Vorbis dev - Aug 2001 - time zone issues

>RFC822 is HISTORIC: please refer to RFC2822 instead.
>
>While UTC is sufficient for human beings, but not necessarily accurate
>for machines, because of the leap year adjustment.  TAI is the
You mean leap seconds, not leap years. 
Since 1972, UTC == TAI modulo some number of seconds.
Leap Seconds are announced officially by the IERS 
http://www.iers.org/iers/products/eop/leap.html

RFC2822 explicitly refers to "local time" and to UTC. Local
(or civil) time is ALWAYS UTC (modulo some hours). UTC, expressed (as it should
be) in hours minutes seconds format, is unambigous.

So, if you want to be consistent with rfc2822, use local time or UTC. I
don't
think you need the rigor of TAI, and, if you use TAI, your internal clock time
will be 20+ seconds off from the time on people's watches, which is likely
to
cause trouble.

Regards
Marshall Eubanks
> ultimate
>goal if you only allow ONE choice for recording the calender time.
>
>Parsing RFC2822-style time zone notation is really a headache.
>
>Just a thought for time zone handling.
>
>// Kenji Rikitake
>
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Marshall Eubanks

tme@21rst-century.com

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In the message <3b896cee.39c.0@idsonline.com>
at Sun, Aug 26, 2001 at 05:40:40PM -0400,
Marshall Eubanks <tme@21rst-century.com> writes:
> You mean leap seconds, not leap years. 
You are right.  Excuse me for such a silly mistake.

I accept human-readable things to be represented in UTC, but if you
really have to make an 'absolute' time comparison you need to deal with
TAI.  This means you have to have a leap second table as a part of the
OS locale database and treat UTC and other local time zones as locales.
That's how the things are implemented in *BSD for dealing with the leap
seconds.  Actually, my machines are running in TAI, while using UTC and
the local time for the all application locales.

// Kenji Rikitake

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