From: Mark H Weaver <mhw@netris.org>
To: Zefram <zefram@fysh.org>
Cc: 26164@debbugs.gnu.org
Subject: bug#26164: time-difference mishandles leap seconds
Date: Mon, 05 Nov 2018 19:12:49 -0500 [thread overview]
Message-ID: <871s7znjvn.fsf@netris.org> (raw)
In-Reply-To: <20181105110236.ypop5ihwnajobcqs@fysh.org> (Zefram's message of "Mon, 5 Nov 2018 11:02:36 +0000")
Zefram <zefram@fysh.org> writes:
> Mark H Weaver wrote:
>> every UTC day has
>>exactly 86400 UTC seconds,
>
> No, that's not how UTC works. There are some time scales derived from UTC
> that have exactly 86400 seconds for each UTC day, such as Markus Kuhn's
> UTC-SLS, or that have exactly 86400 seconds per UTC day in the long run,
> such as Google's "leap smear". But SRFI-19 doesn't refer to any of those,
> it refers to UTC.
BTW, I discussed this with John Cowan at length in bug 22034, starting
at message #19:
https://bugs.gnu.org/22034#19
In particular, I would be curious to know how you would fill in the same
table that John attempted to fill in, here:
https://bugs.gnu.org/22034#55
What numbers would you write in the second column of those tables?
Thanks,
Mark
prev parent reply other threads:[~2018-11-06 0:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-18 22:41 bug#26164: time-difference mishandles leap seconds Zefram
2017-04-19 14:32 ` Andy Wingo
2017-04-19 16:22 ` Zefram
2018-10-21 22:56 ` Mark H Weaver
2018-11-05 11:02 ` Zefram
2018-11-05 13:47 ` John Cowan
2018-11-05 20:46 ` Mark H Weaver
2018-11-06 0:12 ` Mark H Weaver [this message]
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