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Annotation of 43BSDReno/share/zoneinfo/datfiles/southamerica, revision 1.1

1.1     ! root        1: # @(#)southamerica     4.3
        !             2: 
        !             3: # From Guy Harris:
        !             4: # From Official Airline Guide - Worldwide Edition (1987).  Countries not
        !             5: # listed here do not observe DST, according to the OAG.  Time zone names
        !             6: # are pure inventions, and none are supplied for countries not observing
        !             7: # DST; updates from natives would be appreciated.  The times that DST
        !             8: # starts and ends are based on the assumption that they switch a 2AM just
        !             9: # as everybody else does.
        !            10: 
        !            11: ###############################################################################
        !            12: 
        !            13: # Brazil
        !            14: 
        !            15: # From Guy Harris:
        !            16: # The OAG lists October 25, 1987 and February 12, 1988 as the starting and
        !            17: # ending dates, giving them as "estimated date(s) based on previous year".  We
        !            18: # infer a rule here from one example, always a dangerous practice....  Yes,
        !            19: # they really do switch on Saturday, according to the OAG.
        !            20: # "Brazil/Acre" is for the Territory of Acre; "Brazil/DeNoronha" is for
        !            21: # Fernando De Noronha.
        !            22: 
        !            23: # From Bob Devine (January 28, 1988):
        !            24: # The only information I found is that there was no DST up to 1985.
        !            25: # But there was some before 1952!
        !            26: 
        !            27: # From U. S. Naval Observatory (January 16, 1989):
        !            28: # BRAZIL     WEST     5 H  BEHIND UTC    TERRITORY OF ACRE
        !            29: # BRAZIL     WEST     4 H  BEHIND UTC    ACRE OCT 23, '88-FEB 11,
        !            30: # BRAZIL                                 '89 (ESTIMATED)
        !            31: # BRAZIL     CENTRAL  4 H  BEHIND UTC    MANAUS
        !            32: # BRAZIL     CENTRAL  3 H  BEHIND UTC    MANAUS OCT 23, '88-FEB 11,
        !            33: # BRAZIL     CENTRAL                     '89 (ESTIMATED)
        !            34: # BRAZIL     EAST     3 H  BEHIND UTC    COASTAL STATES, RIO, SAO
        !            35: # BRAZIL     EAST                        PAULO, BRASILIA
        !            36: # BRAZIL     EAST     2 H  BEHIND UTC    COASTAL STATES, RIO, SAO
        !            37: # BRAZIL                                 PAULO, BRASILIA OCT 23,
        !            38: # BRAZIL                                 '88-FEB 11, '89
        !            39: # BRAZIL                                 (ESTIMATED)
        !            40: # BRAZIL              2 H  BEHIND UTC    ATLANTIC ISLANDS, FERNANDO
        !            41: # BRAZIL                                 DE NORONHA
        !            42: # BRAZIL              1 H  BEHIND UTC    OCT 23, '88-FEB 11, '89
        !            43: # BRAZIL                                 (ESTIMATED)
        !            44: # BRAZIL              3 H  BEHIND UTC    FOR MOST MAJOR AIRPORTS.
        !            45: 
        !            46: # Rule NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
        !            47: Rule   Brazil  1987    max     -       Feb     Sat<=14 2:00    0       S
        !            48: Rule   Brazil  1987    max     -       Oct     Sat<=28 2:00    1:00    D
        !            49: 
        !            50: # Zone NAME                    GMTOFF  RULES/SAVE      FORMAT  [UNTIL]
        !            51: Zone   Brazil/East             -3:00   Brazil          E%sT
        !            52: Zone   Brazil/West             -4:00   Brazil          W%sT
        !            53: Zone   Brazil/Acre             -5:00   Brazil          A%sT
        !            54: Zone   Brazil/DeNoronha        -2:00   Brazil          F%sT
        !            55: 
        !            56: ###############################################################################
        !            57: 
        !            58: # Chile
        !            59: 
        !            60: # From Guy Harris:
        !            61: # The OAG lists October 11, 1987 and March 12, 1988 as the starting and
        !            62: # ending dates, giving them as "estimated date(s) based on previous year."
        !            63: 
        !            64: # From Bob Devine (January 28, 1988):
        !            65: # Chile has had 2nd Sunday in October to 2nd Sunday in March DST since 1977.
        !            66: # Switch is at midnight. OAG is right.
        !            67: 
        !            68: # Rule NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
        !            69: Rule   Chile   1977    max     -       Oct     Sun>=8  0:00    1:00    D
        !            70: Rule   Chile   1978    max     -       Mar     Sun>=8  0:00    0       S
        !            71: 
        !            72: # Zone NAME                    GMTOFF  RULES/SAVE      FORMAT  [UNTIL]
        !            73: Zone   Chile/Continental       -4:00   Chile           C%sT
        !            74: Zone   Chile/EasterIsland      -6:00   Chile           E%sT
        !            75: 
        !            76: ###############################################################################
        !            77: 
        !            78: # Paraguay
        !            79: 
        !            80: # From Bob Devine (January 28, 1988):
        !            81: # Paraguay: First day in October to last in March.  Midnight switch??
        !            82: # Since 1980.
        !            83: 
        !            84: # From U. S. Naval Observatory (January 19, 1989):
        !            85: # PARAGUAY            4 H  BEHIND UTC
        !            86: # PARAGUAY            3 H  BEHIND UTC    OCT 1, '88-MAR 31, '89
        !            87: 
        !            88: # From Arthur David Olson (January 21, 1989):
        !            89: # Still don't know time of day when switch occurs.  Punt.
        !            90: 
        !            91: ###############################################################################
        !            92: 
        !            93: # Argentina
        !            94: 
        !            95: # From Bob Devine (January 28, 1988):
        !            96: # Argentina: first Sunday in October to first Sunday in April since 1976.
        !            97: # Double Summer time from 1969 to 1974.  Switches at midnight.
        !            98: 
        !            99: # From U. S. Naval Observatory (January 19, 19889):
        !           100: # ARGENTINA           3 H BEHIND   UTC
        !           101: 
        !           102: # From Arthur David Olson (January 21, 1989):
        !           103: # OAG, USNO and Bob have different data.  Punt.

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