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  23 #
  24 # <pre>
  25 # This file is in the public domain, so clarified as of
  26 # 2009-05-17 by Arthur David Olson.
  27 
  28 # This data is by no means authoritative; if you think you know better,
  29 # go ahead and edit the file (and please send any changes to
  30 # tz@elsie.nci.nih.gov for general use in the future).
  31 
  32 # From Paul Eggert (2006-03-22):
  33 # A good source for time zone historical data outside the U.S. is
  34 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
  35 # San Diego: ACS Publications, Inc. (2003).
  36 #
  37 # Gwillim Law writes that a good source
  38 # for recent time zone data is the International Air Transport
  39 # Association's Standard Schedules Information Manual (IATA SSIM),
  40 # published semiannually.  Law sent in several helpful summaries
  41 # of the IATA's data after 1990.
  42 #
  43 # Except where otherwise noted, Shanks & Pottenger is the source for
  44 # entries through 1990, and IATA SSIM is the source for entries afterwards.
  45 #
  46 # Earlier editions of these tables used the North American style (e.g. ARST and
  47 # ARDT for Argentine Standard and Daylight Time), but the following quote
  48 # suggests that it's better to use European style (e.g. ART and ARST).
  49 #       I suggest the use of _Summer time_ instead of the more cumbersome
  50 #       _daylight-saving time_.  _Summer time_ seems to be in general use
  51 #       in Europe and South America.
  52 #       -- E O Cutler, _New York Times_ (1937-02-14), quoted in
  53 #       H L Mencken, _The American Language: Supplement I_ (1960), p 466
  54 #
  55 # Earlier editions of these tables also used the North American style
  56 # for time zones in Brazil, but this was incorrect, as Brazilians say
  57 # "summer time".  Reinaldo Goulart, a Sao Paulo businessman active in
  58 # the railroad sector, writes (1999-07-06):
  59 #       The subject of time zones is currently a matter of discussion/debate in
  60 #       Brazil.  Let's say that "the Brasilia time" is considered the
  61 #       "official time" because Brasilia is the capital city.
  62 #       The other three time zones are called "Brasilia time "minus one" or
  63 #       "plus one" or "plus two".  As far as I know there is no such
  64 #       name/designation as "Eastern Time" or "Central Time".
  65 # So I invented the following (English-language) abbreviations for now.
  66 # Corrections are welcome!
  67 #               std     dst
  68 #       -2:00   FNT     FNST    Fernando de Noronha
  69 #       -3:00   BRT     BRST    Brasilia
  70 #       -4:00   AMT     AMST    Amazon
  71 #       -5:00   ACT     ACST    Acre
  72 
  73 ###############################################################################
  74 
  75 ###############################################################################
  76 
  77 # Argentina
  78 
  79 # From Bob Devine (1988-01-28):
  80 # Argentina: first Sunday in October to first Sunday in April since 1976.
  81 # Double Summer time from 1969 to 1974.  Switches at midnight.
  82 
  83 # From U. S. Naval Observatory (1988-01-199):
  84 # ARGENTINA           3 H BEHIND   UTC
  85 
  86 # From Hernan G. Otero (1995-06-26):
  87 # I am sending modifications to the Argentine time zone table...
  88 # AR was chosen because they are the ISO letters that represent Argentina.
  89 
  90 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
  91 Rule    Arg     1930    only    -       Dec      1      0:00    1:00    S
  92 Rule    Arg     1931    only    -       Apr      1      0:00    0       -
  93 Rule    Arg     1931    only    -       Oct     15      0:00    1:00    S
  94 Rule    Arg     1932    1940    -       Mar      1      0:00    0       -
  95 Rule    Arg     1932    1939    -       Nov      1      0:00    1:00    S
  96 Rule    Arg     1940    only    -       Jul      1      0:00    1:00    S
  97 Rule    Arg     1941    only    -       Jun     15      0:00    0       -
  98 Rule    Arg     1941    only    -       Oct     15      0:00    1:00    S
  99 Rule    Arg     1943    only    -       Aug      1      0:00    0       -
 100 Rule    Arg     1943    only    -       Oct     15      0:00    1:00    S
 101 Rule    Arg     1946    only    -       Mar      1      0:00    0       -
 102 Rule    Arg     1946    only    -       Oct      1      0:00    1:00    S
 103 Rule    Arg     1963    only    -       Oct      1      0:00    0       -
 104 Rule    Arg     1963    only    -       Dec     15      0:00    1:00    S
 105 Rule    Arg     1964    1966    -       Mar      1      0:00    0       -
 106 Rule    Arg     1964    1966    -       Oct     15      0:00    1:00    S
 107 Rule    Arg     1967    only    -       Apr      2      0:00    0       -
 108 Rule    Arg     1967    1968    -       Oct     Sun>=1       0:00    1:00    S
 109 Rule    Arg     1968    1969    -       Apr     Sun>=1       0:00    0       -
 110 Rule    Arg     1974    only    -       Jan     23      0:00    1:00    S
 111 Rule    Arg     1974    only    -       May      1      0:00    0       -
 112 Rule    Arg     1988    only    -       Dec      1      0:00    1:00    S
 113 #
 114 # From Hernan G. Otero (1995-06-26):
 115 # These corrections were contributed by InterSoft Argentina S.A.,
 116 # obtaining the data from the:
 117 # Talleres de Hidrografia Naval Argentina
 118 # (Argentine Naval Hydrography Institute)
 119 Rule    Arg     1989    1993    -       Mar     Sun>=1       0:00    0       -
 120 Rule    Arg     1989    1992    -       Oct     Sun>=15      0:00    1:00    S
 121 #
 122 # From Hernan G. Otero (1995-06-26):
 123 # From this moment on, the law that mandated the daylight saving
 124 # time corrections was derogated and no more modifications
 125 # to the time zones (for daylight saving) are now made.
 126 #
 127 # From Rives McDow (2000-01-10):
 128 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
 129 # which did not result in the switch of a time zone, as they stayed 9 hours
 130 # from the International Date Line.
 131 Rule    Arg     1999    only    -       Oct     Sun>=1       0:00    1:00    S
 132 # From Paul Eggert (2007-12-28):
 133 # DST was set to expire on March 5, not March 3, but since it was converted
 134 # to standard time on March 3 it's more convenient for us to pretend that
 135 # it ended on March 3.
 136 Rule    Arg     2000    only    -       Mar     3       0:00    0       -
 137 #
 138 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
 139 # We just checked with our Sao Paulo office and they say the government of
 140 # Argentina decided not to become one of the countries that go on or off DST.
 141 # So Buenos Aires should be -3 hours from GMT at all times.
 142 #
 143 # From Fabian L. Arce Jofre (2000-04-04):
 144 # The law that claimed DST for Argentina was derogated by President Fernando
 145 # de la Rua on March 2, 2000, because it would make people spend more energy
 146 # in the winter time, rather than less.  The change took effect on March 3.
 147 #
 148 # From Mariano Absatz (2001-06-06):
 149 # one of the major newspapers here in Argentina said that the 1999
 150 # Timezone Law (which never was effectively applied) will (would?) be
 151 # in effect.... The article is at
 152 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm
 153 # ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
 154 # 1999-09-17, and published 1999-09-21.  The official publication is at:
 155 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
 156 # Regretfully, you have to subscribe (and pay) for the on-line version....
 157 #
 158 # (2001-06-12):
 159 # the timezone for Argentina will not change next Sunday.
 160 # Apparently it will do so on Sunday 24th....
 161 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm
 162 #
 163 # (2001-06-25):
 164 # Last Friday (yes, the last working day before the date of the change), the
 165 # Senate annulled the 1999 law that introduced the changes later postponed.
 166 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
 167 # It remains the vote of the Deputies..., but it will be the same....
 168 # This kind of things had always been done this way in Argentina.
 169 # We are still -03:00 all year round in all of the country.
 170 #
 171 # From Steffen Thorsen (2007-12-21):
 172 # A user (Leonardo Chaim) reported that Argentina will adopt DST....
 173 # all of the country (all Zone-entries) are affected.  News reports like
 174 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
 175 # that Argentina will use DST next year as well, from October to
 176 # March, although exact rules are not given.
 177 #
 178 # From Jesper Norgaard Welen (2007-12-26)
 179 # The last hurdle of Argentina DST is over, the proposal was approved in
 180 # the lower chamber too (Deputados) with a vote 192 for and 2 against.
 181 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
 182 # the original scanned proposal, where the dates and the zero hours are
 183 # clear and unambiguous...This is the article about final approval:
 184 # <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
 185 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
 186 # </a>
 187 #
 188 # From Paul Eggert (2007-12-22):
 189 # For dates after mid-2008, the following rules are my guesses and
 190 # are quite possibly wrong, but are more likely than no DST at all.
 191 
 192 # From Alexander Krivenyshev (2008-09-05):
 193 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
 194 # Argentina will start DST on Sunday October 19, 2008.
 195 #
 196 # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html">
 197 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
 198 # </a>
 199 # OR
 200 # <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)">
 201 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
 202 # </a>
 203 
 204 # From Rodrigo Severo (2008-10-06):
 205 # Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
 206 # ...
 207 # ------- Comment #1 from [jmdocile]  2008-10-06 16:28 0000 -------
 208 # Hi, there is a problem with timezone-data-2008e and maybe with
 209 # timezone-data-2008f
 210 # Argentinian law [Number] 25.155 is no longer valid.
 211 # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm">
 212 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
 213 # </a>
 214 # The new one is law [Number] 26.350
 215 # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm">
 216 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
 217 # </a>
 218 # So there is no summer time in Argentina for now.
 219 
 220 # From Mariano Absatz (2008-10-20):
 221 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina
 222 # From 2008-10-19 until 2009-03-15
 223 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01">
 224 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
 225 # </a>
 226 #
 227 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 2008/2009:
 228 # Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La Pampa, Neuquen, Rio Negro, Chubut, Santa Cruz
 229 # and Tierra del Fuego
 230 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01">
 231 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
 232 # </a>
 233 #
 234 # Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying
 235 # it will not apply DST either (even when it was not included in Decree 1705/2008)
 236 # <a href="http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc">
 237 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
 238 # </a>
 239 
 240 # From fullinet (2009-10-18):
 241 # As announced in
 242 # <a hef="http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356">
 243 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
 244 # </a>
 245 # (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change")
 246 #
 247 # "Por el momento, el Gobierno Nacional resolvio no modificar la hora
 248 # oficial, decision que estaba en estudio para su implementacion el
 249 # domingo 18 de octubre. Desde el Ministerio de Planificacion se anuncio
 250 # que la Argentina hoy, en estas condiciones meteorologicas, no necesita
 251 # la modificacion del huso horario, ya que 2009 nos encuentra con
 252 # crecimiento en la produccion y distribucion energetica."
