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<p><tt>And in Canada, AST stands for Atlantic Standard Time, 4h west
of GMT</tt></p>
<p><tt>See file northamerica</tt></p>
<p><tt></tt>
<blockquote type="cite"># From Alain LaBonté (1994-11-14):<br>
# I post here the time zone abbreviations standardized in Canada<br>
# for both English and French in the CAN/CSA-Z234.4-89
standard....<br>
#<br>
# UTC Standard time Daylight saving time<br>
# offset French English French English<br>
# -2:30 - - HAT NDT<br>
# -3 - - HAA ADT<br>
# -3:30 HNT NST - -<br>
# -4 HNA AST HAE EDT<br>
# -5 HNE EST HAC CDT<br>
# -6 HNC CST HAR MDT<br>
# -7 HNR MST HAP PDT<br>
# -8 HNP PST HAY YDT<br>
# -9 HNY YST - -<br>
#<br>
# HN: Heure Normale ST: Standard Time<br>
# HA: Heure Avancée DT: Daylight saving Time<br>
#<br>
# A: de l'Atlantique Atlantic<br>
# C: du Centre Central<br>
# E: de l'Est Eastern<br>
# M: Mountain<br>
# N: Newfoundland<br>
# P: du Pacifique Pacific<br>
# R: des Rocheuses<br>
# T: de Terre-Neuve<br>
# Y: du Yukon Yukon<br>
</blockquote>
<br>
</p>
<div class="moz-cite-prefix">On 07.09.19 11:29, Alois Treindl wrote:<br>
</div>
<blockquote type="cite"
cite="mid:6f86ba42-7e26-9a5c-ff02-686726e9d6ca@astro.ch">
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<p><tt>I think the change was made because many abbreviations were
ambiguous.<br>
In the US, AST is commonly used for Standard Alaska Time, 10h
west of GMT.</tt></p>
<p><tt>See the entry in file NEWS of Release 2017a - 2017-02-28
00:05:36 -0800</tt></p>
<p> </p>
<blockquote type="cite"> Changes to past and future time zone
abbreviations<br>
<br>
Switch to numeric time zone abbreviations for South America,
as<br>
part of the ongoing project of removing invented
abbreviations.<br>
This avoids the need to invent an abbreviation for the new
Chilean<br>
new zone. Similarly, switch from invented to numeric time
zone<br>
abbreviations for Afghanistan, American Samoa, the Azores,<br>
Bangladesh, Bhutan, the British Indian Ocean Territory,
Brunei,<br>
Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is,
Cook Is,<br>
Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland,<br>
Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie,
Malaysia,<br>
the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia,<br>
Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I,
Palau,<br>
Papua New Guinea, the Philippines, Pitcairn, Qatar, Réunion,
St<br>
Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles,
Singapore,<br>
Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis &
Futuna, and<br>
Xinjiang; for 20-minute daylight saving time in Ghana before
1943;<br>
for half-hour daylight saving time in Belize before 1944 and
in<br>
the Dominican Republic before 1975; and for Canary Islands
before<br>
1946, for Guinea-Bissau before 1975, for Iceland before
1969, for<br>
Indian Summer Time before 1942, for Indonesia before around
1964,<br>
for Kenya before 1960, for Liberia before 1973, for Madeira
before<br>
1967, for Namibia before 1943, for the Netherlands in
1937-9, for<br>
Pakistan before 1971, for Western Sahara before 1977, and
for<br>
Zaporozhye in 1880-1924.<br>
<br>
For Alaska time from 1900 through 1967, instead of "CAT" use
the<br>
abbreviation "AST", the abbreviation commonly used at the
time<br>
(Atlantic Standard Time had not been standardized yet). Use
"AWT"<br>
and "APT" instead of the invented abbreviations "CAWT" and
"CAPT".<br>
</blockquote>
<br>
<div class="moz-cite-prefix">On 07.09.19 07:15, Elena Sharovar
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAN17RT3q93KFcXhXKtLp2FRdG=As7ahdY5WJqc_9nDvuEF8K6A@mail.gmail.com">
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charset=UTF-8">
<div dir="ltr">Hi Iana Team,<br>
<br>
where can I find some explanation why in 2017a format changed
from AST to +03?<br>
and the same happened in a lot of timezones (letter
abbreviations changed to +03, +02, etc.)<br>
<br>
// 2016j<br>
Zone Asia/Riyadh 3:06:52 - LMT 1947 Mar 14<br>
3:00 -<b> AST</b><br>
<br>
// 2017a<br>
Zone Asia/Riyadh 3:06:52 - LMT 1947 Mar 14<br>
3:00 - <b>+03</b><br>
<br>
Thanks & Regards,<br>
Elena.</div>
</blockquote>
</blockquote>
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