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Postings from August 2005
From: Mark Reed
August 15, 2005 13:41
Message ID: BF26761F.B3FBfirstname.lastname@example.org
On 2005-08-15 13:56, "Larry Wall" <email@example.com> wrote:
> Perl 6 will natively think of dates as number of floating point TAI
> seconds from the year 2000. You can build any kind of date interface
> on top of that, but we're going for simplicity and predictability.
I applaud that decision. I just have one question: will the zero point be
chosen according to TAI or UTC?
I would assume that you would choose time 0.0 = Jan 1, 2000 at 00:00:00.0
TAI (December 31, 1999 at 23:59:29.0 UTC), making the whole thing free of
any UTC interferences. But there is an argument for making the zero point a
recognizable boundary in civil time. The Olson library does that (its zero
point is 00:00:10.0 TAI on Jan 1, 1970), but that's only because it's
designed to be a drop-in replacement for the standard POSIX library and the
time_t values have to match. Since you're changing the epoch, there's no
compatibility constraint here . . .