 253 
 254 Rule    Arg     2007    only    -       Dec     30      0:00    1:00    S
 255 Rule    Arg     2008    2009    -       Mar     Sun>=15      0:00    0       -
 256 Rule    Arg     2008    only    -       Oct     Sun>=15      0:00    1:00    S
 257  
 258 # From Mariano Absatz (2004-05-21):
 259 # Today it was officially published that the Province of Mendoza is changing
 260 # its timezone this winter... starting tomorrow night....
 261 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
 262 # From Paul Eggert (2004-05-24):
 263 # It's Law No. 7,210.  This change is due to a public power emergency, so for
 264 # now we'll assume it's for this year only.
 265 #
 266 # From Paul Eggert (2006-03-22):
 267 # <a href="http://www.spicasc.net/horvera.html">
 268 # Hora de verano para la Republica Argentina (2003-06-08)
 269 # </a> says that standard time in Argentina from 1894-10-31
 270 # to 1920-05-01 was -4:16:48.25.  Go with this more-precise value
 271 # over Shanks & Pottenger.
 272 #
 273 # From Mariano Absatz (2004-06-05):
 274 # These media articles from a major newspaper mostly cover the current state:
 275 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
 276 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
 277 #
 278 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
 279 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
 280 # Apparently, all nine provinces would go back to UTC-03:00 at the same
 281 # time in October 17th.
 282 #
 283 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
 284 # Tierra del Fuego, Tucuman.
 285 #
 286 # From Mariano Absatz (2004-06-14):
 287 # ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
 288 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
 289 # annoyance with the change is much higher than the power savings obtained....
 290 #
 291 # From Gwillim Law (2004-06-14):
 292 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
 293 #     "The time change in Tierra del Fuego was a conflicted decision from
 294 #   the start.  The government had decreed that the measure would take
 295 #   effect on June 1, but a normative error forced the new time to begin
 296 #   three days earlier, from a Saturday to a Sunday....
 297 # Our understanding was that the change was originally scheduled to take place
 298 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
 299 # provinces).  Sunday was May 30, only two days earlier.  So the article
 300 # contains a contradiction.  I would give more credence to the Saturday/Sunday
 301 # date than the "three days earlier" phrase, and conclude that Tierra del
 302 # Fuego set its clocks back at 2004-05-30 00:00.
 303 #
 304 # From Steffen Thorsen (2004-10-05):
 305 # The previous law 7210 which changed the province of Mendoza's time zone
 306 # back in May have been modified slightly in a new law 7277, which set the
 307 # new end date to 2004-09-26 (original date was 2004-10-17).
 308 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
 309 #
 310 # From Mariano Absatz (2004-10-05):
 311 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
 312 # Sunday, May 30th and Monday, May 31st.  It changed back to UTC-03:00
 313 # at midnight between Saturday, July 24th and Sunday, July 25th....
 314 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
 315 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
 316 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
 317 
 318 # From Alex Krivenyshev (2008-01-17):
 319 # Here are articles that Argentina Province San Luis is planning to end DST
 320 # as earlier as upcoming Monday January 21, 2008 or February 2008:
 321 #
 322 # Provincia argentina retrasa reloj y marca diferencia con resto del pais
 323 # (Argentine Province delayed clock and mark difference with the rest of the
 324 # country)
 325 # <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
 326 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
 327 # </a>
 328 #
 329 # Es inminente que en San Luis atrasen una hora los relojes
 330 # (It is imminent in San Luis clocks one hour delay)
 331 # <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
 332 # http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
 333 # </a>
 334 #
 335 # <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
 336 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
 337 # </a>
 338 
 339 # From Jesper Norgaard Welen (2008-01-18):
 340 # The page of the San Luis provincial government
 341 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
 342 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
 343 # </a>
 344 # confirms what Alex Krivenyshev has earlier sent to the tz
 345 # emailing list about that San Luis plans to return to standard
 346 # time much earlier than the rest of the country. It also
 347 # confirms that upon request the provinces San Juan and Mendoza 
 348 # refused to follow San Luis in this change. 
 349 # 
 350 # The change is supposed to take place Monday the 21.st at 0:00
 351 # hours. As far as I understand it if this goes ahead, we need
 352 # a new timezone for San Luis (although there are also documented
 353 # independent changes in the southamerica file of San Luis in
 354 # 1990 and 1991 which has not been confirmed).
 355 
 356 # From Jesper Norgaard Welen (2008-01-25):
 357 # Unfortunately the below page has become defunct, about the San Luis
 358 # time change. Perhaps because it now is part of a group of pages "Most
 359 # important pages of 2008."
 360 #
 361 # You can use
 362 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
 363 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
 364 # </a>
 365 # instead it seems. Or use "Buscador" from the main page of the San Luis
 366 # government, and fill in "huso" and click OK, and you will get 3 pages
 367 # from which the first one is identical to the above.
 368 
 369 # From Mariano Absatz (2008-01-28):
 370 # I can confirm that the Province of San Luis (and so far only that
 371 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
 372 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
 373 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
 374 # (that is, unless they change their mind any minute now).
 375 #
 376 # So we'll have to add yet another city to 'southamerica' (I think San
 377 # Luis city is the mos populated city in the Province, so it'd be
 378 # America/Argentina/San_Luis... of course I can't remember if San Luis's
 379 # history of particular changes goes along with Mendoza or San Juan :-(
 380 # (I only remember not being able to collect hard facts about San Luis
 381 # back in 2004, when these provinces changed to UTC-4 for a few days, I
 382 # mailed them personally and never got an answer).
 383 
 384 # From Paul Eggert (2008-06-30):
 385 # Unless otherwise specified, data are from Shanks & Pottenger through 1992,
 386 # from the IATA otherwise.  As noted below, Shanks & Pottenger say that
 387 # America/Cordoba split into 6 subregions during 1991/1992, one of which
 388 # was America/San_Luis, but we haven't verified this yet so for now we'll
 389 # keep America/Cordoba a single region rather than splitting it into the
 390 # other 5 subregions.
 391 
 392 # From Mariano Absatz (2009-03-13):
 393 # Yesterday (with our usual 2-day notice) the Province of San Luis
 394 # decided that next Sunday instead of "staying" @utc-03:00 they will go
 395 # to utc-04:00 until the second Saturday in October...
 396 #
 397 # The press release is at
 398 # <a href="http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102">
 399 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
 400 # </a>
 401 # (I couldn't find the decree, but
 402 # <a href="http://www.sanluis.gov.ar">
 403 # www.sanluis.gov.ar
 404 # <a/>
 405 # is the official page for the Province Government).
 406 #
 407 # There's also a note in only one of the major national papers (La Nación) at
 408 # <a href="http://www.lanacion.com.ar/nota.asp?nota_id=1107912">
 409 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
 410 # </a>
 411 # 
 412 # The press release says:
 413 #  (...) anunció que el próximo domingo a las 00:00 los puntanos deberán
 414 # atrasar una hora sus relojes.
 415 #
 416 # A partir de entonces, San Luis establecerá el huso horario propio de
 417 # la Provincia. De esta manera, durante el periodo del calendario anual
 418 # 2009, el cambio horario quedará comprendido entre las 00:00 del tercer
 419 # domingo de marzo y las 24:00 del segundo sábado de octubre.
 420 # Quick&dirty translation
 421 # (...) announced that next Sunday, at 00:00, Puntanos (the San Luis
 422 # inhabitants) will have to turn back one hour their clocks
 423 #
 424 # Since then, San Luis will establish its own Province timezone. Thus,
 425 # during 2009, this timezone change will run from 00:00 the third Sunday
 426 # in March until 24:00 of the second Saturday in October.
 427 
 428 # From Mariano Absatz (2009-10-16):
 429 # ...the Province of San Luis is a case in itself.
 430 #
 431 # The Law at
 432 # <a href="http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276>"
 433 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
 434 # </a>
 435 # is ambiguous because establishes a calendar from the 2nd Sunday in
 436 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the
 437 # complement of that starting on the 2nd Sunday of March at 0:00 and
 438 # ending on the 2nd Saturday of March at 24:00.
 439 #
 440 # This clearly breaks every time the 1st of March or October is a Sunday.
 441 #
 442 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
 443 # Sunday of October and March.
 444 #
 445 # The problem is that the changes in the rest of the Provinces that did
 446 # change in 2007/2008, were made according to the Federal Law and Decrees
 447 # that did so on the 3rd Sunday of October and March.
 448 #
 449 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
 450 # (October 11th) at 0:00.
 451 #
 452 # So I guess a new set of rules, besides "Arg", must be made and the last
 453 # America/Argentina/San_Luis entries should change to use these...
 454 #
 455 # I'm enclosing a patch that does what I say... regretfully, the San Luis
 456 # timezone must be called "WART/WARST" even when most of the time (like,
 457 # right now) WARST == ART... that is, since last Sunday, all the country
 458 # is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
 459 # of the country calls it "ART".
 460 # ...
 461 
 462 # From Alexander Krivenyshev (2010-04-09):
 463 # According to news reports from El Diario de la Republica Province San
 464 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
 465 # after April 11, 2010--will continue to have same time as rest of
 466 # Argentina (UTC-3) (no DST).
 467 #
 468 # Confirmaron la pr&oacute;rroga del huso horario de verano (Spanish)
 469 # <a href="http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9">
 470 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
 471 # </a>
 472 # or (some English translation):
 473 # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina08.html">
 474 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
 475 # </a>
 476 
 477 # From Mariano Absatz (2010-04-12):
 478 # yes...I can confirm this...and given that San Luis keeps calling
 479 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
 480 # rules...San Luis is still using "Western ARgentina Time" and it got
 481 # stuck on Summer daylight savings time even though the summer is over.
