GNU bug report logs - #26164
time-difference mishandles leap seconds

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From: John Cowan <cowan <at> ccil.org>
To: zefram <at> fysh.org
Cc: Mark H Weaver <mhw <at> netris.org>, 26164 <at> debbugs.gnu.org
Subject: bug#26164: time-difference mishandles leap seconds
Date: Mon, 5 Nov 2018 08:47:46 -0500

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On Mon, Nov 5, 2018 at 6:03 AM Zefram <zefram <at> fysh.org> wrote:

Mark H Weaver wrote:
>
> No, that's not how UTC works.


Everything Zefram says is what I was trying to say and failing.

I would only add that:

1) TAI-UTC refers to broken-down time, not to the count
of seconds since some epoch.  TAI-UTC is currently 37 seconds, which means
that at 2018-11-05T13:43:00 UTC time (approximately when I am writing this)
it is
2018-11-05T13:43:37 TAI time.

2) Posix time, unlike UTC really does label leap seconds with the same
integer as the
preceding second.


> >Having said all of this, I should admit that I'm not an expert on time
> >standards,
>
> I am.
>

He is.

-- 
John Cowan          http://vrici.lojban.org/~cowan        cowan <at> ccil.org
There is no real going back.  Though I may come to the Shire, it will
not seem the same; for I shall not be the same.  I am wounded with
knife, sting, and tooth, and a long burden.  Where shall I find rest?
                --Frodo

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