I just noticed this because I had amended some merge commits with git commit --amend --date=now to update them, and that gets some funny broken timezones. I suspect it's some silly daylight savings time issue. Lookie here, I can reproduce it trivially with current git (in the git repo itself): [torvalds@i7 git]$ date; git commit -m Test --allow-empty --date=now Tue Apr 14 21:11:03 PDT 2015 [master ec7733db5360] Test Date: Tue Apr 14 20:11:03 2015 -0800 notice how the commit date message shows something funny. It shows an hour earlier, but in -0800. And the resulting commit is broken: [torvalds@i7 git]$ git show --pretty=fuller commit ec7733db5360966434e03eab1a849e6d4227231c (HEAD -> master) Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> AuthorDate: Tue Apr 14 20:11:03 2015 -0800 Commit: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> CommitDate: Tue Apr 14 21:11:03 2015 -0700 Test notice how the AuthorDate has that "-0800", but the CommitDate has "-0700". Hmm. I can't be the only one seeing this? My guess is that there's a missing initialization of tm.tm_isdst somewhere or whatever. The above is with current git: [torvalds@i7 git]$ git version git version 2.4.0.rc2 Anybody? Linus -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html