Paolo Bonzini wrote: >>> Going backwards from "cal 1 1" you can see that in >>> the Julian calendar 01-Jan-0000 was a Thursday, but that's not so >>> relevant. >>> >>> However cal can help seeing that 01-Jan-0000 is a Saturday in >>> Gregorian proleptic calendar (i.e. extending Gregorian calendar before >>> the day when it was adopted). 400 years have 146097 days, which is >>> divisible by 7, and 01-Jan-2000 was a Saturday. >> >> If that's true, then this new test failure suggests there's a bug in mktime. > > For the record, GNU Smalltalk gives the same answer.
Good. So does erlang. In converting that to a proper gnulib-style test, I realized that I'd interpreted reversed diffs. This (actual output) is right: -62167219200 Sat and the expected output in posixtm.c was wrong.
