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From: Toby Speight <Toby.Speight@streapadair.freeserve.co.uk>
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Subject: Re: Time zone and 'lapsed under NT
Date: 09 Jul 1999 17:31:20 +0100
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Lars> Lars Magne Ingebrigtsen <URL:mailto:larsi@gnus.org>

0> In <URL:news:m34sjdsv8e.fsf@quimbies.gnus.org>, Lars wrote:

Lars> I've had reports the when doing X-Sent headers under NTEmacs and
Lars> XEmacs for NT, the time zone seems to be ignored.  Could someone
Lars> investigate what's going on here?

It seems to be ignoring the local time zone (it takes account of the
one on the message but assumes that the (current-time) is returning UT
rather than local time - or the other way around?

For me, (current-time-zone) returns '(3600 "GMT Daylight Time"); I
wonder if the zone name is causing confusion.  It's certainly a strange
identifier for BST!  The offset of 3600 is correct for me, though.

[Aside:

      (let ((tz (car (current-time-zone))))
        (format "Date: %s %s%04d" (current-time-string time)
                (if (> tz 0) "+" "-") (abs (/ tz 36))))

won't work very well for non-integral time zones - India will appear
as +0550 instead of +0530.]

The Emacs documentation doesn't describe (current-time) very well.  It
says, "the current time, as the number of seconds since 1970-01-01
00:00:00" - without specifying a time zone for that epoch...