pike.git / lib / modules / Calendar.pmod / tzdata / etcetera

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pike.git/lib/modules/Calendar.pmod/tzdata/etcetera:1: - # @(#)etcetera 7.10 + # <pre> + # This file is in the public domain, so clarified as of + # 2009-05-17 by Arthur David Olson.      # These entries are mostly present for historical reasons, so that   # people in areas not otherwise covered by the tz files could "zic -l"   # to a time zone that was right for their area. These days, the - # tz files cover almost all the inhabited world, so there's little - # need now for the entries that are not on UTC. + # tz files cover almost all the inhabited world, and the only practical + # need now for the entries that are not on UTC are for ships at sea + # that cannot use POSIX TZ settings.      Zone Etc/GMT 0 - GMT   Zone Etc/UTC 0 - UTC   Zone Etc/UCT 0 - UCT      # The following link uses older naming conventions,   # but it belongs here, not in the file `backward',   # as functions like gmtime load the "GMT" file to handle leap seconds properly.   # We want this to work even on installations that omit the other older names.   Link Etc/GMT GMT      Link Etc/UTC Etc/Universal   Link Etc/UTC Etc/Zulu      Link Etc/GMT Etc/Greenwich   Link Etc/GMT Etc/GMT-0   Link Etc/GMT Etc/GMT+0   Link Etc/GMT Etc/GMT0    - # We use POSIX-style signedness in the names and output, - # internal-style signedness in the specifications. - # For example, TZ=Etc/GMT+4 corresponds to 4 hours _behind_ UTC; - # it is equivalent to TZ=GMT+4, which is implemented directly as per POSIX. + # We use POSIX-style signs in the Zone names and the output abbreviations, + # even though this is the opposite of what many people expect. + # POSIX has positive signs west of Greenwich, but many people expect + # positive signs east of Greenwich. For example, TZ='Etc/GMT+4' uses + # the abbreviation "GMT+4" and corresponds to 4 hours behind UTC + # (i.e. west of Greenwich) even though many people would expect it to + # mean 4 hours ahead of UTC (i.e. east of Greenwich). + # + # In the draft 5 of POSIX 1003.1-200x, the angle bracket notation allows for + # TZ='<GMT-4>+4'; if you want time zone abbreviations conforming to + # ISO 8601 you can use TZ='<-0400>+4'. Thus the commonly-expected + # offset is kept within the angle bracket (and is used for display) + # while the POSIX sign is kept outside the angle bracket (and is used + # for calculation). + # + # Do not use a TZ setting like TZ='GMT+4', which is four hours behind + # GMT but uses the completely misleading abbreviation "GMT".      # Earlier incarnations of this package were not POSIX-compliant,   # and had lines such as   # Zone GMT-12 -12 - GMT-1200   # We did not want things to change quietly if someone accustomed to the old   # way does a   # zic -l GMT-12   # so we moved the names into the Etc subdirectory.      Zone Etc/GMT-14 14 - GMT-14 # 14 hours ahead of GMT