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Diffstat (limited to 'share/zoneinfo/australasia')
| -rw-r--r-- | share/zoneinfo/australasia | 121 |
1 files changed, 117 insertions, 4 deletions
diff --git a/share/zoneinfo/australasia b/share/zoneinfo/australasia index fe01a3e15c9b..c30ea37503b1 100644 --- a/share/zoneinfo/australasia +++ b/share/zoneinfo/australasia @@ -1,4 +1,4 @@ -# @(#)australasia 7.64 +# @(#)australasia 7.65 # This file also includes Pacific islands. # Notes are at the end of this file @@ -7,6 +7,8 @@ # Australia +# Please see the notes below for the controversy about "EST" versus "AEST" etc. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Aus 1917 only - Jan 1 0:01 1:00 - Rule Aus 1917 only - Mar 25 2:00 0 - @@ -359,7 +361,7 @@ Zone Pacific/Palau 8:57:56 - LMT 1901 # Koror # Papua New Guinea # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Port_Moresby 9:48:40 - LMT 1880 - 9:48:40 - PMMT 1895 # Port Moresby Mean Time + 9:48:32 - PMMT 1895 # Port Moresby Mean Time 10:00 - PGT # Papua New Guinea Time # Pitcairn @@ -399,6 +401,8 @@ Rule Tonga 1999 only - Oct 7 2:00s 1:00 S Rule Tonga 2000 only - Mar 19 2:00s 0 - Rule Tonga 2000 only - Nov 4 2:00s 1:00 S Rule Tonga 2001 only - Jan 27 2:00s 0 - +Rule Tonga 2001 only - Nov 25 2:00s 1:00 S +Rule Tonga 2002 only - Mar 3 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Tongatapu 12:19:20 - LMT 1901 12:20 - TOT 1941 # Tonga Time @@ -473,7 +477,7 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # Thomas G. Shanks, The International Atlas (5th edition), # San Diego: ACS Publications, Inc. (1999). # -# Gwillim Law <Gwil_Law@bridge-point.com> writes that a good source +# Gwillim Law writes that a good source # for recent time zone data is the International Air Transport # Association's Standard Schedules Information Manual (IATA SSIM), # published semiannually. Law sent in several helpful summaries @@ -535,12 +539,93 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # prefixed by the word `Australian' when referring to local times; # time announcements on that service, naturally enough, are made in UTC. -# From Arthur David Olson (March 8 1992): +# From Arthur David Olson (1992-03-08): # Given the above, what's chosen for year-round use is: # CST for any place operating at a GMTOFF of 9:30 # WST for any place operating at a GMTOFF of 8:00 # EST for any place operating at a GMTOFF of 10:00 +# From Paul Eggert (2001-04-05), summarizing a long discussion about "EST" +# versus "AEST" etc.: +# +# I see the following points of dispute: +# +# * How important are unique time zone abbreviations? +# +# Here I tend to agree with the point (most recently made by Chris +# Newman) that unique abbreviations should not be essential for proper +# operation of software. We have other instances of ambiguity +# (e.g. "IST" denoting both "Israel Standard Time" and "Indian +# Standard Time"), and they are not likely to go away any time soon. +# In the old days, some software mistakenly relied on unique +# abbreviations, but this is becoming less true with time, and I don't +# think it's that important to cater to such software these days. +# +# On the other hand, there is another motivation for unambiguous +# abbreviations: it cuts down on human confusion. This is +# particularly true for Australia, where "EST" can mean one thing for +# time T and a different thing for time T plus 1 second. +# +# * Does the relevant legislation indicate which abbreviations should be used? +# +# Here I tend to think that things are a mess, just as they are in +# many other countries. We Americans are currently disagreeing about +# which abbreviation to use for the newly legislated Chamorro Standard +# Time, for example. +# +# Personally, I would prefer to use common practice; I would like to +# refer to legislation only for examples of common practice, or as a +# tiebreaker. +# +# * Do Australians more often use "Eastern