 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2696 2697 # From Paul Eggert (2006-08-08): 2698 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 2699 # <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 2700 # It mentions executive decree 18-2006. 2701 2702 # From Steffen Thorsen (2006-08-17): 2703 # Honduras will observe DST from 2007 to 2009, exact dates are not 2704 # published, I have located this authoritative source: 2705 # http://www.presidencia.gob.hn/noticia.aspx?nId=47 2706 2707 # From Steffen Thorsen (2007-03-30): 2708 # http://www.laprensahn.com/pais_nota.php?id04962=7386 2709 # So it seems that Honduras will not enter DST this year.... 2710 2711 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2712 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2713 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 2714 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 2715 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 2716 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2717 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 2718 -6:00 Hond C%sT 2719 # 2720 # Great Swan I ceded by US to Honduras in 1972 2721 2722 # Jamaica 2723 2724 # From Bob Devine (1988-01-28): 2725 # Follows US rules. 2726 2727 # From U. S. Naval Observatory (1989-01-19): 2728 # JAMAICA 5 H BEHIND UTC 2729 2730 # From Shanks & Pottenger: 2731 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2732 Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston 2733 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2734 -5:00 - EST 1974 Apr 28 2:00 2735 -5:00 US E%sT 1984 2736 -5:00 - EST 2737 2738 # Martinique 2739 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2740 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 2741 -4:04:20 - FFMT 1911 May # Fort-de-France MT 2742 -4:00 - AST 1980 Apr 6 2743 -4:00 1:00 ADT 1980 Sep 28 2744 -4:00 - AST 2745 2746 # Montserrat 2747 # From Paul Eggert (2006-03-22): 2748 # In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 2749 # world.gazetteer.com says Cork Hill is the most populous location now. 2750 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2751 Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 2752 -4:00 - AST 2753 2754 # Nicaragua 2755 # 2756 # This uses Shanks & Pottenger for times before 2005. 2757 # 2758 # From Steffen Thorsen (2005-04-12): 2759 # I've got reports from 8 different people that Nicaragua just started 2760 # DST on Sunday 2005-04-10, in order to save energy because of 2761 # expensive petroleum. The exact end date for DST is not yet 2762 # announced, only "September" but some sites also say "mid-September". 2763 # Some background information is available on the President's official site: 2764 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 2765 # The Decree, no 23-2005 is available here: 2766 # 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 2767 # 2768 # From Paul Eggert (2005-05-01): 2769 # The decree doesn't say anything about daylight saving, but for now let's 2770 # assume that it is daylight saving.... 2771 # 2772 # From Gwillim Law (2005-04-21): 2773 # The Associated Press story on the time change, which can be found at 2774 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 2775 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last 2776 # time that a change of clocks was applied to save energy was in the year 2000 2777 # during the Arnoldo Aleman administration."... 2778 # The northamerica file says that Nicaragua has been on UTC-6 continuously 2779 # since December 1998. I wasn't able to find any details of Nicaraguan time 2780 # changes in 2000. Perhaps a note could be added to the northamerica file, to 2781 # the effect that we have indirect evidence that DST was observed in 2000. 2782 # 2783 # From Jesper Norgaard Welen (2005-11-02): 2784 # Nicaragua left DST the 2005-10-02 at 00:00 (local time). 2785 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 2786 # (2005-09-26) 2787 # 2788 # From Jesper Norgaard Welen (2006-05-05): 2789 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 2790 # (my informal translation) 2791 # By order of the president of the republic, Enrique Bolanos, Nicaragua 2792 # advanced by sixty minutes their official time, yesterday at 2 in the 2793 # morning, and will stay that way until 30.th. of september. 2794 # 2795 # From Jesper Norgaard Welen (2006-09-30): 2796 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 2797 # My informal translation runs: 2798 # The natural sun time is restored in all the national territory, in that the 2799 # time is returned one hour at 01:00 am of October 1 of 2006. 2800 # 2801 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2802 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 2803 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 2804 Rule Nic 2005 only - Apr 10 0:00 1:00 D 2805 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 2806 Rule Nic 2006 only - Apr 30 2:00 1:00 D 2807 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 2808 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2809 Zone America/Managua -5:45:08 - LMT 1890 2810 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 2811 -6:00 - CST 1973 May 2812 -5:00 - EST 1975 Feb 16 2813 -6:00 Nic C%sT 1992 Jan 1 4:00 2814 -5:00 - EST 1992 Sep 24 2815 -6:00 - CST 1993 2816 -5:00 - EST 1997 2817 -6:00 Nic C%sT 2818 2819 # Panama 2820 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2821 Zone America/Panama -5:18:08 - LMT 1890 2822 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 2823 -5:00 - EST 2824 2825 # Puerto Rico 2826 # There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 2827 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2828 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 2829 -4:00 - AST 1942 May 3 2830 -4:00 US A%sT 1946 2831 -4:00 - AST 2832 2833 # St Kitts-Nevis 2834 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2835 Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 2836 -4:00 - AST 2837 2838 # St Lucia 2839 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2840 Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries 2841 -4:04:00 - CMT 1912 # Castries Mean Time 2842 -4:00 - AST 2843 2844 # St Pierre and Miquelon 2845 # There are too many St Pierres elsewhere, so we'll use `Miquelon'. 2846 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2847 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 2848 -4:00 - AST 1980 May 2849 -3:00 - PMST 1987 # Pierre & Miquelon Time 2850 -3:00 Canada PM%sT 2851 2852 # St Vincent and the Grenadines 2853 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2854 Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 2855 -4:04:56 - KMT 1912 # Kingstown Mean Time 2856 -4:00 - AST 2857 2858 # Turks and Caicos 2859 # 2860 # From Chris Dunn in 2861 # <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 2862 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 2863 # daylight saving dates for time changes have been adjusted to match 2864 # the recent U.S. change of dates. 2865 # 2866 # From Brian Inglis (2007-04-28): 2867 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 2868 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 2869 # rows before that there is an out of date entry for Oct: 2870 # "Eastern Standard Times Begins 2007 2871 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 2872 # indicating that the normal ET rules are followed. 2873 # 2874 # From Paul Eggert (2006-05-01): 2875 # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 2876 # says they switch at midnight. Go with Shanks & Pottenger. 2877 # 2878 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2879 Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D 2880 Rule TC 1979 2006 - Oct lastSun 2:00 0 S 2881 Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 2882 Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D 2883 Rule TC 2007 max - Nov Sun>=1 2:00 0 S 2884 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2885 Zone America/Grand_Turk -4:44:32 - LMT 1890 2886 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2887 -5:00 TC E%sT 2888 2889 # British Virgin Is 2890 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2891 Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 2892 -4:00 - AST 2893 2894 # Virgin Is 2895 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2896 Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 2897 -4:00 - AST 2898
