https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101152
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever confirmed|0 |1 Last reconfirmed| |2021-12-07 --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- I think the bug is that it treats 03 as 1903 instead of 0003. It is not supposed to print "N/A" though. %Y doesn't require exactly 4 digits, it allows 1-4 and interprets the value read as the year (rather than interpreting it as a year between 1969 and 2068 like %y). So if it reads "20" that isn't an error, it means the year 20 A.D.