[tz] [PATCH 1/2] Follow Australian common usage and update CST/CST to CST/CDT and EST/EST to EST/EDT etc [SEC=UNCLASSIFIED]

Timothy Arceri T.Arceri at bom.gov.au
Wed Apr 10 23:50:15 UTC 2013


--- australasia     2013-02-21 07:00:40.000000000 +0000
+++ australasia_new      2013-04-10 00:39:26.000000000 +0000
@@ -13,13 +13,13 @@
# 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              -
-Rule     Aus        1942       only       -              Jan         1             2:00        1:00        -
-Rule     Aus        1942       only       -              Mar        29           2:00        0              -
-Rule     Aus        1942       only       -              Sep        27           2:00        1:00        -
-Rule     Aus        1943       1944       -              Mar        lastSun 2:00        0              -
-Rule     Aus        1943       only       -              Oct         3             2:00        1:00        -
+Rule    Aus        1917       only       -              Jan         1             0:01        1:00        D
+Rule    Aus        1917       only       -              Mar        25           2:00        0              S
+Rule    Aus        1942       only       -              Jan         1             2:00        1:00        D
+Rule    Aus        1942       only       -              Mar        29           2:00        0              S
+Rule    Aus        1942       only       -              Sep        27           2:00        1:00        D
+Rule    Aus        1943       1944       -              Mar        lastSun 2:00        0              S
+Rule    Aus        1943       only       -              Oct         3             2:00        1:00        D
# Go with Whitman and the Australian National Standards Commission, which
# says W Australia didn't use DST in 1943/1944.  Ignore Whitman's claim that
# 1944/1945 was just like 1943/1944.
@@ -28,25 +28,25 @@
# Northern Territory
Zone Australia/Darwin  8:43:20 -              LMT       1895 Feb
                                                9:00       -              CST         1899 May
-                                              9:30       Aus        CST
+                                             9:30       Aus        C%sT
# Western Australia
#
# Rule  NAME   FROM   TO          TYPE      IN           ON         AT           SAVE     LETTER/S
-Rule     AW         1974       only       -              Oct         lastSun 2:00s      1:00        -
-Rule     AW         1975       only       -              Mar        Sun>=1 2:00s      0              -
-Rule     AW         1983       only       -              Oct         lastSun 2:00s      1:00        -
-Rule     AW         1984       only       -              Mar        Sun>=1 2:00s      0              -
-Rule     AW         1991       only       -              Nov        17           2:00s      1:00        -
-Rule     AW         1992       only       -              Mar        Sun>=1 2:00s      0              -
-Rule     AW         2006       only       -              Dec        3             2:00s      1:00        -
-Rule     AW         2007       2009       -              Mar        lastSun 2:00s      0              -
-Rule     AW         2007       2008       -              Oct         lastSun 2:00s      1:00        -
+Rule    AW         1974       only       -              Oct         lastSun 2:00s      1:00        D
+Rule    AW         1975       only       -              Mar        Sun>=1 2:00s      0              S
+Rule    AW         1983       only       -              Oct         lastSun 2:00s      1:00        D
+Rule    AW         1984       only       -              Mar        Sun>=1 2:00s      0              S
+Rule    AW         1991       only       -              Nov        17           2:00s      1:00        D
+Rule    AW         1992       only       -              Mar        Sun>=1 2:00s      0              S
+Rule    AW         2006       only       -              Dec        3             2:00s      1:00        D
+Rule    AW         2007       2009       -              Mar        lastSun 2:00s      0              S
+Rule    AW         2007       2008       -              Oct         lastSun 2:00s      1:00        D
Zone Australia/Perth     7:43:24 -              LMT       1895 Dec
-                                              8:00       Aus        WST       1943 Jul
-                                              8:00       AW         WST
+                                             8:00       Aus        W%sT    1943 Jul
+                                             8:00       AW         W%sT
Zone Australia/Eucla      8:35:28 -              LMT       1895 Dec
-                                              8:45       Aus        CWST    1943 Jul
-                                              8:45       AW         CWST
+                                             8:45       Aus        CW%sT 1943 Jul
