test/jdk/sun/util/calendar/zi/tzdata/southamerica
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     1 #
       
     2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
       
     3 #
       
     4 # This code is free software; you can redistribute it and/or modify it
       
     5 # under the terms of the GNU General Public License version 2 only, as
       
     6 # published by the Free Software Foundation.
       
     7 #
       
     8 # This code is distributed in the hope that it will be useful, but WITHOUT
       
     9 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
       
    10 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
       
    11 # version 2 for more details (a copy is included in the LICENSE file that
       
    12 # accompanied this code).
       
    13 #
       
    14 # You should have received a copy of the GNU General Public License version
       
    15 # 2 along with this work; if not, write to the Free Software Foundation,
       
    16 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
       
    17 #
       
    18 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
       
    19 # or visit www.oracle.com if you need additional information or have any
       
    20 # questions.
       
    21 #
       
    22 # tzdb data for South America and environs
       
    23 
       
    24 # This file is in the public domain, so clarified as of
       
    25 # 2009-05-17 by Arthur David Olson.
       
    26 
       
    27 # This file is by no means authoritative; if you think you know better,
       
    28 # go ahead and edit the file (and please send any changes to
       
    29 # tz@iana.org for general use in the future).  For more, please see
       
    30 # the file CONTRIBUTING in the tz distribution.
       
    31 
       
    32 # From Paul Eggert (2016-12-05):
       
    33 #
       
    34 # Unless otherwise specified, the source for data through 1990 is:
       
    35 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
       
    36 # San Diego: ACS Publications, Inc. (2003).
       
    37 # Unfortunately this book contains many errors and cites no sources.
       
    38 #
       
    39 # Many years ago Gwillim Law wrote that a good source
       
    40 # for time zone data was the International Air Transport
       
    41 # Association's Standard Schedules Information Manual (IATA SSIM),
       
    42 # published semiannually.  Law sent in several helpful summaries
       
    43 # of the IATA's data after 1990.  Except where otherwise noted,
       
    44 # IATA SSIM is the source for entries after 1990.
       
    45 #
       
    46 # For data circa 1899, a common source is:
       
    47 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
       
    48 # https://www.jstor.org/stable/1774359
       
    49 #
       
    50 # These tables use numeric abbreviations like -03 and -0330 for
       
    51 # integer hour and minute UT offsets.  Although earlier editions used
       
    52 # alphabetic time zone abbreviations, these abbreviations were
       
    53 # invented and did not reflect common practice.
       
    54 
       
    55 ###############################################################################
       
    56 
       
    57 ###############################################################################
       
    58 
       
    59 # Argentina
       
    60 
       
    61 # From Bob Devine (1988-01-28):
       
    62 # Argentina: first Sunday in October to first Sunday in April since 1976.
       
    63 # Double Summer time from 1969 to 1974.  Switches at midnight.
       
    64 
       
    65 # From U. S. Naval Observatory (1988-01-19):
       
    66 # ARGENTINA           3 H BEHIND   UTC
       
    67 
       
    68 # From Hernan G. Otero (1995-06-26):
       
    69 # I am sending modifications to the Argentine time zone table...
       
    70 # AR was chosen because they are the ISO letters that represent Argentina.
       
    71 
       
    72 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
       
    73 Rule	Arg	1930	only	-	Dec	 1	0:00	1:00	-
       
    74 Rule	Arg	1931	only	-	Apr	 1	0:00	0	-
       
    75 Rule	Arg	1931	only	-	Oct	15	0:00	1:00	-
       
    76 Rule	Arg	1932	1940	-	Mar	 1	0:00	0	-
       
    77 Rule	Arg	1932	1939	-	Nov	 1	0:00	1:00	-
       
    78 Rule	Arg	1940	only	-	Jul	 1	0:00	1:00	-
       
    79 Rule	Arg	1941	only	-	Jun	15	0:00	0	-
       
    80 Rule	Arg	1941	only	-	Oct	15	0:00	1:00	-
       
    81 Rule	Arg	1943	only	-	Aug	 1	0:00	0	-
       
    82 Rule	Arg	1943	only	-	Oct	15	0:00	1:00	-
       
    83 Rule	Arg	1946	only	-	Mar	 1	0:00	0	-
       
    84 Rule	Arg	1946	only	-	Oct	 1	0:00	1:00	-
       
    85 Rule	Arg	1963	only	-	Oct	 1	0:00	0	-
       
    86 Rule	Arg	1963	only	-	Dec	15	0:00	1:00	-
       
    87 Rule	Arg	1964	1966	-	Mar	 1	0:00	0	-
       
    88 Rule	Arg	1964	1966	-	Oct	15	0:00	1:00	-
       
    89 Rule	Arg	1967	only	-	Apr	 2	0:00	0	-
       
    90 Rule	Arg	1967	1968	-	Oct	Sun>=1	0:00	1:00	-
       
    91 Rule	Arg	1968	1969	-	Apr	Sun>=1	0:00	0	-
       
    92 Rule	Arg	1974	only	-	Jan	23	0:00	1:00	-
       
    93 Rule	Arg	1974	only	-	May	 1	0:00	0	-
       
    94 Rule	Arg	1988	only	-	Dec	 1	0:00	1:00	-
       
    95 #
       
    96 # From Hernan G. Otero (1995-06-26):
       
    97 # These corrections were contributed by InterSoft Argentina S.A.,
       
    98 # obtaining the data from the:
       
    99 # Talleres de Hidrografía Naval Argentina
       
   100 # (Argentine Naval Hydrography Institute)
       
   101 Rule	Arg	1989	1993	-	Mar	Sun>=1	0:00	0	-
       
   102 Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	-
       
   103 #
       
   104 # From Hernan G. Otero (1995-06-26):
       
   105 # From this moment on, the law that mandated the daylight saving
       
   106 # time corrections was derogated and no more modifications
       
   107 # to the time zones (for daylight saving) are now made.
       
   108 #
       
   109 # From Rives McDow (2000-01-10):
       
   110 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
       
   111 # which did not result in the switch of a time zone, as they stayed 9 hours
       
   112 # from the International Date Line.
       
   113 Rule	Arg	1999	only	-	Oct	Sun>=1	0:00	1:00	-
       
   114 # From Paul Eggert (2007-12-28):
       
   115 # DST was set to expire on March 5, not March 3, but since it was converted
       
   116 # to standard time on March 3 it's more convenient for us to pretend that
       
   117 # it ended on March 3.
       
   118 Rule	Arg	2000	only	-	Mar	3	0:00	0	-
       
   119 #
       
   120 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
       
   121 # We just checked with our São Paulo office and they say the government of
       
   122 # Argentina decided not to become one of the countries that go on or off DST.
       
   123 # So Buenos Aires should be -3 hours from GMT at all times.
       
   124 #
       
   125 # From Fabián L. Arce Jofré (2000-04-04):
       
   126 # The law that claimed DST for Argentina was derogated by President Fernando
       
   127 # de la Rúa on March 2, 2000, because it would make people spend more energy
       
   128 # in the winter time, rather than less.  The change took effect on March 3.
       
   129 #
       
   130 # From Mariano Absatz (2001-06-06):
       
   131 # one of the major newspapers here in Argentina said that the 1999
       
   132 # Timezone Law (which never was effectively applied) will (would?) be
       
   133 # in effect.... The article is at
       
   134 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm
       
   135 # ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted
       
   136 # 1999-09-17, and published 1999-09-21.  The official publication is at:
       
   137 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
       
   138 # Regretfully, you have to subscribe (and pay) for the on-line version....
       
   139 #
       
   140 # (2001-06-12):
       
   141 # the timezone for Argentina will not change next Sunday.
       
   142 # Apparently it will do so on Sunday 24th....
       
   143 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm
       
   144 #
       
   145 # (2001-06-25):
       
   146 # Last Friday (yes, the last working day before the date of the change), the
       
   147 # Senate annulled the 1999 law that introduced the changes later postponed.
       
   148 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
       
   149 # It remains the vote of the Deputies..., but it will be the same....
       
   150 # This kind of things had always been done this way in Argentina.
       
   151 # We are still -03:00 all year round in all of the country.
       
   152 #
       
   153 # From Steffen Thorsen (2007-12-21):
       
   154 # A user (Leonardo Chaim) reported that Argentina will adopt DST....
       
   155 # all of the country (all Zone-entries) are affected.  News reports like
       
   156 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
       
   157 # that Argentina will use DST next year as well, from October to
       
   158 # March, although exact rules are not given.
       
   159 #
       
   160 # From Jesper Nørgaard Welen (2007-12-26)
       
   161 # The last hurdle of Argentina DST is over, the proposal was approved in
       
   162 # the lower chamber too (Diputados) with a vote 192 for and 2 against.
       
   163 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
       
   164 # the original scanned proposal, where the dates and the zero hours are
       
   165 # clear and unambiguous...This is the article about final approval:
       
   166 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
       
   167 #
       
   168 # From Paul Eggert (2007-12-22):
       
   169 # For dates after mid-2008, the following rules are my guesses and
       
   170 # are quite possibly wrong, but are more likely than no DST at all.
       
   171 
       
   172 # From Alexander Krivenyshev (2008-09-05):
       
   173 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
       
   174 # Argentina will start DST on Sunday October 19, 2008.
       
   175 #
       
   176 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
       
   177 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
       
   178 
       
   179 # From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07)
       
   180 # via Rodrigo Severo:
       
   181 # Argentinian law No. 25.155 is no longer valid.
       
   182 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
       
   183 # The new one is law No. 26.350
       
   184 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
       
   185 # So there is no summer time in Argentina for now.
       
   186 
       
   187 # From Mariano Absatz (2008-10-20):
       
   188 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST
       
   189 # in Argentina from 2008-10-19 until 2009-03-15.
       
   190 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
       
   191 #
       
   192 
       
   193 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
       
   194 # 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
       
   195 # Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
       
   196 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
       
   197 #
       
   198 # Press release 235 dated Saturday October 18th, from the Government of the
       
   199 # Province of Jujuy saying it will not apply DST either (even when it was not
       
   200 # included in Decree 1705/2008).
       
   201 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
       
   202 
       
   203 # From fullinet (2009-10-18):
       
   204 # As announced in
       
   205 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
       
   206 # (an official .gob.ar) under title: "Sin Cambio de Hora"
       
   207 # (English: "No hour change").
       
   208 #
       
   209 # "Por el momento, el Gobierno Nacional resolvió no modificar la hora
       
   210 # oficial, decisión que estaba en estudio para su implementación el
       
   211 # domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
       
   212 # que la Argentina hoy, en estas condiciones meteorológicas, no necesita
       
   213 # la modificación del huso horario, ya que 2009 nos encuentra con
       
   214 # crecimiento en la producción y distribución energética."
       
   215 
       
   216 Rule	Arg	2007	only	-	Dec	30	0:00	1:00	-
       
   217 Rule	Arg	2008	2009	-	Mar	Sun>=15	0:00	0	-
       
   218 Rule	Arg	2008	only	-	Oct	Sun>=15	0:00	1:00	-
       
   219 
       
   220 # From Mariano Absatz (2004-05-21):
       
   221 # Today it was officially published that the Province of Mendoza is changing
       
   222 # its timezone this winter... starting tomorrow night....
       
   223 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
       
   224 # From Paul Eggert (2004-05-24):
       
   225 # It's Law No. 7,210.  This change is due to a public power emergency, so for
       
   226 # now we'll assume it's for this year only.
       
   227 #
       
   228 # From Paul Eggert (2018-01-31):
       
   229 # Hora de verano para la República Argentina
       
   230 # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
       
   231 # says that standard time in Argentina from 1894-10-31
       
   232 # to 1920-05-01 was -4:16:48.25.  Go with this more-precise value
       
   233 # over Shanks & Pottenger.  It is upward compatible with Milne, who
       
   234 # says Córdoba time was -4:16:48.2.
       
   235 
       
   236 #
       
   237 # From Mariano Absatz (2004-06-05):
       
   238 # These media articles from a major newspaper mostly cover the current state:
       
   239 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
       
   240 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
       
   241 #
       
   242 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
       
   243 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
       
   244 # Apparently, all nine provinces would go back to UTC-03:00 at the same
       
   245 # time in October 17th.
       
   246 #
       
   247 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
       
   248 # Tierra del Fuego, Tucumán.
       
   249 #
       
   250 # From Mariano Absatz (2004-06-14):
       
   251 # ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00
       
   252 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
       
   253 # annoyance with the change is much higher than the power savings obtained....
       
   254 #
       
   255 # From Gwillim Law (2004-06-14):
       
   256 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
       
   257 #     "The time change in Tierra del Fuego was a conflicted decision from
       
   258 #   the start.  The government had decreed that the measure would take
       
   259 #   effect on June 1, but a normative error forced the new time to begin
       
   260 #   three days earlier, from a Saturday to a Sunday....
       
   261 # Our understanding was that the change was originally scheduled to take place
       
   262 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
       
   263 # provinces).  Sunday was May 30, only two days earlier.  So the article
       
   264 # contains a contradiction.  I would give more credence to the Saturday/Sunday
       
   265 # date than the "three days earlier" phrase, and conclude that Tierra del
       
   266 # Fuego set its clocks back at 2004-05-30 00:00.
       
   267 #
       
   268 # From Steffen Thorsen (2004-10-05):
       
   269 # The previous law 7210 which changed the province of Mendoza's time zone
       
   270 # back in May have been modified slightly in a new law 7277, which set the
       
   271 # new end date to 2004-09-26 (original date was 2004-10-17).
       
   272 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
       
   273 #
       
   274 # From Mariano Absatz (2004-10-05):
       
   275 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
       
   276 # Sunday, May 30th and Monday, May 31st.  It changed back to UTC-03:00
       
   277 # at midnight between Saturday, July 24th and Sunday, July 25th....
       
