southamerica (4b8ee424cacf91875c8edca00ba30e7371c5f230) southamerica (3508b934406b57239ce54689e72345bb2813affd)
1# This file is in the public domain, so clarified as of
2# 2009-05-17 by Arthur David Olson.
3
4# This file is by no means authoritative; if you think you know better,
5# go ahead and edit the file (and please send any changes to
6# tz@iana.org for general use in the future). For more, please see
7# the file CONTRIBUTING in the tz distribution.
8

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42# From U. S. Naval Observatory (1988-01-19):
43# ARGENTINA 3 H BEHIND UTC
44
45# From Hernan G. Otero (1995-06-26):
46# I am sending modifications to the Argentine time zone table...
47# AR was chosen because they are the ISO letters that represent Argentina.
48
49# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1# This file is in the public domain, so clarified as of
2# 2009-05-17 by Arthur David Olson.
3
4# This file is by no means authoritative; if you think you know better,
5# go ahead and edit the file (and please send any changes to
6# tz@iana.org for general use in the future). For more, please see
7# the file CONTRIBUTING in the tz distribution.
8

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42# From U. S. Naval Observatory (1988-01-19):
43# ARGENTINA 3 H BEHIND UTC
44
45# From Hernan G. Otero (1995-06-26):
46# I am sending modifications to the Argentine time zone table...
47# AR was chosen because they are the ISO letters that represent Argentina.
48
49# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
50Rule Arg 1930 only - Dec 1 0:00 1:00 S
50Rule Arg 1930 only - Dec 1 0:00 1:00 -
51Rule Arg 1931 only - Apr 1 0:00 0 -
51Rule Arg 1931 only - Apr 1 0:00 0 -
52Rule Arg 1931 only - Oct 15 0:00 1:00 S
52Rule Arg 1931 only - Oct 15 0:00 1:00 -
53Rule Arg 1932 1940 - Mar 1 0:00 0 -
53Rule Arg 1932 1940 - Mar 1 0:00 0 -
54Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
55Rule Arg 1940 only - Jul 1 0:00 1:00 S
54Rule Arg 1932 1939 - Nov 1 0:00 1:00 -
55Rule Arg 1940 only - Jul 1 0:00 1:00 -
56Rule Arg 1941 only - Jun 15 0:00 0 -
56Rule Arg 1941 only - Jun 15 0:00 0 -
57Rule Arg 1941 only - Oct 15 0:00 1:00 S
57Rule Arg 1941 only - Oct 15 0:00 1:00 -
58Rule Arg 1943 only - Aug 1 0:00 0 -
58Rule Arg 1943 only - Aug 1 0:00 0 -
59Rule Arg 1943 only - Oct 15 0:00 1:00 S
59Rule Arg 1943 only - Oct 15 0:00 1:00 -
60Rule Arg 1946 only - Mar 1 0:00 0 -
60Rule Arg 1946 only - Mar 1 0:00 0 -
61Rule Arg 1946 only - Oct 1 0:00 1:00 S
61Rule Arg 1946 only - Oct 1 0:00 1:00 -
62Rule Arg 1963 only - Oct 1 0:00 0 -
62Rule Arg 1963 only - Oct 1 0:00 0 -
63Rule Arg 1963 only - Dec 15 0:00 1:00 S
63Rule Arg 1963 only - Dec 15 0:00 1:00 -
64Rule Arg 1964 1966 - Mar 1 0:00 0 -
64Rule Arg 1964 1966 - Mar 1 0:00 0 -
65Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
65Rule Arg 1964 1966 - Oct 15 0:00 1:00 -
66Rule Arg 1967 only - Apr 2 0:00 0 -
66Rule Arg 1967 only - Apr 2 0:00 0 -
67Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
67Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 -
68Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
68Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
69Rule Arg 1974 only - Jan 23 0:00 1:00 S
69Rule Arg 1974 only - Jan 23 0:00 1:00 -
70Rule Arg 1974 only - May 1 0:00 0 -
70Rule Arg 1974 only - May 1 0:00 0 -
71Rule Arg 1988 only - Dec 1 0:00 1:00 S
71Rule Arg 1988 only - Dec 1 0:00 1:00 -
72#
73# From Hernan G. Otero (1995-06-26):
74# These corrections were contributed by InterSoft Argentina S.A.,
75# obtaining the data from the:
76# Talleres de Hidrografía Naval Argentina
77# (Argentine Naval Hydrography Institute)
78Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
72#
73# From Hernan G. Otero (1995-06-26):
74# These corrections were contributed by InterSoft Argentina S.A.,
75# obtaining the data from the:
76# Talleres de Hidrografía Naval Argentina
77# (Argentine Naval Hydrography Institute)
78Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
79Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
79Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 -
80#
81# From Hernan G. Otero (1995-06-26):
82# From this moment on, the law that mandated the daylight saving
83# time corrections was derogated and no more modifications
84# to the time zones (for daylight saving) are now made.
85#
86# From Rives McDow (2000-01-10):
87# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
88# which did not result in the switch of a time zone, as they stayed 9 hours
89# from the International Date Line.
80#
81# From Hernan G. Otero (1995-06-26):
82# From this moment on, the law that mandated the daylight saving
83# time corrections was derogated and no more modifications
84# to the time zones (for daylight saving) are now made.
85#
86# From Rives McDow (2000-01-10):
87# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
88# which did not result in the switch of a time zone, as they stayed 9 hours
89# from the International Date Line.
90Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
90Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 -
91# From Paul Eggert (2007-12-28):
92# DST was set to expire on March 5, not March 3, but since it was converted
93# to standard time on March 3 it's more convenient for us to pretend that
94# it ended on March 3.
95Rule Arg 2000 only - Mar 3 0:00 0 -
96#
97# From Peter Gradelski via Steffen Thorsen (2000-03-01):
98# We just checked with our São Paulo office and they say the government of

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185#
186# "Por el momento, el Gobierno Nacional resolvió no modificar la hora
187# oficial, decisión que estaba en estudio para su implementación el
188# domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
189# que la Argentina hoy, en estas condiciones meteorológicas, no necesita
190# la modificación del huso horario, ya que 2009 nos encuentra con
191# crecimiento en la producción y distribución energética."
192
91# From Paul Eggert (2007-12-28):
92# DST was set to expire on March 5, not March 3, but since it was converted
93# to standard time on March 3 it's more convenient for us to pretend that
94# it ended on March 3.
95Rule Arg 2000 only - Mar 3 0:00 0 -
96#
97# From Peter Gradelski via Steffen Thorsen (2000-03-01):
98# We just checked with our São Paulo office and they say the government of