+                                             8:45       AW         CW%sT
 # Queensland
#
@@ -62,42 +62,42 @@
# so use Lindeman.
#
# Rule  NAME   FROM   TO          TYPE      IN           ON         AT           SAVE     LETTER/S
-Rule     AQ          1971       only       -              Oct         lastSun 2:00s      1:00        -
-Rule     AQ          1972       only       -              Feb        lastSun 2:00s      0              -
-Rule     AQ          1989       1991       -              Oct         lastSun 2:00s      1:00        -
-Rule     AQ          1990       1992       -              Mar        Sun>=1 2:00s      0              -
-Rule     Holiday 1992       1993       -              Oct         lastSun 2:00s      1:00        -
-Rule     Holiday 1993       1994       -              Mar        Sun>=1 2:00s      0              -
+Rule    AQ          1971       only       -              Oct         lastSun 2:00s      1:00        D
+Rule    AQ          1972       only       -              Feb        lastSun 2:00s      0              S
+Rule    AQ          1989       1991       -              Oct         lastSun 2:00s      1:00        D
+Rule    AQ          1990       1992       -              Mar        Sun>=1 2:00s      0              S
+Rule    Holiday 1992       1993       -              Oct         lastSun 2:00s      1:00        D
+Rule    Holiday 1993       1994       -              Mar        Sun>=1 2:00s      0              S
Zone Australia/Brisbane              10:12:08 -             LMT       1895
-                                              10:00     Aus        EST         1971
-                                              10:00     AQ          EST
+                                             10:00     Aus        E%sT      1971
+                                             10:00     AQ          E%sT
Zone Australia/Lindeman  9:55:56 -         LMT       1895
-                                              10:00     Aus        EST         1971
-                                              10:00     AQ          EST         1992 Jul
-                                              10:00     Holiday EST
+                                             10:00     Aus        E%sT      1971
+                                             10:00     AQ          E%sT      1992 Jul
+                                             10:00     Holiday E%sT
 # South Australia
# Rule  NAME   FROM   TO          TYPE      IN           ON         AT           SAVE     LETTER/S
-Rule     AS           1971       1985       -              Oct         lastSun 2:00s      1:00        -
-Rule     AS           1986       only       -              Oct         19           2:00s      1:00        -
-Rule     AS           1987       2007       -              Oct         lastSun 2:00s      1:00        -
-Rule     AS           1972       only       -              Feb        27           2:00s      0              -
-Rule     AS           1973       1985       -              Mar        Sun>=1 2:00s      0              -
-Rule     AS           1986       1990       -              Mar        Sun>=15              2:00s      0              -
-Rule     AS           1991       only       -              Mar        3              2:00s      0              -
-Rule     AS           1992       only       -              Mar        22           2:00s      0              -
-Rule     AS           1993       only       -              Mar        7              2:00s      0              -
-Rule     AS           1994       only       -              Mar        20           2:00s      0              -
-Rule     AS           1995       2005       -              Mar        lastSun 2:00s      0              -
-Rule     AS           2006       only       -              Apr         2              2:00s      0              -
-Rule     AS           2007       only       -              Mar        lastSun 2:00s      0              -
-Rule     AS           2008       max       -              Apr         Sun>=1 2:00s      0              -
-Rule     AS           2008       max       -              Oct         Sun>=1 2:00s      1:00        -
+Rule    AS           1971       1985       -              Oct         lastSun 2:00s      1:00        D
+Rule    AS           1986       only       -              Oct         19           2:00s      1:00        D
+Rule    AS           1987       2007       -              Oct         lastSun 2:00s      1:00        D
+Rule    AS           1972       only       -              Feb        27           2:00s      0              S
+Rule    AS           1973       1985       -              Mar        Sun>=1 2:00s      0              S
+Rule    AS           1986       1990       -              Mar        Sun>=15              2:00s      0              S
+Rule    AS           1991       only       -              Mar        3              2:00s      0              S
+Rule    AS           1992       only       -              Mar        22           2:00s      0              S
+Rule    AS           1993       only       -              Mar        7              2:00s      0              S
+Rule    AS           1994       only       -              Mar        20           2:00s      0              S
+Rule    AS           1995       2005       -              Mar        lastSun 2:00s      0              S
+Rule    AS           2006       only       -              Apr         2              2:00s      0              S
+Rule    AS           2007       only       -              Mar        lastSun 2:00s      0              S
+Rule    AS           2008       max       -              Apr         Sun>=1 2:00s      0              S
+Rule    AS           2008       max       -              Oct         Sun>=1 2:00s      1:00        D
# Zone NAME                   GMTOFF              RULES   FORMAT              [UNTIL]
Zone Australia/Adelaide              9:14:20 -               LMT       1895 Feb
                                               9:00        -              CST         1899 May
-                                              9:30        Aus        CST         1971
-                                              9:30        AS           CST
+                                             9:30        Aus        C%sT     1971
