1# @(#)southamerica 7.15 |
2 3# This data is by no means authoritative; if you think you know better, 4# go ahead and edit the file (and please send any changes to 5# tz@elsie.nci.nih.gov for general use in the future). 6 |
7# From Paul Eggert <eggert@twinsun.com> (1996-11-22): |
8# A good source for time zone historical data outside the U.S. is 9# Thomas G. Shanks, The International Atlas (3rd edition), 10# San Diego: ACS Publications, Inc. (1991). |
11# |
12# Gwillim Law <LAW@encmail.encompass.com> writes that a good source 13# for recent time zone data is the International Air Transport 14# Association's Standard Schedules Information Manual (IATA SSIM), 15# published semiannually. Law sent in several helpful summaries 16# of the IATA's data after 1990. 17# 18# Except where otherwise noted, Shanks is the source for entries through 1990, 19# and IATA SSIM is the source for entries after 1990. 20# |
21# The following abbreviations are used in this file. 22# Corrections are welcome! 23# std dst 24# LMT Local Mean Time 25# -2:00 FST FDT Fernando de Noronha 26# -3:00 EST EDT Eastern Brazil 27# -4:00 WST WDT Western Brazil 28# -4:00 AST ADT Atlantic --- 77 unchanged lines hidden (view full) --- 106Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 107# 108# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 109# From this moment on, the law that mandated the daylight saving 110# time corrections was derogated and no more modifications 111# to the time zones (for daylight saving) are now made. 112# 113# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
114# 115# Buenos Aires (BA), Distrito Federal (DF), Santa Cruz (SC), 116# Tierra del Fuego (TF) & Antartida e Islas |
117Zone America/Buenos_Aires -3:53:48 - LMT 1894 Nov 118 -4:16:44 - CMT 1920 May # Cordoba Mean Time 119 -4:00 - ART 1930 Dec 120 -4:00 Arg AR%sT 1969 Oct 5 121 -3:00 Arg AR%sT |
122# 123# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 124# Formosa (FM), La Pampa (LP), Chubut (CH) 125Zone America/Rosario -4:02:40 - LMT 1894 Nov 126 -4:16:44 - CMT 1920 May 127 -4:00 - ART 1930 Dec 128 -4:00 Arg AR%sT 1969 Oct 5 129 -3:00 Arg AR%sT 1991 Jul 130 -3:00 - ART 131# 132# Cordoba (CB), Santiago del Estero (SE), Salta (SA), Tucuman (TM), La Rioja (LR), San Juan (SJ), San Luis (SL), 133# Neuquen (NQ), Rio Negro (RN) 134Zone America/Cordoba -4:16:44 - LMT 1894 Nov 135 -4:16:44 - CMT 1920 May 136 -4:00 - ART 1930 Dec 137 -4:00 Arg AR%sT 1969 Oct 5 138 -3:00 Arg AR%sT 1990 Jul 139 -3:00 - ART 140# 141# Jujuy (JY) 142Zone America/Jujuy -4:21:12 - LMT 1894 Nov 143 -4:16:44 - CMT 1920 May 144 -4:00 - ART 1930 Dec 145 -4:00 Arg AR%sT 1969 Oct 5 146 -3:00 Arg AR%sT 1991 Mar 3 147 -4:00 - WART 1991 Oct 6 148 -4:00 1:00 WARST 1992 Mar 15 149 -4:00 - WART 1992 Oct 18 150 -3:00 - ART 151# 152# Catamarca (CT) 153Zone America/Catamarca -4:23:08 - LMT 1894 Nov 154 -4:16:44 - CMT 1920 May 155 -4:00 - ART 1930 Dec 156 -4:00 Arg AR%sT 1969 Oct 5 157 -3:00 Arg AR%sT 1990 Jul 158 -3:00 - ART 1991 Jul 159 -3:00 Arg AR%sT 1992 Jul 160 -3:00 - ART 161# 162# Mendoza (MZ) 163Zone America/Mendoza -4:35:16 - LMT 1894 Nov 164 -4:16:44 - CMT 1920 May 165 -4:00 - ART 1930 Dec 166 -4:00 Arg AR%sT 1969 Oct 5 167 -3:00 Arg AR%sT 1991 Mar 3 168 -4:00 - WART 1991 Oct 15 169 -4:00 1:00 WARST 1992 Mar 1 170 -4:00 - WART 1992 Oct 18 171 -3:00 - ART |
172 173# Aruba 174# Zone NAME GMTOFF RULES FORMAT [UNTIL] 175Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 176 -4:30 - ANT 1965 # Netherlands Antilles Time 177 -4:00 - AST 178 179# Bolivia --- 8 unchanged lines hidden (view full) --- 188# From Guy Harris: 189# The OAG lists 1987-10-25 and 1988-02-12 as the starting and 190# ending dates, giving them as "estimated date(s) based on previous year". We 191# infer a rule here from one example, always a dangerous practice.... Yes, 192# they really do switch on Saturday, according to the OAG. 193# "[America/Porto_Acre]" is for the Territory of Acre; 194# "[America/Noronha]" is for Fernando De Noronha. 195 |
196# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 197# The mayor of Rio recently attempted to change the time zone rules 198# just in his city, in order to leave more summer time for the tourist trade. 199# The rule change lasted only part of the day; 200# the federal government refused to follow the city's rules, and business 201# was in a chaos, so the mayor backed down that afternoon. |
202 |
203# From IATA SSIM (1996-02): 204# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 205# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 206# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 207# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 208# [The last three states are new to this issue of the IATA SSIM.] 209 210# From Gwillim Law (1996-10-07): 211# Geography, history (Tocantins was part of Goias until 1989), and other 212# sources of time zone information lead me to believe that AL, SE, and TO were 213# always in BR1, and so the only change was whether or not they observed DST.... 214# The earliest issue of the SSIM I have is 2/91. Each issue from then until 215# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 216# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 217# (UTC-4).... The other two time zones given for Brazil are BR3, which is 218# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 219# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 220# become part of the state of Pernambuco). The boundary between BR1 and BR2 221# has never been clearly stated. They've simply been called East and West. 222# However, some conclusions can be drawn from another IATA manual: the Airline 223# Coding Directory, which lists close to 400 airports in Brazil. For each 224# airport it gives a time zone which is coded to the SSIM. From that 225# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 226# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 227# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 228 229# From Paul Eggert (1996-11-22): 230# Let's make the following assumptions: 231# 232# * All data in Shanks are correct through 1990. In particular, 233# Shanks was right when he said Acre stopped observing DST in mid-1988. 234# * Areas where Shanks reports DST up to 1990, but the IATA reports no DST 235# in 1995, stopped observing DST in mid-1990. 236# 237# Under these assumptions Brazil needs 7 entries to cover all the distinct 238# time zone histories since 1970: 239# 240# Noronha (UTC-2), Fortaleza (UTC-3), and Manaus (UTC-4) stopped observing DST 241# in mid-1990. 242# Maceio (UTC-3) stopped observing DST in mid-1990, but started again mid-1995. 243# Sao Paulo (UTC-3) and Cuiaba (UTC-4) always observed DST. 244# Porto Acre (UTC-5) stopped observing DST in mid-1988. 245 |
246# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 247Rule Brazil 1931 only - Oct 3 11:00 1:00 D 248Rule Brazil 1932 1933 - Apr 1 0:00 0 S 249Rule Brazil 1932 only - Oct 3 0:00 1:00 D 250Rule Brazil 1949 1952 - Dec 1 0:00 1:00 D 251Rule Brazil 1950 only - Apr 16 0:00 0 S 252Rule Brazil 1951 1953 - Apr 1 0:00 0 S 253Rule Brazil 1963 only - Dec 9 0:00 1:00 D --- 4 unchanged lines hidden (view full) --- 258Rule Brazil 1966 1968 - Mar 1 0:00 0 S 259Rule Brazil 1966 1967 - Nov 1 0:00 1:00 D 260Rule Brazil 1985 only - Nov 2 0:00 1:00 D 261Rule Brazil 1986 only - Mar 15 0:00 0 S 262Rule Brazil 1986 1987 - Oct Sat<=28 0:00 1:00 D 263Rule Brazil 1987 only - Feb 14 0:00 0 S 264Rule Brazil 1988 only - Feb 7 0:00 0 S 265Rule Brazil 1989 only - Jan 22 0:00 0 S |
266Rule Brazil 1988 1989 - Oct Sun>=10 0:00 1:00 D 267Rule Brazil 1990 1991 - Feb Sun>=11 0:00 0 S 268Rule Brazil 1990 1992 - Oct Sun>=20 0:00 1:00 D 269Rule Brazil 1992 only - Feb 9 0:00 0 S 270Rule Brazil 1993 max - Oct Sun>=11 0:00 1:00 D 271Rule Brazil 1993 only - Jan 31 0:00 0 S 272Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 S 273Rule Brazil 1996 max - Feb Sun>=11 0:00 0 S 274 |
275# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
276# 277# Fernando de Noronha |
278Zone America/Noronha -2:09:40 - LMT 1914 279 -2:00 - FST 1963 Dec 9 |
280 -2:00 Brazil F%sT 1990 Jul 281 -2:00 - FST 282# 283# Amapa, east Para, Maranhao, Piaui, Ceara, Rio Grande do Norte, Paraiba, 284# Pernambuco (except Fernando de Noronha) 285Zone America/Fortaleza -2:34:00 - LMT 1914 286 -3:00 - EST 1963 Dec 9 287 -3:00 Brazil E%sT 1990 Jul 288 -3:00 - EST 289# 290# Alagoas, Sergipe, Tocantins 291Zone America/Maceio -2:22:52 - LMT 1914 292 -3:00 - EST 1963 Dec 9 293 -3:00 Brazil E%sT 1990 Jul 294 -3:00 - EST 1995 Jul 295 -3:00 Brazil E%sT 296# 297# Bahia, Goias, Distrito Federal, Minas Gerais, Espirito Santo, Rio de Janeiro, 298# Sao Paulo, Parana, Santa Catarina, Rio Grande do Sul |
299Zone America/Sao_Paulo -3:06:28 - LMT 1914 300 -3:00 Brazil E%sT |
301# 302# Mato Grosso, Mato Grosso do Sul 303Zone America/Cuiaba -3:44:20 - LMT 1914 |
304 -4:00 - WST 1963 Dec 9 305 -4:00 Brazil W%sT |
306# 307# Roraima, west Para, Amazonas, Rondonia 308Zone America/Manaus -4:00:04 - LMT 1914 309 -4:00 - WST 1963 Dec 9 310 -4:00 Brazil W%sT 1990 Jul 311 -4:00 - WST 312# 313# Acre |
314# Rio_Branco is too ambiguous, since there's a Rio Branco in Uruguay too. 315Zone America/Porto_Acre -4:31:12 - LMT 1914 316 -5:00 - AST 1963 Dec 9 |
317 -5:00 Brazil A%sT 1988 Jul 318 -5:00 - AST |
319# 320# Martin Vaz and Trinidade are like America/Noronha. 321 322 323# Chile 324 325# From Eduardo Krell (1995-10-19): 326# The law says to switch to DST at midnight [24:00] on the second SATURDAY 327# of October.... The law is the same for March and October. 328 329# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 330Rule Chile 1918 only - Sep 1 0:00 1:00 S 331Rule Chile 1919 only - Jul 2 0:00 0 - 332Rule Chile 1927 1931 - Sep 1 0:00 1:00 S 333Rule Chile 1928 1932 - Apr 1 0:00 0 - 334Rule Chile 1969 max - Oct Sun>=9 0:00 1:00 S 335Rule Chile 1970 max - Mar Sun>=9 0:00 0 - |
336# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; 337# (1996-09) says 1998-03-08. Ignore these for now. |
338# Zone NAME GMTOFF RULES FORMAT [UNTIL] 339Zone America/Santiago -4:42:40 - LMT 1890 340 -4:42:40 - SMT 1910 # Santiago Mean Time 341 -5:00 Chile CL%sT 1932 Sep # Chile Time 342 -4:00 Chile CL%sT 343Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 344 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 345 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time 346 -6:00 Chile EAS%sT 347# 348# Whitman says Juan Fernandez Is are like America/Santiago. 349# San Ambrosio, San Felix 350# no information; probably like America/Santiago 351 352 353# Colombia |
354# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 355Rule CO 1992 only - May 2 0:00 1:00 S 356Rule CO 1992 only - Dec 31 0:00 0 - |
357# Zone NAME GMTOFF RULES FORMAT [UNTIL] 358Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 359 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time |
360 -5:00 CO CO%sT # Colombia Time |
361# Malpelo, Providencia, San Andres 362# no information; probably like America/Bogota 363 364# Curacao 365# Zone NAME GMTOFF RULES FORMAT [UNTIL] 366Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 367 -4:30 - ANT 1965 # Netherlands Antilles Time 368 -4:00 - AST --- 12 unchanged lines hidden (view full) --- 381Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 382Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 383Rule Falk 1939 only - Oct 1 0:00 1:00 S 384Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 385Rule Falk 1943 only - Jan 1 0:00 0 - 386Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 387Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 388Rule Falk 1984 only - Sep 16 0:00 1:00 S |
389Rule Falk 1985 1995 - Sep Sun>=9 0:00 1:00 S |