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185#
186# "Por el momento, el Gobierno Nacional resolvió no modificar la hora
187# oficial, decisión que estaba en estudio para su implementación el
188# domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
189# que la Argentina hoy, en estas condiciones meteorológicas, no necesita
190# la modificación del huso horario, ya que 2009 nos encuentra con
191# crecimiento en la producción y distribución energética."
192
193Rule Arg 2007 only - Dec 30 0:00 1:00 S
193Rule Arg 2007 only - Dec 30 0:00 1:00 -
194Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
194Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
195Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
195Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 -
196
197# From Mariano Absatz (2004-05-21):
198# Today it was officially published that the Province of Mendoza is changing
199# its timezone this winter... starting tomorrow night....
200# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
201# From Paul Eggert (2004-05-24):
202# It's Law No. 7,210. This change is due to a public power emergency, so for
203# now we'll assume it's for this year only.
204#
196
197# From Mariano Absatz (2004-05-21):
198# Today it was officially published that the Province of Mendoza is changing
199# its timezone this winter... starting tomorrow night....
200# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
201# From Paul Eggert (2004-05-24):
202# It's Law No. 7,210. This change is due to a public power emergency, so for
203# now we'll assume it's for this year only.
204#
205# From Paul Eggert (2014-08-09):
205# From Paul Eggert (2018-01-31):
206# Hora de verano para la República Argentina
207# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
208# says that standard time in Argentina from 1894-10-31
209# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
206# Hora de verano para la República Argentina
207# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
208# says that standard time in Argentina from 1894-10-31
209# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
210# over Shanks & Pottenger.
210# over Shanks & Pottenger. It is upward compatible with Milne, who
211# says Córdoba time was -4:16:48.2.
212
211#
212# From Mariano Absatz (2004-06-05):
213# These media articles from a major newspaper mostly cover the current state:
214# http://www.lanacion.com.ar/04/05/27/de_604825.asp
215# http://www.lanacion.com.ar/04/05/28/de_605203.asp
216#
217# The following eight (8) provinces pulled clocks back to UTC-04:00 at
218# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).

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376# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
377
378# From Mariano Absatz (2010-04-12):
379# yes...I can confirm this...and given that San Luis keeps calling
380# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
381# rules...San Luis is still using "Western ARgentina Time" and it got
382# stuck on Summer daylight savings time even though the summer is over.
383
213#
214# From Mariano Absatz (2004-06-05):
215# These media articles from a major newspaper mostly cover the current state:
216# http://www.lanacion.com.ar/04/05/27/de_604825.asp
217# http://www.lanacion.com.ar/04/05/28/de_605203.asp
218#
219# The following eight (8) provinces pulled clocks back to UTC-04:00 at
220# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).

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378# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
379
380# From Mariano Absatz (2010-04-12):
381# yes...I can confirm this...and given that San Luis keeps calling
382# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
383# rules...San Luis is still using "Western ARgentina Time" and it got
384# stuck on Summer daylight savings time even though the summer is over.
385
384# From Paul Eggert (2013-09-05):
386# From Paul Eggert (2018-01-23):
385# Perhaps San Luis operates on the legal fiction that it is at -04
387# Perhaps San Luis operates on the legal fiction that it is at -04
386# with perpetual summer time, but ordinary usage typically seems to
388# with perpetual daylight saving time, but ordinary usage typically seems to
387# just say it's at -03; see, for example,
388# https://es.wikipedia.org/wiki/Hora_oficial_argentina
389# We've documented similar situations as being plain changes to
390# standard time, so let's do that here too. This does not change UTC
391# offsets, only tm_isdst and the time zone abbreviations. One minor
392# plus is that this silences a zic complaint that there's no POSIX TZ
393# setting for time stamps past 2038.
394
389# just say it's at -03; see, for example,
390# https://es.wikipedia.org/wiki/Hora_oficial_argentina
391# We've documented similar situations as being plain changes to
392# standard time, so let's do that here too. This does not change UTC
393# offsets, only tm_isdst and the time zone abbreviations. One minor
394# plus is that this silences a zic complaint that there's no POSIX TZ
395# setting for time stamps past 2038.
396
395# From Paul Eggert (2013-02-21):
396# Milne says Córdoba time was -4:16:48.2. Round to the nearest second.
397
398# Zone NAME GMTOFF RULES FORMAT [UNTIL]
399#
400# Buenos Aires (BA), Capital Federal (CF),
401Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
402 -4:16:48 - CMT 1920 May # Córdoba Mean Time
403 -4:00 - -04 1930 Dec
404 -4:00 Arg -04/-03 1969 Oct 5
405 -3:00 Arg -03/-02 1999 Oct 3

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524 -3:00 - -03 2004 May 23
525 -4:00 - -04 2004 Sep 26
526 -3:00 Arg -03/-02 2008 Oct 18
527 -3:00 - -03
528#
529# San Luis (SL)
530
531Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
397# Zone NAME GMTOFF RULES FORMAT [UNTIL]
398#
399# Buenos Aires (BA), Capital Federal (CF),
400Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
401 -4:16:48 - CMT 1920 May # Córdoba Mean Time
402 -4:00 - -04 1930 Dec
403 -4:00 Arg -04/-03 1969 Oct 5
404 -3:00 Arg -03/-02 1999 Oct 3

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523 -3:00 - -03 2004 May 23
524 -4:00 - -04 2004 Sep 26
525 -3:00 Arg -03/-02 2008 Oct 18
526 -3:00 - -03
527#
528# San Luis (SL)
529
530Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
532Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S
531Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 -
533
534Zone America/Argentina/San_Luis -4:25:24 - 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
539 -3:00 1:00 -02 1990 Mar 14
540 -4:00 - -04 1990 Oct 15

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766# will change as well.
767#
768# From Paul Eggert (2013-10-17):
769# For now, assume western Amazonas will change as well.
770
771# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
772# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
773# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
532
533Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
534 -4:16:48 - CMT 1920 May
535 -4:00 - -04 1930 Dec
536 -4:00 Arg -04/-03 1969 Oct 5
537 -3:00 Arg -03/-02 1990
538 -3:00 1:00 -02 1990 Mar 14
539 -4:00 - -04 1990 Oct 15

