Hallo Peter,
On Thu, 21 Sep 2000 14:01:40 +0200 GMT (21/09/2000, 20:01 +0800 GMT),
Peter Steiner wrote:
PS> BTW: mentioning GMT is IMHO not really correct, as GMT is an
PS> abbreviation for one of the +0000 timezones (is that correct?).
Not quite. There is only one GMT time zone. +0000 means that this time
zone is 00 (zero) hours and 00 minutes ahead of GMT (ie equal to GMT).
GMT (Greenwich Mean Time) is the time (not time zone) that is correct
(relative to the sun) at the longitute of a place called Greenwich in
England. (This made the Americans uncomfortable; Greenwich had
competed with Timbuktu and New York for being the place at which's
longitute the Mean Time was to be defined. New York did obviously not
win. So, now, in air traffic, they have renamed GMT to UTC: Universal
Time Coordinates. So that the name doesn't refer to a place outside of
the US.)
GMT is always the same; standard time in England is GMT (or +0000, if
you prefer), and daylight savings time is therefore GMT+0100. CET is
GMT+0100, and CEST is GMT+0200. You see, when people say +0700, what
they mean is GMT+0700: 7 hours and no minutes ahead of GMT.
Why minutes? Some countries (Myanmar springs to mind) are so many
hours and 30 minutes, other countries so many hours and 15 minutes,
ahead of GMT.
PS> If the sender has his timezone (the SUBPATT 4) not as numbers, but
PS> as abbreviation, that will give something like 'GMT CEST' which is
PS> slightly confusing.
I think I read in an RFC somehwere that it is unfortunately allowed to
use these abbreviations instead of just the GMT bias. CST can
therefore be Central Standard Time in USA (i.e. Chicago time) or China
Standard Time (Beijing, Singapore, Taipei), depending on which part of
the world you happen to live in.
And no, this RE, which Alex created for TBUDL a long time ago, does
not account for the abbreviations. It requires the GMT offset.
--
Cheers,
Thomas mailto:[EMAIL PROTECTED]
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