+                                             9:30        AS           C%sT
 # Tasmania
#
@@ -106,106 +106,106 @@
# says King Island didn't observe DST from WWII until late 1971.
#
# Rule  NAME   FROM   TO          TYPE      IN           ON         AT           SAVE     LETTER/S
-Rule     AT           1967       only       -              Oct         Sun>=1 2:00s      1:00        -
-Rule     AT           1968       only       -              Mar        lastSun 2:00s      0              -
-Rule     AT           1968       1985       -              Oct         lastSun 2:00s      1:00        -
-Rule     AT           1969       1971       -              Mar        Sun>=8 2:00s      0              -
-Rule     AT           1972       only       -              Feb        lastSun 2:00s      0              -
-Rule     AT           1973       1981       -              Mar        Sun>=1 2:00s      0              -
-Rule     AT           1982       1983       -              Mar        lastSun 2:00s      0              -
-Rule     AT           1984       1986       -              Mar        Sun>=1 2:00s      0              -
-Rule     AT           1986       only       -              Oct         Sun>=15              2:00s      1:00        -
-Rule     AT           1987       1990       -              Mar        Sun>=15              2:00s      0              -
-Rule     AT           1987       only       -              Oct         Sun>=22              2:00s      1:00        -
-Rule     AT           1988       1990       -              Oct         lastSun 2:00s      1:00        -
-Rule     AT           1991       1999       -              Oct         Sun>=1 2:00s      1:00        -
-Rule     AT           1991       2005       -              Mar        lastSun 2:00s      0              -
-Rule     AT           2000       only       -              Aug        lastSun 2:00s      1:00        -
-Rule     AT           2001       max       -              Oct         Sun>=1 2:00s      1:00        -
-Rule     AT           2006       only       -              Apr         Sun>=1 2:00s      0              -
-Rule     AT           2007       only       -              Mar        lastSun 2:00s      0              -
-Rule     AT           2008       max       -              Apr         Sun>=1 2:00s      0              -
+Rule    AT           1967       only       -              Oct         Sun>=1 2:00s      1:00        D
+Rule    AT           1968       only       -              Mar        lastSun 2:00s      0              S
+Rule    AT           1968       1985       -              Oct         lastSun 2:00s      1:00        D
+Rule    AT           1969       1971       -              Mar        Sun>=8 2:00s      0              S
+Rule    AT           1972       only       -              Feb        lastSun 2:00s      0              S
+Rule    AT           1973       1981       -              Mar        Sun>=1 2:00s      0              S
+Rule    AT           1982       1983       -              Mar        lastSun 2:00s      0              S
+Rule    AT           1984       1986       -              Mar        Sun>=1 2:00s      0              S
+Rule    AT           1986       only       -              Oct         Sun>=15              2:00s      1:00        D
+Rule    AT           1987       1990       -              Mar        Sun>=15              2:00s      0              S
+Rule    AT           1987       only       -              Oct         Sun>=22              2:00s      1:00        D
+Rule    AT           1988       1990       -              Oct         lastSun 2:00s      1:00        D
+Rule    AT           1991       1999       -              Oct         Sun>=1 2:00s      1:00        D
+Rule    AT           1991       2005       -              Mar        lastSun 2:00s      0              S
+Rule    AT           2000       only       -              Aug        lastSun 2:00s      1:00        D
+Rule    AT           2001       max       -              Oct         Sun>=1 2:00s      1:00        D
+Rule    AT           2006       only       -              Apr         Sun>=1 2:00s      0              S
+Rule    AT           2007       only       -              Mar        lastSun 2:00s      0              S
+Rule    AT           2008       max       -              Apr         Sun>=1 2:00s      0              S
# Zone NAME                   GMTOFF              RULES   FORMAT              [UNTIL]
Zone Australia/Hobart  9:49:16  -              LMT       1895 Sep
                                               10:00     -              EST         1916 Oct 1 2:00
-                                              10:00     1:00        EST         1917 Feb
-                                              10:00     Aus        EST         1967
-                                              10:00     AT           EST
+                                             10:00     1:00        EDT        1917 Feb
+                                             10:00     Aus        E%sT      1967
+                                             10:00     AT           E%sT
Zone Australia/Currie    9:35:28  -              LMT       1895 Sep
                                               10:00     -              EST         1916 Oct 1 2:00
-                                              10:00     1:00        EST         1917 Feb
-                                              10:00     Aus        EST         1971 Jul
-                                              10:00     AT           EST
+                                             10:00     1:00        EDT        1917 Feb
+                                             10:00     Aus        E%sT      1971 Jul