   278 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
       
   279 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
       
   280 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
       
   281 
       
   282 # From Alex Krivenyshev (2008-01-17):
       
   283 # Here are articles that Argentina Province San Luis is planning to end DST
       
   284 # as earlier as upcoming Monday January 21, 2008 or February 2008:
       
   285 #
       
   286 # Provincia argentina retrasa reloj y marca diferencia con resto del país
       
   287 # (Argentine Province delayed clock and mark difference with the rest of the
       
   288 # country)
       
   289 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
       
   290 #
       
   291 # Es inminente que en San Luis atrasen una hora los relojes
       
   292 # (It is imminent in San Luis clocks one hour delay)
       
   293 # https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
       
   294 # http://www.worldtimezone.com/dst_news/dst_news_argentina02.html
       
   295 
       
   296 # From Jesper Nørgaard Welen (2008-01-18):
       
   297 # The page of the San Luis provincial government
       
   298 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
       
   299 # confirms what Alex Krivenyshev has earlier sent to the tz
       
   300 # emailing list about that San Luis plans to return to standard
       
   301 # time much earlier than the rest of the country. It also
       
   302 # confirms that upon request the provinces San Juan and Mendoza
       
   303 # refused to follow San Luis in this change.
       
   304 #
       
   305 # The change is supposed to take place Monday the 21st at 0:00
       
   306 # hours. As far as I understand it if this goes ahead, we need
       
   307 # a new timezone for San Luis (although there are also documented
       
   308 # independent changes in the southamerica file of San Luis in
       
   309 # 1990 and 1991 which has not been confirmed).
       
   310 
       
   311 # From Jesper Nørgaard Welen (2008-01-25):
       
   312 # Unfortunately the below page has become defunct, about the San Luis
       
   313 # time change. Perhaps because it now is part of a group of pages "Most
       
   314 # important pages of 2008."
       
   315 #
       
   316 # You can use
       
   317 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
       
   318 # instead it seems. Or use "Buscador" from the main page of the San Luis
       
   319 # government, and fill in "huso" and click OK, and you will get 3 pages
       
   320 # from which the first one is identical to the above.
       
   321 
       
   322 # From Mariano Absatz (2008-01-28):
       
   323 # I can confirm that the Province of San Luis (and so far only that
       
   324 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
       
   325 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
       
   326 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
       
   327 # (that is, unless they change their mind any minute now).
       
   328 #
       
   329 # So we'll have to add yet another city to 'southamerica' (I think San
       
   330 # Luis city is the mos populated city in the Province, so it'd be
       
   331 # America/Argentina/San_Luis... of course I can't remember if San Luis's
       
   332 # history of particular changes goes along with Mendoza or San Juan :-(
       
   333 # (I only remember not being able to collect hard facts about San Luis
       
   334 # back in 2004, when these provinces changed to UTC-4 for a few days, I
       
   335 # mailed them personally and never got an answer).
       
   336 
       
   337 # From Paul Eggert (2014-08-12):
       
   338 # Unless otherwise specified, data entries are from Shanks & Pottenger through
       
   339 # 1992, from the IATA otherwise.  As noted below, Shanks & Pottenger say that
       
   340 # America/Cordoba split into 6 subregions during 1991/1992, one of which
       
   341 # was America/San_Luis, but we haven't verified this yet so for now we'll
       
   342 # keep America/Cordoba a single region rather than splitting it into the
       
   343 # other 5 subregions.
       
   344 
       
   345 # From Mariano Absatz (2009-03-13):
       
   346 # Yesterday (with our usual 2-day notice) the Province of San Luis
       
   347 # decided that next Sunday instead of "staying" @utc-03:00 they will go
       
   348 # to utc-04:00 until the second Saturday in October...
       
   349 #
       
   350 # The press release is at
       
   351 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
       
   352 # (I couldn't find the decree, but www.sanluis.gov.ar
       
   353 # is the official page for the Province Government.)
       
   354 #
       
   355 # There's also a note in only one of the major national papers ...
       
   356 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
       
   357 #
       
   358 # The press release says [quick and dirty translation]:
       
   359 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis
       
   360 # inhabitants) will have to turn back one hour their clocks
       
   361 #
       
   362 # Since then, San Luis will establish its own Province timezone. Thus,
       
   363 # during 2009, this timezone change will run from 00:00 the third Sunday
       
   364 # in March until 24:00 of the second Saturday in October.
       
   365 
       
   366 # From Mariano Absatz (2009-10-16):
       
   367 # ...the Province of San Luis is a case in itself.
       
   368 #
       
   369 # The Law at
       
   370 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
       
   371 # is ambiguous because establishes a calendar from the 2nd Sunday in
       
   372 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the
       
   373 # complement of that starting on the 2nd Sunday of March at 0:00 and
       
   374 # ending on the 2nd Saturday of March at 24:00.
       
   375 #
       
   376 # This clearly breaks every time the 1st of March or October is a Sunday.
       
   377 #
       
   378 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
       
   379 # Sunday of October and March.
       
   380 #
       
   381 # The problem is that the changes in the rest of the Provinces that did
       
   382 # change in 2007/2008, were made according to the Federal Law and Decrees
       
   383 # that did so on the 3rd Sunday of October and March.
       
   384 #
       
   385 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
       
   386 # (October 11th) at 0:00.
       
   387 #
       
   388 # So I guess a new set of rules, besides "Arg", must be made and the last
       
   389 # America/Argentina/San_Luis entries should change to use these...
       
   390 # ...
       
   391 
       
   392 # From Alexander Krivenyshev (2010-04-09):
       
   393 # According to news reports from El Diario de la República Province San
       
   394 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
       
   395 # after April 11, 2010 - will continue to have same time as rest of
       
   396 # Argentina (UTC-3) (no DST).
       
   397 #
       
   398 # Confirmaron la prórroga del huso horario de verano (Spanish)
       
   399 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
       
   400 # or (some English translation):
       
   401 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
       
   402 
       
   403 # From Mariano Absatz (2010-04-12):
       
   404 # yes...I can confirm this...and given that San Luis keeps calling
       
   405 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
       
   406 # rules...San Luis is still using "Western ARgentina Time" and it got
       
   407 # stuck on Summer daylight savings time even though the summer is over.
       
   408 
       
   409 # From Paul Eggert (2018-01-23):
       
   410 # Perhaps San Luis operates on the legal fiction that it is at -04
       
   411 # with perpetual daylight saving time, but ordinary usage typically seems to
       
   412 # just say it's at -03; see, for example,
       
   413 # https://es.wikipedia.org/wiki/Hora_oficial_argentina
       
   414 # We've documented similar situations as being plain changes to
       
   415 # standard time, so let's do that here too.  This does not change UTC
       
   416 # offsets, only tm_isdst and the time zone abbreviations.  One minor
       
   417 # plus is that this silences a zic complaint that there's no POSIX TZ
       
   418 # setting for timestamps past 2038.
       
   419 
       
   420 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
   421 #
       
   422 # Buenos Aires (BA), Capital Federal (CF),
       
   423 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT	1894 Oct 31
       
   424 			-4:16:48 -	CMT	1920 May    # Córdoba Mean Time
       
   425 			-4:00	-	-04	1930 Dec
       
   426 			-4:00	Arg	-04/-03	1969 Oct  5
       
   427 			-3:00	Arg	-03/-02	1999 Oct  3
       
   428 			-4:00	Arg	-04/-03	2000 Mar  3
       
   429 			-3:00	Arg	-03/-02
       
   430 #
       
   431 # Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN),
       
   432 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
       
   433 #
       
   434 # Shanks & Pottenger also make the following claims, which we haven't verified:
       
   435 # - Formosa switched to -3:00 on 1991-01-07.
       
   436 # - Misiones switched to -3:00 on 1990-12-29.
       
   437 # - Chaco switched to -3:00 on 1991-01-04.
       
   438 # - Santiago del Estero switched to -4:00 on 1991-04-01,
       
   439 #   then to -3:00 on 1991-04-26.
       
   440 #
       
   441 Zone America/Argentina/Cordoba -4:16:48 - LMT	1894 Oct 31
       
   442 			-4:16:48 -	CMT	1920 May
       
   443 			-4:00	-	-04	1930 Dec
       
   444 			-4:00	Arg	-04/-03	1969 Oct  5
       
   445 			-3:00	Arg	-03/-02	1991 Mar  3
       
   446 			-4:00	-	-04	1991 Oct 20
       
   447 			-3:00	Arg	-03/-02	1999 Oct  3
       
   448 			-4:00	Arg	-04/-03	2000 Mar  3
       
   449 			-3:00	Arg	-03/-02
       
   450 #
       
   451 # Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN)
       
   452 Zone America/Argentina/Salta -4:21:40 - LMT	1894 Oct 31
       
   453 			-4:16:48 -	CMT	1920 May
       
   454 			-4:00	-	-04	1930 Dec
       
   455 			-4:00	Arg	-04/-03	1969 Oct  5
       
   456 			-3:00	Arg	-03/-02	1991 Mar  3
       
   457 			-4:00	-	-04	1991 Oct 20
       
   458 			-3:00	Arg	-03/-02	1999 Oct  3
       
   459 			-4:00	Arg	-04/-03	2000 Mar  3
       
   460 			-3:00	Arg	-03/-02	2008 Oct 18
       
   461 			-3:00	-	-03
       
   462 #
       
   463 # Tucumán (TM)
       
   464 Zone America/Argentina/Tucuman -4:20:52 - LMT	1894 Oct 31
       
   465 			-4:16:48 -	CMT	1920 May
       
   466 			-4:00	-	-04	1930 Dec
       
   467 			-4:00	Arg	-04/-03	1969 Oct  5
       
   468 			-3:00	Arg	-03/-02	1991 Mar  3
       
   469 			-4:00	-	-04	1991 Oct 20
       
   470 			-3:00	Arg	-03/-02	1999 Oct  3
       
   471 			-4:00	Arg	-04/-03	2000 Mar  3
       
   472 			-3:00	-	-03	2004 Jun  1
       
   473 			-4:00	-	-04	2004 Jun 13
       
   474 			-3:00	Arg	-03/-02
       
   475 #
       
   476 # La Rioja (LR)
       
   477 Zone America/Argentina/La_Rioja -4:27:24 - LMT	1894 Oct 31
       
   478 			-4:16:48 -	CMT	1920 May
       
   479 			-4:00	-	-04	1930 Dec
       
   480 			-4:00	Arg	-04/-03	1969 Oct  5
       
   481 			-3:00	Arg	-03/-02	1991 Mar  1
       
   482 			-4:00	-	-04	1991 May  7
       
   483 			-3:00	Arg	-03/-02	1999 Oct  3
       
   484 			-4:00	Arg	-04/-03	2000 Mar  3
       
   485 			-3:00	-	-03	2004 Jun  1
       
   486 			-4:00	-	-04	2004 Jun 20
       
   487 			-3:00	Arg	-03/-02	2008 Oct 18
       
   488 			-3:00	-	-03
       
   489 #
       
   490 # San Juan (SJ)
       
   491 Zone America/Argentina/San_Juan -4:34:04 - LMT	1894 Oct 31
       
   492 			-4:16:48 -	CMT	1920 May
       
   493 			-4:00	-	-04	1930 Dec
       
   494 			-4:00	Arg	-04/-03	1969 Oct  5
       
   495 			-3:00	Arg	-03/-02	1991 Mar  1
       
   496 			-4:00	-	-04	1991 May  7
       
   497 			-3:00	Arg	-03/-02	1999 Oct  3
       
   498 			-4:00	Arg	-04/-03	2000 Mar  3
       
   499 			-3:00	-	-03	2004 May 31
       
   500 			-4:00	-	-04	2004 Jul 25
       
   501 			-3:00	Arg	-03/-02	2008 Oct 18
       
   502 			-3:00	-	-03
       
   503 #
       
   504 # Jujuy (JY)
       
   505 Zone America/Argentina/Jujuy -4:21:12 -	LMT	1894 Oct 31
       
   506 			-4:16:48 -	CMT	1920 May
       
   507 			-4:00	-	-04	1930 Dec
       
   508 			-4:00	Arg	-04/-03	1969 Oct  5
       
   509 			-3:00	Arg	-03/-02	1990 Mar  4
       
   510 			-4:00	-	-04	1990 Oct 28
       
   511 			-4:00	1:00	-03	1991 Mar 17
       
   512 			-4:00	-	-04	1991 Oct  6
       
   513 			-3:00	1:00	-02	1992
       
   514 			-3:00	Arg	-03/-02	1999 Oct  3
       
   515 			-4:00	Arg	-04/-03	2000 Mar  3
       
   516 			-3:00	Arg	-03/-02	2008 Oct 18
       
   517 			-3:00	-	-03
       
   518 #
       
   519 # Catamarca (CT), Chubut (CH)
       
   520 Zone America/Argentina/Catamarca -4:23:08 - LMT	1894 Oct 31
       
   521 			-4:16:48 -	CMT	1920 May
       
   522 			-4:00	-	-04	1930 Dec
       
   523 			-4:00	Arg	-04/-03	1969 Oct  5
       
   524 			-3:00	Arg	-03/-02	1991 Mar  3
       
   525 			-4:00	-	-04	1991 Oct 20
       
   526 			-3:00	Arg	-03/-02	1999 Oct  3
       
   527 			-4:00	Arg	-04/-03	2000 Mar  3
       
   528 			-3:00	-	-03	2004 Jun  1
       
   529 			-4:00	-	-04	2004 Jun 20
       
   530 			-3:00	Arg	-03/-02	2008 Oct 18
       
   531 			-3:00	-	-03
       
   532 #
       
   533 # Mendoza (MZ)
       