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765# will change as well.
766#
767# From Paul Eggert (2013-10-17):
768# For now, assume western Amazonas will change as well.
769
770# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
771# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
772# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
774Rule Brazil 1931 only - Oct 3 11:00 1:00 S
773Rule Brazil 1931 only - Oct 3 11:00 1:00 -
775Rule Brazil 1932 1933 - Apr 1 0:00 0 -
774Rule Brazil 1932 1933 - Apr 1 0:00 0 -
776Rule Brazil 1932 only - Oct 3 0:00 1:00 S
775Rule Brazil 1932 only - Oct 3 0:00 1:00 -
777# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
778# revoked DST.
779# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
780# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
776# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
777# revoked DST.
778# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
779# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
781Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
780Rule Brazil 1949 1952 - Dec 1 0:00 1:00 -
782Rule Brazil 1950 only - Apr 16 1:00 0 -
783Rule Brazil 1951 1952 - Apr 1 0:00 0 -
784# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
785Rule Brazil 1953 only - Mar 1 0:00 0 -
786# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
787# revoked DST.
788# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
789# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
790# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
791# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
792# extended the above decree to all of the national territory on 12-09.
781Rule Brazil 1950 only - Apr 16 1:00 0 -
782Rule Brazil 1951 1952 - Apr 1 0:00 0 -
783# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
784Rule Brazil 1953 only - Mar 1 0:00 0 -
785# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
786# revoked DST.
787# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
788# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
789# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
790# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
791# extended the above decree to all of the national territory on 12-09.
793Rule Brazil 1963 only - Dec 9 0:00 1:00 S
792Rule Brazil 1963 only - Dec 9 0:00 1:00 -
794# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
795# extended summer time by one day to 1964-03-01 00:00 (start of school).
796Rule Brazil 1964 only - Mar 1 0:00 0 -
797# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
793# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
794# extended summer time by one day to 1964-03-01 00:00 (start of school).
795Rule Brazil 1964 only - Mar 1 0:00 0 -
796# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
798Rule Brazil 1965 only - Jan 31 0:00 1:00 S
797Rule Brazil 1965 only - Jan 31 0:00 1:00 -
799Rule Brazil 1965 only - Mar 31 0:00 0 -
800# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
798Rule Brazil 1965 only - Mar 31 0:00 0 -
799# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
801Rule Brazil 1965 only - Dec 1 0:00 1:00 S
800Rule Brazil 1965 only - Dec 1 0:00 1:00 -
802# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
803Rule Brazil 1966 1968 - Mar 1 0:00 0 -
801# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
802Rule Brazil 1966 1968 - Mar 1 0:00 0 -
804Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
803Rule Brazil 1966 1967 - Nov 1 0:00 1:00 -
805# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
806# revoked DST.
807# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
804# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
805# revoked DST.
806# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
808Rule Brazil 1985 only - Nov 2 0:00 1:00 S
807Rule Brazil 1985 only - Nov 2 0:00 1:00 -
809# Decree 92,310 (1986-01-21)
810# Decree 92,463 (1986-03-13)
811Rule Brazil 1986 only - Mar 15 0:00 0 -
812# Decree 93,316 (1986-10-01)
808# Decree 92,310 (1986-01-21)
809# Decree 92,463 (1986-03-13)
810Rule Brazil 1986 only - Mar 15 0:00 0 -
811# Decree 93,316 (1986-10-01)
813Rule Brazil 1986 only - Oct 25 0:00 1:00 S
812Rule Brazil 1986 only - Oct 25 0:00 1:00 -
814Rule Brazil 1987 only - Feb 14 0:00 0 -
815# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
813Rule Brazil 1987 only - Feb 14 0:00 0 -
814# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
816Rule Brazil 1987 only - Oct 25 0:00 1:00 S
815Rule Brazil 1987 only - Oct 25 0:00 1:00 -
817Rule Brazil 1988 only - Feb 7 0:00 0 -
818# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
819# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
816Rule Brazil 1988 only - Feb 7 0:00 0 -
817# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
818# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
820Rule Brazil 1988 only - Oct 16 0:00 1:00 S
819Rule Brazil 1988 only - Oct 16 0:00 1:00 -
821Rule Brazil 1989 only - Jan 29 0:00 0 -
822# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
823# with the same exceptions
820Rule Brazil 1989 only - Jan 29 0:00 0 -
821# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
822# with the same exceptions
824Rule Brazil 1989 only - Oct 15 0:00 1:00 S
823Rule Brazil 1989 only - Oct 15 0:00 1:00 -
825Rule Brazil 1990 only - Feb 11 0:00 0 -
826# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
827# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
828# Decree 99,629 (1990-10-19) adds BA, MT.
824Rule Brazil 1990 only - Feb 11 0:00 0 -
825# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
826# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
827# Decree 99,629 (1990-10-19) adds BA, MT.
829Rule Brazil 1990 only - Oct 21 0:00 1:00 S
828Rule Brazil 1990 only - Oct 21 0:00 1:00 -
830Rule Brazil 1991 only - Feb 17 0:00 0 -
831# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
832# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
829Rule Brazil 1991 only - Feb 17 0:00 0 -
830# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
831# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
833Rule Brazil 1991 only - Oct 20 0:00 1:00 S
832Rule Brazil 1991 only - Oct 20 0:00 1:00 -
834Rule Brazil 1992 only - Feb 9 0:00 0 -
835# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
836# adopted by same states.
833Rule Brazil 1992 only - Feb 9 0:00 0 -
834# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
835# adopted by same states.
837Rule Brazil 1992 only - Oct 25 0:00 1:00 S
836Rule Brazil 1992 only - Oct 25 0:00 1:00 -
838Rule Brazil 1993 only - Jan 31 0:00 0 -
839# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
840# adopted by same states, plus AM.
841# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
842# web page corrected 2004-01-07) adopted by same states, minus AM.
843# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
844# adopted by same states, plus MT and TO.
845# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
846# adds AL, SE.
837Rule Brazil 1993 only - Jan 31 0:00 0 -
838# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
839# adopted by same states, plus AM.
840# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
841# web page corrected 2004-01-07) adopted by same states, minus AM.
842# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
843# adopted by same states, plus MT and TO.
844# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
845# adds AL, SE.
847Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
846Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 -
848Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
849Rule Brazil 1996 only - Feb 11 0:00 0 -
850# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
851# adopted by same states, minus AL, SE.
847Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
848Rule Brazil 1996 only - Feb 11 0:00 0 -
849# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
850# adopted by same states, minus AL, SE.
852Rule Brazil 1996 only - Oct 6 0:00 1:00 S
851Rule Brazil 1996 only - Oct 6 0:00 1:00 -
853Rule Brazil 1997 only - Feb 16 0:00 0 -
854# From Daniel C. Sobral (1998-02-12):
855# In 1997, the DS began on October 6. The stated reason was that
856# because international television networks ignored Brazil's policy on DS,
857# they bought the wrong times on satellite for coverage of Pope's visit.
858# This year, the ending date of DS was postponed to March 1
859# to help dealing with the shortages of electric power.
860#
861# Decree 2,317 (1997-09-04), adopted by same states.
852Rule Brazil 1997 only - Feb 16 0:00 0 -
853# From Daniel C. Sobral (1998-02-12):
854# In 1997, the DS began on October 6. The stated reason was that
855# because international television networks ignored Brazil's policy on DS,
856# they bought the wrong times on satellite for coverage of Pope's visit.
857# This year, the ending date of DS was postponed to March 1
858# to help dealing with the shortages of electric power.
859#
860# Decree 2,317 (1997-09-04), adopted by same states.
862Rule Brazil 1997 only - Oct 6 0:00 1:00 S
861Rule Brazil 1997 only - Oct 6 0:00 1:00 -
863# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
864# (1998-02-10)
865Rule Brazil 1998 only - Mar 1 0:00 0 -
866# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
867# adopted by the same states as before.
862# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
863# (1998-02-10)
864Rule Brazil 1998 only - Mar 1 0:00 0 -
865# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
866# adopted by the same states as before.
868Rule Brazil 1998 only - Oct 11 0:00 1:00 S
867Rule Brazil 1998 only - Oct 11 0:00 1:00 -
869Rule Brazil 1999 only - Feb 21 0:00 0 -
870# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
871# (1999-08-23) adopted by same states.
872# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
873# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
868Rule Brazil 1999 only - Feb 21 0:00 0 -
869# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
870# (1999-08-23) adopted by same states.
871# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
872# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
874Rule Brazil 1999 only - Oct 3 0:00 1:00 S
873Rule Brazil 1999 only - Oct 3 0:00 1:00 -
875Rule Brazil 2000 only - Feb 27 0:00 0 -
876# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
877# adopted by the same states as before.
878# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
879# repeals DST in PE and RR, effective 2000-10-15 00:00.
880# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
881# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
882# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
883# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
874Rule Brazil 2000 only - Feb 27 0:00 0 -
875# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
876# adopted by the same states as before.
877# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
878# repeals DST in PE and RR, effective 2000-10-15 00:00.
879# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
880# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
881# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
882# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
884Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
883Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 -
885Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
886# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
887# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
884Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
885# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
886# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
888Rule Brazil 2002 only - Nov 3 0:00 1:00 S
887Rule Brazil 2002 only - Nov 3 0:00 1:00 -
889# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
890# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
888# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
889# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
891Rule Brazil 2003 only - Oct 19 0:00 1:00 S
890Rule Brazil 2003 only - Oct 19 0:00 1:00 -
892# Decree 5,223 (2004-10-01) reestablishes DST in MT.
893# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
891# Decree 5,223 (2004-10-01) reestablishes DST in MT.
892# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
894Rule Brazil 2004 only - Nov 2 0:00 1:00 S
893Rule Brazil 2004 only - Nov 2 0:00 1:00 -
895# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
896# adopted by the same states as before.
894# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
895# adopted by the same states as before.
897Rule Brazil 2005 only - Oct 16 0:00 1:00 S
896Rule Brazil 2005 only - Oct 16 0:00 1:00 -
898# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
899# adopted by the same states as before.
897# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
898# adopted by the same states as before.
900Rule Brazil 2006 only - Nov 5 0:00 1:00 S
899Rule Brazil 2006 only - Nov 5 0:00 1:00 -
901Rule Brazil 2007 only - Feb 25 0:00 0 -
902# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
903# adopted by the same states as before.
900Rule Brazil 2007 only - Feb 25 0:00 0 -
901# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
902# adopted by the same states as before.
904Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
903Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 -
905# From Frederico A. C. Neves (2008-09-10):
906# According to this decree
907# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
908# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
909# 3rd Feb Sunday. There is an exception on the return date when this is
910# the Carnival Sunday then the return date will be the next Sunday...
904# From Frederico A. C. Neves (2008-09-10):
905# According to this decree
906# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
907# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
908# 3rd Feb Sunday. There is an exception on the return date when this is
909# the Carnival Sunday then the return date will be the next Sunday...
911Rule Brazil 2008 2017 - Oct Sun>=15 0:00 1:00 S
910Rule Brazil 2008 2017 - Oct Sun>=15 0:00 1:00 -
912Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
913# Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13)
914# added Bahia.
915Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
916# Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15)
917# removed Bahia and added Tocantins.
918# Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30)
919# removed Tocantins.
920Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
921Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
922Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
923# From Steffen Thorsen (2017-12-18):
924# According to many media sources, next year's DST start in Brazil will move to
925# the first Sunday of November, and it will stay like that for the years after.
926# ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html
927# From Steffen Thorsen (2017-12-20):
928# http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm
911Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
912# Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13)
913# added Bahia.
914Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
915# Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15)
916# removed Bahia and added Tocantins.
917# Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30)
918# removed Tocantins.
919Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
920Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
921Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
922# From Steffen Thorsen (2017-12-18):
923# According to many media sources, next year's DST start in Brazil will move to
924# the first Sunday of November, and it will stay like that for the years after.
925# ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html
926# From Steffen Thorsen (2017-12-20):
927# http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm
929Rule Brazil 2018 max - Nov Sun>=1 0:00 1:00 S
928Rule Brazil 2018 max - Nov Sun>=1 0:00 1:00 -
930Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
931Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
932Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
933Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
934Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
935Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
936Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
937# From Arthur David Olson (2008-09-29):