 482 
 483 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 484 #
 485 # Buenos Aires (BA), Capital Federal (CF),
 486 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
 487                         -4:16:48 -      CMT     1920 May # Cordoba Mean Time
 488                         -4:00   -       ART     1930 Dec
 489                         -4:00   Arg     AR%sT   1969 Oct  5
 490                         -3:00   Arg     AR%sT   1999 Oct  3
 491                         -4:00   Arg     AR%sT   2000 Mar  3
 492                         -3:00   Arg     AR%sT
 493 #
 494 # Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),
 495 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
 496 #
 497 # Shanks & Pottenger also make the following claims, which we haven't verified:
 498 # - Formosa switched to -3:00 on 1991-01-07.
 499 # - Misiones switched to -3:00 on 1990-12-29.
 500 # - Chaco switched to -3:00 on 1991-01-04.
 501 # - Santiago del Estero switched to -4:00 on 1991-04-01,
 502 #   then to -3:00 on 1991-04-26.
 503 #
 504 Zone America/Argentina/Cordoba -4:16:48 - LMT   1894 Oct 31
 505                         -4:16:48 -      CMT     1920 May
 506                         -4:00   -       ART     1930 Dec
 507                         -4:00   Arg     AR%sT   1969 Oct  5
 508                         -3:00   Arg     AR%sT   1991 Mar  3
 509                         -4:00   -       WART    1991 Oct 20
 510                         -3:00   Arg     AR%sT   1999 Oct  3
 511                         -4:00   Arg     AR%sT   2000 Mar  3
 512                         -3:00   Arg     AR%sT
 513 #
 514 # Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
 515 Zone America/Argentina/Salta -4:21:40 - LMT     1894 Oct 31
 516                         -4:16:48 -      CMT     1920 May
 517                         -4:00   -       ART     1930 Dec
 518                         -4:00   Arg     AR%sT   1969 Oct  5
 519                         -3:00   Arg     AR%sT   1991 Mar  3
 520                         -4:00   -       WART    1991 Oct 20
 521                         -3:00   Arg     AR%sT   1999 Oct  3
 522                         -4:00   Arg     AR%sT   2000 Mar  3
 523                         -3:00   Arg     AR%sT   2008 Oct 18
 524                         -3:00   -       ART
 525 #
 526 # Tucuman (TM)
 527 Zone America/Argentina/Tucuman -4:20:52 - LMT   1894 Oct 31
 528                         -4:16:48 -      CMT     1920 May
 529                         -4:00   -       ART     1930 Dec
 530                         -4:00   Arg     AR%sT   1969 Oct  5
 531                         -3:00   Arg     AR%sT   1991 Mar  3
 532                         -4:00   -       WART    1991 Oct 20
 533                         -3:00   Arg     AR%sT   1999 Oct  3
 534                         -4:00   Arg     AR%sT   2000 Mar  3
 535                         -3:00   -       ART     2004 Jun  1
 536                         -4:00   -       WART    2004 Jun 13
 537                         -3:00   Arg     AR%sT
 538 #
 539 # La Rioja (LR)
 540 Zone America/Argentina/La_Rioja -4:27:24 - LMT  1894 Oct 31
 541                         -4:16:48 -      CMT     1920 May
 542                         -4:00   -       ART     1930 Dec
 543                         -4:00   Arg     AR%sT   1969 Oct  5
 544                         -3:00   Arg     AR%sT   1991 Mar  1
 545                         -4:00   -       WART    1991 May  7
 546                         -3:00   Arg     AR%sT   1999 Oct  3
 547                         -4:00   Arg     AR%sT   2000 Mar  3
 548                         -3:00   -       ART     2004 Jun  1
 549                         -4:00   -       WART    2004 Jun 20
 550                         -3:00   Arg     AR%sT   2008 Oct 18
 551                         -3:00   -       ART
 552 #
 553 # San Juan (SJ)
 554 Zone America/Argentina/San_Juan -4:34:04 - LMT  1894 Oct 31
 555                         -4:16:48 -      CMT     1920 May
 556                         -4:00   -       ART     1930 Dec
 557                         -4:00   Arg     AR%sT   1969 Oct  5
 558                         -3:00   Arg     AR%sT   1991 Mar  1
 559                         -4:00   -       WART    1991 May  7
 560                         -3:00   Arg     AR%sT   1999 Oct  3
 561                         -4:00   Arg     AR%sT   2000 Mar  3
 562                         -3:00   -       ART     2004 May 31
 563                         -4:00   -       WART    2004 Jul 25
 564                         -3:00   Arg     AR%sT   2008 Oct 18
 565                         -3:00   -       ART
 566 #
 567 # Jujuy (JY)
 568 Zone America/Argentina/Jujuy -4:21:12 - LMT     1894 Oct 31
 569                         -4:16:48 -      CMT     1920 May
 570                         -4:00   -       ART     1930 Dec
 571                         -4:00   Arg     AR%sT   1969 Oct  5
 572                         -3:00   Arg     AR%sT   1990 Mar  4
 573                         -4:00   -       WART    1990 Oct 28
 574                         -4:00   1:00    WARST   1991 Mar 17
 575                         -4:00   -       WART    1991 Oct  6
 576                         -3:00   1:00    ARST    1992
 577                         -3:00   Arg     AR%sT   1999 Oct  3
 578                         -4:00   Arg     AR%sT   2000 Mar  3
 579                         -3:00   Arg     AR%sT   2008 Oct 18
 580                         -3:00   -       ART
 581 #
 582 # Catamarca (CT), Chubut (CH)
 583 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
 584                         -4:16:48 -      CMT     1920 May
 585                         -4:00   -       ART     1930 Dec
 586                         -4:00   Arg     AR%sT   1969 Oct  5
 587                         -3:00   Arg     AR%sT   1991 Mar  3
 588                         -4:00   -       WART    1991 Oct 20
 589                         -3:00   Arg     AR%sT   1999 Oct  3
 590                         -4:00   Arg     AR%sT   2000 Mar  3
 591                         -3:00   -       ART     2004 Jun  1
 592                         -4:00   -       WART    2004 Jun 20
 593                         -3:00   Arg     AR%sT   2008 Oct 18
 594                         -3:00   -       ART
 595 #
 596 # Mendoza (MZ)
 597 Zone America/Argentina/Mendoza -4:35:16 - LMT   1894 Oct 31
 598                         -4:16:48 -      CMT     1920 May
 599                         -4:00   -       ART     1930 Dec
 600                         -4:00   Arg     AR%sT   1969 Oct  5
 601                         -3:00   Arg     AR%sT   1990 Mar  4
 602                         -4:00   -       WART    1990 Oct 15
 603                         -4:00   1:00    WARST   1991 Mar  1
 604                         -4:00   -       WART    1991 Oct 15
 605                         -4:00   1:00    WARST   1992 Mar  1
 606                         -4:00   -       WART    1992 Oct 18
 607                         -3:00   Arg     AR%sT   1999 Oct  3
 608                         -4:00   Arg     AR%sT   2000 Mar  3
 609                         -3:00   -       ART     2004 May 23
 610                         -4:00   -       WART    2004 Sep 26
 611                         -3:00   Arg     AR%sT   2008 Oct 18
 612                         -3:00   -       ART
 613 #
 614 # San Luis (SL)
 615 
 616 Rule    SanLuis 2008    2009    -       Mar     Sun>=8       0:00    0       -
 617 Rule    SanLuis 2007    2009    -       Oct     Sun>=8       0:00    1:00    S
 618 
 619 Zone America/Argentina/San_Luis -4:25:24 - LMT  1894 Oct 31
 620                         -4:16:48 -      CMT     1920 May
 621                         -4:00   -       ART     1930 Dec
 622                         -4:00   Arg     AR%sT   1969 Oct  5
 623                         -3:00   Arg     AR%sT   1990
 624                         -3:00   1:00    ARST    1990 Mar 14
 625                         -4:00   -       WART    1990 Oct 15
 626                         -4:00   1:00    WARST   1991 Mar  1
 627                         -4:00   -       WART    1991 Jun  1
 628                         -3:00   -       ART     1999 Oct  3
 629                         -4:00   1:00    WARST   2000 Mar  3
 630                         -3:00   -       ART     2004 May 31
 631                         -4:00   -       WART    2004 Jul 25
 632                         -3:00   Arg     AR%sT   2008 Jan 21
 633                         -4:00   SanLuis WAR%sT
 634 #
 635 # Santa Cruz (SC)
 636 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
 637                         -4:16:48 -      CMT     1920 May # Cordoba Mean Time
 638                         -4:00   -       ART     1930 Dec
 639                         -4:00   Arg     AR%sT   1969 Oct  5
 640                         -3:00   Arg     AR%sT   1999 Oct  3
 641                         -4:00   Arg     AR%sT   2000 Mar  3
 642                         -3:00   -       ART     2004 Jun  1
 643                         -4:00   -       WART    2004 Jun 20
 644                         -3:00   Arg     AR%sT   2008 Oct 18
 645                         -3:00   -       ART
 646 #
 647 # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
 648 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
 649                         -4:16:48 -      CMT     1920 May # Cordoba Mean Time
 650                         -4:00   -       ART     1930 Dec
 651                         -4:00   Arg     AR%sT   1969 Oct  5
 652                         -3:00   Arg     AR%sT   1999 Oct  3
 653                         -4:00   Arg     AR%sT   2000 Mar  3
 654                         -3:00   -       ART     2004 May 30
 655                         -4:00   -       WART    2004 Jun 20
 656                         -3:00   Arg     AR%sT   2008 Oct 18
 657                         -3:00   -       ART
 658 
 659 # Aruba
 660 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 661 Zone    America/Aruba   -4:40:24 -      LMT     1912 Feb 12     # Oranjestad
 662                         -4:30   -       ANT     1965 # Netherlands Antilles Time
 663                         -4:00   -       AST
 664 
 665 # Bolivia
 666 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 667 Zone    America/La_Paz  -4:32:36 -      LMT     1890
 668                         -4:32:36 -      CMT     1931 Oct 15 # Calamarca MT
 669                         -4:32:36 1:00   BOST    1932 Mar 21 # Bolivia ST
 670                         -4:00   -       BOT     # Bolivia Time
 671 
 672 # Brazil
 673 
 674 # From Paul Eggert (1993-11-18):
 675 # The mayor of Rio recently attempted to change the time zone rules
 676 # just in his city, in order to leave more summer time for the tourist trade.
 677 # The rule change lasted only part of the day;
 678 # the federal government refused to follow the city's rules, and business
 679 # was in a chaos, so the mayor backed down that afternoon.
