Re:It’s time to leave the leap second in the past
by akira2501 on Monday July 25, 2022 @11:26PM
(#32233905)
See the code for __mktime_internal in glibc, specifically the case for which it returns EOVERFLOW; but in general, the whole file has many comments worth reading.
https://code.woboq.org/userspace/glibc/time/mktime.c.html