--- 290 unchanged lines hidden (view full) ---

1228# http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf
1229# From Paul Eggert (2017-01-19):
1230# The above says the Magallanes change expires 2019-05-11 at 24:00,
1231# so in theory, they will revert to -04/-03 after that, which means
1232# they will switch from -03 to -04 one hour after Santiago does that day.
1233# For now, assume that they will not revert.
1234
1235# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
929Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
930Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
931Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
932Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
933Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
934Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
935Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
936# From Arthur David Olson (2008-09-29):

--- 290 unchanged lines hidden (view full) ---

1227# http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf
1228# From Paul Eggert (2017-01-19):
1229# The above says the Magallanes change expires 2019-05-11 at 24:00,
1230# so in theory, they will revert to -04/-03 after that, which means
1231# they will switch from -03 to -04 one hour after Santiago does that day.
1232# For now, assume that they will not revert.
1233
1234# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1236Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
1235Rule Chile 1927 1931 - Sep 1 0:00 1:00 -
1237Rule Chile 1928 1932 - Apr 1 0:00 0 -
1236Rule Chile 1928 1932 - Apr 1 0:00 0 -
1238Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1237Rule Chile 1968 only - Nov 3 4:00u 1:00 -
1239Rule Chile 1969 only - Mar 30 3:00u 0 -
1238Rule Chile 1969 only - Mar 30 3:00u 0 -
1240Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1239Rule Chile 1969 only - Nov 23 4:00u 1:00 -
1241Rule Chile 1970 only - Mar 29 3:00u 0 -
1242Rule Chile 1971 only - Mar 14 3:00u 0 -
1240Rule Chile 1970 only - Mar 29 3:00u 0 -
1241Rule Chile 1971 only - Mar 14 3:00u 0 -
1243Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1242Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 -
1244Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1243Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1245Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1246Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1244Rule Chile 1973 only - Sep 30 4:00u 1:00 -
1245Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 -
1247Rule Chile 1987 only - Apr 12 3:00u 0 -
1248Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 -
1246Rule Chile 1987 only - Apr 12 3:00u 0 -
1247Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 -
1249Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 S
1250Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1248Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 -
1249Rule Chile 1990 only - Sep 16 4:00u 1:00 -
1251Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1250Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1252Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1251Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 -
1253Rule Chile 1997 only - Mar 30 3:00u 0 -
1254Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1252Rule Chile 1997 only - Mar 30 3:00u 0 -
1253Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1255Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1254Rule Chile 1998 only - Sep 27 4:00u 1:00 -
1256Rule Chile 1999 only - Apr 4 3:00u 0 -
1255Rule Chile 1999 only - Apr 4 3:00u 0 -
1257Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
1256Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 -
1258Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1259# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1260# which is used below in specifying the transition.
1261Rule Chile 2008 only - Mar 30 3:00u 0 -
1262Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1263Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1264Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1257Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1258# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1259# which is used below in specifying the transition.
1260Rule Chile 2008 only - Mar 30 3:00u 0 -
1261Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1262Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1263Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1265Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1264Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 -
1266Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 -
1265Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 -
1267Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 S
1266Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 -
1268Rule Chile 2016 max - May Sun>=9 3:00u 0 -
1267Rule Chile 2016 max - May Sun>=9 3:00u 0 -
1269Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 S
1268Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 -
1270# IATA SSIM anomalies: (1992-02) says 1992-03-14;
1271# (1996-09) says 1998-03-08. Ignore these.
1272# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1273Zone America/Santiago -4:42:46 - LMT 1890
1274 -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time
1275 -5:00 - -05 1916 Jul 1
1276 -4:42:46 - SMT 1918 Sep 10
1277 -4:00 - -04 1919 Jul 1

--- 48 unchanged lines hidden (view full) ---

1326 -3:00 - -03
1327
1328# Colombia
1329
1330# Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes,
1331# "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1332
1333# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1269# IATA SSIM anomalies: (1992-02) says 1992-03-14;
1270# (1996-09) says 1998-03-08. Ignore these.
1271# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1272Zone America/Santiago -4:42:46 - LMT 1890
1273 -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time
1274 -5:00 - -05 1916 Jul 1
1275 -4:42:46 - SMT 1918 Sep 10
1276 -4:00 - -04 1919 Jul 1

--- 48 unchanged lines hidden (view full) ---

1325 -3:00 - -03
1326
1327# Colombia
1328
1329# Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes,
1330# "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1331
1332# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1334Rule CO 1992 only - May 3 0:00 1:00 S
1333Rule CO 1992 only - May 3 0:00 1:00 -
1335Rule CO 1993 only - Apr 4 0:00 0 -
1336# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1337Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1338 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time
1339 -5:00 CO -05/-04
1340# Malpelo, Providencia, San Andres
1341# no information; probably like America/Bogota
1342

