Re: patch for datetime.c

From: Ian Lance Taylor <ian(at)airs(dot)com>
To: Joseph Shraibman <jks(at)selectacast(dot)net>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "pgsql-patches(at)postgresql(dot)org" <pgsql-patches(at)postgresql(dot)org>
Subject: Re: patch for datetime.c
Date: 2001-05-08 05:38:18
Message-ID: sisnigqu2d.fsf@daffy.airs.com
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Joseph Shraibman <jks(at)selectacast(dot)net> writes:

> Well not horrid, but stopgap. There needed to be soemthing that kept
> there from being 60 seconds in the output.

Don't forget that there are minutes with 61 seconds in UTC, due to
leap seconds. See, e.g.,
http://cr.yp.to/proto/utctai.html

For example, 1997-06-30 23:59:60 is a correct time in UTC. Many free
Unix systems will return times like this when the time zone is set
appropriately. For example, on my Red Hat 6.1 system, this:
TZ=right/UTC date --date='June 30, 1997 23:59:60 +0000'
will print this:
Mon Jun 30 23:59:60 UTC 1997
(for comparison:
> TZ=posix/UTC date --date='June 30, 1997 23:59:60 +0000'
Tue Jul 1 00:00:00 UTC 1997
)

Ian

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