   534 Zone America/Argentina/Mendoza -4:35:16 - LMT	1894 Oct 31
       
   535 			-4:16:48 -	CMT	1920 May
       
   536 			-4:00	-	-04	1930 Dec
       
   537 			-4:00	Arg	-04/-03	1969 Oct  5
       
   538 			-3:00	Arg	-03/-02	1990 Mar  4
       
   539 			-4:00	-	-04	1990 Oct 15
       
   540 			-4:00	1:00	-03	1991 Mar  1
       
   541 			-4:00	-	-04	1991 Oct 15
       
   542 			-4:00	1:00	-03	1992 Mar  1
       
   543 			-4:00	-	-04	1992 Oct 18
       
   544 			-3:00	Arg	-03/-02	1999 Oct  3
       
   545 			-4:00	Arg	-04/-03	2000 Mar  3
       
   546 			-3:00	-	-03	2004 May 23
       
   547 			-4:00	-	-04	2004 Sep 26
       
   548 			-3:00	Arg	-03/-02	2008 Oct 18
       
   549 			-3:00	-	-03
       
   550 #
       
   551 # San Luis (SL)
       
   552 
       
   553 Rule	SanLuis	2008	2009	-	Mar	Sun>=8	0:00	0	-
       
   554 Rule	SanLuis	2007	2008	-	Oct	Sun>=8	0:00	1:00	-
       
   555 
       
   556 Zone America/Argentina/San_Luis -4:25:24 - LMT	1894 Oct 31
       
   557 			-4:16:48 -	CMT	1920 May
       
   558 			-4:00	-	-04	1930 Dec
       
   559 			-4:00	Arg	-04/-03	1969 Oct  5
       
   560 			-3:00	Arg	-03/-02	1990
       
   561 			-3:00	1:00	-02	1990 Mar 14
       
   562 			-4:00	-	-04	1990 Oct 15
       
   563 			-4:00	1:00	-03	1991 Mar  1
       
   564 			-4:00	-	-04	1991 Jun  1
       
   565 			-3:00	-	-03	1999 Oct  3
       
   566 			-4:00	1:00	-03	2000 Mar  3
       
   567 			-3:00	-	-03	2004 May 31
       
   568 			-4:00	-	-04	2004 Jul 25
       
   569 			-3:00	Arg	-03/-02	2008 Jan 21
       
   570 			-4:00	SanLuis	-04/-03	2009 Oct 11
       
   571 			-3:00	-	-03
       
   572 #
       
   573 # Santa Cruz (SC)
       
   574 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT	1894 Oct 31
       
   575 			-4:16:48 -	CMT	1920 May
       
   576 			-4:00	-	-04	1930 Dec
       
   577 			-4:00	Arg	-04/-03	1969 Oct  5
       
   578 			-3:00	Arg	-03/-02	1999 Oct  3
       
   579 			-4:00	Arg	-04/-03	2000 Mar  3
       
   580 			-3:00	-	-03	2004 Jun  1
       
   581 			-4:00	-	-04	2004 Jun 20
       
   582 			-3:00	Arg	-03/-02	2008 Oct 18
       
   583 			-3:00	-	-03
       
   584 #
       
   585 # Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF)
       
   586 Zone America/Argentina/Ushuaia -4:33:12 - LMT	1894 Oct 31
       
   587 			-4:16:48 -	CMT	1920 May
       
   588 			-4:00	-	-04	1930 Dec
       
   589 			-4:00	Arg	-04/-03	1969 Oct  5
       
   590 			-3:00	Arg	-03/-02	1999 Oct  3
       
   591 			-4:00	Arg	-04/-03	2000 Mar  3
       
   592 			-3:00	-	-03	2004 May 30
       
   593 			-4:00	-	-04	2004 Jun 20
       
   594 			-3:00	Arg	-03/-02	2008 Oct 18
       
   595 			-3:00	-	-03
       
   596 
       
   597 # Aruba
       
   598 Link America/Curacao America/Aruba
       
   599 
       
   600 # Bolivia
       
   601 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
   602 Zone	America/La_Paz	-4:32:36 -	LMT	1890
       
   603 			-4:32:36 -	CMT	1931 Oct 15 # Calamarca MT
       
   604 			-4:32:36 1:00	BST	1932 Mar 21 # Bolivia ST
       
   605 			-4:00	-	-04
       
   606 
       
   607 # Brazil
       
   608 
       
   609 # From Paul Eggert (1993-11-18):
       
   610 # The mayor of Rio recently attempted to change the time zone rules
       
   611 # just in his city, in order to leave more summer time for the tourist trade.
       
   612 # The rule change lasted only part of the day;
       
   613 # the federal government refused to follow the city's rules, and business
       
   614 # was in a chaos, so the mayor backed down that afternoon.
       
   615 
       
   616 # From IATA SSIM (1996-02):
       
   617 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
       
   618 # Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ),
       
   619 # Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO),
       
   620 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
       
   621 # [The last three states are new to this issue of the IATA SSIM.]
       
   622 
       
   623 # From Gwillim Law (1996-10-07):
       
   624 # Geography, history (Tocantins was part of Goiás until 1989), and other
       
   625 # sources of time zone information lead me to believe that AL, SE, and TO were
       
   626 # always in BR1, and so the only change was whether or not they observed DST....
       
   627 # The earliest issue of the SSIM I have is 2/91.  Each issue from then until
       
   628 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
       
   629 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
       
   630 # (UTC-4)....  The other two time zones given for Brazil are BR3, which is
       
   631 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
       
   632 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
       
   633 # become part of the state of Pernambuco).  The boundary between BR1 and BR2
       
   634 # has never been clearly stated.  They've simply been called East and West.
       
   635 # However, some conclusions can be drawn from another IATA manual: the Airline
       
   636 # Coding Directory, which lists close to 400 airports in Brazil.  For each
       
   637 # airport it gives a time zone which is coded to the SSIM.  From that
       
   638 # information, I'm led to conclude that the states of Amapá (AP), Ceará (CE),
       
   639 # Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do
       
   640 # Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST.
       
   641 
       
   642 # From Marcos Tadeu (1998-09-27):
       
   643 # Brazilian official page <http://pcdsh01.on.br/verao1.html>
       
   644 
       
   645 # From Jesper Nørgaard (2000-11-03):
       
   646 # [For an official list of which regions in Brazil use which time zones, see:]
       
   647 # http://pcdsh01.on.br/Fusbr.htm
       
   648 # http://pcdsh01.on.br/Fusbrhv.htm
       
   649 
       
   650 # From Celso Doria via David Madeo (2002-10-09):
       
   651 # The reason for the delay this year has to do with elections in Brazil.
       
   652 #
       
   653 # Unlike in the United States, elections in Brazil are 100% computerized and
       
   654 # the results are known almost immediately.  Yesterday, it was the first
       
   655 # round of the elections when 115 million Brazilians voted for President,
       
   656 # Governor, Senators, Federal Deputies, and State Deputies.  Nobody is
       
   657 # counting (or re-counting) votes anymore and we know there will be a second
       
   658 # round for the Presidency and also for some Governors.  The 2nd round will
       
   659 # take place on October 27th.
       
   660 #
       
   661 # The reason why the DST will only begin November 3rd is that the thousands
       
   662 # of electoral machines used cannot have their time changed, and since the
       
   663 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
       
   664 # the Government decided to postpone DST, instead of changing the Constitution
       
   665 # (maybe, for the next elections, it will be possible to change the clock)...
       
   666 
       
   667 # From Rodrigo Severo (2004-10-04):
       
   668 # It's just the biannual change made necessary by the much hyped, supposedly
       
   669 # modern Brazilian eletronic voting machines which, apparently, can't deal
       
   670 # with a time change between the first and the second rounds of the elections.
       
   671 
       
   672 # From Steffen Thorsen (2007-09-20):
       
   673 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
       
   674 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
       
   675 
       
   676 # From Paul Schulze (2008-06-24):
       
   677 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
       
   678 # Oficial da União"...) in Brazil there are changes in the timezones,
       
   679 # effective today (00:00am at June 24, 2008) as follows:
       
   680 #
       
   681 # a) The timezone UTC+5 is extinguished, with all the Acre state and the
       
   682 # part of the Amazonas state that had this timezone now being put to the
       
   683 # timezone UTC+4
       
   684 # b) The whole Pará state now is put at timezone UTC+3, instead of just
       
   685 # part of it, as was before.
       
   686 #
       
   687 # This change follows a proposal of senator Tiao Viana of Acre state, that
       
   688 # proposed it due to concerns about open television channels displaying
       
   689 # programs inappropriate to youths in the states that had the timezone
       
   690 # UTC+5 too early in the night. In the occasion, some more corrections
       
   691 # were proposed, trying to unify the timezones of any given state. This
       
   692 # change modifies timezone rules defined in decree 2.784 of 18 June,
       
   693 # 1913.
       
   694 
       
   695 # From Rodrigo Severo (2008-06-24):
       
   696 # Just correcting the URL:
       
   697 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
       
   698 #
       
   699 # As a result of the above Decree I believe the America/Rio_Branco
       
   700 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
       
   701 # be created to represent the...west side of the Pará State. I
       
   702 # suggest this new timezone be called Santarem as the most
       
   703 # important/populated city in the affected area.
       
   704 #
       
   705 # This new timezone would be the same as the Rio_Branco timezone up to
       
   706 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
       
   707 
       
   708 # From Alex Krivenyshev (2008-06-24):
       
   709 # This is a quick reference page for New and Old Brazil Time Zones map.
       
   710 # http://www.worldtimezone.com/brazil-time-new-old.php
       
   711 #
       
   712 # - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
       
   713 # (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
       
   714 # part of Par state is moving to one timezone UTC-03 (from UTC-04).
       
   715 
       
   716 # From Paul Eggert (2002-10-10):
       
   717 # The official decrees referenced below are mostly taken from
       
   718 # Decretos sobre o Horário de Verão no Brasil.
       
   719 # http://pcdsh01.on.br/DecHV.html
       
   720 
       
   721 # From Steffen Thorsen (2008-08-29):
       
   722 # As announced by the government and many newspapers in Brazil late
       
   723 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
       
   724 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
       
   725 # past years experience with the elections, there was a good chance that
       
   726 # the start was postponed to November, but it did not happen this year.
       
   727 #
       
   728 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
       
   729 #
       
   730 # An official page about it:
       
   731 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
       
   732 # Note that this link does not always work directly, but must be accessed
       
   733 # by going to
       
   734 # http://www.mme.gov.br/first
       
   735 #
       
   736 # One example link that works directly:
       
   737 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
       
   738 # (Portuguese)
       
   739 #
       
   740 # We have a written a short article about it as well:
       
   741 # https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
       
   742 #
       
   743 # From Alexander Krivenyshev (2011-10-04):
       
   744 # State Bahia will return to Daylight savings time this year after 8 years off.
       
   745 # The announcement was made by Governor Jaques Wagner in an interview to a
       
   746 # television station in Salvador.
       
   747 
       
   748 # In Portuguese:
       
   749 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
       
   750 # https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
       
   751 
       
   752 # From Guilherme Bernardes Rodrigues (2011-10-07):
       
   753 # There is news in the media, however there is still no decree about it.
       
   754 # I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
       
   755 # official agency about time in Brazil, and she confirmed that the old rule is
       
   756 # still in force.
       
   757 
       
   758 # From Guilherme Bernardes Rodrigues (2011-10-14)
       
   759 # It's official, the President signed a decree that includes Bahia in summer
       
   760 # time.
       
   761 #	 [ and in a second message (same day): ]
       
   762 # I found the decree.
       
   763 #
       
   764 # DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011
       
   765 # Link :
       
   766 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
       
   767 
       
   768 # From Kelley Cook (2012-10-16):
       
   769 # The governor of state of Bahia in Brazil announced on Thursday that
       
   770 # due to public pressure, he is reversing the DST policy they implemented
       
   771 # last year and will not be going to Summer Time on October 21st....
       
   772 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
       
   773 
       
   774 # From Rodrigo Severo (2012-10-16):
       
   775 # Tocantins state will have DST.
       
   776 # https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
       
   777 
       
   778 # From Steffen Thorsen (2013-09-20):
       
   779 # Tocantins in Brazil is very likely not to observe DST from October....
       
   780 # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
       
   781 # We will keep this article updated when this is confirmed:
       
   782 # https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
       
   783 
       
   784 # From Steffen Thorsen (2013-10-17):
       
   785 # https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
       
   786 # Senator Jorge Viana announced that Acre will change time zone on November 10.
       
   787 # He did not specify the time of the change, nor if western parts of Amazonas
       
   788 # will change as well.
       
   789 #
       
   790 # From Paul Eggert (2013-10-17):
       
   791 # For now, assume western Amazonas will change as well.
       
   792 
       
   793 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
       
   794 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
       
   795 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
       
   796 Rule	Brazil	1931	only	-	Oct	 3	11:00	1:00	-
       
   797 Rule	Brazil	1932	1933	-	Apr	 1	 0:00	0	-
       
   798 Rule	Brazil	1932	only	-	Oct	 3	 0:00	1:00	-
       
   799 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
       
   800 # revoked DST.
       
   801 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
       
   802 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
       
   803 Rule	Brazil	1949	1952	-	Dec	 1	 0:00	1:00	-
       
   804 Rule	Brazil	1950	only	-	Apr	16	 1:00	0	-
       
   805 Rule	Brazil	1951	1952	-	Apr	 1	 0:00	0	-
       
   806 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
       
   807 Rule	Brazil	1953	only	-	Mar	 1	 0:00	0	-
       
   808 # Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
       
   809 # revoked DST.
       
   810 # Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
       
   811 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
       
   812 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
       
   813 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
       
   814 # extended the above decree to all of the national territory on 12-09.
       
   815 Rule	Brazil	1963	only	-	Dec	 9	 0:00	1:00	-
       
   816 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
       
   817 # extended summer time by one day to 1964-03-01 00:00 (start of school).
       
   818 Rule	Brazil	1964	only	-	Mar	 1	 0:00	0	-
       
   819 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
       
   820 Rule	Brazil	1965	only	-	Jan	31	 0:00	1:00	-
       
   821 Rule	Brazil	1965	only	-	Mar	31	 0:00	0	-
       
   822 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
       
   823 Rule	Brazil	1965	only	-	Dec	 1	 0:00	1:00	-
       
   824 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
       
   825 Rule	Brazil	1966	1968	-	Mar	 1	 0:00	0	-
       
   826 Rule	Brazil	1966	1967	-	Nov	 1	 0:00	1:00	-
       
   827 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
       
   828 # revoked DST.
       