--- 43 unchanged lines hidden (view full) ---

1386# not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics
1387# that included "Amanecía en mitad de la noche, los guaguas iban a clase sin
1388# sol" ("It was dawning in the middle of the night, the buses went to class
1389# without sun"). Although Ballén's campaign slogan was "Ni un paso atrás"
1390# (Not one step back), the clocks went back in 1993 and the experiment was not
1391# repeated. For now, assume transitions were at 00:00 local time country-wide.
1392#
1393# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1334Rule CO 1993 only - Apr 4 0:00 0 -
1335# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1336Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1337 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time
1338 -5:00 CO -05/-04
1339# Malpelo, Providencia, San Andres
1340# no information; probably like America/Bogota
1341

--- 43 unchanged lines hidden (view full) ---

1385# not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics
1386# that included "Amanecía en mitad de la noche, los guaguas iban a clase sin
1387# sol" ("It was dawning in the middle of the night, the buses went to class
1388# without sun"). Although Ballén's campaign slogan was "Ni un paso atrás"
1389# (Not one step back), the clocks went back in 1993 and the experiment was not
1390# repeated. For now, assume transitions were at 00:00 local time country-wide.
1391#
1392# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1394Rule Ecuador 1992 only - Nov 28 0:00 1:00 S
1393Rule Ecuador 1992 only - Nov 28 0:00 1:00 -
1395Rule Ecuador 1993 only - Feb 5 0:00 0 -
1396#
1397# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1398Zone America/Guayaquil -5:19:20 - LMT 1890
1399 -5:14:00 - QMT 1931 # Quito Mean Time
1400 -5:00 Ecuador -05/-04
1401Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1402 -5:00 - -05 1986

--- 73 unchanged lines hidden (view full) ---

1476# states...
1477# The current Atlantic/Stanley entry under South America expects the
1478# clocks to go back to standard Falklands Time (FKT) on the 15th April.
1479# The database entry states that in 2011 Stanley was staying on fixed
1480# summer time on a trial basis only. FIG need to contact IANA and/or
1481# the maintainers of the database to inform them we're adopting
1482# the same policy this year and suggest recommendations for future years.
1483#
1394Rule Ecuador 1993 only - Feb 5 0:00 0 -
1395#
1396# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1397Zone America/Guayaquil -5:19:20 - LMT 1890
1398 -5:14:00 - QMT 1931 # Quito Mean Time
1399 -5:00 Ecuador -05/-04
1400Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1401 -5:00 - -05 1986

--- 73 unchanged lines hidden (view full) ---

1475# states...
1476# The current Atlantic/Stanley entry under South America expects the
1477# clocks to go back to standard Falklands Time (FKT) on the 15th April.
1478# The database entry states that in 2011 Stanley was staying on fixed
1479# summer time on a trial basis only. FIG need to contact IANA and/or
1480# the maintainers of the database to inform them we're adopting
1481# the same policy this year and suggest recommendations for future years.
1482#
1484# For now we will assume permanent summer time for the Falklands
1483# For now we will assume permanent -03 for the Falklands
1485# until advised differently (to apply for 2012 and beyond, after the 2011
1486# experiment was apparently successful.)
1487# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1484# until advised differently (to apply for 2012 and beyond, after the 2011
1485# experiment was apparently successful.)
1486# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1488Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1487Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 -
1489Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1488Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1490Rule Falk 1939 only - Oct 1 0:00 1:00 S
1491Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1489Rule Falk 1939 only - Oct 1 0:00 1:00 -
1490Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 -
1492Rule Falk 1943 only - Jan 1 0:00 0 -
1491Rule Falk 1943 only - Jan 1 0:00 0 -
1493Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1492Rule Falk 1983 only - Sep lastSun 0:00 1:00 -
1494Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1493Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1495Rule Falk 1984 only - Sep 16 0:00 1:00 S
1496Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1494Rule Falk 1984 only - Sep 16 0:00 1:00 -
1495Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 -
1497Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1498Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1496Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1497Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1499Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1498Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 -
1500# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1501Zone Atlantic/Stanley -3:51:24 - LMT 1890
1502 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1503 -4:00 Falk -04/-03 1983 May
1504 -3:00 Falk -03/-02 1985 Sep 15
1505 -4:00 Falk -04/-03 2010 Sep 5 2:00
1506 -3:00 - -03
1507

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1526# and autumn transitions are 00:00 -> 23:00. Go with pre-1999
1527# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1528#
1529# From Waldemar Villamayor-Venialbo (2013-09-20):
1530# No time of the day is established for the adjustment, so people normally
1531# adjust their clocks at 0 hour of the given dates.
1532#
1533# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1499# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1500Zone Atlantic/Stanley -3:51:24 - LMT 1890
1501 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1502 -4:00 Falk -04/-03 1983 May
1503 -3:00 Falk -03/-02 1985 Sep 15
1504 -4:00 Falk -04/-03 2010 Sep 5 2:00
1505 -3:00 - -03
1506

