From: Paul Eggert <eggert@cs.ucla.edu>
To: Lars Ingebrigtsen <larsi@gnus.org>,
"Basil L. Contovounesios" <contovob@tcd.ie>
Cc: emacs-devel@gnu.org
Subject: Re: [Emacs-diffs] master 6cfda69 1/2: Add support for dealing with decoded time structures
Date: Wed, 31 Jul 2019 19:38:59 -0700 [thread overview]
Message-ID: <02976867-d320-51aa-c4cb-864831a5ac35@cs.ucla.edu> (raw)
In-Reply-To: <87mugund5x.fsf@mouse.gnus.org>
>>> +(defun date-days-in-month (year month)
>>> + "The number of days in MONTH in YEAR."
>>> + (if (= month 2)
>>> + (if (date-leap-year-p year)
>>> + 29
>>> + 28)
>>> + (if (memq month '(1 3 5 7 8 10 12))
>>> + 31
>>> + 30)))
>>
>> Doesn't this already exist as the Gregorian calendar-last-day-of-month
>> in calendar.el?
>
> Yes, apparently. (I didn't know about it.)
The two functions are not equivalent, as date-days-in-month uses astronomical
year numbering, whereas calendar-last-day-of-month uses traditional year
numbering, with no year zero.
next prev parent reply other threads:[~2019-08-01 2:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190729122247.28663.99759@vcs0.savannah.gnu.org>
[not found] ` <20190729122257.00600207F5@vcs0.savannah.gnu.org>
2019-07-30 5:19 ` master 6cfda69 1/2: Add support for dealing with decoded time structures Glenn Morris
2019-07-30 10:01 ` Lars Ingebrigtsen
2019-07-31 20:31 ` [Emacs-diffs] " Basil L. Contovounesios
2019-07-31 20:48 ` Lars Ingebrigtsen
2019-08-01 2:38 ` Paul Eggert [this message]
2019-08-01 9:35 ` Basil L. Contovounesios
2019-08-01 11:21 ` Lars Ingebrigtsen
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