 680 
 681 # From IATA SSIM (1996-02):
 682 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
 683 # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
 684 # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
 685 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
 686 # [The last three states are new to this issue of the IATA SSIM.]
 687 
 688 # From Gwillim Law (1996-10-07):
 689 # Geography, history (Tocantins was part of Goias until 1989), and other
 690 # sources of time zone information lead me to believe that AL, SE, and TO were
 691 # always in BR1, and so the only change was whether or not they observed DST....
 692 # The earliest issue of the SSIM I have is 2/91.  Each issue from then until
 693 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
 694 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
 695 # (UTC-4)....  The other two time zones given for Brazil are BR3, which is
 696 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
 697 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
 698 # become part of the state of Pernambuco).  The boundary between BR1 and BR2
 699 # has never been clearly stated.  They've simply been called East and West.
 700 # However, some conclusions can be drawn from another IATA manual: the Airline
 701 # Coding Directory, which lists close to 400 airports in Brazil.  For each
 702 # airport it gives a time zone which is coded to the SSIM.  From that
 703 # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
 704 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
 705 # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
 706 
 707 # From Marcos Tadeu (1998-09-27):
 708 # <a href="http://pcdsh01.on.br/verao1.html">
 709 # Brazilian official page
 710 # </a>
 711 
 712 # From Jesper Norgaard (2000-11-03):
 713 # [For an official list of which regions in Brazil use which time zones, see:]
 714 # http://pcdsh01.on.br/Fusbr.htm
 715 # http://pcdsh01.on.br/Fusbrhv.htm
 716 
 717 # From Celso Doria via David Madeo (2002-10-09):
 718 # The reason for the delay this year has to do with elections in Brazil.
 719 #
 720 # Unlike in the United States, elections in Brazil are 100% computerized and
 721 # the results are known almost immediately.  Yesterday, it was the first
 722 # round of the elections when 115 million Brazilians voted for President,
 723 # Governor, Senators, Federal Deputies, and State Deputies.  Nobody is
 724 # counting (or re-counting) votes anymore and we know there will be a second
 725 # round for the Presidency and also for some Governors.  The 2nd round will
 726 # take place on October 27th.
 727 #
 728 # The reason why the DST will only begin November 3rd is that the thousands
 729 # of electoral machines used cannot have their time changed, and since the
 730 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
 731 # the Government decided to postpone DST, instead of changing the Constitution
 732 # (maybe, for the next elections, it will be possible to change the clock)...
 733 
 734 # From Rodrigo Severo (2004-10-04):
 735 # It's just the biannual change made necessary by the much hyped, supposedly
 736 # modern Brazilian eletronic voting machines which, apparently, can't deal
 737 # with a time change between the first and the second rounds of the elections.
 738 
 739 # From Steffen Thorsen (2007-09-20):
 740 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
 741 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
 742 
 743 # From Paul Schulze (2008-06-24):
 744 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
 745 # Oficial da Uniao"...) in Brazil there are changes in the timezones,
 746 # effective today (00:00am at June 24, 2008) as follows:
 747 #
 748 # a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
 749 # part of the Amazonas state that had this timezone now being put to the
 750 # timezone UTC+4
 751 # b) The whole Para state now is put at timezone UTC+3, instead of just
 752 # part of it, as was before.
 753 #
 754 # This change follows a proposal of senator Tiao Viana of Acre state, that
 755 # proposed it due to concerns about open television channels displaying
 756 # programs inappropriate to youths in the states that had the timezone
 757 # UTC+5 too early in the night. In the occasion, some more corrections
 758 # were proposed, trying to unify the timezones of any given state. This
 759 # change modifies timezone rules defined in decree 2.784 of 18 June,
 760 # 1913.
 761 
 762 # From Rodrigo Severo (2008-06-24):
 763 # Just correcting the URL:
 764 # <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008">
 765 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
 766 # </a>
 767 #
 768 # As a result of the above Decree I believe the America/Rio_Branco
 769 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
 770 # be created to represent the...west side of the Para State. I
 771 # suggest this new timezone be called Santarem as the most
 772 # important/populated city in the affected area.
 773 #
 774 # This new timezone would be the same as the Rio_Branco timezone up to
 775 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
 776 
 777 # From Alex Krivenyshev (2008-06-24):
 778 # This is a quick reference page for New and Old Brazil Time Zones map.
 779 # <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
 780 # http://www.worldtimezone.com/brazil-time-new-old.php
 781 # </a>
 782 #
 783 # - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
 784 # (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
 785 # part of Par state is moving to one timezone UTC- 03 (from UTC -04).
 786 
 787 # From Paul Eggert (2002-10-10):
 788 # The official decrees referenced below are mostly taken from
 789 # <a href="http://pcdsh01.on.br/DecHV.html">
 790 # Decretos sobre o Horario de Verao no Brasil
 791 # </a>.
 792 
 793 # From Steffen Thorsen (2008-08-29):
 794 # As announced by the government and many newspapers in Brazil late
 795 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
 796 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
 797 # past years experience with the elections, there was a good chance that
 798 # the start was postponed to November, but it did not happen this year.
 799 #
 800 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
 801 #
 802 # An official page about it:
 803 # <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
 804 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
 805 # </a>
 806 # Note that this link does not always work directly, but must be accessed
 807 # by going to
 808 # <a href="http://www.mme.gov.br/first">
 809 # http://www.mme.gov.br/first
 810 # </a>
 811 #
 812 # One example link that works directly:
 813 # <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
 814 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
 815 # (Portuguese)
 816 # </a>
 817 #
 818 # We have a written a short article about it as well:
 819 # <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
 820 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
 821 # </a>
 822 #
 823 # From Alexander Krivenyshev (2011-10-04):
 824 # State Bahia will return to Daylight savings time this year after 8 years off.
 825 # The announcement was made by Governor Jaques Wagner in an interview to a 
 826 # television station in Salvador. 
 827 
 828 # In Portuguese:
 829 # <a href="http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html">
 830 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
 831 # </a> and
 832 # <a href="http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html">
 833 # http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
 834 # </a>
 835 
 836 # From Guilherme Bernardes Rodrigues (2011-10-07):
 837 # There is news in the media, however there is still no decree about it.
 838 # I just send a e-mail to Zulmira Brandão at
 839 # <a href="http://pcdsh01.on.br/">http://pcdsh01.on.br/</a> the
 840 # oficial agency about time in Brazil, and she confirmed that the old rule is
 841 # still in force.
 842 
 843 # From Guilherme Bernardes Rodrigues (2011-10-14)
 844 # It's official, the President signed a decree that includes Bahia in summer
 845 # time.
 846 #        [ and in a second message (same day): ]
 847 # I found the decree.
 848 #
 849 # DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011
 850 # Link :
 851 # <a href="http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6">
 852 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
 853 # </a>
 854 
 855 
 856 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
 857 # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
 858 # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
 859 Rule    Brazil  1931    only    -       Oct      3      11:00   1:00    S
 860 Rule    Brazil  1932    1933    -       Apr      1       0:00   0       -
 861 Rule    Brazil  1932    only    -       Oct      3       0:00   1:00    S
 862 # Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
 863 # revoked DST.
 864 # Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
 865 # Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
 866 Rule    Brazil  1949    1952    -       Dec      1       0:00   1:00    S
 867 Rule    Brazil  1950    only    -       Apr     16       1:00   0       -
 868 Rule    Brazil  1951    1952    -       Apr      1       0:00   0       -
 869 # Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
 870 Rule    Brazil  1953    only    -       Mar      1       0:00   0       -
 871 # Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
 872 # revoked DST.
 873 # Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
 874 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
 875 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
 876 # Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
 877 # extended the above decree to all of the national territory on 12-09.
 878 Rule    Brazil  1963    only    -       Dec      9       0:00   1:00    S
 879 # Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
 880 # extended summer time by one day to 1964-03-01 00:00 (start of school).
 881 Rule    Brazil  1964    only    -       Mar      1       0:00   0       -
 882 # Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
 883 Rule    Brazil  1965    only    -       Jan     31       0:00   1:00    S
 884 Rule    Brazil  1965    only    -       Mar     31       0:00   0       -
 885 # Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
 886 Rule    Brazil  1965    only    -       Dec      1       0:00   1:00    S
 887 # Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
 888 Rule    Brazil  1966    1968    -       Mar      1       0:00   0       -
 889 Rule    Brazil  1966    1967    -       Nov      1       0:00   1:00    S
 890 # Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
 891 # revoked DST.
 892 # Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
 893 Rule    Brazil  1985    only    -       Nov      2       0:00   1:00    S
 894 # Decree 92,310 (1986-01-21)
 895 # Decree 92,463 (1986-03-13)
 896 Rule    Brazil  1986    only    -       Mar     15       0:00   0       -
 897 # Decree 93,316 (1986-10-01)
 898 Rule    Brazil  1986    only    -       Oct     25       0:00   1:00    S
 899 Rule    Brazil  1987    only    -       Feb     14       0:00   0       -
 900 # Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
 901 Rule    Brazil  1987    only    -       Oct     25       0:00   1:00    S
 902 Rule    Brazil  1988    only    -       Feb      7       0:00   0       -
 903 # Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
 904 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
 905 Rule    Brazil  1988    only    -       Oct     16       0:00   1:00    S
 906 Rule    Brazil  1989    only    -       Jan     29       0:00   0       -
 907 # Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
 908 # with the same exceptions
 909 Rule    Brazil  1989    only    -       Oct     15       0:00   1:00    S
 910 Rule    Brazil  1990    only    -       Feb     11       0:00   0       -
 911 # Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
 912 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
 913 # Decree 99,629 (1990-10-19) adds BA, MT.
 914 Rule    Brazil  1990    only    -       Oct     21       0:00   1:00    S
 915 Rule    Brazil  1991    only    -       Feb     17       0:00   0       -
 916 # <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
 917 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
 918 Rule    Brazil  1991    only    -       Oct     20       0:00   1:00    S
 919 Rule    Brazil  1992    only    -       Feb      9       0:00   0       -
 920 # <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
 921 # adopted by same states.
 922 Rule    Brazil  1992    only    -       Oct     25       0:00   1:00    S
 923 Rule    Brazil  1993    only    -       Jan     31       0:00   0       -
 924 # Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
 925 # adopted by same states, plus AM.
 926 # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
 927 # web page corrected 2004-01-07) adopted by same states, minus AM.
 928 # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
 929 # adopted by same states, plus MT and TO.