--- 18 unchanged lines hidden (view full) ---

1525# and autumn transitions are 00:00 -> 23:00. Go with pre-1999
1526# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1527#
1528# From Waldemar Villamayor-Venialbo (2013-09-20):
1529# No time of the day is established for the adjustment, so people normally
1530# adjust their clocks at 0 hour of the given dates.
1531#
1532# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1534Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1533Rule Para 1975 1988 - Oct 1 0:00 1:00 -
1535Rule Para 1975 1978 - Mar 1 0:00 0 -
1536Rule Para 1979 1991 - Apr 1 0:00 0 -
1534Rule Para 1975 1978 - Mar 1 0:00 0 -
1535Rule Para 1979 1991 - Apr 1 0:00 0 -
1537Rule Para 1989 only - Oct 22 0:00 1:00 S
1538Rule Para 1990 only - Oct 1 0:00 1:00 S
1539Rule Para 1991 only - Oct 6 0:00 1:00 S
1536Rule Para 1989 only - Oct 22 0:00 1:00 -
1537Rule Para 1990 only - Oct 1 0:00 1:00 -
1538Rule Para 1991 only - Oct 6 0:00 1:00 -
1540Rule Para 1992 only - Mar 1 0:00 0 -
1539Rule Para 1992 only - Mar 1 0:00 0 -
1541Rule Para 1992 only - Oct 5 0:00 1:00 S
1540Rule Para 1992 only - Oct 5 0:00 1:00 -
1542Rule Para 1993 only - Mar 31 0:00 0 -
1541Rule Para 1993 only - Mar 31 0:00 0 -
1543Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1542Rule Para 1993 1995 - Oct 1 0:00 1:00 -
1544Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1545Rule Para 1996 only - Mar 1 0:00 0 -
1546# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1547# From Steffen Thorsen (2000-10-02):
1548# I have three independent reports that Paraguay changed to DST this Sunday
1549# (10-01).
1550#
1551# Translated by Gwillim Law (2001-02-27) from
1552# Noticias, a daily paper in Asunción, Paraguay (2000-10-01):
1553# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
1554# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1555# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1556# system has been operating for several years. Formerly there was a separate
1557# decree each year; the new law has the same effect, but permanently. Every
1558# year, the time will change on the first Sunday of October; likewise, the
1559# clock will be set back on the first Sunday of March.
1560#
1543Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1544Rule Para 1996 only - Mar 1 0:00 0 -
1545# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1546# From Steffen Thorsen (2000-10-02):
1547# I have three independent reports that Paraguay changed to DST this Sunday
1548# (10-01).
1549#
1550# Translated by Gwillim Law (2001-02-27) from
1551# Noticias, a daily paper in Asunción, Paraguay (2000-10-01):
1552# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
1553# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1554# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1555# system has been operating for several years. Formerly there was a separate
1556# decree each year; the new law has the same effect, but permanently. Every
1557# year, the time will change on the first Sunday of October; likewise, the
1558# clock will be set back on the first Sunday of March.
1559#
1561Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1560Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 -
1562# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1563Rule Para 1997 only - Feb lastSun 0:00 0 -
1564# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1565# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1566Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1567# From Rives McDow (2002-02-28):
1568# A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the
1569# dst method to be from the first Sunday in September to the first Sunday in
1570# April.
1571Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1561# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1562Rule Para 1997 only - Feb lastSun 0:00 0 -
1563# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1564# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1565Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1566# From Rives McDow (2002-02-28):
1567# A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the
1568# dst method to be from the first Sunday in September to the first Sunday in
1569# April.
1570Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1572Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1571Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 -
1573#
1574# From Jesper Nørgaard Welen (2005-01-02):
1575# There are several sources that claim that Paraguay made
1576# a timezone rule change in autumn 2004.
1577# From Steffen Thorsen (2005-01-05):
1578# Decree 1,867 (2004-03-05)
1579# From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
1580# http://www.presidencia.gov.py/decretos/D1867.pdf
1572#
1573# From Jesper Nørgaard Welen (2005-01-02):
1574# There are several sources that claim that Paraguay made
1575# a timezone rule change in autumn 2004.
1576# From Steffen Thorsen (2005-01-05):
1577# Decree 1,867 (2004-03-05)
1578# From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
1579# http://www.presidencia.gov.py/decretos/D1867.pdf
1581Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1580Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 -
1582Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1583# From Carlos Raúl Perasso (2010-02-18):
1584# By decree number 3958 issued yesterday
1585# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1586# Paraguay changes its DST schedule, postponing the March rule to April and
1587# modifying the October date. The decree reads:
1588# ...
1589# Art. 1. It is hereby established that from the second Sunday of the month of
1590# April of this year (2010), the official time is to be set back 60 minutes,
1591# and that on the first Sunday of the month of October, it is to be set
1592# forward 60 minutes, in all the territory of the Paraguayan Republic.
1593# ...
1581Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1582# From Carlos Raúl Perasso (2010-02-18):
1583# By decree number 3958 issued yesterday
1584# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1585# Paraguay changes its DST schedule, postponing the March rule to April and
1586# modifying the October date. The decree reads:
1587# ...
1588# Art. 1. It is hereby established that from the second Sunday of the month of
1589# April of this year (2010), the official time is to be set back 60 minutes,
1590# and that on the first Sunday of the month of October, it is to be set
1591# forward 60 minutes, in all the territory of the Paraguayan Republic.
1592# ...
1594Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1593Rule Para 2010 max - Oct Sun>=1 0:00 1:00 -
1595Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1596#
1597# From Steffen Thorsen (2013-03-07):
1598# Paraguay will end DST on 2013-03-24 00:00....
1599# http://www.ande.gov.py/interna.php?id=1075
1600#
1601# From Carlos Raúl Perasso (2013-03-15):
1602# The change in Paraguay is now final. Decree number 10780

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1619# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1620# When we were in Peru in 1985-1986, they apparently switched over
1621# sometime between December 29 and January 3 while we were on the Amazon.
1622#
1623# From Paul Eggert (2006-03-22):
1624# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1625
1626# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1594Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1595#
1596# From Steffen Thorsen (2013-03-07):
1597# Paraguay will end DST on 2013-03-24 00:00....
1598# http://www.ande.gov.py/interna.php?id=1075
1599#
1600# From Carlos Raúl Perasso (2013-03-15):
1601# The change in Paraguay is now final. Decree number 10780

--- 16 unchanged lines hidden (view full) ---

1618# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1619# When we were in Peru in 1985-1986, they apparently switched over
1620# sometime between December 29 and January 3 while we were on the Amazon.
1621#
1622# From Paul Eggert (2006-03-22):
1623# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1624
1625# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1627Rule Peru 1938 only - Jan 1 0:00 1:00 S
1626Rule Peru 1938 only - Jan 1 0:00 1:00 -
1628Rule Peru 1938 only - Apr 1 0:00 0 -
1627Rule Peru 1938 only - Apr 1 0:00 0 -
1629Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1628Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 -
1630Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1629Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1631Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1630Rule Peru 1986 1987 - Jan 1 0:00 1:00 -
1632Rule Peru 1986 1987 - Apr 1 0:00 0 -
1631Rule Peru 1986 1987 - Apr 1 0:00 0 -
1633Rule Peru 1990 only - Jan 1 0:00 1:00 S
1632Rule Peru 1990 only - Jan 1 0:00 1:00 -
1634Rule Peru 1990 only - Apr 1 0:00 0 -
1635# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1633Rule Peru 1990 only - Apr 1 0:00 0 -
1634# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1636Rule Peru 1994 only - Jan 1 0:00 1:00 S
1635Rule Peru 1994 only - Jan 1 0:00 1:00 -
1637Rule Peru 1994 only - Apr 1 0:00 0 -
1638# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1639Zone America/Lima -5:08:12 - LMT 1890
1640 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1641 -5:00 Peru -05/-04
1642
1643# South Georgia
1644# Zone NAME GMTOFF RULES FORMAT [UNTIL]

--- 29 unchanged lines hidden (view full) ---

1674Link America/Port_of_Spain America/St_Lucia
1675Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US)
1676Link America/Port_of_Spain America/St_Vincent
1677Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
1678
1679# Uruguay
1680# From Paul Eggert (1993-11-18):
1681# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1636Rule Peru 1994 only - Apr 1 0:00 0 -
1637# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1638Zone America/Lima -5:08:12 - LMT 1890
1639 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1640 -5:00 Peru -05/-04
1641
1642# South Georgia
1643# Zone NAME GMTOFF RULES FORMAT [UNTIL]

