bug#60987: 30.0.50; Calendar not accepting custom holidays

[Eli Zaretskii]

> Date: Sun, 22 Jan 2023 16:26:46 +0100
> From: "Emanuele M. Monterosso" <emanuele.monterosso@gmail.com>
> Cc: "60987@debbugs.gnu.org" <60987@debbugs.gnu.org>
> 
> On the other hand I confirm this bug still happens under WSL Ubuntu for 
> emacs30 but not for emacs 28.2,
> haven’t tried emacs29 and my config depends on some things 
> 
> and features in emacs29, gonna wait until pretest I guess. 

Maybe it's a problem with the Emacs 30 build you used?  It isn't a
build from the Emacs repository, so perhaps it has some changes that
cause this?