 930 # Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
 931 # adds AL, SE.
 932 Rule    Brazil  1993    1995    -       Oct     Sun>=11       0:00   1:00    S
 933 Rule    Brazil  1994    1995    -       Feb     Sun>=15       0:00   0       -
 934 Rule    Brazil  1996    only    -       Feb     11       0:00   0       -
 935 # Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
 936 # adopted by same states, minus AL, SE.
 937 Rule    Brazil  1996    only    -       Oct      6       0:00   1:00    S
 938 Rule    Brazil  1997    only    -       Feb     16       0:00   0       -
 939 # From Daniel C. Sobral (1998-02-12):
 940 # In 1997, the DS began on October 6. The stated reason was that
 941 # because international television networks ignored Brazil's policy on DS,
 942 # they bought the wrong times on satellite for coverage of Pope's visit.
 943 # This year, the ending date of DS was postponed to March 1
 944 # to help dealing with the shortages of electric power.
 945 #
 946 # Decree 2,317 (1997-09-04), adopted by same states.
 947 Rule    Brazil  1997    only    -       Oct      6       0:00   1:00    S
 948 # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
 949 # (1998-02-10)
 950 Rule    Brazil  1998    only    -       Mar      1       0:00   0       -
 951 # Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
 952 # adopted by the same states as before.
 953 Rule    Brazil  1998    only    -       Oct     11       0:00   1:00    S
 954 Rule    Brazil  1999    only    -       Feb     21       0:00   0       -
 955 # Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
 956 # (1999-08-23) adopted by same states.
 957 # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
 958 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
 959 Rule    Brazil  1999    only    -       Oct      3       0:00   1:00    S
 960 Rule    Brazil  2000    only    -       Feb     27       0:00   0       -
 961 # Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
 962 # adopted by the same states as before.
 963 # Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
 964 # repeals DST in PE and RR, effective 2000-10-15 00:00.
 965 # Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
 966 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
 967 # Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
 968 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
 969 Rule    Brazil  2000    2001    -       Oct     Sun>=8        0:00   1:00    S
 970 Rule    Brazil  2001    2006    -       Feb     Sun>=15       0:00   0       -
 971 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
 972 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
 973 Rule    Brazil  2002    only    -       Nov      3       0:00   1:00    S
 974 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
 975 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
 976 Rule    Brazil  2003    only    -       Oct     19       0:00   1:00    S
 977 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
 978 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
 979 Rule    Brazil  2004    only    -       Nov      2       0:00   1:00    S
 980 # Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
 981 # adopted by the same states as before.
 982 Rule    Brazil  2005    only    -       Oct     16       0:00   1:00    S
 983 # Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
 984 # adopted by the same states as before.
 985 Rule    Brazil  2006    only    -       Nov      5       0:00   1:00    S
 986 Rule    Brazil  2007    only    -       Feb     25       0:00   0       -
 987 # Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
 988 # adopted by the same states as before.
 989 Rule    Brazil  2007    only    -       Oct     Sun>=8        0:00   1:00    S
 990 # From Frederico A. C. Neves (2008-09-10):
 991 # Acording to this decree
 992 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
 993 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
 994 # </a>
 995 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
 996 # 3rd Feb Sunday. There is an exception on the return date when this is
 997 # the Carnival Sunday then the return date will be the next Sunday...
 998 Rule    Brazil  2008    max     -       Oct     Sun>=15      0:00    1:00    S
 999 Rule    Brazil  2008    2011    -       Feb     Sun>=15      0:00    0       -
1000 Rule    Brazil  2012    only    -       Feb     Sun>=22      0:00    0       -
1001 Rule    Brazil  2013    2014    -       Feb     Sun>=15      0:00    0       -
1002 Rule    Brazil  2015    only    -       Feb     Sun>=22      0:00    0       -
1003 Rule    Brazil  2016    2022    -       Feb     Sun>=15      0:00    0       -
1004 Rule    Brazil  2023    only    -       Feb     Sun>=22      0:00    0       -
1005 Rule    Brazil  2024    2025    -       Feb     Sun>=15      0:00    0       -
1006 Rule    Brazil  2026    only    -       Feb     Sun>=22      0:00    0       -
1007 Rule    Brazil  2027    2033    -       Feb     Sun>=15      0:00    0       -
1008 Rule    Brazil  2034    only    -       Feb     Sun>=22      0:00    0       -
1009 Rule    Brazil  2035    2036    -       Feb     Sun>=15      0:00    0       -
1010 Rule    Brazil  2037    only    -       Feb     Sun>=22      0:00    0       -
1011 # From Arthur David Olson (2008-09-29):
1012 # The next is wrong in some years but is better than nothing.
1013 Rule    Brazil  2038    max     -       Feb     Sun>=15      0:00    0       -
1014 
1015 # The latest ruleset listed above says that the following states observe DST:
1016 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
1017 
1018 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1019 #
1020 # Fernando de Noronha (administratively part of PE)
1021 Zone America/Noronha    -2:09:40 -      LMT     1914
1022                         -2:00   Brazil  FN%sT   1990 Sep 17
1023                         -2:00   -       FNT     1999 Sep 30
1024                         -2:00   Brazil  FN%sT   2000 Oct 15
1025                         -2:00   -       FNT     2001 Sep 13
1026                         -2:00   Brazil  FN%sT   2002 Oct  1
1027                         -2:00   -       FNT
1028 # Other Atlantic islands have no permanent settlement.
1029 # These include Trindade and Martin Vaz (administratively part of ES),
1030 # Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
1031 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
1032 # it also included the Penedos.
1033 #
1034 # Amapa (AP), east Para (PA)
1035 # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
1036 # The division between east and west Para is the river Xingu.
1037 # In the north a very small part from the river Javary (now Jari I guess,
1038 # the border with Amapa) to the Amazon, then to the Xingu.
1039 Zone America/Belem      -3:13:56 -      LMT     1914
1040                         -3:00   Brazil  BR%sT   1988 Sep 12
1041                         -3:00   -       BRT
1042 #
1043 # west Para (PA)
1044 # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
1045 Zone America/Santarem   -3:38:48 -      LMT     1914
1046                         -4:00   Brazil  AM%sT   1988 Sep 12
1047                         -4:00   -       AMT     2008 Jun 24 00:00
1048                         -3:00   -       BRT
1049 #
1050 # Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
1051 # Paraiba (PB)
1052 Zone America/Fortaleza  -2:34:00 -      LMT     1914
1053                         -3:00   Brazil  BR%sT   1990 Sep 17
1054                         -3:00   -       BRT     1999 Sep 30
1055                         -3:00   Brazil  BR%sT   2000 Oct 22
1056                         -3:00   -       BRT     2001 Sep 13
1057                         -3:00   Brazil  BR%sT   2002 Oct  1
1058                         -3:00   -       BRT
1059 #
1060 # Pernambuco (PE) (except Atlantic islands)
1061 Zone America/Recife     -2:19:36 -      LMT     1914
1062                         -3:00   Brazil  BR%sT   1990 Sep 17
1063                         -3:00   -       BRT     1999 Sep 30
1064                         -3:00   Brazil  BR%sT   2000 Oct 15
1065                         -3:00   -       BRT     2001 Sep 13
1066                         -3:00   Brazil  BR%sT   2002 Oct  1
1067                         -3:00   -       BRT
1068 #
1069 # Tocantins (TO)
1070 Zone America/Araguaina  -3:12:48 -      LMT     1914
1071                         -3:00   Brazil  BR%sT   1990 Sep 17
1072                         -3:00   -       BRT     1995 Sep 14
1073                         -3:00   Brazil  BR%sT   2003 Sep 24
1074                         -3:00   -       BRT
1075 #
1076 # Alagoas (AL), Sergipe (SE)
1077 Zone America/Maceio     -2:22:52 -      LMT     1914
1078                         -3:00   Brazil  BR%sT   1990 Sep 17
1079                         -3:00   -       BRT     1995 Oct 13
1080                         -3:00   Brazil  BR%sT   1996 Sep  4
1081                         -3:00   -       BRT     1999 Sep 30
1082                         -3:00   Brazil  BR%sT   2000 Oct 22
1083                         -3:00   -       BRT     2001 Sep 13
1084                         -3:00   Brazil  BR%sT   2002 Oct  1
1085                         -3:00   -       BRT
1086 #
1087 # Bahia (BA)
1088 # There are too many Salvadors elsewhere, so use America/Bahia instead
1089 # of America/Salvador.
1090 Zone America/Bahia      -2:34:04 -      LMT     1914
1091                         -3:00   Brazil  BR%sT   2003 Sep 24
1092                         -3:00   -       BRT     2011 Oct 16
1093                         -3:00   Brazil  BR%sT
1094 #
1095 # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
1096 # Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
1097 # Santa Catarina (SC), Rio Grande do Sul (RS)
1098 Zone America/Sao_Paulo  -3:06:28 -      LMT     1914
1099                         -3:00   Brazil  BR%sT   1963 Oct 23 00:00
1100                         -3:00   1:00    BRST    1964
1101                         -3:00   Brazil  BR%sT
1102 #
1103 # Mato Grosso do Sul (MS)
1104 Zone America/Campo_Grande -3:38:28 -    LMT     1914
1105                         -4:00   Brazil  AM%sT
1106 #
1107 # Mato Grosso (MT)
1108 Zone America/Cuiaba     -3:44:20 -      LMT     1914
1109                         -4:00   Brazil  AM%sT   2003 Sep 24
1110                         -4:00   -       AMT     2004 Oct  1
1111                         -4:00   Brazil  AM%sT
1112 #
1113 # Rondonia (RO)
1114 Zone America/Porto_Velho -4:15:36 -     LMT     1914
1115                         -4:00   Brazil  AM%sT   1988 Sep 12
1116                         -4:00   -       AMT
1117 #
1118 # Roraima (RR)
1119 Zone America/Boa_Vista  -4:02:40 -      LMT     1914
1120                         -4:00   Brazil  AM%sT   1988 Sep 12
1121                         -4:00   -       AMT     1999 Sep 30
1122                         -4:00   Brazil  AM%sT   2000 Oct 15
1123                         -4:00   -       AMT
1124 #
1125 # east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
1126 # The great circle line from Tabatinga to Porto Acre divides
1127 # east from west Amazonas.