   829 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
       
   830 Rule	Brazil	1985	only	-	Nov	 2	 0:00	1:00	-
       
   831 # Decree 92,310 (1986-01-21)
       
   832 # Decree 92,463 (1986-03-13)
       
   833 Rule	Brazil	1986	only	-	Mar	15	 0:00	0	-
       
   834 # Decree 93,316 (1986-10-01)
       
   835 Rule	Brazil	1986	only	-	Oct	25	 0:00	1:00	-
       
   836 Rule	Brazil	1987	only	-	Feb	14	 0:00	0	-
       
   837 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
       
   838 Rule	Brazil	1987	only	-	Oct	25	 0:00	1:00	-
       
   839 Rule	Brazil	1988	only	-	Feb	 7	 0:00	0	-
       
   840 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
       
   841 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
       
   842 Rule	Brazil	1988	only	-	Oct	16	 0:00	1:00	-
       
   843 Rule	Brazil	1989	only	-	Jan	29	 0:00	0	-
       
   844 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
       
   845 # with the same exceptions
       
   846 Rule	Brazil	1989	only	-	Oct	15	 0:00	1:00	-
       
   847 Rule	Brazil	1990	only	-	Feb	11	 0:00	0	-
       
   848 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
       
   849 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
       
   850 # Decree 99,629 (1990-10-19) adds BA, MT.
       
   851 Rule	Brazil	1990	only	-	Oct	21	 0:00	1:00	-
       
   852 Rule	Brazil	1991	only	-	Feb	17	 0:00	0	-
       
   853 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
       
   854 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
       
   855 Rule	Brazil	1991	only	-	Oct	20	 0:00	1:00	-
       
   856 Rule	Brazil	1992	only	-	Feb	 9	 0:00	0	-
       
   857 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
       
   858 # adopted by same states.
       
   859 Rule	Brazil	1992	only	-	Oct	25	 0:00	1:00	-
       
   860 Rule	Brazil	1993	only	-	Jan	31	 0:00	0	-
       
   861 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
       
   862 # adopted by same states, plus AM.
       
   863 # Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
       
   864 # web page corrected 2004-01-07) adopted by same states, minus AM.
       
   865 # Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
       
   866 # adopted by same states, plus MT and TO.
       
   867 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
       
   868 # adds AL, SE.
       
   869 Rule	Brazil	1993	1995	-	Oct	Sun>=11	 0:00	1:00	-
       
   870 Rule	Brazil	1994	1995	-	Feb	Sun>=15	 0:00	0	-
       
   871 Rule	Brazil	1996	only	-	Feb	11	 0:00	0	-
       
   872 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
       
   873 # adopted by same states, minus AL, SE.
       
   874 Rule	Brazil	1996	only	-	Oct	 6	 0:00	1:00	-
       
   875 Rule	Brazil	1997	only	-	Feb	16	 0:00	0	-
       
   876 # From Daniel C. Sobral (1998-02-12):
       
   877 # In 1997, the DS began on October 6. The stated reason was that
       
   878 # because international television networks ignored Brazil's policy on DS,
       
   879 # they bought the wrong times on satellite for coverage of Pope's visit.
       
   880 # This year, the ending date of DS was postponed to March 1
       
   881 # to help dealing with the shortages of electric power.
       
   882 #
       
   883 # Decree 2,317 (1997-09-04), adopted by same states.
       
   884 Rule	Brazil	1997	only	-	Oct	 6	 0:00	1:00	-
       
   885 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
       
   886 # (1998-02-10)
       
   887 Rule	Brazil	1998	only	-	Mar	 1	 0:00	0	-
       
   888 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
       
   889 # adopted by the same states as before.
       
   890 Rule	Brazil	1998	only	-	Oct	11	 0:00	1:00	-
       
   891 Rule	Brazil	1999	only	-	Feb	21	 0:00	0	-
       
   892 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
       
   893 # (1999-08-23) adopted by same states.
       
   894 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
       
   895 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
       
   896 Rule	Brazil	1999	only	-	Oct	 3	 0:00	1:00	-
       
   897 Rule	Brazil	2000	only	-	Feb	27	 0:00	0	-
       
   898 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
       
   899 # adopted by the same states as before.
       
   900 # Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
       
   901 # repeals DST in PE and RR, effective 2000-10-15 00:00.
       
   902 # Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
       
   903 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
       
   904 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
       
   905 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
       
   906 Rule	Brazil	2000	2001	-	Oct	Sun>=8	 0:00	1:00	-
       
   907 Rule	Brazil	2001	2006	-	Feb	Sun>=15	 0:00	0	-
       
   908 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
       
   909 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
       
   910 Rule	Brazil	2002	only	-	Nov	 3	 0:00	1:00	-
       
   911 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
       
   912 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
       
   913 Rule	Brazil	2003	only	-	Oct	19	 0:00	1:00	-
       
   914 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
       
   915 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
       
   916 Rule	Brazil	2004	only	-	Nov	 2	 0:00	1:00	-
       
   917 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
       
   918 # adopted by the same states as before.
       
   919 Rule	Brazil	2005	only	-	Oct	16	 0:00	1:00	-
       
   920 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
       
   921 # adopted by the same states as before.
       
   922 Rule	Brazil	2006	only	-	Nov	 5	 0:00	1:00	-
       
   923 Rule	Brazil	2007	only	-	Feb	25	 0:00	0	-
       
   924 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
       
   925 # adopted by the same states as before.
       
   926 Rule	Brazil	2007	only	-	Oct	Sun>=8	 0:00	1:00	-
       
   927 # From Frederico A. C. Neves (2008-09-10):
       
   928 # According to this decree
       
   929 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
       
   930 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
       
   931 # 3rd Feb Sunday. There is an exception on the return date when this is
       
   932 # the Carnival Sunday then the return date will be the next Sunday...
       
   933 Rule	Brazil	2008	2017	-	Oct	Sun>=15	0:00	1:00	-
       
   934 Rule	Brazil	2008	2011	-	Feb	Sun>=15	0:00	0	-
       
   935 # Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13)
       
   936 # added Bahia.
       
   937 Rule	Brazil	2012	only	-	Feb	Sun>=22	0:00	0	-
       
   938 # Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15)
       
   939 # removed Bahia and added Tocantins.
       
   940 # Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30)
       
   941 # removed Tocantins.
       
   942 Rule	Brazil	2013	2014	-	Feb	Sun>=15	0:00	0	-
       
   943 Rule	Brazil	2015	only	-	Feb	Sun>=22	0:00	0	-
       
   944 Rule	Brazil	2016	2022	-	Feb	Sun>=15	0:00	0	-
       
   945 # From Steffen Thorsen (2017-12-18):
       
   946 # According to many media sources, next year's DST start in Brazil will move to
       
   947 # the first Sunday of November, and it will stay like that for the years after.
       
   948 # ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html
       
   949 # From Steffen Thorsen (2017-12-20):
       
   950 # http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm
       
   951 #
       
   952 # From Fábio Gomes (2018-10-04):
       
   953 # The Brazilian president just announced a new change on this year DST.
       
   954 # It was scheduled to start on November 4th and it was changed to November 18th.
       
   955 # From Rodrigo Brüning Wessler (2018-10-15):
       
   956 # The Brazilian government just announced that the change in DST was
       
   957 # canceled....  Maybe the president Michel Temer also woke up one hour
       
   958 # earlier today. :)
       
   959 Rule	Brazil	2018	max	-	Nov	Sun>=1	0:00	1:00	-
       
   960 Rule	Brazil	2023	only	-	Feb	Sun>=22	0:00	0	-
       
   961 Rule	Brazil	2024	2025	-	Feb	Sun>=15	0:00	0	-
       
   962 Rule	Brazil	2026	only	-	Feb	Sun>=22	0:00	0	-
       
   963 Rule	Brazil	2027	2033	-	Feb	Sun>=15	0:00	0	-
       
   964 Rule	Brazil	2034	only	-	Feb	Sun>=22	0:00	0	-
       
   965 Rule	Brazil	2035	2036	-	Feb	Sun>=15	0:00	0	-
       
   966 Rule	Brazil	2037	only	-	Feb	Sun>=22	0:00	0	-
       
   967 # From Arthur David Olson (2008-09-29):
       
   968 # The next is wrong in some years but is better than nothing.
       
   969 Rule	Brazil	2038	max	-	Feb	Sun>=15	0:00	0	-
       
   970 
       
   971 # The latest ruleset listed above says that the following states observe DST:
       
   972 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
       
   973 
       
   974 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
   975 #
       
   976 # Fernando de Noronha (administratively part of PE)
       
   977 Zone America/Noronha	-2:09:40 -	LMT	1914
       
   978 			-2:00	Brazil	-02/-01	1990 Sep 17
       
   979 			-2:00	-	-02	1999 Sep 30
       
   980 			-2:00	Brazil	-02/-01	2000 Oct 15
       
   981 			-2:00	-	-02	2001 Sep 13
       
   982 			-2:00	Brazil	-02/-01	2002 Oct  1
       
   983 			-2:00	-	-02
       
   984 # Other Atlantic islands have no permanent settlement.
       
   985 # These include Trindade and Martim Vaz (administratively part of ES),
       
   986 # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
       
   987 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
       
   988 # it also included the Penedos.
       
   989 #
       
   990 # Amapá (AP), east Pará (PA)
       
   991 # East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu.
       
   992 # The division between east and west Pará is the river Xingu.
       
   993 # In the north a very small part from the river Javary (now Jari I guess,
       
   994 # the border with Amapá) to the Amazon, then to the Xingu.
       
   995 Zone America/Belem	-3:13:56 -	LMT	1914
       
   996 			-3:00	Brazil	-03/-02	1988 Sep 12
       
   997 			-3:00	-	-03
       
   998 #
       
   999 # west Pará (PA)
       
  1000 # West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém.
       
  1001 Zone America/Santarem	-3:38:48 -	LMT	1914
       
  1002 			-4:00	Brazil	-04/-03	1988 Sep 12
       
  1003 			-4:00	-	-04	2008 Jun 24  0:00
       
  1004 			-3:00	-	-03
       
  1005 #
       
  1006 # Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN),
       
  1007 # Paraíba (PB)
       
  1008 Zone America/Fortaleza	-2:34:00 -	LMT	1914
       
  1009 			-3:00	Brazil	-03/-02	1990 Sep 17
       
  1010 			-3:00	-	-03	1999 Sep 30
       
  1011 			-3:00	Brazil	-03/-02	2000 Oct 22
       
  1012 			-3:00	-	-03	2001 Sep 13
       
  1013 			-3:00	Brazil	-03/-02	2002 Oct  1
       
  1014 			-3:00	-	-03
       
  1015 #
       
  1016 # Pernambuco (PE) (except Atlantic islands)
       
  1017 Zone America/Recife	-2:19:36 -	LMT	1914
       
  1018 			-3:00	Brazil	-03/-02	1990 Sep 17
       
  1019 			-3:00	-	-03	1999 Sep 30
       
  1020 			-3:00	Brazil	-03/-02	2000 Oct 15
       
  1021 			-3:00	-	-03	2001 Sep 13
       
  1022 			-3:00	Brazil	-03/-02	2002 Oct  1
       
  1023 			-3:00	-	-03
       
  1024 #
       
  1025 # Tocantins (TO)
       
  1026 Zone America/Araguaina	-3:12:48 -	LMT	1914
       
  1027 			-3:00	Brazil	-03/-02	1990 Sep 17
       
  1028 			-3:00	-	-03	1995 Sep 14
       
  1029 			-3:00	Brazil	-03/-02	2003 Sep 24
       
  1030 			-3:00	-	-03	2012 Oct 21
       
  1031 			-3:00	Brazil	-03/-02	2013 Sep
       
  1032 			-3:00	-	-03
       
  1033 #
       
  1034 # Alagoas (AL), Sergipe (SE)
       
  1035 Zone America/Maceio	-2:22:52 -	LMT	1914
       
  1036 			-3:00	Brazil	-03/-02	1990 Sep 17
       
  1037 			-3:00	-	-03	1995 Oct 13
       
  1038 			-3:00	Brazil	-03/-02	1996 Sep  4
       
  1039 			-3:00	-	-03	1999 Sep 30
       
  1040 			-3:00	Brazil	-03/-02	2000 Oct 22
       
  1041 			-3:00	-	-03	2001 Sep 13
       
  1042 			-3:00	Brazil	-03/-02	2002 Oct  1
       
  1043 			-3:00	-	-03
       
  1044 #
       
  1045 # Bahia (BA)
       
  1046 # There are too many Salvadors elsewhere, so use America/Bahia instead
       
  1047 # of America/Salvador.
       
  1048 Zone America/Bahia	-2:34:04 -	LMT	1914
       
  1049 			-3:00	Brazil	-03/-02	2003 Sep 24
       
  1050 			-3:00	-	-03	2011 Oct 16
       
  1051 			-3:00	Brazil	-03/-02	2012 Oct 21
       
  1052 			-3:00	-	-03
       
  1053 #
       
  1054 # Goiás (GO), Distrito Federal (DF), Minas Gerais (MG),
       
  1055 # Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR),
       
  1056 # Santa Catarina (SC), Rio Grande do Sul (RS)
       
  1057 Zone America/Sao_Paulo	-3:06:28 -	LMT	1914
       
  1058 			-3:00	Brazil	-03/-02	1963 Oct 23  0:00
       
  1059 			-3:00	1:00	-02	1964
       
  1060 			-3:00	Brazil	-03/-02
       
  1061 #
       
  1062 # Mato Grosso do Sul (MS)
       
  1063 Zone America/Campo_Grande -3:38:28 -	LMT	1914
       
  1064 			-4:00	Brazil	-04/-03
       
  1065 #
       
  1066 # Mato Grosso (MT)
       
  1067 Zone America/Cuiaba	-3:44:20 -	LMT	1914
       
  1068 			-4:00	Brazil	-04/-03	2003 Sep 24
       
  1069 			-4:00	-	-04	2004 Oct  1
       
  1070 			-4:00	Brazil	-04/-03
       
  1071 #
       
  1072 # Rondônia (RO)
       
  1073 Zone America/Porto_Velho -4:15:36 -	LMT	1914
       
  1074 			-4:00	Brazil	-04/-03	1988 Sep 12
       
  1075 			-4:00	-	-04
       
  1076 #
       
  1077 # Roraima (RR)
       
  1078 Zone America/Boa_Vista	-4:02:40 -	LMT	1914
       
  1079 			-4:00	Brazil	-04/-03	1988 Sep 12
       
  1080 			-4:00	-	-04	1999 Sep 30
       
  1081 			-4:00	Brazil	-04/-03	2000 Oct 15
       
  1082 			-4:00	-	-04
       
  1083 #
       
  1084 # east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto
       
  1085 # The great circle line from Tabatinga to Porto Acre divides
       
  1086 # east from west Amazonas.
       