+                                             10:00     AT           E%sT
 # Victoria
# Rule  NAME   FROM   TO          TYPE      IN           ON         AT           SAVE     LETTER/S
-Rule     AV          1971       1985       -              Oct         lastSun 2:00s      1:00        -
-Rule     AV          1972       only       -              Feb        lastSun 2:00s      0              -
-Rule     AV          1973       1985       -              Mar        Sun>=1 2:00s      0              -
-Rule     AV          1986       1990       -              Mar        Sun>=15              2:00s      0              -
-Rule     AV          1986       1987       -              Oct         Sun>=15              2:00s      1:00        -
-Rule     AV          1988       1999       -              Oct         lastSun 2:00s      1:00        -
-Rule     AV          1991       1994       -              Mar        Sun>=1 2:00s      0              -
-Rule     AV          1995       2005       -              Mar        lastSun 2:00s      0              -
-Rule     AV          2000       only       -              Aug        lastSun 2:00s      1:00        -
-Rule     AV          2001       2007       -              Oct         lastSun 2:00s      1:00        -
-Rule     AV          2006       only       -              Apr         Sun>=1 2:00s      0              -
-Rule     AV          2007       only       -              Mar        lastSun 2:00s      0              -
-Rule     AV          2008       max       -              Apr         Sun>=1 2:00s      0              -
-Rule     AV          2008       max       -              Oct         Sun>=1 2:00s      1:00        -
+Rule    AV          1971       1985       -              Oct         lastSun 2:00s      1:00        D
+Rule    AV          1972       only       -              Feb        lastSun 2:00s      0              S
+Rule    AV          1973       1985       -              Mar        Sun>=1 2:00s      0              S
+Rule    AV          1986       1990       -              Mar        Sun>=15              2:00s      0              S
+Rule    AV          1986       1987       -              Oct         Sun>=15              2:00s      1:00        D
+Rule    AV          1988       1999       -              Oct         lastSun 2:00s      1:00        D
+Rule    AV          1991       1994       -              Mar        Sun>=1 2:00s      0              S
+Rule    AV          1995       2005       -              Mar        lastSun 2:00s      0              S
+Rule    AV          2000       only       -              Aug        lastSun 2:00s      1:00        D
+Rule    AV          2001       2007       -              Oct         lastSun 2:00s      1:00        D
+Rule    AV          2006       only       -              Apr         Sun>=1 2:00s      0              S
+Rule    AV          2007       only       -              Mar        lastSun 2:00s      0              S
+Rule    AV          2008       max       -              Apr         Sun>=1 2:00s      0              S
+Rule    AV          2008       max       -              Oct         Sun>=1 2:00s      1:00        D
# Zone NAME                   GMTOFF              RULES   FORMAT              [UNTIL]
Zone Australia/Melbourne 9:39:52 -       LMT       1895 Feb
-                                              10:00     Aus        EST         1971
-                                              10:00     AV          EST
+                                             10:00     Aus        E%sT      1971
+                                             10:00     AV          E%sT
 # New South Wales
# Rule  NAME   FROM   TO          TYPE      IN           ON         AT           SAVE     LETTER/S
-Rule     AN          1971       1985       -              Oct         lastSun 2:00s      1:00        -
-Rule     AN          1972       only       -              Feb        27           2:00s      0              -
-Rule     AN          1973       1981       -              Mar        Sun>=1 2:00s      0              -
-Rule     AN          1982       only       -              Apr         Sun>=1 2:00s      0              -
-Rule     AN          1983       1985       -              Mar        Sun>=1 2:00s      0              -
-Rule     AN          1986       1989       -              Mar        Sun>=15              2:00s      0              -
-Rule     AN          1986       only       -              Oct         19           2:00s      1:00        -
-Rule     AN          1987       1999       -              Oct         lastSun 2:00s      1:00        -
-Rule     AN          1990       1995       -              Mar        Sun>=1 2:00s      0              -
-Rule     AN          1996       2005       -              Mar        lastSun 2:00s      0              -
-Rule     AN          2000       only       -              Aug        lastSun 2:00s      1:00        -
-Rule     AN          2001       2007       -              Oct         lastSun 2:00s      1:00        -
-Rule     AN          2006       only       -              Apr         Sun>=1 2:00s      0              -
-Rule     AN          2007       only       -              Mar        lastSun 2:00s      0              -
-Rule     AN          2008       max       -              Apr         Sun>=1 2:00s      0              -
-Rule     AN          2008       max       -              Oct         Sun>=1 2:00s      1:00        -
+Rule    AN          1971       1985       -              Oct         lastSun 2:00s      1:00        D
+Rule    AN          1972       only       -              Feb        27           2:00s      0              S
+Rule    AN          1973       1981       -              Mar        Sun>=1 2:00s      0              S