1128 Zone America/Manaus     -4:00:04 -      LMT     1914
1129                         -4:00   Brazil  AM%sT   1988 Sep 12
1130                         -4:00   -       AMT     1993 Sep 28
1131                         -4:00   Brazil  AM%sT   1994 Sep 22
1132                         -4:00   -       AMT
1133 #
1134 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1135 #       Eirunepe, Envira, Ipixuna
1136 Zone America/Eirunepe   -4:39:28 -      LMT     1914
1137                         -5:00   Brazil  AC%sT   1988 Sep 12
1138                         -5:00   -       ACT     1993 Sep 28
1139                         -5:00   Brazil  AC%sT   1994 Sep 22
1140                         -5:00   -       ACT     2008 Jun 24 00:00
1141                         -4:00   -       AMT
1142 #
1143 # Acre (AC)
1144 Zone America/Rio_Branco -4:31:12 -      LMT     1914
1145                         -5:00   Brazil  AC%sT   1988 Sep 12
1146                         -5:00   -       ACT     2008 Jun 24 00:00
1147                         -4:00   -       AMT
1148 
1149 # Chile
1150 
1151 # From Eduardo Krell (1995-10-19):
1152 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1153 # of October....  The law is the same for March and October.
1154 # (1998-09-29):
1155 # Because of the drought this year, the government decided to go into
1156 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1157 # (unless there's another dry season next year, I guess).
1158 
1159 # From Julio I. Pacheco Troncoso (1999-03-18):
1160 # Because of the same drought, the government decided to end DST later,
1161 # on April 3, (one-time change).
1162 
1163 # From Oscar van Vlijmen (2006-10-08):
1164 # http://www.horaoficial.cl/cambio.htm
1165 
1166 # From Jesper Norgaard Welen (2006-10-08):
1167 # I think that there are some obvious mistakes in the suggested link
1168 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1169 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1170 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
1171 # anyhow it clears up some doubts too.
1172 
1173 # From Paul Eggert (2006-12-27):
1174 # The following data for Chile and America/Santiago are from
1175 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1176 # Jesper Norgaard Welen.  The data for Pacific/Easter are from Shanks
1177 # & Pottenger, except with DST transitions after 1932 cloned from
1178 # America/Santiago.  The pre-1980 Pacific/Easter data are dubious,
1179 # but we have no other source.
1180 
1181 # From German Poo-Caaman~o (2008-03-03):
1182 # Due to drought, Chile extends Daylight Time in three weeks.  This
1183 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1184 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1185 # The Supreme Decree is located at 
1186 # <a href="http://www.shoa.cl/servicios/supremo316.pdf">
1187 # http://www.shoa.cl/servicios/supremo316.pdf
1188 # </a>
1189 # and the instructions for 2008 are located in:
1190 # <a href="http://www.horaoficial.cl/cambio.htm">
1191 # http://www.horaoficial.cl/cambio.htm
1192 # </a>.
1193 
1194 # From Jose Miguel Garrido (2008-03-05):
1195 # ...
1196 # You could see the announces of the change on 
1197 # <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
1198 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1199 # </a>.
1200 
1201 # From Angel Chiang (2010-03-04):
1202 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1203 # <a href="http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098">
1204 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1205 # </a>
1206 # (in Spanish, last paragraph).
1207 #
1208 # This is breaking news. There should be more information available later.
1209 
1210 # From Arthur Daivd Olson (2010-03-06):
1211 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1212 
1213 # From Glenn Eychaner (2011-03-02): [geychaner@mac.com]
1214 # It appears that the Chilean government has decided to postpone the
1215 # change from summer time to winter time again, by three weeks to April
1216 # 2nd:
1217 # <a href="http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651">
1218 # http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651
1219 # </a>
1220 #
1221 # This is not yet reflected in the offical "cambio de hora" site, but
1222 # probably will be soon:
1223 # <a href="http://www.horaoficial.cl/cambio.htm">
1224 # http://www.horaoficial.cl/cambio.htm
1225 # </a>
1226 
1227 # From Arthur David Olson (2011-03-02):
1228 # The emol.com article mentions a water shortage as the cause of the
1229 # postponement, which may mean that it's not a permanent change.
1230 
1231 # From Glenn Eychaner (2011-03-28):
1232 # The article:
1233 # <a href="http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}">
1234 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1235 # </a>
1236 #
1237 # In English:
1238 # Chile's clocks will go back an hour this year on the 7th of May instead
1239 # of this Saturday. They will go forward again the 3rd Saturday in
1240 # August, not in October as they have since 1968. This is a pilot plan
1241 # which will be reevaluated in 2012.
1242 
1243 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1244 # As stated in the website of the Chilean Energy Ministry
1245 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1246 # The Chilean Government has decided to postpone the entrance into winter time
1247 # (to leave DST) from March 11 2012 to April 28th 2012. The decision has not
1248 # been yet formalized but it will within the next days.
1249 # Quote from the website communication:
1250 #
1251 # 6. For the year 2012, the dates of entry into winter time will be as follows:
1252 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1253 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1254 # of the same day.
1255 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1256 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1257 # 01:00 on September 2.
1258 #
1259 # Note that...this is yet another "temporary" change that will be reevaluated
1260 # AGAIN in 2013.
1261 
1262 # NOTE: ChileAQ rules for Antarctic bases are stored separately in the
1263 # 'antarctica' file.
1264 
1265 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1266 Rule    Chile   1927    1932    -       Sep      1      0:00    1:00    S
1267 Rule    Chile   1928    1932    -       Apr      1      0:00    0       -
1268 Rule    Chile   1942    only    -       Jun      1      4:00u   0       -
1269 Rule    Chile   1942    only    -       Aug      1      5:00u   1:00    S
1270 Rule    Chile   1946    only    -       Jul     15      4:00u   1:00    S
1271 Rule    Chile   1946    only    -       Sep      1      3:00u   0:00    -
1272 Rule    Chile   1947    only    -       Apr      1      4:00u   0       -
1273 Rule    Chile   1968    only    -       Nov      3      4:00u   1:00    S
1274 Rule    Chile   1969    only    -       Mar     30      3:00u   0       -
1275 Rule    Chile   1969    only    -       Nov     23      4:00u   1:00    S
1276 Rule    Chile   1970    only    -       Mar     29      3:00u   0       -
1277 Rule    Chile   1971    only    -       Mar     14      3:00u   0       -
1278 Rule    Chile   1970    1972    -       Oct     Sun>=9       4:00u   1:00    S
1279 Rule    Chile   1972    1986    -       Mar     Sun>=9       3:00u   0       -
1280 Rule    Chile   1973    only    -       Sep     30      4:00u   1:00    S
1281 Rule    Chile   1974    1987    -       Oct     Sun>=9       4:00u   1:00    S
1282 Rule    Chile   1987    only    -       Apr     12      3:00u   0       -
1283 Rule    Chile   1988    1989    -       Mar     Sun>=9       3:00u   0       -
1284 Rule    Chile   1988    only    -       Oct     Sun>=1       4:00u   1:00    S
1285 Rule    Chile   1989    only    -       Oct     Sun>=9       4:00u   1:00    S
1286 Rule    Chile   1990    only    -       Mar     18      3:00u   0       -
1287 Rule    Chile   1990    only    -       Sep     16      4:00u   1:00    S
1288 Rule    Chile   1991    1996    -       Mar     Sun>=9       3:00u   0       -
1289 Rule    Chile   1991    1997    -       Oct     Sun>=9       4:00u   1:00    S
1290 Rule    Chile   1997    only    -       Mar     30      3:00u   0       -
1291 Rule    Chile   1998    only    -       Mar     Sun>=9       3:00u   0       -
1292 Rule    Chile   1998    only    -       Sep     27      4:00u   1:00    S
1293 Rule    Chile   1999    only    -       Apr      4      3:00u   0       -
1294 Rule    Chile   1999    2010    -       Oct     Sun>=9       4:00u   1:00    S
1295 Rule    Chile   2000    2007    -       Mar     Sun>=9       3:00u   0       -
1296 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
1297 # which is used below in specifying the transition.
1298 Rule    Chile   2008    only    -       Mar     30      3:00u   0       -
1299 Rule    Chile   2009    only    -       Mar     Sun>=9       3:00u   0       -
1300 Rule    Chile   2010    only    -       Apr     Sun>=1       3:00u   0       -
1301 Rule    Chile   2011    only    -       May     Sun>=2       3:00u   0       -
1302 Rule    Chile   2011    only    -       Aug     Sun>=16      4:00u   1:00    S
1303 Rule    Chile   2012    only    -       Apr     Sun>=23      3:00u   0       -
1304 Rule    Chile   2012    only    -       Sep     Sun>=2       4:00u   1:00    S
1305 Rule    Chile   2013    max     -       Mar     Sun>=9       3:00u   0       -
1306 Rule    Chile   2013    max     -       Oct     Sun>=9       4:00u   1:00    S
1307 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1308 # (1996-09) says 1998-03-08.  Ignore these.
1309 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1310 Zone America/Santiago   -4:42:46 -      LMT     1890
1311                         -4:42:46 -      SMT     1910        # Santiago Mean Time
1312                         -5:00   -       CLT     1916 Jul  1 # Chile Time
1313                         -4:42:46 -      SMT     1918 Sep  1 # Santiago Mean Time
1314                         -4:00   -       CLT     1919 Jul  1 # Chile Time
1315                         -4:42:46 -      SMT     1927 Sep  1 # Santiago Mean Time
1316                         -5:00   Chile   CL%sT   1947 May 22 # Chile Time
1317                         -4:00   Chile   CL%sT
1318 Zone Pacific/Easter     -7:17:44 -      LMT     1890
1319                         -7:17:28 -      EMT     1932 Sep    # Easter Mean Time
1320                         -7:00   Chile   EAS%sT  1982 Mar 13 21:00 # Easter I Time
1321                         -6:00   Chile   EAS%sT
1322 #
1323 # Sala y Gomez Island is like Pacific/Easter.
1324 # Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1325 # San Felix, and Antarctic bases, are like America/Santiago.
1326 
1327 # Colombia
1328 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1329 Rule    CO      1992    only    -       May      3      0:00    1:00    S
1330 Rule    CO      1993    only    -       Apr      4      0:00    0       -
1331 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1332 Zone    America/Bogota  -4:56:20 -      LMT     1884 Mar 13
1333                         -4:56:20 -      BMT     1914 Nov 23 # Bogota Mean Time
1334                         -5:00   CO      CO%sT   # Colombia Time
1335 # Malpelo, Providencia, San Andres
1336 # no information; probably like America/Bogota
1337 
1338 # Curacao
1339 #
1340 # From Paul Eggert (2006-03-22):
1341 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1342 # -4:00 since standard time was introduced on 1912-03-02; and that
1343 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1344 # 1912-02-02 to 1965-01-01.  The former is dubious, since S&P also say
1345 # Saba Island has been like Curacao.