  1087 Zone America/Manaus	-4:00:04 -	LMT	1914
       
  1088 			-4:00	Brazil	-04/-03	1988 Sep 12
       
  1089 			-4:00	-	-04	1993 Sep 28
       
  1090 			-4:00	Brazil	-04/-03	1994 Sep 22
       
  1091 			-4:00	-	-04
       
  1092 #
       
  1093 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
       
  1094 #	Eirunepé, Envira, Ipixuna
       
  1095 Zone America/Eirunepe	-4:39:28 -	LMT	1914
       
  1096 			-5:00	Brazil	-05/-04	1988 Sep 12
       
  1097 			-5:00	-	-05	1993 Sep 28
       
  1098 			-5:00	Brazil	-05/-04	1994 Sep 22
       
  1099 			-5:00	-	-05	2008 Jun 24  0:00
       
  1100 			-4:00	-	-04	2013 Nov 10
       
  1101 			-5:00	-	-05
       
  1102 #
       
  1103 # Acre (AC)
       
  1104 Zone America/Rio_Branco	-4:31:12 -	LMT	1914
       
  1105 			-5:00	Brazil	-05/-04	1988 Sep 12
       
  1106 			-5:00	-	-05	2008 Jun 24  0:00
       
  1107 			-4:00	-	-04	2013 Nov 10
       
  1108 			-5:00	-	-05
       
  1109 
       
  1110 # Chile
       
  1111 
       
  1112 # From Paul Eggert (2015-04-03):
       
  1113 # Shanks & Pottenger says America/Santiago introduced standard time in
       
  1114 # 1890 and rounds its UT offset to 70W40; guess that in practice this
       
  1115 # was the same offset as in 1916-1919.  It also says Pacific/Easter
       
  1116 # standardized on 109W22 in 1890; assume this didn't change the clocks.
       
  1117 #
       
  1118 # Dates for America/Santiago from 1910 to 2004 are primarily from
       
  1119 # the following source, cited by Oscar van Vlijmen (2006-10-08):
       
  1120 # [1] Chile Law
       
  1121 # http://www.webexhibits.org/daylightsaving/chile.html
       
  1122 # This contains a copy of this official table:
       
  1123 # Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30)
       
  1124 # https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm
       
  1125 # [1] needs several corrections, though.
       
  1126 #
       
  1127 # The first set of corrections is from:
       
  1128 # [2] History of the Official Time of Chile
       
  1129 # http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06).  See:
       
  1130 # https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html
       
  1131 # This is an English translation of:
       
  1132 # Historia de la hora oficial de Chile (retrieved 2012-10-24).  See:
       
  1133 # https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm
       
  1134 # A fancier Spanish version (requiring mouse-clicking) is at:
       
  1135 # http://www.horaoficial.cl/historia_hora.html
       
  1136 # Conflicts between [1] and [2] were resolved as follows:
       
  1137 #
       
  1138 #  - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites
       
  1139 #    Boletín No. 1, Aviso No. 1 (1910).  Go with [2].
       
  1140 #
       
  1141 #  - [1] says SMT was -4:42:45, [2] says Chile's official time from
       
  1142 #    1916 to 1919 was -4:42:46.3, the meridian of Chile's National
       
  1143 #    Astronomical Observatory (OAN), then located in what is now
       
  1144 #    Quinta Normal in Santiago.  Go with [2], rounding it to -4:42:46.
       
  1145 #
       
  1146 #  - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites
       
  1147 #    Boletín No. 22, Aviso No. 129/1918 (1918-08-23).  Go with [2].
       
  1148 #
       
  1149 #  - [1] does not give times for transitions; assume they occur
       
  1150 #    at midnight mainland time, the current common practice.  However,
       
  1151 #    go with [2]'s specification of 23:00 for the 1947-05-21 transition.
       
  1152 #
       
  1153 # Another correction to [1] is from Jesper Nørgaard Welen, who
       
  1154 # wrote (2006-10-08), "I think that there are some obvious mistakes in
       
  1155 # the suggested link from Oscar van Vlijmen,... for instance entry 66
       
  1156 # says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at
       
  1157 # 1990-09-15 (they should have been 1990-09-15 and 1990-09-16
       
  1158 # respectively), but anyhow it clears up some doubts too."
       
  1159 #
       
  1160 # Data for Pacific/Easter from 1910 through 1967 come from Shanks &
       
  1161 # Pottenger.  After that, for lack of better info assume
       
  1162 # Pacific/Easter is always two hours behind America/Santiago;
       
  1163 # this is known to work for DST transitions starting in 2008 and
       
  1164 # may well be true for earlier transitions.
       
  1165 
       
  1166 # From Eduardo Krell (1995-10-19):
       
  1167 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
       
  1168 # of October....  The law is the same for March and October.
       
  1169 # (1998-09-29):
       
  1170 # Because of the drought this year, the government decided to go into
       
  1171 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
       
  1172 # (unless there's another dry season next year, I guess).
       
  1173 
       
  1174 # From Julio I. Pacheco Troncoso (1999-03-18):
       
  1175 # Because of the same drought, the government decided to end DST later,
       
  1176 # on April 3, (one-time change).
       
  1177 
       
  1178 # From Germán Poo-Caamaño (2008-03-03):
       
  1179 # Due to drought, Chile extends Daylight Time in three weeks.  This
       
  1180 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
       
  1181 # and Saturday 3/29 at 22:00 for Pacific/Easter)
       
  1182 # The Supreme Decree is located at
       
  1183 # http://www.shoa.cl/servicios/supremo316.pdf
       
  1184 #
       
  1185 # From José Miguel Garrido (2008-03-05):
       
  1186 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
       
  1187 
       
  1188 # From Angel Chiang (2010-03-04):
       
  1189 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake
       
  1190 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
       
  1191 #
       
  1192 # From Arthur David Olson (2010-03-06):
       
  1193 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
       
  1194 
       
  1195 # From Glenn Eychaner (2011-03-28):
       
  1196 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
       
  1197 # In English:
       
  1198 # Chile's clocks will go back an hour this year on the 7th of May instead
       
  1199 # of this Saturday. They will go forward again the 3rd Saturday in
       
  1200 # August, not in October as they have since 1968.
       
  1201 
       
  1202 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
       
  1203 # As stated in the website of the Chilean Energy Ministry
       
  1204 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
       
  1205 # The Chilean Government has decided to postpone the entrance into winter time
       
  1206 # (to leave DST) from March 11 2012 to April 28th 2012....
       
  1207 # Quote from the website communication:
       
  1208 #
       
  1209 # 6. For the year 2012, the dates of entry into winter time will be as follows:
       
  1210 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
       
  1211 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
       
  1212 # of the same day.
       
  1213 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
       
  1214 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
       
  1215 # 01:00 on September 2.
       
  1216 
       
  1217 # From Steffen Thorsen (2013-02-15):
       
  1218 # According to several news sources, Chile has extended DST this year,
       
  1219 # they will end DST later and start DST earlier than planned.  They
       
  1220 # hope to save energy.  The new end date is 2013-04-28 00:00 and new
       
  1221 # start date is 2013-09-08 00:00....
       
  1222 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
       
  1223 
       
  1224 # From José Miguel Garrido (2014-02-19):
       
  1225 # Today appeared in the Diario Oficial a decree amending the time change
       
  1226 # dates to 2014.
       
  1227 # DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
       
  1228 # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
       
  1229 # http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
       
  1230 
       
  1231 # From Eduardo Romero Urra (2015-03-03):
       
  1232 # Today has been published officially that Chile will use the DST time
       
  1233 # permanently until March 25 of 2017
       
  1234 # http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg
       
  1235 #
       
  1236 # From Paul Eggert (2015-03-03):
       
  1237 # For now, assume that the extension will persist indefinitely.
       
  1238 
       
  1239 # From Juan Correa (2016-03-18):
       
  1240 # The decree regarding DST has been published in today's Official Gazette:
       
  1241 # http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/
       
  1242 # http://www.leychile.cl/Navegar?idNorma=1088502
       
  1243 # It does consider the second Saturday of May and August as the dates
       
  1244 # for the transition; and it lists DST dates until 2019, but I think
       
  1245 # this scheme will stick.
       
  1246 #
       
  1247 # From Paul Eggert (2016-03-18):
       
  1248 # For now, assume the pattern holds for the indefinite future.
       
  1249 # The decree says transitions occur at 24:00; in practice this appears
       
  1250 # to mean 24:00 mainland time, not 24:00 local time, so that Easter
       
  1251 # Island is always two hours behind the mainland.
       
  1252 
       
  1253 # From Juan Correa (2016-12-04):
       
  1254 # Magallanes region ... will keep DST (UTC -3) all year round....
       
  1255 # http://www.soychile.cl/Santiago/Sociedad/2016/12/04/433428/Bachelet-firmo-el-decreto-para-establecer-un-horario-unico-para-la-Region-de-Magallanes.aspx
       
  1256 #
       
  1257 # From Deborah Goldsmith (2017-01-19):
       
  1258 # http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf
       
  1259 # From Paul Eggert (2017-01-19):
       
  1260 # The above says the Magallanes change expires 2019-05-11 at 24:00,
       
  1261 # so in theory, they will revert to -04/-03 after that, which means
       
  1262 # they will switch from -03 to -04 one hour after Santiago does that day.
       
  1263 # For now, assume that they will not revert.
       
  1264 
       
  1265 # From Juan Correa (2018-08-13):
       
  1266 # As of moments ago, the Ministry of Energy in Chile has announced the new
       
  1267 # schema for DST. ...  Announcement in video (in Spanish):
       
  1268 # https://twitter.com/MinEnergia/status/1029000399129374720
       
  1269 # From Yonathan Dossow (2018-08-13):
       
  1270 # The video says "first Saturday of September", we all know it means Sunday at
       
  1271 # midnight.
       
  1272 # From Tim Parenti (2018-08-13):
       
  1273 # Translating the captions on the video at 0:44-0:55, "We want to announce as
       
  1274 # Government that from 2019, Winter Time will be increased to 5 months, between
       
  1275 # the first Saturday of April and the first Saturday of September."
       
  1276 # At 2:08-2:20, "The Magallanes region will maintain its current time, as
       
  1277 # decided by the citizens during 2017, but our Government will promote a
       
  1278 # regional dialogue table to gather their opinion on this matter."
       
  1279 # https://twitter.com/MinEnergia/status/1029009354001973248
       
  1280 # "We will keep the new time policy unchanged for at least the next 4 years."
       
  1281 # So we extend the new rules on Saturdays at 24:00 mainland time indefinitely.
       
  1282 
       
  1283 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
       
  1284 Rule	Chile	1927	1931	-	Sep	 1	0:00	1:00	-
       
  1285 Rule	Chile	1928	1932	-	Apr	 1	0:00	0	-
       
  1286 Rule	Chile	1968	only	-	Nov	 3	4:00u	1:00	-
       
  1287 Rule	Chile	1969	only	-	Mar	30	3:00u	0	-
       
  1288 Rule	Chile	1969	only	-	Nov	23	4:00u	1:00	-
       
  1289 Rule	Chile	1970	only	-	Mar	29	3:00u	0	-
       
  1290 Rule	Chile	1971	only	-	Mar	14	3:00u	0	-
       
  1291 Rule	Chile	1970	1972	-	Oct	Sun>=9	4:00u	1:00	-
       
  1292 Rule	Chile	1972	1986	-	Mar	Sun>=9	3:00u	0	-
       
  1293 Rule	Chile	1973	only	-	Sep	30	4:00u	1:00	-
       
  1294 Rule	Chile	1974	1987	-	Oct	Sun>=9	4:00u	1:00	-
       
  1295 Rule	Chile	1987	only	-	Apr	12	3:00u	0	-
       
  1296 Rule	Chile	1988	1990	-	Mar	Sun>=9	3:00u	0	-
       
  1297 Rule	Chile	1988	1989	-	Oct	Sun>=9	4:00u	1:00	-
       
  1298 Rule	Chile	1990	only	-	Sep	16	4:00u	1:00	-
       
  1299 Rule	Chile	1991	1996	-	Mar	Sun>=9	3:00u	0	-
       
  1300 Rule	Chile	1991	1997	-	Oct	Sun>=9	4:00u	1:00	-
       
  1301 Rule	Chile	1997	only	-	Mar	30	3:00u	0	-
       
  1302 Rule	Chile	1998	only	-	Mar	Sun>=9	3:00u	0	-
       
  1303 Rule	Chile	1998	only	-	Sep	27	4:00u	1:00	-
       
  1304 Rule	Chile	1999	only	-	Apr	 4	3:00u	0	-
       
  1305 Rule	Chile	1999	2010	-	Oct	Sun>=9	4:00u	1:00	-
       
  1306 Rule	Chile	2000	2007	-	Mar	Sun>=9	3:00u	0	-
       
  1307 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
       
  1308 # which is used below in specifying the transition.
       
