bug#54756: 28.1; faulty date interpretation

[Lars Ingebrigtsen]

Peter Dyballa <Peter_Dyballa@Web.DE> writes:

> I think it's close to impossible to reproduce the bug when launching GNU 
> Emacs with -Q, because dates in diary file are read and they must be 
> interpreted the proper way, the European and natural way, as day - month - 
> year (or in reverse):
>
> %%(diary-anniversary  4  6 1862) Geburt von Karl Valentin in München-Au als 
> Valentin Ludwig Fey %d Jahren
> %%(diary-anniversary  4  6 2020) Tod von Rupert Neville Hine
>
> Today all my versions of GNU Emacs 28.x report that it's the birth date of 
> Karl Valentin and the death date of Rupert Hine:
>
>       Sunrise 06 Uhr 53, sunset 20 Uhr 04 at Friedberg (13:11 hrs daylight)
>       Geburt von Karl Valentin in München-Au als Valentin Ludwig Fey 160 
> Jahren
>       Tod von Rupert Neville Hine
>
> The versions 27.x display that today's date (probably) was not much 
> meaningful for the two men.

I'm not sure I understand what you mean here, but perhaps I'm not
reproducing the problem correctly.

If I put the following inn ~/.emacs.d/diary, and then start Emacs 27.1
with -Q, and then say `M-x diary':

%%(diary-anniversary  4  7 1862) Geburt von Karl Valentin in München-Au als 
Valentin Ludwig Fey %d Jahren
%%(diary-anniversary  4  7 2020) Tod von Rupert Neville Hine

I get

I get exactly the same in Emacs 28.1.

I never use diary, so I don't know whether this is what's expected or
not.  Could you explain what you expected to see here, or whether you're
seeing something else in Emacs 28.1?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no