[Bug libstdc++/103687] [12 regression] several time/date failures after r12-5898

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103687

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> Another one would be to use the C APIs to query it (setlocale and
> nl_langinfo).

That's what I've done in some other tests, to workaround differences in locale
data between Debian-based and other distros.