Thank you Benjamin (bdrung) -- the problem was that my .bashrc/.bash_profile set TZ=Canada/Eastern, a legacy time zone name, and that legacy name disappeared in Ubuntu 24.04.1. Its disappearance caused many programs to silently misbehave, including both "date" and the GUI. Setting TZ=America/Toronto has fixed my problem, but let this bug report be a plea to have programs give diagnostics when TZ doesn't contain a valid time zone.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2092236 Title: 24.04.1 tzdata with unknown time zone quietly causes havoc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/2092236/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs