GNU bug report logs - #53702
27.1; diary does not display some entries in european style

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#53702: closed (27.1; diary does not display some entries in
 european style)
Date: Sun, 23 Feb 2025 05:39:02 +0000

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Your message dated Sun, 23 Feb 2025 05:38:05 +0000
with message-id <CADwFkmkvPjkBXfcG8-8KDvVriRF4kToaDct=Lf4pSDRur7HWzA <at> mail.gmail.com>
and subject line Re: bug#53702: 27.1; diary does not display some entries in european style
has caused the debbugs.gnu.org bug report #53702,
regarding 27.1; diary does not display some entries in european style
to be marked as done.

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From: Francesco Potortì <pot <at> gnu.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.1; diary does not display some entries in european style
Date: Tue, 01 Feb 2022 17:21:54 +0100

Diary entries are not parsed by M-x diary if:
- calendar-date-style is set to european (rather than american)
AND
- the date is written as "3 Feb" (rather than 3/2)
AND
- the time is written as "18.00" (rather than 18:00)

At least, this is what I have found by trial and error.  I looked at the code in appt.el and diary-lib.el but was not able to find the culprit...

To reproduce:

$ emacs -Q -nw --load=appt-bug.el

You will see that only two european entries are shown (t1 and t2).

Then exit Emacs, comment out the second line in appt-bug-el and rerun Emacs as above: you will see four american entries (t1, t2, t3, t4).


================ appt-bug.el
(setq diary-file "~/appt-bug-diary"
      calendar-date-style 'european
      )
(load-library "diary-lib")
(diary-list-entries (list 2 3 (decoded-time-year (decode-time))) 1)


================ appt-bug-diary
	-*-diary-*-

3 Feb	18:00 t1 works (european)

3/2	18.00 t2 works (european)

3 Feb	18.00 t3 does not work (european)

3 Feb
	18.00 t4 does not work (european)

Feb 3	18:00 t1 works (american)

2/3	18.00 t2 works (american)

Feb 3	18.00 t3 works (american)

Feb 3
	18.00 t4 works (american)

[Message part 3 (message/rfc822, inline)]

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>,
 Michael Heerdegen <michael_heerdegen <at> web.de>
Cc: Francesco Potortì <pot <at> gnu.org>,
 53702-done <at> debbugs.gnu.org
Subject: Re: bug#53702: 27.1;
 diary does not display some entries in european style
Date: Sun, 23 Feb 2025 05:38:05 +0000

Version: 31.1

Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> Michael Heerdegen <michael_heerdegen <at> web.de> writes:
>
>> did you have the chance to try if that patch (repeated below) fixes your
>> problem?
>
> This was half a year ago, but I see that Francesco wasn't in the CCs, so
> perhaps he never got the message?
>
> Francesco, can you try Michael's patch and see whether that fixes the
> problem?
>
>> I'm now a bit worried about this paragraph in
>> (info "(emacs) Appointments"):
>>
>> |    You can write times in am/pm style (with ‘12:00am’ standing for
>> | midnight and ‘12:00pm’ standing for noon), or 24-hour European/military
>> | style.  You need not be consistent; your diary file can have a mixture
>> | of the two styles.  Times must be at the beginning of diary entries if
>> | they are to be recognized.
>>
>> Military style is 1200 for 12:00am, right?  This definitely can't be
>> used everywhere when using the European style because lines get
>> ambiguous: for digits could mean a year - or a military time in a line
>> not specifying a year.  Should that paragraph be corrected?
>
> 12:00am (midnight) is the same as 00:00/24:00 in military style.

This patch fixes the bug here, so I installed it with a fixed up commit
message (commit 8b0043ffd60).  I'm therefore closing this bug report.

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