1346 # This all predates our 1970 cutoff, though.
1347 #
1348 # By July 2007 Curacao and St Maarten are planned to become
1349 # associated states within the Netherlands, much like Aruba;
1350 # Bonaire, Saba and St Eustatius would become directly part of the
1351 # Netherlands as Kingdom Islands.  This won't affect their time zones
1352 # though, as far as we know.
1353 #
1354 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1355 Zone    America/Curacao -4:35:44 -      LMT     1912 Feb 12     # Willemstad
1356                         -4:30   -       ANT     1965 # Netherlands Antilles Time
1357                         -4:00   -       AST
1358 
1359 # From Arthur David Olson (2011-06-15):
1360 # At least for now, use links for places with new iso3166 codes.
1361 # The name "Lower Prince's Quarter" is both longer than fourteen charaters
1362 # and contains an apostrophe; use "Lower_Princes" below.
1363 
1364 Link    America/Curacao America/Lower_Princes # Sint Maarten
1365 Link    America/Curacao America/Kralendijk # Bonaire, Sint Estatius and Saba
1366 
1367 # Ecuador
1368 #
1369 # From Paul Eggert (2007-03-04):
1370 # Apparently Ecuador had a failed experiment with DST in 1992.
1371 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1372 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1373 # talk about "hora Sixto".  Leave this alone for now, as we have no data.
1374 #
1375 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1376 Zone America/Guayaquil  -5:19:20 -      LMT     1890
1377                         -5:14:00 -      QMT     1931 # Quito Mean Time
1378                         -5:00   -       ECT          # Ecuador Time
1379 Zone Pacific/Galapagos  -5:58:24 -      LMT     1931 # Puerto Baquerizo Moreno
1380                         -5:00   -       ECT     1986
1381                         -6:00   -       GALT         # Galapagos Time
1382 
1383 # Falklands
1384 
1385 # From Paul Eggert (2006-03-22):
1386 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1387 # the IATA gives 1996-09-08.  Go with Shanks & Pottenger.
1388 
1389 # From Falkland Islands Government Office, London (2001-01-22)
1390 # via Jesper Norgaard:
1391 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1392 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1393 # September.  It is anticipated that the clocks will revert back at 2
1394 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1395 # Sunday 1 September.
1396 
1397 # From Rives McDow (2001-02-13):
1398 #
1399 # I have communicated several times with people there, and the last
1400 # time I had communications that was helpful was in 1998.  Here is
1401 # what was said then:
1402 #
1403 # "The general rule was that Stanley used daylight saving and the Camp
1404 # did not. However for various reasons many people in the Camp have
1405 # started to use daylight saving (known locally as 'Stanley Time')
1406 # There is no rule as to who uses daylight saving - it is a matter of
1407 # personal choice and so it is impossible to draw a map showing who
1408 # uses it and who does not. Any list would be out of date as soon as
1409 # it was produced. This year daylight saving ended on April 18/19th
1410 # and started again on September 12/13th.  I do not know what the rule
1411 # is, but can find out if you like.  We do not change at the same time
1412 # as UK or Chile."
1413 #
1414 # I did have in my notes that the rule was "Second Saturday in Sep at
1415 # 0:00 until third Saturday in Apr at 0:00".  I think that this does
1416 # not agree in some cases with Shanks; is this true?
1417 #
1418 # Also, there is no mention in the list that some areas in the
1419 # Falklands do not use DST.  I have found in my communications there
1420 # that these areas are on the western half of East Falkland and all of
1421 # West Falkland.  Stanley is the only place that consistently observes
1422 # DST.  Again, as in other places in the world, the farmers don't like
1423 # it.  West Falkland is almost entirely sheep farmers.
1424 #
1425 # I know one lady there that keeps a list of which farm keeps DST and
1426 # which doesn't each year.  She runs a shop in Stanley, and says that
1427 # the list changes each year.  She uses it to communicate to her
1428 # customers, catching them when they are home for lunch or dinner.
1429 
1430 # From Paul Eggert (2001-03-05):
1431 # For now, we'll just record the time in Stanley, since we have no
1432 # better info.
1433 
1434 # From Steffen Thorsen (2011-04-01):
1435 # The Falkland Islands will not turn back clocks this winter, but stay on
1436 # daylight saving time.
1437 #
1438 # One source:
1439 # <a href="http://www.falklandnews.com/public/story.cfm?get=5914&source=3">
1440 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1441 # </a>
1442 #
1443 # We have gotten this confirmed by a clerk of the legislative assembly:
1444 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1445 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1446 # hours) on the first Sunday of September at 0200hrs.
1447 #
1448 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1449 # will not revert to local mean time, but clocks will remain on Summer
1450 # time (UTC/GMT - 3 hours) throughout the whole of 2011.  Any long term
1451 # change to local time following the trial period will be notified.
1452 #
1453 # From Andrew Newman (2012-02-24)
1454 # A letter from Justin McPhee, Chief Executive,
1455 # Cable & Wireless Falkland Islands (dated 2012-02-22)
1456 # states...
1457 #   The current Atlantic/Stanley entry under South America expects the
1458 #   clocks to go back to standard Falklands Time (FKT) on the 15th April.
1459 #   The database entry states that in 2011 Stanley was staying on fixed
1460 #   summer time on a trial basis only.  FIG need to contact IANA and/or
1461 #   the maintainers of the database to inform them we're adopting
1462 #   the same policy this year and suggest recommendations for future years.
1463 #
1464 # For now we will assume permanent summer time for the Falklands
1465 # until advised differently (to apply for 2012 and beyond, after the 2011
1466 # experiment was apparently successful.)
1467 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1468 Rule    Falk    1937    1938    -       Sep     lastSun 0:00    1:00    S
1469 Rule    Falk    1938    1942    -       Mar     Sun>=19      0:00    0       -
1470 Rule    Falk    1939    only    -       Oct     1       0:00    1:00    S
1471 Rule    Falk    1940    1942    -       Sep     lastSun 0:00    1:00    S
1472 Rule    Falk    1943    only    -       Jan     1       0:00    0       -
1473 Rule    Falk    1983    only    -       Sep     lastSun 0:00    1:00    S
1474 Rule    Falk    1984    1985    -       Apr     lastSun 0:00    0       -
1475 Rule    Falk    1984    only    -       Sep     16      0:00    1:00    S
1476 Rule    Falk    1985    2000    -       Sep     Sun>=9       0:00    1:00    S
1477 Rule    Falk    1986    2000    -       Apr     Sun>=16      0:00    0       -
1478 Rule    Falk    2001    2010    -       Apr     Sun>=15      2:00    0       -
1479 Rule    Falk    2001    2010    -       Sep     Sun>=1       2:00    1:00    S
1480 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1481 Zone Atlantic/Stanley   -3:51:24 -      LMT     1890
1482                         -3:51:24 -      SMT     1912 Mar 12  # Stanley Mean Time
1483                         -4:00   Falk    FK%sT   1983 May     # Falkland Is Time
1484                         -3:00   Falk    FK%sT   1985 Sep 15
1485                         -4:00   Falk    FK%sT   2010 Sep 5 02:00
1486                         -3:00   -       FKST
1487 
1488 # French Guiana
1489 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1490 Zone America/Cayenne    -3:29:20 -      LMT     1911 Jul
1491                         -4:00   -       GFT     1967 Oct # French Guiana Time
1492                         -3:00   -       GFT
1493 
1494 # Guyana
1495 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1496 Zone    America/Guyana  -3:52:40 -      LMT     1915 Mar        # Georgetown
1497                         -3:45   -       GBGT    1966 May 26 # Br Guiana Time
1498                         -3:45   -       GYT     1975 Jul 31 # Guyana Time
1499                         -3:00   -       GYT     1991
1500 # IATA SSIM (1996-06) says -4:00.  Assume a 1991 switch.
1501                         -4:00   -       GYT
1502 
1503 # Paraguay
1504 # From Paul Eggert (2006-03-22):
1505 # Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1506 # and autumn transitions are from 00:00 -> 23:00.  Go with pre-1999
1507 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1508 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1509 Rule    Para    1975    1988    -       Oct      1      0:00    1:00    S
1510 Rule    Para    1975    1978    -       Mar      1      0:00    0       -
1511 Rule    Para    1979    1991    -       Apr      1      0:00    0       -
1512 Rule    Para    1989    only    -       Oct     22      0:00    1:00    S
1513 Rule    Para    1990    only    -       Oct      1      0:00    1:00    S
1514 Rule    Para    1991    only    -       Oct      6      0:00    1:00    S
1515 Rule    Para    1992    only    -       Mar      1      0:00    0       -
1516 Rule    Para    1992    only    -       Oct      5      0:00    1:00    S
1517 Rule    Para    1993    only    -       Mar     31      0:00    0       -
1518 Rule    Para    1993    1995    -       Oct      1      0:00    1:00    S
1519 Rule    Para    1994    1995    -       Feb     lastSun 0:00    0       -
1520 Rule    Para    1996    only    -       Mar      1      0:00    0       -
1521 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1522 # From Steffen Thorsen (2000-10-02):
1523 # I have three independent reports that Paraguay changed to DST this Sunday
1524 # (10-01).
1525 #
1526 # Translated by Gwillim Law (2001-02-27) from
1527 # <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1528 # Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1529 # </a>:
1530 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1531 # fulfillment of Decree No. 7,273 of the Executive Power....  The time change
1532 # system has been operating for several years.  Formerly there was a separate
1533 # decree each year; the new law has the same effect, but permanently.  Every
1534 # year, the time will change on the first Sunday of October; likewise, the
1535 # clock will be set back on the first Sunday of March.
1536 #
1537 Rule    Para    1996    2001    -       Oct     Sun>=1       0:00    1:00    S
1538 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1539 Rule    Para    1997    only    -       Feb     lastSun 0:00    0       -
1540 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1541 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1542 Rule    Para    1998    2001    -       Mar     Sun>=1       0:00    0       -
1543 # From Rives McDow (2002-02-28):
1544 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1545 # dst method to be from the first Sunday in September to the first Sunday in
1546 # April.
