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1# @(#)southamerica 7.42
2
3# $FreeBSD: head/share/zoneinfo/southamerica 86222 2001-11-09 19:17:59Z wollman $
4
5# This data is by no means authoritative; if you think you know better,
6# go ahead and edit the file (and please send any changes to
7# tz@elsie.nci.nih.gov for general use in the future).
8
9# From Paul Eggert <eggert@twinsun.com> (1999-07-07):
10# A good source for time zone historical data outside the U.S. is
11# Thomas G. Shanks, The International Atlas (5th edition),
12# San Diego: ACS Publications, Inc. (1999).
13#
14# Gwillim Law writes that a good source
15# for recent time zone data is the International Air Transport
16# Association's Standard Schedules Information Manual (IATA SSIM),
17# published semiannually. Law sent in several helpful summaries
18# of the IATA's data after 1990.
19#
20# Except where otherwise noted, Shanks is the source for entries through 1990,
21# and IATA SSIM is the source for entries after 1990.
22#

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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 Fabian L. Arce Jofre <farcejofre@bigfoot.com> (2000-04-04):
126# The law that claimed DST for Argentina was derogated by President Fernando
127# de la Rua 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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
154#
155# Buenos Aires (BA), Capital Federal (CF), Santa Cruz (SC),
156# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
157Zone America/Buenos_Aires -3:53:48 - LMT 1894 Nov
158 -4:16:44 - CMT 1920 May # Cordoba Mean Time
159 -4:00 - ART 1930 Dec
160 -4:00 Arg AR%sT 1969 Oct 5

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226# Zone NAME GMTOFF RULES FORMAT [UNTIL]
227Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
228 -4:30 - ANT 1965 # Netherlands Antilles Time
229 -4:00 - AST
230
231# Bolivia
232# Zone NAME GMTOFF RULES FORMAT [UNTIL]
233Zone America/La_Paz -4:32:36 - LMT 1890
234 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
235 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
236 -4:00 - BOT # Bolivia Time
237
238# Brazil
239
240# From Paul Eggert <eggert@twinsun.com> (1993-11-18):
241# The mayor of Rio recently attempted to change the time zone rules
242# just in his city, in order to leave more summer time for the tourist trade.

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402Rule Brazil 1999 only - Oct 3 0:00 1:00 S
403Rule Brazil 2000 only - Feb 27 0:00 0 -
404# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
405# adopted by the same states as before.
406# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
407# repeals DST in PE and RR, effective 2000-10-15 00:00.
408# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
409# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
410# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
411# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
412#
413# The latest decree listed above says that the following states observe DST:
414# AL, BA, CE, DF, ES, GO, MA, MG, MS, MT,
415# PB, PE, PI, PR, RJ, RN, RS, SC, SE, SP, TO.
416#
417# For dates after mid-2002, the following rules are guesses
418# and are quite possibly wrong, but are more likely than no DST at all.
419Rule Brazil 2000 max - Oct Sun>=8 0:00 1:00 S
420Rule Brazil 2001 max - Feb Sun>=15 0:00 0 -
421
422
423# Zone NAME GMTOFF RULES FORMAT [UNTIL]
424#
425# Atlantic islands: Fernando de Noronha, Trindade, Martin Vaz,

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435 -3:00 - BRT
436#
437# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
438# Paraiba (PB)
439Zone America/Fortaleza -2:34:00 - LMT 1914
440 -3:00 Brazil BR%sT 1990 Sep 17
441 -3:00 - BRT 1999 Sep 30
442 -3:00 Brazil BR%sT 2000 Oct 22
443 -3:00 - BRT 2001 Sep 13
444 -3:00 Brazil BR%sT
445#
446# Pernambuco (PE) (except Atlantic islands)
447Zone America/Recife -2:19:36 - LMT 1914
448 -3:00 Brazil BR%sT 1990 Sep 17
449 -3:00 - BRT 1999 Sep 30
450 -3:00 Brazil BR%sT 2000 Oct 15
451 -3:00 - BRT 2001 Sep 13
452 -3:00 Brazil BR%sT
453#
454# Tocantins (TO)
455Zone America/Araguaina -3:12:48 - LMT 1914
456 -3:00 Brazil BR%sT 1990 Sep 17
457 -3:00 - BRT 1995 Sep 14
458 -3:00 Brazil BR%sT
459#
460# Alagoas (AL), Sergipe (SE)
461Zone America/Maceio -2:22:52 - LMT 1914
462 -3:00 Brazil BR%sT 1990 Sep 17
463 -3:00 - BRT 1995 Oct 13
464 -3:00 Brazil BR%sT 1996 Sep 4
465 -3:00 - BRT 1999 Sep 30
466 -3:00 Brazil BR%sT 2000 Oct 22
467 -3:00 - BRT 2001 Sep 13
468 -3:00 Brazil BR%sT
469#
470# Bahia (BA), Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
471# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
472# Santa Catarina (SC), Rio Grande do Sul (RS)
473Zone America/Sao_Paulo -3:06:28 - LMT 1914
474 -3:00 Brazil BR%sT 1963 Oct 23 00:00
475 -3:00 1:00 BRST 1964
476 -3:00 Brazil BR%sT
477#
478# Mato Grosso (MT), Mato Grosso do Sul (MS)
479Zone America/Cuiaba -3:44:20 - LMT 1914
480 -4:00 Brazil AM%sT
481#
482# west Para (PA), Rondonia (RO)
483# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
484Zone America/Porto_Velho -4:15:36 - LMT 1914
485 -4:00 Brazil AM%sT 1988 Sep 12
486 -4:00 - AMT

