reflog times don't use local time zone

[ceedubs]

Describe and demonstrate the bug

When viewing the reflog (global, project, or branch I believe), most of the times are given as relative values like "20 minutes ago", "9 days ago", etc, and those are just fine. But for a certain time window (I think that it might be between 24 hours and several days) it says something more like "Tuesday at 8:15 pm", and these timestamps seem to assume UTC instead of using the computer's configured timezone. I think that the relevant code might be prettyHumanReadableTime which uses defaultHumanTimeLocale without overriding the default utc timezone.

Additional context

I noticed this when the reflog suggested that I worked later than I did one evening...