--- 29 unchanged lines hidden (view full) ---

1673Link America/Port_of_Spain America/St_Lucia
1674Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US)
1675Link America/Port_of_Spain America/St_Vincent
1676Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
1677
1678# Uruguay
1679# From Paul Eggert (1993-11-18):
1680# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1682# From Shanks & Pottenger:
1681#
1682# From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael
1683# Deckers (2018-02-20):
1684# ... At least they kept good records...
1685#
1686# http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36
1687# Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and
1688# Meteorology Service of the Uruguayan Navy, seems to give many transitions
1689# with greater clarity than we've had before. It directly references many laws
1690# and decrees which are, in turn, referenced below. They can be viewed in the
1691# public archives of the Diario Oficial (in Spanish) at
1692# http://www.impo.com.uy/diariooficial/
1693#
1694# Ley No. 3920 of 1908-06-10 placed the determination of legal time under the
1695# auspices of the National Institute for the Prediction of Time. It is unclear
1696# exactly what offset was used during this period, though Ley No. 7200 of
1697# 1920-04-23 used the Observatory of the National Meteorological Institute in
1698# Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian,
1699# retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00,
1700# resulting in UT-04. Assume the corresponding LMT of UT-03:44:51 (given on
1701# page 725 of the Proceedings of the Second Pan-American Scientific Congress,
1702# 1915-1916) was in use, and merely became official from 1908-06-10.
1703# https://www.impo.com.uy/diariooficial/1908/06/18/12
1704# https://www.impo.com.uy/diariooficial/1920/04/27/9
1705#
1706# Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced
1707# by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14
1708# minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the
1709# National Council of Administration the same day, published directly below the
1710# law in the Diario Oficial, specified the first transition to be 1923-09-30
1711# 24:00. This effectively established standard time at UT-03:30 with 30
1712# minutes DST. Assume transitions at 24:00 on the specified days until Ley No.
1713# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other
1714# provisions which oppose" it, resulting in year-round UT-03:30; a Resolución
1715# of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it
1716# would have been under the previous law.
1717# https://www.impo.com.uy/diariooficial/1923/07/02/2
1718# https://www.impo.com.uy/diariooficial/1926/03/10/2
1719# https://www.impo.com.uy/diariooficial/1926/03/18/2
1720#
1683# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1721# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1684# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1685Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1722Rule Uruguay 1923 1925 - Oct 1 0:00 0:30 -
1686Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1723Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1687Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1688Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1689# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1690Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1691Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1692Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1693# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1694Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1695# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1696# and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
1697Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1698Rule Uruguay 1942 only - Jan 1 0:00 0 -
1699Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1724# From Tim Parenti (2018-02-15):
1725# http://www.impo.com.uy/diariooficial/1933/10/27/6
1726#
1727# It appears Ley No. 9122 of 1933 was never published as such in the Diario
1728# Oficial, but instead appeared as Document 26 in the Diario on Friday
1729# 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of
1730# National Defense. It reinstituted a DST of 30 minutes (to UT-03) "from the
1731# last Sunday of October...until the last Saturday of March." In accordance
1732# with this provision, the first transition was explicitly specified in Article
1733# 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29
1734# at 00:00. Assume transitions at 00:00 Sunday throughout.
1735#
1736# Departing from the matter-of-fact nature of previous timekeeping laws, the
1737# 1933 decree "consider[s] the advantages of...the advance of legal time":
1738#
1739# "Whereas: The measure adopted by almost all nations at the time of the last
1740# World War still persists in North America and Europe, precisely because of
1741# the economic, hygienic, and social advantages derived from such an
1742# emergency measure...
1743#
1744# Whereas: The advance of the legal time during the summer seasons, by
1745# displacing social activity near sunrise, favors the citizen populations
1746# and especially the society that creates and works..."
1747#
1748# It further specified that "necessary measures" be taken to ensure that
1749# "public spectacles finish, in general, before [01:00]."
1750Rule Uruguay 1933 1938 - Oct lastSun 0:00 0:30 -
1751Rule Uruguay 1934 1941 - Mar lastSat 24:00 0 -
1752# From Tim Parenti (2018-02-15):
1753# Most of the Rules below, and their contemporaneous Zone lines, have been
1754# updated simply to match the Almanaque 2018. Although the document does not
1755# list exact transition times, midnight transitions were already present in our
1756# data here for all transitions through 2004-09, and this is both consistent
1757# with prior transitions and verified in several decrees marked below between
1758# 1939-09 and 2004-09, wherein the relevant text was typically of the form:
1759#
1760# "From 0 hours on [date], the legal time of the entire Republic will be...
1761#
1762# In accordance with [the preceding], on [previous date] at 24 hours, all
1763# clocks throughout the Republic will be [advanced/retarded] by..."
1764#
1765# It is possible that there is greater specificity to be found for the Rules
1766# below, but it is buried in no fewer than 40 different decrees individually
1767# referenced by the Almanaque for the period from 1939-09 to 2014-09.
1768# Four-fifths of these were promulgated less than two weeks before taking
1769# effect; more than half within a week and none more than 5 weeks. Only the
1770# handful with comments below have been checked with any thoroughness.
1771Rule Uruguay 1939 only - Oct 1 0:00 0:30 -
1772Rule Uruguay 1940 only - Oct 27 0:00 0:30 -
1773# From Tim Parenti (2018-02-15):
1774# Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified
1775# UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel".
1776# http://www.impo.com.uy/diariooficial/1941/08/04/1
1777Rule Uruguay 1941 only - Aug 1 0:00 0:30 -
1778# From Tim Parenti (2018-02-15):
1779# Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified
1780# further advancement (to UT-02:30) from Sunday 1942-12-13 24:00. Since clocks
1781# never went back to UT-03:30 thereafter, this is modeled as advancing standard
1782# time by 30 minutes to UT-03, while retaining 30 minutes of DST.
1783# http://www.impo.com.uy/diariooficial/1942/12/16/3
1784Rule Uruguay 1942 only - Dec 14 0:00 0:30 -
1700Rule Uruguay 1943 only - Mar 14 0:00 0 -
1785Rule Uruguay 1943 only - Mar 14 0:00 0 -
1701Rule Uruguay 1959 only - May 24 0:00 1:00 S
1786Rule Uruguay 1959 only - May 24 0:00 0:30 -
1702Rule Uruguay 1959 only - Nov 15 0:00 0 -
1787Rule Uruguay 1959 only - Nov 15 0:00 0 -
1703Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1788Rule Uruguay 1960 only - Jan 17 0:00 1:00 -
1704Rule Uruguay 1960 only - Mar 6 0:00 0 -
1789Rule Uruguay 1960 only - Mar 6 0:00 0 -
1705Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1790Rule Uruguay 1965 only - Apr 4 0:00 1:00 -
1706Rule Uruguay 1965 only - Sep 26 0:00 0 -
1791Rule Uruguay 1965 only - Sep 26 0:00 0 -
1707Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1708Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1709Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1710Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1711Rule Uruguay 1972 only - Aug 15 0:00 0 -
1712Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1713Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1714Rule Uruguay 1976 only - Oct 1 0:00 0 -
1715Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1716Rule Uruguay 1978 only - Apr 1 0:00 0 -