+Rule    AN          1982       only       -              Apr         Sun>=1 2:00s      0              S
+Rule    AN          1983       1985       -              Mar        Sun>=1 2:00s      0              S
+Rule    AN          1986       1989       -              Mar        Sun>=15              2:00s      0              S
+Rule    AN          1986       only       -              Oct         19           2:00s      1:00        D
+Rule    AN          1987       1999       -              Oct         lastSun 2:00s      1:00        D
+Rule    AN          1990       1995       -              Mar        Sun>=1 2:00s      0              S
+Rule    AN          1996       2005       -              Mar        lastSun 2:00s      0              S
+Rule    AN          2000       only       -              Aug        lastSun 2:00s      1:00        D
+Rule    AN          2001       2007       -              Oct         lastSun 2:00s      1:00        D
+Rule    AN          2006       only       -              Apr         Sun>=1 2:00s      0              S
+Rule    AN          2007       only       -              Mar        lastSun 2:00s      0              S
+Rule    AN          2008       max       -              Apr         Sun>=1 2:00s      0              S
+Rule    AN          2008       max       -              Oct         Sun>=1 2:00s      1:00        D
# Zone NAME                   GMTOFF              RULES   FORMAT              [UNTIL]
Zone Australia/Sydney 10:04:52 -             LMT       1895 Feb
-                                              10:00     Aus        EST         1971
-                                              10:00     AN          EST
+                                             10:00     Aus        E%sT      1971
+                                             10:00     AN          E%sT
Zone Australia/Broken_Hill 9:25:48 -       LMT       1895 Feb
                                               10:00     -              EST         1896 Aug 23
                                               9:00        -              CST         1899 May
-                                              9:30        Aus        CST         1971
-                                              9:30        AN          CST         2000
-                                              9:30        AS           CST
+                                             9:30        Aus        C%sT     1971
+                                             9:30        AN          C%sT     2000
+                                             9:30        AS           C%sT
 # Lord Howe Island
# Rule  NAME   FROM   TO          TYPE      IN           ON         AT           SAVE     LETTER/S
-Rule     LH           1981       1984       -              Oct         lastSun 2:00        1:00        -
-Rule     LH           1982       1985       -              Mar        Sun>=1 2:00        0              -
-Rule     LH           1985       only       -              Oct         lastSun 2:00        0:30        -
-Rule     LH           1986       1989       -              Mar        Sun>=15              2:00        0              -
-Rule     LH           1986       only       -              Oct         19           2:00        0:30        -
-Rule     LH           1987       1999       -              Oct         lastSun 2:00        0:30        -
-Rule     LH           1990       1995       -              Mar        Sun>=1 2:00        0              -
-Rule     LH           1996       2005       -              Mar        lastSun 2:00        0              -
-Rule     LH           2000       only       -              Aug        lastSun 2:00        0:30        -
-Rule     LH           2001       2007       -              Oct         lastSun 2:00        0:30        -
-Rule     LH           2006       only       -              Apr         Sun>=1 2:00        0              -
-Rule     LH           2007       only       -              Mar        lastSun 2:00        0              -
-Rule     LH           2008       max       -              Apr         Sun>=1 2:00        0              -
-Rule     LH           2008       max       -              Oct         Sun>=1 2:00        0:30        -
+Rule    LH           1981       1984       -              Oct         lastSun 2:00        1:00        D
+Rule    LH           1982       1985       -              Mar        Sun>=1 2:00        0              S
+Rule    LH           1985       only       -              Oct         lastSun 2:00        0:30        D
+Rule    LH           1986       1989       -              Mar        Sun>=15              2:00        0              S
+Rule    LH           1986       only       -              Oct         19           2:00        0:30        D
+Rule    LH           1987       1999       -              Oct         lastSun 2:00        0:30        D
+Rule    LH           1990       1995       -              Mar        Sun>=1 2:00        0              S
+Rule    LH           1996       2005       -              Mar        lastSun 2:00        0              S
+Rule    LH           2000       only       -              Aug        lastSun 2:00        0:30        D
+Rule    LH           2001       2007       -              Oct         lastSun 2:00        0:30        D
+Rule    LH           2006       only       -              Apr         Sun>=1 2:00        0              S
+Rule    LH           2007       only       -              Mar        lastSun 2:00        0              S
+Rule    LH           2008       max       -              Apr         Sun>=1 2:00        0              S
+Rule    LH           2008       max       -              Oct         Sun>=1 2:00        0:30        D