390Rule Falk 1986 max - Apr Sun>=16 0:00 0 - |
391Rule Falk 1996 max - Sep Sun>=8 0:00 1:00 S |
392# Zone NAME GMTOFF RULES FORMAT [UNTIL] 393Zone Atlantic/Stanley -3:51:24 - LMT 1890 394 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 395 -4:00 Falk FK%sT 1983 May # Falkland Is Time 396 -3:00 Falk FK%sT 1985 Sep 15 397 -4:00 Falk FK%sT 398 399# French Guiana 400# Zone NAME GMTOFF RULES FORMAT [UNTIL] 401Zone America/Cayenne -3:29:20 - LMT 1911 Jul 402 -4:00 - GFT 1967 Oct # French Guiana Time 403 -3:00 - GFT 404 405# Guyana 406# Zone NAME GMTOFF RULES FORMAT [UNTIL] 407Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 408 -3:45 - GBGT 1966 May 26 # Br Guiana Time 409 -3:45 - GYT 1975 Jul 31 # Guyana Time |
410 -3:00 - GYT 1991 411# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 412 -4:00 - GYT |
413 |
414# Paraguay 415 416# From Bob Devine (1988-01-28): 417# Paraguay: First day in October to last in March. Midnight switch?? 418# Since 1980. 419 420# From U. S. Naval Observatory (1989-01-19): 421# PARAGUAY 4 H BEHIND UTC 422# PARAGUAY 3 H BEHIND UTC OCT 1, '88-MAR 31, '89 423 424# From Shanks (1991): 425# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 426Rule Para 1975 1978 - Oct 1 0:00 1:00 S 427Rule Para 1975 1978 - Mar 1 0:00 0 - 428# Shanks says 1979 was all DST. |
429Rule Para 1980 1991 - Apr 1 0:00 0 - |
430Rule Para 1980 1988 - Oct 1 0:00 1:00 S 431Rule Para 1989 only - Oct 22 0:00 1:00 S |
432Rule Para 1990 only - Oct 1 0:00 1:00 S 433Rule Para 1991 only - Oct 6 0:00 1:00 S 434Rule Para 1992 only - Mar 1 0:00 0 - 435Rule Para 1992 only - Oct 5 0:00 1:00 S 436Rule Para 1993 only - Mar 31 0:00 0 - 437Rule Para 1993 max - Oct 1 0:00 1:00 S 438Rule Para 1994 1995 - Feb lastSun 0:00 0 - 439Rule Para 1996 max - Mar 1 0:00 0 - |
440# Zone NAME GMTOFF RULES FORMAT [UNTIL] 441Zone America/Asuncion -3:50:40 - LMT 1890 442 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 443 -4:00 - PYT 1972 Oct # Paraguay Time 444 -3:00 - PYT 1974 Apr 445 -4:00 Para PY%sT 446 447# Peru 448# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 449Rule Peru 1938 only - Jan 1 0:00 1:00 S 450Rule Peru 1938 only - Apr 1 0:00 0 - 451Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 452Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 453Rule Peru 1987 only - Jan 1 0:00 1:00 S 454Rule Peru 1987 only - Apr 1 0:00 0 - 455Rule Peru 1990 only - Jan 1 0:00 1:00 S 456Rule Peru 1990 only - Apr 1 0:00 0 - |
457Rule Peru 1993 only - Jan 1 0:00 1:00 S 458Rule Peru 1993 only - Apr 1 0:00 0 - |
459# Zone NAME GMTOFF RULES FORMAT [UNTIL] 460Zone America/Lima -5:08:12 - LMT 1890 461 -5:09 - LMT 1908 Jul 28 # Lima Mean Time 462 -5:00 Peru PE%sT # Peru Time 463 464# South Georgia 465# Zone NAME GMTOFF RULES FORMAT [UNTIL] 466Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken --- 56 unchanged lines hidden (view full) --- 523Rule Uruguay 1978 only - Apr 1 0:00 0 - 524Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 525Rule Uruguay 1980 only - May 1 0:00 0 - 526Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 527Rule Uruguay 1988 only - Mar 14 0:00 0 - 528Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 529Rule Uruguay 1989 only - Mar 12 0:00 0 - 530Rule Uruguay 1989 only - Oct 29 0:00 1:00 S |
531Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 532Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 533Rule Uruguay 1992 1993 - Oct Sun>=15 0:00 1:00 S 534Rule Uruguay 1993 only - Feb 28 0:00 0 - |
535# Zone NAME GMTOFF RULES FORMAT [UNTIL] 536Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 537 -3:44:44 - MMT 1920 May 1 # Montevideo MT 538 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 539 -3:00 Uruguay UY%sT 540 541# Venezuela 542# Zone NAME GMTOFF RULES FORMAT [UNTIL] 543Zone America/Caracas -4:27:44 - LMT 1890 544 -4:27:44 - CMT 1912 Feb 12 # Caracas Mean Time 545 -4:30 - VET 1965 # Venezuela Time 546 -4:00 - VET |