1717Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1718Rule Uruguay 1980 only - May 1 0:00 0 -
1719Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1720Rule Uruguay 1988 only - Mar 14 0:00 0 -
1721Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1722Rule Uruguay 1989 only - Mar 12 0:00 0 -
1723Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1724# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1725# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1726Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1727Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1728Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1792# From Tim Parenti (2018-02-15):
1793# Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the
1794# day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00.
1795# http://www.impo.com.uy/diariooficial/1968/05/30/5
1796Rule Uruguay 1968 only - May 27 0:00 0:30 -
1797Rule Uruguay 1968 only - Dec 1 0:00 0 -
1798# From Tim Parenti (2018-02-15):
1799# Decreto 188/970 of 1970-04-23 instituted restrictions on electricity
1800# consumption "as a consequence of the current rainfall regime in the country".
1801# Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00.
1802# http://www.impo.com.uy/diariooficial/1970/04/29/4
1803Rule Uruguay 1970 only - Apr 25 0:00 1:00 -
1804Rule Uruguay 1970 only - Jun 14 0:00 0 -
1805Rule Uruguay 1972 only - Apr 23 0:00 1:00 -
1806Rule Uruguay 1972 only - Jul 16 0:00 0 -
1807# From Tim Parenti (2018-02-15):
1808# Decreto 29/974 of 1974-01-11, citing "the international rise in the price of
1809# oil", advanced clocks by 90 minutes (to UT-01:30). Decreto 163/974 of
1810# 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30
1811# minutes followed in Decreto 679/974 of 1974-08-29.
1812# http://www.impo.com.uy/diariooficial/1974/01/22/11
1813# http://www.impo.com.uy/diariooficial/1974/03/14/3
1814# http://www.impo.com.uy/diariooficial/1974/09/04/6
1815Rule Uruguay 1974 only - Jan 13 0:00 1:30 -
1816Rule Uruguay 1974 only - Mar 10 0:00 0:30 -
1817Rule Uruguay 1974 only - Sep 1 0:00 0 -
1818Rule Uruguay 1974 only - Dec 22 0:00 1:00 -
1819Rule Uruguay 1975 only - Mar 30 0:00 0 -
1820Rule Uruguay 1976 only - Dec 19 0:00 1:00 -
1821Rule Uruguay 1977 only - Mar 6 0:00 0 -
1822Rule Uruguay 1977 only - Dec 4 0:00 1:00 -
1823Rule Uruguay 1978 1979 - Mar Sun>=1 0:00 0 -
1824Rule Uruguay 1978 only - Dec 17 0:00 1:00 -
1825Rule Uruguay 1979 only - Apr 29 0:00 1:00 -
1826Rule Uruguay 1980 only - Mar 16 0:00 0 -
1827# From Tim Parenti (2018-02-15):
1828# Decreto 725/987 of 1987-12-04 cited "better use of national tourist
1829# attractions" to advance clocks one hour from Monday 1987-12-14 00:00.
1830# http://www.impo.com.uy/diariooficial/1988/01/25/1
1831Rule Uruguay 1987 only - Dec 14 0:00 1:00 -
1832Rule Uruguay 1988 only - Feb 28 0:00 0 -
1833Rule Uruguay 1988 only - Dec 11 0:00 1:00 -
1834Rule Uruguay 1989 only - Mar 5 0:00 0 -
1835Rule Uruguay 1989 only - Oct 29 0:00 1:00 -
1836Rule Uruguay 1990 only - Feb 25 0:00 0 -
1837# From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04):
1838# IATA agrees as below for 1990-10 through 1993-02. Per Almanaque 2018, the
1839# 1992/1993 season appears to be the first in over half a century where DST
1840# both began and ended pursuant to the same decree.
1841Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 -
1842Rule Uruguay 1991 1992 - Mar Sun>=1 0:00 0 -
1843Rule Uruguay 1992 only - Oct 18 0:00 1:00 -
1729Rule Uruguay 1993 only - Feb 28 0:00 0 -
1730# From Eduardo Cota (2004-09-20):
1731# The Uruguayan government has decreed a change in the local time....
1844Rule Uruguay 1993 only - Feb 28 0:00 0 -
1845# From Eduardo Cota (2004-09-20):
1846# The Uruguayan government has decreed a change in the local time....
1732# http://www.presidencia.gub.uy/decretos/2004091502.htm
1733Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1847# From Tim Parenti (2018-02-15):
1848# Decreto 328/004 of 2004-09-15.
1849# http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1
1850Rule Uruguay 2004 only - Sep 19 0:00 1:00 -
1734# From Steffen Thorsen (2005-03-11):
1735# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1736# save energy ... it was postponed two weeks....
1851# From Steffen Thorsen (2005-03-11):
1852# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1853# save energy ... it was postponed two weeks....
1737# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1854# From Tim Parenti (2018-02-15):
1855# This 2005 postponement is not in Almanaque 2018. Go with the contemporaneous
1856# reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending
1857# Decreto 328/004:
1858# http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1
1859# The original decree specified a transition of 2005-03-12 24:00, but the new
1860# one specified 2005-03-27 02:00.
1738Rule Uruguay 2005 only - Mar 27 2:00 0 -
1739# From Eduardo Cota (2005-09-27):
1861Rule Uruguay 2005 only - Mar 27 2:00 0 -
1862# From Eduardo Cota (2005-09-27):
1740# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1741# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1742# 02:00 local time, official time in Uruguay will be at GMT -2.
1743Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1744Rule Uruguay 2006 only - Mar 12 2:00 0 -
1745# From Jesper Nørgaard Welen (2006-09-06):
1746# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1747#
1863# ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time,
1864# official time in Uruguay will be at GMT -2.
1865# From Tim Parenti (2018-02-15):
1866# Decreto 318/005 of 2005-09-19.
1867# http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1
1868Rule Uruguay 2005 only - Oct 9 2:00 1:00 -
1869Rule Uruguay 2006 2015 - Mar Sun>=8 2:00 0 -
1870# From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06):
1871# Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday
1872# of October at 02:00 through the second Sunday of March at 02:00. Almanaque
1873# 2018 appears to have a few typoed dates through this period; ignore them.
1874# http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1
1875Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 -
1748# From Steffen Thorsen (2015-06-30):
1749# ... it looks like they will not be using DST the coming summer:
1750# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
1751# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/
1752# From Paul Eggert (2015-06-30):
1753# Apparently restaurateurs complained that DST caused people to go to the beach
1754# instead of out to dinner.
1755# From Pablo Camargo (2015-07-13):
1756# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
1876# From Steffen Thorsen (2015-06-30):
1877# ... it looks like they will not be using DST the coming summer:
1878# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
1879# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/
1880# From Paul Eggert (2015-06-30):
1881# Apparently restaurateurs complained that DST caused people to go to the beach
1882# instead of out to dinner.
1883# From Pablo Camargo (2015-07-13):
1884# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
1757# [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04]
1758Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 S
1759Rule Uruguay 2007 2015 - Mar Sun>=8 2:00 0 -
1885# From Tim Parenti (2018-02-15):
1886# Decreto 178/015 of 2015-06-29; repeals Decreto 311/006.
1760
1761# This Zone can be simplified once we assume zic %z.
1887
1888# This Zone can be simplified once we assume zic %z.
1762Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1763 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1889Zone America/Montevideo -3:44:51 - LMT 1908 Jun 10
1890 -3:44:51 - MMT 1920 May 1 # Montevideo MT
1891 -4:00 - -04 1923 Oct 1
1764 -3:30 Uruguay -0330/-03 1942 Dec 14
1892 -3:30 Uruguay -0330/-03 1942 Dec 14
1893 -3:00 Uruguay -03/-0230 1960
1765 -3:00 Uruguay -03/-02 1968
1894 -3:00 Uruguay -03/-02 1968
1766 -3:00 Uruguay -03/-0230 1971
1895 -3:00 Uruguay -03/-0230 1970
1767 -3:00 Uruguay -03/-02 1974
1896 -3:00 Uruguay -03/-02 1974
1897 -3:00 Uruguay -03/-0130 1974 Mar 10
1768 -3:00 Uruguay -03/-0230 1974 Dec 22
1769 -3:00 Uruguay -03/-02
1770
1771# Venezuela
1772#
1773# From Paul Eggert (2015-07-28):
1774# For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533
1775# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf

--- 31 unchanged lines hidden --- 		1898 -3:00 Uruguay -03/-0230 1974 Dec 22
1899 -3:00 Uruguay -03/-02
1900
1901# Venezuela
1902#
1903# From Paul Eggert (2015-07-28):
1904# For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533
1905# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf

--- 31 unchanged lines hidden ---