Zone Australia/Lord_Howe 10:36:20 -    LMT       1895 Feb
                                               10:00     -              EST         1981 Mar
-                                              10:30     LH           LHST
+                                             10:30     LH           LH%sT
 # Australian miscellany
#
@@ -841,39 +841,15 @@
# Implementation Dates of Daylight Saving Time within Australia
# </a> summarizes daylight saving issues in Australia.
-# From Arthur David Olson (2005-12-12):
-# <a href="http://www.lawlink.nsw.gov.au/lawlink/Corporate/ll_agdinfo.nsf/pages/community_relations_daylight_saving">
-# Lawlink NSW:Daylight Saving in New South Wales
-# </a> covers New South Wales in particular.
-
-# From John Mackin (1991-03-06):
-# We in Australia have _never_ referred to DST as `daylight' time.
-# It is called `summer' time.  Now by a happy coincidence, `summer'
-# and `standard' happen to start with the same letter; hence, the
-# abbreviation does _not_ change...
-# The legislation does not actually define abbreviations, at least
-# in this State, but the abbreviation is just commonly taken to be the
-# initials of the phrase, and the legislation here uniformly uses
-# the phrase `summer time' and does not use the phrase `daylight
-# time'.
-# Announcers on the Commonwealth radio network, the ABC (for Australian
-# Broadcasting Commission), use the phrases `Eastern Standard Time'
-# or `Eastern Summer Time'.  (Note, though, that as I say in the
-# current australasia file, there is really no such thing.)  Announcers
-# on its overseas service, Radio Australia, use the same phrases
-# 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 (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 Timothy Arceri (2013-04-09)
+# Webpage that lists the Australian Governments recommended time zone names and abbreviations:
+# http://australia.gov.au/about-australia/our-country/time
+#
+# NSW Goverment time definitions (covers time zones and abbreviations):
+# http://www.communityrelations.lawlink.nsw.gov.au/cru/daylight/definitions_of_time.html
 # From Chuck Soper (2006-06-01):
-# I recently found this Australian government web page on time zones:
-# <http://www.australia.gov.au/about-australia-13time>
-# And this government web page lists time zone names and abbreviations:
+# This government web page lists time zone names and abbreviations:
# <http://www.bom.gov.au/climate/averages/tables/daysavtm.shtml>
 # From Paul Eggert (2001-04-05), summarizing a long discussion about "EST"
@@ -957,6 +933,33 @@
#   saying that both AEST/AEDT and EST/EST are widely used and
#   understood in Australia.
+# From Timothy Arceri (2013-04-09), results from a long discussion about
+# "EST" - Eastern Summer Time versus "EDT" - Eastern Daylight Time etc.:
+#
+# * Do Australians more often use "EDT" or "EST"?
+#
+#   875,000 "Eastern Standard Time (EST)" site:.au
+#   655,000 "Eastern Standard Time (AEST)" site:.au
+#
+#         6 "Eastern Summer Time (EST)" site:.au
+#        64 "Eastern Summer Time (AEST)" site:.au
+#    30,500 "Eastern Daylight Time (EDT)" site:.au
+#   180,000 "Eastern Daylight Time (AEDT)" site:.au
+#
+#   357,000 "Central Standard Time (CST)" site:.au
+#       316 "Central Standard Time (ACST)" site:.au
+#
+#         4 "Central Summer Time (CST)" site:.au
+#         0 "Central Summer Time (ACST)" site:.au
+#
+#    19,600 "Central Daylight Time (CDT)" site:.au
+#       157 "Central Daylight Time (ACDT)" site:.au
+#
+#   Here we are only looking at cases where the time zone abbreviation
+#   has been defined. These results show that the abbreviation for Daylight
+#   time EDT/AEDT/CDT/ACDT is overwhelmingly greater than the usage of the
+#   abbreviation for Summer time EST/AEST/CST/ACST
+
# From Paul Eggert (1995-12-19):
# Shanks & Pottenger report 2:00 for all autumn changes in Australia and NZ.
# Mark Prior writes that his newspaper
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