https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95624
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Blocks| |86976 Ever confirmed|0 |1 Last reconfirmed| |2020-06-10 Status|UNCONFIRMED |NEW --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- strftime is nothing to do with GCC, that comes from MinGW and/or the Windows CRT. The std::put_time function uses std::time_put which doesn't implement any of the new conversion specifiers added in C99, including %e. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86976 [Bug 86976] [meta-bug] Issues with std::time_get, std::time_put etc.