  1309 Rule	Chile	2008	only	-	Mar	30	3:00u	0	-
       
  1310 Rule	Chile	2009	only	-	Mar	Sun>=9	3:00u	0	-
       
  1311 Rule	Chile	2010	only	-	Apr	Sun>=1	3:00u	0	-
       
  1312 Rule	Chile	2011	only	-	May	Sun>=2	3:00u	0	-
       
  1313 Rule	Chile	2011	only	-	Aug	Sun>=16	4:00u	1:00	-
       
  1314 Rule	Chile	2012	2014	-	Apr	Sun>=23	3:00u	0	-
       
  1315 Rule	Chile	2012	2014	-	Sep	Sun>=2	4:00u	1:00	-
       
  1316 Rule	Chile	2016	2018	-	May	Sun>=9	3:00u	0	-
       
  1317 Rule	Chile	2016	2018	-	Aug	Sun>=9	4:00u	1:00	-
       
  1318 Rule	Chile	2019	max	-	Apr	Sun>=2	3:00u	0	-
       
  1319 Rule	Chile	2019	max	-	Sep	Sun>=2	4:00u	1:00	-
       
  1320 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
       
  1321 # (1996-09) says 1998-03-08.  Ignore these.
       
  1322 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1323 Zone America/Santiago	-4:42:46 -	LMT	1890
       
  1324 			-4:42:46 -	SMT	1910 Jan 10 # Santiago Mean Time
       
  1325 			-5:00	-	-05	1916 Jul  1
       
  1326 			-4:42:46 -	SMT	1918 Sep 10
       
  1327 			-4:00	-	-04	1919 Jul  1
       
  1328 			-4:42:46 -	SMT	1927 Sep  1
       
  1329 			-5:00	Chile	-05/-04	1932 Sep  1
       
  1330 			-4:00	-	-04	1942 Jun  1
       
  1331 			-5:00	-	-05	1942 Aug  1
       
  1332 			-4:00	-	-04	1946 Jul 15
       
  1333 			-4:00	1:00	-03	1946 Sep  1 # central Chile
       
  1334 			-4:00	-	-04	1947 Apr  1
       
  1335 			-5:00	-	-05	1947 May 21 23:00
       
  1336 			-4:00	Chile	-04/-03
       
  1337 Zone America/Punta_Arenas -4:43:40 -	LMT	1890
       
  1338 			-4:42:46 -	SMT	1910 Jan 10
       
  1339 			-5:00	-	-05	1916 Jul  1
       
  1340 			-4:42:46 -	SMT	1918 Sep 10
       
  1341 			-4:00	-	-04	1919 Jul  1
       
  1342 			-4:42:46 -	SMT	1927 Sep  1
       
  1343 			-5:00	Chile	-05/-04	1932 Sep  1
       
  1344 			-4:00	-	-04	1942 Jun  1
       
  1345 			-5:00	-	-05	1942 Aug  1
       
  1346 			-4:00	-	-04	1947 Apr  1
       
  1347 			-5:00	-	-05	1947 May 21 23:00
       
  1348 			-4:00	Chile	-04/-03	2016 Dec  4
       
  1349 			-3:00	-	-03
       
  1350 Zone Pacific/Easter	-7:17:28 -	LMT	1890
       
  1351 			-7:17:28 -	EMT	1932 Sep    # Easter Mean Time
       
  1352 			-7:00	Chile	-07/-06	1982 Mar 14 3:00u # Easter Time
       
  1353 			-6:00	Chile	-06/-05
       
  1354 #
       
  1355 # Salas y Gómez Island is uninhabited.
       
  1356 # Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
       
  1357 # and Antarctic bases, are like America/Santiago.
       
  1358 
       
  1359 # Antarctic base using South American rules
       
  1360 # (See the file 'antarctica' for more.)
       
  1361 #
       
  1362 # Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
       
  1363 #
       
  1364 # From Ethan Dicks (1996-10-06):
       
  1365 # It keeps the same time as Punta Arenas, Chile, because, just like us
       
  1366 # and the South Pole, that's the other end of their supply line....
       
  1367 # I verified with someone who was there that since 1980,
       
  1368 # Palmer has followed Chile.  Prior to that, before the Falklands War,
       
  1369 # Palmer used to be supplied from Argentina.
       
  1370 #
       
  1371 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1372 Zone Antarctica/Palmer	0	-	-00	1965
       
  1373 			-4:00	Arg	-04/-03	1969 Oct  5
       
  1374 			-3:00	Arg	-03/-02	1982 May
       
  1375 			-4:00	Chile	-04/-03	2016 Dec  4
       
  1376 			-3:00	-	-03
       
  1377 
       
  1378 # Colombia
       
  1379 
       
  1380 # Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest.  He writes,
       
  1381 # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
       
  1382 
       
  1383 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
       
  1384 Rule	CO	1992	only	-	May	 3	0:00	1:00	-
       
  1385 Rule	CO	1993	only	-	Apr	 4	0:00	0	-
       
  1386 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1387 Zone	America/Bogota	-4:56:16 -	LMT	1884 Mar 13
       
  1388 			-4:56:16 -	BMT	1914 Nov 23 # Bogotá Mean Time
       
  1389 			-5:00	CO	-05/-04
       
  1390 # Malpelo, Providencia, San Andres
       
  1391 # no information; probably like America/Bogota
       
  1392 
       
  1393 # Curaçao
       
  1394 
       
  1395 # Milne gives 4:35:46.9 for Curaçao mean time; round to nearest.
       
  1396 #
       
  1397 # From Paul Eggert (2006-03-22):
       
  1398 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
       
  1399 # -4:00 since standard time was introduced on 1912-03-02; and that
       
  1400 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
       
  1401 # 1912-02-02 to 1965-01-01.  The former is dubious, since S&P also say
       
  1402 # Saba Island has been like Curaçao.
       
  1403 # This all predates our 1970 cutoff, though.
       
  1404 #
       
  1405 # By July 2007 Curaçao and St Maarten are planned to become
       
  1406 # associated states within the Netherlands, much like Aruba;
       
  1407 # Bonaire, Saba and St Eustatius would become directly part of the
       
  1408 # Netherlands as Kingdom Islands.  This won't affect their time zones
       
  1409 # though, as far as we know.
       
  1410 #
       
  1411 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1412 Zone	America/Curacao	-4:35:47 -	LMT	1912 Feb 12 # Willemstad
       
  1413 			-4:30	-	-0430	1965
       
  1414 			-4:00	-	AST
       
  1415 
       
  1416 # From Arthur David Olson (2011-06-15):
       
  1417 # use links for places with new iso3166 codes.
       
  1418 # The name "Lower Prince's Quarter" is both longer than fourteen characters
       
  1419 # and contains an apostrophe; use "Lower_Princes" below.
       
  1420 
       
  1421 Link	America/Curacao	America/Lower_Princes	# Sint Maarten
       
  1422 Link	America/Curacao	America/Kralendijk	# Caribbean Netherlands
       
  1423 
       
  1424 # Ecuador
       
  1425 #
       
  1426 # Milne says the Central and South American Telegraph Company used -5:24:15.
       
  1427 #
       
  1428 # From Alois Treindl (2016-12-15):
       
  1429 # https://www.elcomercio.com/actualidad/hora-sixto-1993.html
       
  1430 # ... Whether the law applied also to Galápagos, I do not know.
       
  1431 # From Paul Eggert (2016-12-15):
       
  1432 # https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html
       
  1433 # This says President Sixto Durán Ballén signed decree No. 285, which
       
  1434 # established DST from 1992-11-28 to 1993-02-05; it does not give transition
       
  1435 # times.  The people called it "hora de Sixto" ("Sixto hour").  The change did
       
  1436 # not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics
       
  1437 # that included "Amanecía en mitad de la noche, los guaguas iban a clase sin
       
  1438 # sol" ("It was dawning in the middle of the night, the buses went to class
       
  1439 # without sun").  Although Ballén's campaign slogan was "Ni un paso atrás"
       
  1440 # (Not one step back), the clocks went back in 1993 and the experiment was not
       
  1441 # repeated.  For now, assume transitions were at 00:00 local time country-wide.
       
  1442 #
       
  1443 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
       
  1444 Rule	Ecuador	1992	only	-	Nov	28	0:00	1:00	-
       
  1445 Rule	Ecuador	1993	only	-	Feb	 5	0:00	0	-
       
  1446 #
       
  1447 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1448 Zone America/Guayaquil	-5:19:20 -	LMT	1890
       
  1449 			-5:14:00 -	QMT	1931 # Quito Mean Time
       
  1450 			-5:00	Ecuador	-05/-04
       
  1451 Zone Pacific/Galapagos	-5:58:24 -	LMT	1931 # Puerto Baquerizo Moreno
       
  1452 			-5:00	-	-05	1986
       
  1453 			-6:00	Ecuador	-06/-05
       
  1454 
       
  1455 # Falklands
       
  1456 
       
  1457 # From Paul Eggert (2006-03-22):
       
  1458 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
       
  1459 # the IATA gives 1996-09-08.  Go with Shanks & Pottenger.
       
  1460 
       
  1461 # From Falkland Islands Government Office, London (2001-01-22)
       
  1462 # via Jesper Nørgaard:
       
  1463 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
       
  1464 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
       
  1465 # September.  It is anticipated that the clocks will revert back at 2
       
  1466 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
       
  1467 # Sunday 1 September.
       
  1468 
       
  1469 # From Rives McDow (2001-02-13):
       
  1470 #
       
  1471 # I have communicated several times with people there, and the last
       
  1472 # time I had communications that was helpful was in 1998.  Here is
       
  1473 # what was said then:
       
  1474 #
       
  1475 # "The general rule was that Stanley used daylight saving and the Camp
       
  1476 # did not. However for various reasons many people in the Camp have
       
  1477 # started to use daylight saving (known locally as 'Stanley Time')
       
  1478 # There is no rule as to who uses daylight saving - it is a matter of
       
  1479 # personal choice and so it is impossible to draw a map showing who
       
  1480 # uses it and who does not. Any list would be out of date as soon as
       
  1481 # it was produced. This year daylight saving ended on April 18/19th
       
  1482 # and started again on September 12/13th.  I do not know what the rule
       
  1483 # is, but can find out if you like.  We do not change at the same time
       
  1484 # as UK or Chile."
       
  1485 #
       
  1486 # I did have in my notes that the rule was "Second Saturday in Sep at
       
  1487 # 0:00 until third Saturday in Apr at 0:00".  I think that this does
       
  1488 # not agree in some cases with Shanks; is this true?
       
  1489 #
       
  1490 # Also, there is no mention in the list that some areas in the
       
  1491 # Falklands do not use DST.  I have found in my communications there
       
  1492 # that these areas are on the western half of East Falkland and all of
       
  1493 # West Falkland.  Stanley is the only place that consistently observes
       
  1494 # DST.  Again, as in other places in the world, the farmers don't like
       
  1495 # it.  West Falkland is almost entirely sheep farmers.
       
  1496 #
       
  1497 # I know one lady there that keeps a list of which farm keeps DST and
       
  1498 # which doesn't each year.  She runs a shop in Stanley, and says that
       
  1499 # the list changes each year.  She uses it to communicate to her
       
  1500 # customers, catching them when they are home for lunch or dinner.
       
  1501 
       
  1502 # From Paul Eggert (2001-03-05):
       
  1503 # For now, we'll just record the time in Stanley, since we have no
       
  1504 # better info.
       
  1505 
       
  1506 # From Steffen Thorsen (2011-04-01):
       
  1507 # The Falkland Islands will not turn back clocks this winter, but stay on
       
  1508 # daylight saving time.
       
  1509 #
       
  1510 # One source:
       
  1511 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3
       
  1512 #
       
  1513 # We have gotten this confirmed by a clerk of the legislative assembly:
       
  1514 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
       
  1515 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
       
  1516 # hours) on the first Sunday of September at 0200hrs.
       
  1517 #
       
  1518 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
       
  1519 # will not revert to local mean time, but clocks will remain on Summer
       
  1520 # time (UTC/GMT - 3 hours) throughout the whole of 2011.  Any long term
       
  1521 # change to local time following the trial period will be notified.
       
  1522 #
       
  1523 # From Andrew Newman (2012-02-24)
       
  1524 # A letter from Justin McPhee, Chief Executive,
       
  1525 # Cable & Wireless Falkland Islands (dated 2012-02-22)
       
  1526 # states...
       
  1527 #   The current Atlantic/Stanley entry under South America expects the
       
  1528 #   clocks to go back to standard Falklands Time (FKT) on the 15th April.
       
  1529 #   The database entry states that in 2011 Stanley was staying on fixed
       
  1530 #   summer time on a trial basis only.  FIG need to contact IANA and/or
       
  1531 #   the maintainers of the database to inform them we're adopting
       
  1532 #   the same policy this year and suggest recommendations for future years.
       
  1533 #
       
  1534 # For now we will assume permanent -03 for the Falklands
       
  1535 # until advised differently (to apply for 2012 and beyond, after the 2011
       
  1536 # experiment was apparently successful.)
       