1547 Rule    Para    2002    2004    -       Apr     Sun>=1       0:00    0       -
1548 Rule    Para    2002    2003    -       Sep     Sun>=1       0:00    1:00    S
1549 #
1550 # From Jesper Norgaard Welen (2005-01-02):
1551 # There are several sources that claim that Paraguay made
1552 # a timezone rule change in autumn 2004.
1553 # From Steffen Thorsen (2005-01-05):
1554 # Decree 1,867 (2004-03-05)
1555 # From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1556 # <http://www.presidencia.gov.py/decretos/D1867.pdf>
1557 Rule    Para    2004    2009    -       Oct     Sun>=15      0:00    1:00    S
1558 Rule    Para    2005    2009    -       Mar     Sun>=8       0:00    0       -
1559 # From Carlos Raul Perasso (2010-02-18):
1560 # By decree number 3958 issued yesterday (
1561 # <a href="http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf">
1562 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1563 # </a>
1564 # )
1565 # Paraguay changes its DST schedule, postponing the March rule to April and
1566 # modifying the October date. The decree reads:
1567 # ...
1568 # Art. 1. It is hereby established that from the second Sunday of the month of
1569 # April of this year (2010), the official time is to be set back 60 minutes,
1570 # and that on the first Sunday of the month of October, it is to be set
1571 # forward 60 minutes, in all the territory of the Paraguayan Republic.
1572 # ...
1573 Rule    Para    2010    max     -       Oct     Sun>=1       0:00    1:00    S
1574 Rule    Para    2010    max     -       Apr     Sun>=8       0:00    0       -
1575 
1576 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1577 Zone America/Asuncion   -3:50:40 -      LMT     1890
1578                         -3:50:40 -      AMT     1931 Oct 10 # Asuncion Mean Time
1579                         -4:00   -       PYT     1972 Oct # Paraguay Time
1580                         -3:00   -       PYT     1974 Apr
1581                         -4:00   Para    PY%sT
1582 
1583 # Peru
1584 #
1585 # <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1586 # From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1587 # When we were in Peru in 1985-1986, they apparently switched over
1588 # sometime between December 29 and January 3 while we were on the Amazon.
1589 #
1590 # From Paul Eggert (2006-03-22):
1591 # Shanks & Pottenger don't have this transition.  Assume 1986 was like 1987.
1592 
1593 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1594 Rule    Peru    1938    only    -       Jan      1      0:00    1:00    S
1595 Rule    Peru    1938    only    -       Apr      1      0:00    0       -
1596 Rule    Peru    1938    1939    -       Sep     lastSun 0:00    1:00    S
1597 Rule    Peru    1939    1940    -       Mar     Sun>=24      0:00    0       -
1598 Rule    Peru    1986    1987    -       Jan      1      0:00    1:00    S
1599 Rule    Peru    1986    1987    -       Apr      1      0:00    0       -
1600 Rule    Peru    1990    only    -       Jan      1      0:00    1:00    S
1601 Rule    Peru    1990    only    -       Apr      1      0:00    0       -
1602 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1603 Rule    Peru    1994    only    -       Jan      1      0:00    1:00    S
1604 Rule    Peru    1994    only    -       Apr      1      0:00    0       -
1605 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1606 Zone    America/Lima    -5:08:12 -      LMT     1890
1607                         -5:08:36 -      LMT     1908 Jul 28 # Lima Mean Time?
1608                         -5:00   Peru    PE%sT   # Peru Time
1609 
1610 # South Georgia
1611 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1612 Zone Atlantic/South_Georgia -2:26:08 -  LMT     1890            # Grytviken
1613                         -2:00   -       GST     # South Georgia Time
1614 
1615 # South Sandwich Is
1616 # uninhabited; scientific personnel have wintered
1617 
1618 # Suriname
1619 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1620 Zone America/Paramaribo -3:40:40 -      LMT     1911
1621                         -3:40:52 -      PMT     1935     # Paramaribo Mean Time
1622                         -3:40:36 -      PMT     1945 Oct # The capital moved?
1623                         -3:30   -       NEGT    1975 Nov 20 # Dutch Guiana Time
1624                         -3:30   -       SRT     1984 Oct # Suriname Time
1625                         -3:00   -       SRT
1626 
1627 # Trinidad and Tobago
1628 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1629 Zone America/Port_of_Spain -4:06:04 -   LMT     1912 Mar 2
1630                         -4:00   -       AST
1631 
1632 # Uruguay
1633 # From Paul Eggert (1993-11-18):
1634 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1635 # From Shanks & Pottenger:
1636 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1637 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1638 Rule    Uruguay 1923    only    -       Oct      2       0:00   0:30    HS
1639 Rule    Uruguay 1924    1926    -       Apr      1       0:00   0       -
1640 Rule    Uruguay 1924    1925    -       Oct      1       0:00   0:30    HS
1641 Rule    Uruguay 1933    1935    -       Oct     lastSun  0:00   0:30    HS
1642 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1643 Rule    Uruguay 1934    1936    -       Mar     Sat>=25      23:30s  0       -
1644 Rule    Uruguay 1936    only    -       Nov      1       0:00   0:30    HS
1645 Rule    Uruguay 1937    1941    -       Mar     lastSun  0:00   0       -
1646 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1647 Rule    Uruguay 1937    1940    -       Oct     lastSun  0:00   0:30    HS
1648 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1649 # and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1650 Rule    Uruguay 1941    only    -       Aug      1       0:00   0:30    HS
1651 Rule    Uruguay 1942    only    -       Jan      1       0:00   0       -
1652 Rule    Uruguay 1942    only    -       Dec     14       0:00   1:00    S
1653 Rule    Uruguay 1943    only    -       Mar     14       0:00   0       -
1654 Rule    Uruguay 1959    only    -       May     24       0:00   1:00    S
1655 Rule    Uruguay 1959    only    -       Nov     15       0:00   0       -
1656 Rule    Uruguay 1960    only    -       Jan     17       0:00   1:00    S
1657 Rule    Uruguay 1960    only    -       Mar      6       0:00   0       -
1658 Rule    Uruguay 1965    1967    -       Apr     Sun>=1        0:00   1:00    S
1659 Rule    Uruguay 1965    only    -       Sep     26       0:00   0       -
1660 Rule    Uruguay 1966    1967    -       Oct     31       0:00   0       -
1661 Rule    Uruguay 1968    1970    -       May     27       0:00   0:30    HS
1662 Rule    Uruguay 1968    1970    -       Dec      2       0:00   0       -
1663 Rule    Uruguay 1972    only    -       Apr     24       0:00   1:00    S
1664 Rule    Uruguay 1972    only    -       Aug     15       0:00   0       -
1665 Rule    Uruguay 1974    only    -       Mar     10       0:00   0:30    HS
1666 Rule    Uruguay 1974    only    -       Dec     22       0:00   1:00    S
1667 Rule    Uruguay 1976    only    -       Oct      1       0:00   0       -
1668 Rule    Uruguay 1977    only    -       Dec      4       0:00   1:00    S
1669 Rule    Uruguay 1978    only    -       Apr      1       0:00   0       -
1670 Rule    Uruguay 1979    only    -       Oct      1       0:00   1:00    S
1671 Rule    Uruguay 1980    only    -       May      1       0:00   0       -
1672 Rule    Uruguay 1987    only    -       Dec     14       0:00   1:00    S
1673 Rule    Uruguay 1988    only    -       Mar     14       0:00   0       -
1674 Rule    Uruguay 1988    only    -       Dec     11       0:00   1:00    S
1675 Rule    Uruguay 1989    only    -       Mar     12       0:00   0       -
1676 Rule    Uruguay 1989    only    -       Oct     29       0:00   1:00    S
1677 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1678 # and that 1992/3's DST was from 10-25 to 03-01.  Go with IATA.
1679 Rule    Uruguay 1990    1992    -       Mar     Sun>=1        0:00   0       -
1680 Rule    Uruguay 1990    1991    -       Oct     Sun>=21       0:00   1:00    S
1681 Rule    Uruguay 1992    only    -       Oct     18       0:00   1:00    S
1682 Rule    Uruguay 1993    only    -       Feb     28       0:00   0       -
1683 # From Eduardo Cota (2004-09-20):
1684 # The uruguayan government has decreed a change in the local time....
1685 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1686 Rule    Uruguay 2004    only    -       Sep     19       0:00   1:00    S
1687 # From Steffen Thorsen (2005-03-11):
1688 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1689 # save energy ... it was postponed two weeks....
1690 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1691 Rule    Uruguay 2005    only    -       Mar     27       2:00   0       -
1692 # From Eduardo Cota (2005-09-27):
1693 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1694 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1695 # 02:00 local time, official time in Uruguay will be at GMT -2.
1696 Rule    Uruguay 2005    only    -       Oct      9       2:00   1:00    S
1697 Rule    Uruguay 2006    only    -       Mar     12       2:00   0       -
1698 # From Jesper Norgaard Welen (2006-09-06):
1699 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1700 Rule    Uruguay 2006    max     -       Oct     Sun>=1        2:00   1:00    S
1701 Rule    Uruguay 2007    max     -       Mar     Sun>=8        2:00   0       -
1702 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1703 Zone America/Montevideo -3:44:44 -      LMT     1898 Jun 28
1704                         -3:44:44 -      MMT     1920 May  1     # Montevideo MT
1705                         -3:30   Uruguay UY%sT   1942 Dec 14     # Uruguay Time
1706                         -3:00   Uruguay UY%sT
1707 
1708 # Venezuela
1709 #
1710 # From John Stainforth (2007-11-28):
1711 # ... the change for Venezuela originally expected for 2007-12-31 has
1712 # been brought forward to 2007-12-09.  The official announcement was
1713 # published today in the "Gaceta Oficial de la Republica Bolivariana
1714 # de Venezuela, numero 38.819" (official document for all laws or
1715 # resolution publication)
1716 # http://www.globovision.com/news.php?nid=72208
1717 
1718 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1719 Zone    America/Caracas -4:27:44 -      LMT     1890
1720                         -4:27:40 -      CMT     1912 Feb 12 # Caracas Mean Time?
1721                         -4:30   -       VET     1965         # Venezuela Time
1722                         -4:00   -       VET     2007 Dec  9 03:00
1723                         -4:30   -       VET