[Bug libstdc++/103612] get_time %y parsing error for two digits year

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103612

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note, the above is GCC 12 behavior, in 11.x and earlier it has been indeed
broken and %y and %C were aliases to %Y.