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522# Because of the drought this year, the government decided to go into
523# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
524# (unless there's another dry season next year, I guess).
525
526# From Julio I. Pacheco Troncoso (1999-03-18):
527# Because of the same drought, the government decided to end DST later,
528# on April 3, (one-time change).
529
530# From Gwillim Law (2001-05-04):
531# I came across another article in "La Tercera" about Chilean DST.
532# <http://www.tercera.cl/diario/2000/10/13/t-extras.html>
533# It clearly confirms my earlier suggestion, that DST begins at 22:00
534# on Easter Island.... But it also seems to be saying that the
535# observance of DST in Chile began in 1966, rather than 1969 as
536# ... [Shanks] has it....
537#
538# My translation:
539#
540# "The Chilean Army has announced that summer time will begin tomorrow,
541# Saturday, October 14 in continental Chile, insular Chile, and
542# Antarctica, as provided by Supreme Decree 25 of January 11, 1966.
543# By the preceding, official time in continental Chile and Chilean
544# Antarctic, and official time in Western Insular Chile, which applies
545# to Easter Island and Sala y Gomez Island, will be set forward at
546# midnight and at 22:00, respectively, by 20 minutes."
547
548# From Paul Eggert (2001-05-04):
549# Go with this article in preference to Shanks's 1969 date for modern DST.
550# Assume this rule has been used since DST was introduced in the islands.
551
552# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
553Rule Chile 1918 only - Sep 1 0:00 1:00 S
554Rule Chile 1919 only - Jul 2 0:00 0 -
555Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
556Rule Chile 1928 1932 - Apr 1 0:00 0 -
557Rule Chile 1966 1997 - Oct Sun>=9 4:00u 1:00 S
558Rule Chile 1967 1998 - Mar Sun>=9 3:00u 0 -
559Rule Chile 1998 only - Sep 27 4:00u 1:00 S
560Rule Chile 1999 only - Apr 4 3:00u 0 -
561Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
562Rule Chile 2000 max - Mar Sun>=9 3:00u 0 -
563# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14;
564# (1996-09) says 1998-03-08. Ignore these.
565# Zone NAME GMTOFF RULES FORMAT [UNTIL]
566Zone America/Santiago -4:42:40 - LMT 1890
567 -4:42:40 - SMT 1910 # Santiago Mean Time
568 -5:00 Chile CL%sT 1932 Sep # Chile Time
569 -4:00 Chile CL%sT
570Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri
571 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time
572 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time
573 -6:00 Chile EAS%sT
574#
575# Sala y Gomez Island is like Pacific/Easter.
576# Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
577# San Felix, and Antarctic bases, are like America/Santiago.
578
579# Colombia
580# Shanks specifies 24:00 for 1992 transition times; go with IATA,
581# as it seems implausible to change clocks at midnight New Year's Eve.
582# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
583Rule CO 1992 only - May 2 0:00 1:00 S
584Rule CO 1992 only - Dec 31 0:00 0 -
585# Zone NAME GMTOFF RULES FORMAT [UNTIL]
586Zone America/Bogota -4:56:20 - LMT 1884 Mar 13

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755Rule Peru 1987 only - Apr 1 0:00 0 -
756Rule Peru 1990 only - Jan 1 0:00 1:00 S
757Rule Peru 1990 only - Apr 1 0:00 0 -
758# IATA is ambiguous for 1993/1995; go with Shanks.
759Rule Peru 1994 only - Jan 1 0:00 1:00 S
760Rule Peru 1994 only - Apr 1 0:00 0 -
761# Zone NAME GMTOFF RULES FORMAT [UNTIL]
762Zone America/Lima -5:08:12 - LMT 1890
763 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
764 -5:00 Peru PE%sT # Peru Time
765
766# South Georgia
767# Zone NAME GMTOFF RULES FORMAT [UNTIL]
768Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
769 -2:00 - GST # South Georgia Time
770
771# South Sandwich Is

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840Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
841 -3:44:44 - MMT 1920 May 1 # Montevideo MT
842 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
843 -3:00 Uruguay UY%sT
844
845# Venezuela
846# Zone NAME GMTOFF RULES FORMAT [UNTIL]
847Zone America/Caracas -4:27:44 - LMT 1890
848 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
849 -4:30 - VET 1965 # Venezuela Time
850 -4:00 - VET