  1537 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
       
  1538 Rule	Falk	1937	1938	-	Sep	lastSun	0:00	1:00	-
       
  1539 Rule	Falk	1938	1942	-	Mar	Sun>=19	0:00	0	-
       
  1540 Rule	Falk	1939	only	-	Oct	1	0:00	1:00	-
       
  1541 Rule	Falk	1940	1942	-	Sep	lastSun	0:00	1:00	-
       
  1542 Rule	Falk	1943	only	-	Jan	1	0:00	0	-
       
  1543 Rule	Falk	1983	only	-	Sep	lastSun	0:00	1:00	-
       
  1544 Rule	Falk	1984	1985	-	Apr	lastSun	0:00	0	-
       
  1545 Rule	Falk	1984	only	-	Sep	16	0:00	1:00	-
       
  1546 Rule	Falk	1985	2000	-	Sep	Sun>=9	0:00	1:00	-
       
  1547 Rule	Falk	1986	2000	-	Apr	Sun>=16	0:00	0	-
       
  1548 Rule	Falk	2001	2010	-	Apr	Sun>=15	2:00	0	-
       
  1549 Rule	Falk	2001	2010	-	Sep	Sun>=1	2:00	1:00	-
       
  1550 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1551 Zone Atlantic/Stanley	-3:51:24 -	LMT	1890
       
  1552 			-3:51:24 -	SMT	1912 Mar 12 # Stanley Mean Time
       
  1553 			-4:00	Falk	-04/-03	1983 May
       
  1554 			-3:00	Falk	-03/-02	1985 Sep 15
       
  1555 			-4:00	Falk	-04/-03	2010 Sep  5  2:00
       
  1556 			-3:00	-	-03
       
  1557 
       
  1558 # French Guiana
       
  1559 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1560 Zone America/Cayenne	-3:29:20 -	LMT	1911 Jul
       
  1561 			-4:00	-	-04	1967 Oct
       
  1562 			-3:00	-	-03
       
  1563 
       
  1564 # Guyana
       
  1565 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1566 Zone	America/Guyana	-3:52:40 -	LMT	1915 Mar    # Georgetown
       
  1567 			-3:45	-	-0345	1975 Jul 31
       
  1568 			-3:00	-	-03	1991
       
  1569 # IATA SSIM (1996-06) says -4:00.  Assume a 1991 switch.
       
  1570 			-4:00	-	-04
       
  1571 
       
  1572 # Paraguay
       
  1573 #
       
  1574 # From Paul Eggert (2006-03-22):
       
  1575 # Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
       
  1576 # and autumn transitions are 00:00 -> 23:00.  Go with pre-1999
       
  1577 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
       
  1578 #
       
  1579 # From Waldemar Villamayor-Venialbo (2013-09-20):
       
  1580 # No time of the day is established for the adjustment, so people normally
       
  1581 # adjust their clocks at 0 hour of the given dates.
       
  1582 #
       
  1583 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
       
  1584 Rule	Para	1975	1988	-	Oct	 1	0:00	1:00	-
       
  1585 Rule	Para	1975	1978	-	Mar	 1	0:00	0	-
       
  1586 Rule	Para	1979	1991	-	Apr	 1	0:00	0	-
       
  1587 Rule	Para	1989	only	-	Oct	22	0:00	1:00	-
       
  1588 Rule	Para	1990	only	-	Oct	 1	0:00	1:00	-
       
  1589 Rule	Para	1991	only	-	Oct	 6	0:00	1:00	-
       
  1590 Rule	Para	1992	only	-	Mar	 1	0:00	0	-
       
  1591 Rule	Para	1992	only	-	Oct	 5	0:00	1:00	-
       
  1592 Rule	Para	1993	only	-	Mar	31	0:00	0	-
       
  1593 Rule	Para	1993	1995	-	Oct	 1	0:00	1:00	-
       
  1594 Rule	Para	1994	1995	-	Feb	lastSun	0:00	0	-
       
  1595 Rule	Para	1996	only	-	Mar	 1	0:00	0	-
       
  1596 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
       
  1597 # From Steffen Thorsen (2000-10-02):
       
  1598 # I have three independent reports that Paraguay changed to DST this Sunday
       
  1599 # (10-01).
       
  1600 #
       
  1601 # Translated by Gwillim Law (2001-02-27) from
       
  1602 # Noticias, a daily paper in Asunción, Paraguay (2000-10-01):
       
  1603 # http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
       
  1604 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
       
  1605 # fulfillment of Decree No. 7,273 of the Executive Power....  The time change
       
  1606 # system has been operating for several years.  Formerly there was a separate
       
  1607 # decree each year; the new law has the same effect, but permanently.  Every
       
  1608 # year, the time will change on the first Sunday of October; likewise, the
       
  1609 # clock will be set back on the first Sunday of March.
       
  1610 #
       
  1611 Rule	Para	1996	2001	-	Oct	Sun>=1	0:00	1:00	-
       
  1612 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
       
  1613 Rule	Para	1997	only	-	Feb	lastSun	0:00	0	-
       
  1614 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
       
  1615 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
       
  1616 Rule	Para	1998	2001	-	Mar	Sun>=1	0:00	0	-
       
  1617 # From Rives McDow (2002-02-28):
       
  1618 # A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the
       
  1619 # dst method to be from the first Sunday in September to the first Sunday in
       
  1620 # April.
       
  1621 Rule	Para	2002	2004	-	Apr	Sun>=1	0:00	0	-
       
  1622 Rule	Para	2002	2003	-	Sep	Sun>=1	0:00	1:00	-
       
  1623 #
       
  1624 # From Jesper Nørgaard Welen (2005-01-02):
       
  1625 # There are several sources that claim that Paraguay made
       
  1626 # a timezone rule change in autumn 2004.
       
  1627 # From Steffen Thorsen (2005-01-05):
       
  1628 # Decree 1,867 (2004-03-05)
       
  1629 # From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
       
  1630 # http://www.presidencia.gov.py/decretos/D1867.pdf
       
  1631 Rule	Para	2004	2009	-	Oct	Sun>=15	0:00	1:00	-
       
  1632 Rule	Para	2005	2009	-	Mar	Sun>=8	0:00	0	-
       
  1633 # From Carlos Raúl Perasso (2010-02-18):
       
  1634 # By decree number 3958 issued yesterday
       
  1635 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
       
  1636 # Paraguay changes its DST schedule, postponing the March rule to April and
       
  1637 # modifying the October date. The decree reads:
       
  1638 # ...
       
  1639 # Art. 1. It is hereby established that from the second Sunday of the month of
       
  1640 # April of this year (2010), the official time is to be set back 60 minutes,
       
  1641 # and that on the first Sunday of the month of October, it is to be set
       
  1642 # forward 60 minutes, in all the territory of the Paraguayan Republic.
       
  1643 # ...
       
  1644 Rule	Para	2010	max	-	Oct	Sun>=1	0:00	1:00	-
       
  1645 Rule	Para	2010	2012	-	Apr	Sun>=8	0:00	0	-
       
  1646 #
       
  1647 # From Steffen Thorsen (2013-03-07):
       
  1648 # Paraguay will end DST on 2013-03-24 00:00....
       
  1649 # http://www.ande.gov.py/interna.php?id=1075
       
  1650 #
       
  1651 # From Carlos Raúl Perasso (2013-03-15):
       
  1652 # The change in Paraguay is now final.  Decree number 10780
       
  1653 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
       
  1654 # From Carlos Raúl Perasso (2014-02-28):
       
  1655 # Decree 1264 can be found at:
       
  1656 # http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
       
  1657 Rule	Para	2013	max	-	Mar	Sun>=22	0:00	0	-
       
  1658 
       
  1659 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1660 Zone America/Asuncion	-3:50:40 -	LMT	1890
       
  1661 			-3:50:40 -	AMT	1931 Oct 10 # Asunción Mean Time
       
  1662 			-4:00	-	-04	1972 Oct
       
  1663 			-3:00	-	-03	1974 Apr
       
  1664 			-4:00	Para	-04/-03
       
  1665 
       
  1666 # Peru
       
  1667 #
       
  1668 # From Evelyn C. Leeper via Mark Brader (2003-10-26)
       
  1669 # <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
       
  1670 # When we were in Peru in 1985-1986, they apparently switched over
       
  1671 # sometime between December 29 and January 3 while we were on the Amazon.
       
  1672 #
       
  1673 # From Paul Eggert (2006-03-22):
       
  1674 # Shanks & Pottenger don't have this transition.  Assume 1986 was like 1987.
       
  1675 
       
  1676 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
       
  1677 Rule	Peru	1938	only	-	Jan	 1	0:00	1:00	-
       
  1678 Rule	Peru	1938	only	-	Apr	 1	0:00	0	-
       
  1679 Rule	Peru	1938	1939	-	Sep	lastSun	0:00	1:00	-
       
  1680 Rule	Peru	1939	1940	-	Mar	Sun>=24	0:00	0	-
       
  1681 Rule	Peru	1986	1987	-	Jan	 1	0:00	1:00	-
       
  1682 Rule	Peru	1986	1987	-	Apr	 1	0:00	0	-
       
  1683 Rule	Peru	1990	only	-	Jan	 1	0:00	1:00	-
       
  1684 Rule	Peru	1990	only	-	Apr	 1	0:00	0	-
       
  1685 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
       
  1686 Rule	Peru	1994	only	-	Jan	 1	0:00	1:00	-
       
  1687 Rule	Peru	1994	only	-	Apr	 1	0:00	0	-
       
  1688 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1689 Zone	America/Lima	-5:08:12 -	LMT	1890
       
  1690 			-5:08:36 -	LMT	1908 Jul 28 # Lima Mean Time?
       
  1691 			-5:00	Peru	-05/-04
       
  1692 
       
  1693 # South Georgia
       
  1694 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1695 Zone Atlantic/South_Georgia -2:26:08 -	LMT	1890 # Grytviken
       
  1696 			-2:00	-	-02
       
  1697 
       
  1698 # South Sandwich Is
       
  1699 # uninhabited; scientific personnel have wintered
       
  1700 
       
  1701 # Suriname
       
  1702 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1703 Zone America/Paramaribo	-3:40:40 -	LMT	1911
       
  1704 			-3:40:52 -	PMT	1935     # Paramaribo Mean Time
       
  1705 			-3:40:36 -	PMT	1945 Oct    # The capital moved?
       
  1706 			-3:30	-	-0330	1984 Oct
       
  1707 			-3:00	-	-03
       
  1708 
       
  1709 # Trinidad and Tobago
       
  1710 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1711 Zone America/Port_of_Spain -4:06:04 -	LMT	1912 Mar 2
       
  1712 			-4:00	-	AST
       
  1713 
       
  1714 # These all agree with Trinidad and Tobago since 1970.
       
  1715 Link America/Port_of_Spain America/Anguilla
       
  1716 Link America/Port_of_Spain America/Antigua
       
  1717 Link America/Port_of_Spain America/Dominica
       
  1718 Link America/Port_of_Spain America/Grenada
       
  1719 Link America/Port_of_Spain America/Guadeloupe
       
  1720 Link America/Port_of_Spain America/Marigot	# St Martin (French part)
       
  1721 Link America/Port_of_Spain America/Montserrat
       
  1722 Link America/Port_of_Spain America/St_Barthelemy # St Barthélemy
       
  1723 Link America/Port_of_Spain America/St_Kitts	# St Kitts & Nevis
       
  1724 Link America/Port_of_Spain America/St_Lucia
       
  1725 Link America/Port_of_Spain America/St_Thomas	# Virgin Islands (US)
       
  1726 Link America/Port_of_Spain America/St_Vincent
       
  1727 Link America/Port_of_Spain America/Tortola	# Virgin Islands (UK)
       
  1728 
       
  1729 # Uruguay
       
  1730 # From Paul Eggert (1993-11-18):
       
  1731 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
       
  1732 #
       
  1733 # From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael
       
  1734 # Deckers (2018-02-20):
       
  1735 # ... At least they kept good records...
       
  1736 #
       
  1737 # http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36
       
  1738 # Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and
       
  1739 # Meteorology Service of the Uruguayan Navy, seems to give many transitions
       
  1740 # with greater clarity than we've had before.  It directly references many laws
       
  1741 # and decrees which are, in turn, referenced below.  They can be viewed in the
       
  1742 # public archives of the Diario Oficial (in Spanish) at
       
  1743 # http://www.impo.com.uy/diariooficial/
       
  1744 #
       
  1745 # Ley No. 3920 of 1908-06-10 placed the determination of legal time under the
       
  1746 # auspices of the National Institute for the Prediction of Time.  It is unclear
       
  1747 # exactly what offset was used during this period, though Ley No. 7200 of
       
  1748 # 1920-04-23 used the Observatory of the National Meteorological Institute in
       
  1749 # Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian,
       
  1750 # retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00,
       
  1751 # resulting in UT-04.  Assume the corresponding LMT of UT-03:44:51 (given on
       
  1752 # page 725 of the Proceedings of the Second Pan-American Scientific Congress,
       
  1753 # 1915-1916) was in use, and merely became official from 1908-06-10.
       
  1754 # https://www.impo.com.uy/diariooficial/1908/06/18/12
       
  1755 # https://www.impo.com.uy/diariooficial/1920/04/27/9
       
  1756 #
       
  1757 # Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced
       
  1758 # by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14
       
  1759 # minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the
       
  1760 # National Council of Administration the same day, published directly below the
       
  1761 # law in the Diario Oficial, specified the first transition to be 1923-09-30
       
  1762 # 24:00.  This effectively established standard time at UT-03:30 with 30
       
  1763 # minutes DST.  Assume transitions at 24:00 on the specified days until Ley No.
       
  1764 # 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other
       
  1765 # provisions which oppose" it, resulting in year-round UT-03:30; a Resolución
       
  1766 # of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it
       
  1767 # would have been under the previous law.
       
  1768 # https://www.impo.com.uy/diariooficial/1923/07/02/2
       
  1769 # https://www.impo.com.uy/diariooficial/1926/03/10/2
       
  1770 # https://www.impo.com.uy/diariooficial/1926/03/18/2
       
  1771 #
       
  1772 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
       
  1773 Rule	Uruguay	1923	1925	-	Oct	 1	 0:00	0:30	-
       
  1774 Rule	Uruguay	1924	1926	-	Apr	 1	 0:00	0	-
       
  1775 # From Tim Parenti (2018-02-15):
       
  1776 # http://www.impo.com.uy/diariooficial/1933/10/27/6
       
  1777 #
       
  1778 # It appears Ley No. 9122 of 1933 was never published as such in the Diario
       
  1779 # Oficial, but instead appeared as Document 26 in the Diario on Friday
       
  1780 # 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of
       
  1781 # National Defense.  It reinstituted a DST of 30 minutes (to UT-03) "from the
       
  1782 # last Sunday of October...until the last Saturday of March."  In accordance
       
  1783 # with this provision, the first transition was explicitly specified in Article
       
  1784 # 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29
       
  1785 # at 00:00.  Assume transitions at 00:00 Sunday throughout.
       