Daylight Time" or "Eastern +# Summer Time"? Do they typically prefix the time zone names with +# the word "Australian"? +# +# My own impression is that both "Daylight Time" and "Summer Time" are +# common and are widely understood, but that "Summer Time" is more +# popular; and that the leading "A" is also common but is omitted more +# often than not. I just used AltaVista advanced search and got the +# following count of page hits: +# +# 1,103 "Eastern Summer Time" AND domain:au +# 971 "Australian Eastern Summer Time" AND domain:au +# 613 "Eastern Daylight Time" AND domain:au +# 127 "Australian Eastern Daylight Time" AND domain:au +# +# Here "Summer" seems quite a bit more popular than "Daylight", +# particularly when we know the time zone is Australian and not US, +# say. The "Australian" prefix seems to be popular for Eastern Summer +# Time, but unpopular for Eastern Daylight Time. +# +# For abbreviations, tools like AltaVista are less useful because of +# ambiguity. Many hits are not really time zones, unfortunately, and +# many hits denote US time zones and not Australian ones. But here +# are the hit counts anyway: +# +# 161,304 "EST" and domain:au +# 25,156 "EDT" and domain:au +# 18,263 "AEST" and domain:au +# 10,416 "AEDT" and domain:au +# +# 14,538 "CST" and domain:au +# 5,728 "CDT" and domain:au +# 176 "ACST" and domain:au +# 29 "ACDT" and domain:au +# +# 7,539 "WST" and domain:au +# 68 "AWST" and domain:au +# +# This data suggest that Australians tend to omit the "A" prefix in +# practice. The situation for "ST" versus "DT" is less clear, given +# the ambiguities involved. +# +# * How do Australians feel about the abbreviations in the tz database? +# +# If you just count Australians on this list, I count 2 in favor and 3 +# against. One of the "against" votes (David Keegel) counseled delay, +# saying that both AEST/AEDT and EST/EST are widely used and +# understood in Australia. + # From Paul Eggert (1995-12-19): # Shanks reports 2:00 for all autumn changes in Australia and New Zealand. # Mark Prior <mrp@itd.adelaide.edu.au> writes that his newspaper @@ -756,6 +841,28 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # # The state of VICTORIA.. [ Courtesy of Vic. Dept of Premier + Cabinet ] # # [ Nov 1990 ] +# From Scott Harrington (2001-08-29): +# On KQED's "City Arts and Lectures" program last night I heard an +# interesting story about daylight savings time. Dr. John Heilbron was +# discussing his book "The Sun in the Church: Cathedrals as Solar +# Observatories"[1], and in particular the Shrine of Remembrance[2] located +# in Melbourne, Australia. +# +# Apparently the shrine's main purpose is a beam of sunlight which +# illuminates a special spot on the floor at the 11th hour of the 11th day +# of the 11th month (Remembrance Day) every year in memory of Australia's +# fallen WWI soldiers. And if you go there on Nov. 11, at 11am local time, +# you will indeed see the sunbeam illuminate the special spot at the +# expected time. +# +# However, that is only because of some special mirror contraption that had +# to be employed, since due to daylight savings time, the true solar time of +# the remembrance moment occurs one hour later (or earlier?). Perhaps +# someone with more information on this jury-rig can tell us more. +# +# [1] http://www.hup.harvard.edu/catalog/HEISUN.html +# [2] http://www.shrine.org.au + # New South Wales # From Arthur David Olson: @@ -1120,6 +1227,12 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # From Rives McDow (2000-12-01): # Tonga is observing DST as of 2000-11-04 and will stop on 2001-01-27. +# From Rives McDow (2001-07-17): +# The Kingdom of Tonga will move to DST at 0200 local time on Sunday, +# November 25, 2001 and revert back to standard time at 0300 local +# time on Sunday, March 3, 2002. + + ############################################################################### # The International Date Line |