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make/data/tzdata/etcetera
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*** 29,38 ****
--- 29,45 ----
# to a time zone that was right for their area. These days, the
# 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.
+ # Starting with POSIX 1003.1-2001, the entries below are all
+ # unnecessary as settings for the TZ environment variable. E.g.,
+ # instead of TZ='Etc/GMT+4' one can use the POSIX setting TZ='<-04>+4'.
+ #
+ # Do not use a POSIX TZ setting like TZ='GMT+4', which is four hours
+ # behind GMT but uses the completely misleading abbreviation "GMT".
+
Zone Etc/GMT 0 - GMT
Zone Etc/UTC 0 - UTC
Zone Etc/UCT 0 - UCT
# The following link uses older naming conventions,
*** 47,103 ****
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 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 UT
# (i.e. west of Greenwich) even though many people would expect it to
# mean 4 hours ahead of UT (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
! Zone Etc/GMT-13 13 - GMT-13
! Zone Etc/GMT-12 12 - GMT-12
! Zone Etc/GMT-11 11 - GMT-11
! Zone Etc/GMT-10 10 - GMT-10
! Zone Etc/GMT-9 9 - GMT-9
! Zone Etc/GMT-8 8 - GMT-8
! Zone Etc/GMT-7 7 - GMT-7
! Zone Etc/GMT-6 6 - GMT-6
! Zone Etc/GMT-5 5 - GMT-5
! Zone Etc/GMT-4 4 - GMT-4
! Zone Etc/GMT-3 3 - GMT-3
! Zone Etc/GMT-2 2 - GMT-2
! Zone Etc/GMT-1 1 - GMT-1
! Zone Etc/GMT+1 -1 - GMT+1
! Zone Etc/GMT+2 -2 - GMT+2
! Zone Etc/GMT+3 -3 - GMT+3
! Zone Etc/GMT+4 -4 - GMT+4
! Zone Etc/GMT+5 -5 - GMT+5
! Zone Etc/GMT+6 -6 - GMT+6
! Zone Etc/GMT+7 -7 - GMT+7
! Zone Etc/GMT+8 -8 - GMT+8
! Zone Etc/GMT+9 -9 - GMT+9
! Zone Etc/GMT+10 -10 - GMT+10
! Zone Etc/GMT+11 -11 - GMT+11
! Zone Etc/GMT+12 -12 - GMT+12
--- 54,101 ----
Link Etc/GMT Etc/Greenwich
Link Etc/GMT Etc/GMT-0
Link Etc/GMT Etc/GMT+0
Link Etc/GMT Etc/GMT0
! # Be consistent with POSIX TZ settings in the Zone names,
# 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 "-04" and corresponds to 4 hours behind UT
# (i.e. west of Greenwich) even though many people would expect it to
# mean 4 hours ahead of UT (i.e. east of Greenwich).
# 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.
+ # Also, the time zone abbreviations are now compatible with %z.
! Zone Etc/GMT-14 14 - +14
! Zone Etc/GMT-13 13 - +13
! Zone Etc/GMT-12 12 - +12
! Zone Etc/GMT-11 11 - +11
! Zone Etc/GMT-10 10 - +10
! Zone Etc/GMT-9 9 - +09
! Zone Etc/GMT-8 8 - +08
! Zone Etc/GMT-7 7 - +07
! Zone Etc/GMT-6 6 - +06
! Zone Etc/GMT-5 5 - +05
! Zone Etc/GMT-4 4 - +04
! Zone Etc/GMT-3 3 - +03
! Zone Etc/GMT-2 2 - +02
! Zone Etc/GMT-1 1 - +01
! Zone Etc/GMT+1 -1 - -01
! Zone Etc/GMT+2 -2 - -02
! Zone Etc/GMT+3 -3 - -03
! Zone Etc/GMT+4 -4 - -04
! Zone Etc/GMT+5 -5 - -05
! Zone Etc/GMT+6 -6 - -06
! Zone Etc/GMT+7 -7 - -07
! Zone Etc/GMT+8 -8 - -08
! Zone Etc/GMT+9 -9 - -09
! Zone Etc/GMT+10 -10 - -10
! Zone Etc/GMT+11 -11 - -11
! Zone Etc/GMT+12 -12 - -12
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