Re: Diary icalendar tests still broken

Richard Lawrence <[email protected]> Tue, 28 Jul 2026 12:03:18 +0200
Newsgroups gmane.emacs.devel
Message-ID <[email protected]>
Sean Whitton <[email protected]> writes:

> Richard Lawrence [25/Jul  8:30am +02] wrote:
>>
>> I just tried it, also on Debian (12.15)...no errors here.  What errors
>> are you seeing?  And what time zone is the system using on which you're
>> running the tests?  Maybe there's something about your build environment
>> that's relevantly different from mine?  Let me know what information you
>> need to help narrow this down.
>
> I've included the log below.  My timezone is BST.  It looks like the
> problem may be assuming UTC?

Ah ha!  The problem is timezone specific but I can reliably reproduce it
now in at least these zones:

- Europe/London
- Europe/Dublin  
- Portugal
- Atlantic/Madeira
- Antarctica/Troll
- Africa/Bissau 
- Africa/Abidjan 
- Africa/Monrovia 
- Atlantic/Faroe

So it seems to be related to zones which are UTC+0:00 in standard time,
though UTC itself works fine, as do Europe/Vienna, Asia/Singapore, and
America/Juneau.

(Pip Cet, now in CC, reported this to me for Europe/Dublin some time
ago, which was an important clue.  Thanks!)

I'll have to look into it more carefully to come up with a fix but now
at least I can reproduce it and debug it.

-- 
Best,
Richard