  1786 #
       
  1787 # Departing from the matter-of-fact nature of previous timekeeping laws, the
       
  1788 # 1933 decree "consider[s] the advantages of...the advance of legal time":
       
  1789 #
       
  1790 #   "Whereas: The measure adopted by almost all nations at the time of the last
       
  1791 #    World War still persists in North America and Europe, precisely because of
       
  1792 #    the economic, hygienic, and social advantages derived from such an
       
  1793 #    emergency measure...
       
  1794 #
       
  1795 #    Whereas: The advance of the legal time during the summer seasons, by
       
  1796 #    displacing social activity near sunrise, favors the citizen populations
       
  1797 #    and especially the society that creates and works..."
       
  1798 #
       
  1799 # It further specified that "necessary measures" be taken to ensure that
       
  1800 # "public spectacles finish, in general, before [01:00]."
       
  1801 Rule	Uruguay	1933	1938	-	Oct	lastSun	 0:00	0:30	-
       
  1802 Rule	Uruguay	1934	1941	-	Mar	lastSat	24:00	0	-
       
  1803 # From Tim Parenti (2018-02-15):
       
  1804 # Most of the Rules below, and their contemporaneous Zone lines, have been
       
  1805 # updated simply to match the Almanaque 2018.  Although the document does not
       
  1806 # list exact transition times, midnight transitions were already present in our
       
  1807 # data here for all transitions through 2004-09, and this is both consistent
       
  1808 # with prior transitions and verified in several decrees marked below between
       
  1809 # 1939-09 and 2004-09, wherein the relevant text was typically of the form:
       
  1810 #
       
  1811 #   "From 0 hours on [date], the legal time of the entire Republic will be...
       
  1812 #
       
  1813 #    In accordance with [the preceding], on [previous date] at 24 hours, all
       
  1814 #    clocks throughout the Republic will be [advanced/retarded] by..."
       
  1815 #
       
  1816 # It is possible that there is greater specificity to be found for the Rules
       
  1817 # below, but it is buried in no fewer than 40 different decrees individually
       
  1818 # referenced by the Almanaque for the period from 1939-09 to 2014-09.
       
  1819 # Four-fifths of these were promulgated less than two weeks before taking
       
  1820 # effect; more than half within a week and none more than 5 weeks.  Only the
       
  1821 # handful with comments below have been checked with any thoroughness.
       
  1822 Rule	Uruguay	1939	only	-	Oct	 1	 0:00	0:30	-
       
  1823 Rule	Uruguay	1940	only	-	Oct	27	 0:00	0:30	-
       
  1824 # From Tim Parenti (2018-02-15):
       
  1825 # Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified
       
  1826 # UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel".
       
  1827 # http://www.impo.com.uy/diariooficial/1941/08/04/1
       
  1828 Rule	Uruguay	1941	only	-	Aug	 1	 0:00	0:30	-
       
  1829 # From Tim Parenti (2018-02-15):
       
  1830 # Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified
       
  1831 # further advancement (to UT-02:30) from Sunday 1942-12-13 24:00.  Since clocks
       
  1832 # never went back to UT-03:30 thereafter, this is modeled as advancing standard
       
  1833 # time by 30 minutes to UT-03, while retaining 30 minutes of DST.
       
  1834 # http://www.impo.com.uy/diariooficial/1942/12/16/3
       
  1835 Rule	Uruguay	1942	only	-	Dec	14	 0:00	0:30	-
       
  1836 Rule	Uruguay	1943	only	-	Mar	14	 0:00	0	-
       
  1837 Rule	Uruguay	1959	only	-	May	24	 0:00	0:30	-
       
  1838 Rule	Uruguay	1959	only	-	Nov	15	 0:00	0	-
       
  1839 Rule	Uruguay	1960	only	-	Jan	17	 0:00	1:00	-
       
  1840 Rule	Uruguay	1960	only	-	Mar	 6	 0:00	0	-
       
  1841 Rule	Uruguay	1965	only	-	Apr	 4	 0:00	1:00	-
       
  1842 Rule	Uruguay	1965	only	-	Sep	26	 0:00	0	-
       
  1843 # From Tim Parenti (2018-02-15):
       
  1844 # Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the
       
  1845 # day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00.
       
  1846 # http://www.impo.com.uy/diariooficial/1968/05/30/5
       
  1847 Rule	Uruguay	1968	only	-	May	27	 0:00	0:30	-
       
  1848 Rule	Uruguay	1968	only	-	Dec	 1	 0:00	0	-
       
  1849 # From Tim Parenti (2018-02-15):
       
  1850 # Decreto 188/970 of 1970-04-23 instituted restrictions on electricity
       
  1851 # consumption "as a consequence of the current rainfall regime in the country".
       
  1852 # Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00.
       
  1853 # http://www.impo.com.uy/diariooficial/1970/04/29/4
       
  1854 Rule	Uruguay	1970	only	-	Apr	25	 0:00	1:00	-
       
  1855 Rule	Uruguay	1970	only	-	Jun	14	 0:00	0	-
       
  1856 Rule	Uruguay	1972	only	-	Apr	23	 0:00	1:00	-
       
  1857 Rule	Uruguay	1972	only	-	Jul	16	 0:00	0	-
       
  1858 # From Tim Parenti (2018-02-15):
       
  1859 # Decreto 29/974 of 1974-01-11, citing "the international rise in the price of
       
  1860 # oil", advanced clocks by 90 minutes (to UT-01:30).  Decreto 163/974 of
       
  1861 # 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30
       
  1862 # minutes followed in Decreto 679/974 of 1974-08-29.
       
  1863 # http://www.impo.com.uy/diariooficial/1974/01/22/11
       
  1864 # http://www.impo.com.uy/diariooficial/1974/03/14/3
       
  1865 # http://www.impo.com.uy/diariooficial/1974/09/04/6
       
  1866 Rule	Uruguay	1974	only	-	Jan	13	 0:00	1:30	-
       
  1867 Rule	Uruguay	1974	only	-	Mar	10	 0:00	0:30	-
       
  1868 Rule	Uruguay	1974	only	-	Sep	 1	 0:00	0	-
       
  1869 Rule	Uruguay	1974	only	-	Dec	22	 0:00	1:00	-
       
  1870 Rule	Uruguay	1975	only	-	Mar	30	 0:00	0	-
       
  1871 Rule	Uruguay	1976	only	-	Dec	19	 0:00	1:00	-
       
  1872 Rule	Uruguay	1977	only	-	Mar	 6	 0:00	0	-
       
  1873 Rule	Uruguay	1977	only	-	Dec	 4	 0:00	1:00	-
       
  1874 Rule	Uruguay	1978	1979	-	Mar	Sun>=1	 0:00	0	-
       
  1875 Rule	Uruguay	1978	only	-	Dec	17	 0:00	1:00	-
       
  1876 Rule	Uruguay	1979	only	-	Apr	29	 0:00	1:00	-
       
  1877 Rule	Uruguay	1980	only	-	Mar	16	 0:00	0	-
       
  1878 # From Tim Parenti (2018-02-15):
       
  1879 # Decreto 725/987 of 1987-12-04 cited "better use of national tourist
       
  1880 # attractions" to advance clocks one hour from Monday 1987-12-14 00:00.
       
  1881 # http://www.impo.com.uy/diariooficial/1988/01/25/1
       
  1882 Rule	Uruguay	1987	only	-	Dec	14	 0:00	1:00	-
       
  1883 Rule	Uruguay	1988	only	-	Feb	28	 0:00	0	-
       
  1884 Rule	Uruguay	1988	only	-	Dec	11	 0:00	1:00	-
       
  1885 Rule	Uruguay	1989	only	-	Mar	 5	 0:00	0	-
       
  1886 Rule	Uruguay	1989	only	-	Oct	29	 0:00	1:00	-
       
  1887 Rule	Uruguay	1990	only	-	Feb	25	 0:00	0	-
       
  1888 # From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04):
       
  1889 # IATA agrees as below for 1990-10 through 1993-02.  Per Almanaque 2018, the
       
  1890 # 1992/1993 season appears to be the first in over half a century where DST
       
  1891 # both began and ended pursuant to the same decree.
       
  1892 Rule	Uruguay	1990	1991	-	Oct	Sun>=21	 0:00	1:00	-
       
  1893 Rule	Uruguay	1991	1992	-	Mar	Sun>=1	 0:00	0	-
       
  1894 Rule	Uruguay	1992	only	-	Oct	18	 0:00	1:00	-
       
  1895 Rule	Uruguay	1993	only	-	Feb	28	 0:00	0	-
       
  1896 # From Eduardo Cota (2004-09-20):
       
  1897 # The Uruguayan government has decreed a change in the local time....
       
  1898 # From Tim Parenti (2018-02-15):
       
  1899 # Decreto 328/004 of 2004-09-15.
       
  1900 # http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1
       
  1901 Rule	Uruguay	2004	only	-	Sep	19	 0:00	1:00	-
       
  1902 # From Steffen Thorsen (2005-03-11):
       
  1903 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
       
  1904 # save energy ... it was postponed two weeks....
       
  1905 # From Tim Parenti (2018-02-15):
       
  1906 # This 2005 postponement is not in Almanaque 2018.  Go with the contemporaneous
       
  1907 # reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending
       
  1908 # Decreto 328/004:
       
  1909 # http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1
       
  1910 # The original decree specified a transition of 2005-03-12 24:00, but the new
       
  1911 # one specified 2005-03-27 02:00.
       
  1912 Rule	Uruguay	2005	only	-	Mar	27	 2:00	0	-
       
  1913 # From Eduardo Cota (2005-09-27):
       
  1914 # ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time,
       
  1915 # official time in Uruguay will be at GMT -2.
       
  1916 # From Tim Parenti (2018-02-15):
       
  1917 # Decreto 318/005 of 2005-09-19.
       
  1918 # http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1
       
  1919 Rule	Uruguay	2005	only	-	Oct	 9	 2:00	1:00	-
       
  1920 Rule	Uruguay	2006	2015	-	Mar	Sun>=8	 2:00	0	-
       
  1921 # From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06):
       
  1922 # Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday
       
  1923 # of October at 02:00 through the second Sunday of March at 02:00.  Almanaque
       
  1924 # 2018 appears to have a few typoed dates through this period; ignore them.
       
  1925 # http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1
       
  1926 Rule	Uruguay	2006	2014	-	Oct	Sun>=1	 2:00	1:00	-
       
  1927 # From Steffen Thorsen (2015-06-30):
       
  1928 # ... it looks like they will not be using DST the coming summer:
       
  1929 # http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
       
  1930 # http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/
       
  1931 # From Paul Eggert (2015-06-30):
       
  1932 # Apparently restaurateurs complained that DST caused people to go to the beach
       
  1933 # instead of out to dinner.
       
  1934 # From Pablo Camargo (2015-07-13):
       
  1935 # http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
       
  1936 # From Tim Parenti (2018-02-15):
       
  1937 # Decreto 178/015 of 2015-06-29; repeals Decreto 311/006.
       
  1938 
       
  1939 # This Zone can be simplified once we assume zic %z.
       
  1940 Zone America/Montevideo	-3:44:51 -	LMT	1908 Jun 10
       
  1941 			-3:44:51 -	MMT	1920 May  1 # Montevideo MT
       
  1942 			-4:00	-	-04	1923 Oct  1
       
  1943 			-3:30	Uruguay	-0330/-03 1942 Dec 14
       
  1944 			-3:00	Uruguay	-03/-0230 1960
       
  1945 			-3:00	Uruguay	-03/-02	1968
       
  1946 			-3:00	Uruguay	-03/-0230 1970
       
  1947 			-3:00	Uruguay	-03/-02	1974
       
  1948 			-3:00	Uruguay	-03/-0130 1974 Mar 10
       
  1949 			-3:00	Uruguay	-03/-0230 1974 Dec 22
       
  1950 			-3:00	Uruguay	-03/-02
       
  1951 
       
  1952 # Venezuela
       
  1953 #
       
  1954 # From Paul Eggert (2015-07-28):
       
  1955 # For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533
       
  1956 # http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf
       
  1957 #
       
  1958 # From John Stainforth (2007-11-28):
       
  1959 # ... the change for Venezuela originally expected for 2007-12-31 has
       
  1960 # been brought forward to 2007-12-09.  The official announcement was
       
  1961 # published today in the "Gaceta Oficial de la República Bolivariana
       
  1962 # de Venezuela, número 38.819" (official document for all laws or
       
  1963 # resolution publication)
       
  1964 # http://www.globovision.com/news.php?nid=72208
       
  1965 
       
  1966 # From Alexander Krivenyshev (2016-04-15):
       
  1967 # https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino
       
  1968 #
       
  1969 # From Paul Eggert (2016-04-15):
       
  1970 # Clocks advance 30 minutes on 2016-05-01 at 02:30....
       
  1971 # "'Venezuela's new time-zone: hours without light, hours without water,
       
  1972 # hours of presidential broadcasts, hours of lines,' quipped comedian
       
  1973 # Jean Mary Curró ...". See: Cawthorne A, Kai D. Venezuela scraps
       
  1974 # half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400
       
  1975 # https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE
       
  1976 #
       
  1977 # From Matt Johnson (2016-04-20):
       
  1978 # ... published in the official Gazette [2016-04-18], here:
       
  1979 # http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf
       
  1980 
       
  1981 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
       
  1982 Zone	America/Caracas	-4:27:44 -	LMT	1890
       
  1983 			-4:27:40 -	CMT	1912 Feb 12 # Caracas Mean Time?
       
  1984 			-4:30	-	-0430	1965 Jan  1  0:00
       
  1985 			-4:00	-	-04	2007 Dec  9  3:00
       
  1986 			-4:30	-	-0430	2016 May  1  2:30
       
  1987 			-4:00	-	-04