@prologic Maybe her -00:00 timezones throws off a parser? I think I tried this edge case when coming up with the twt hash spec, but can’t tell anymore for sure. At least I’ve written this (2020-12-13T07:45:23-00:00 → 2020-12-13T07:45:23Z) explicitly down. The thing is, I just documented Go’s behavior to make sure I don’t break anything. Maybe add a test similar to this one and see what’s happening. :-?