Automatic time zone translation is moronic if you don’t indicate that automatic translation has happened before displaying it to the user.

Also, assuming that the time zone set on the client machine is the same that the reader expects is usually true, but not always.

There’s a reason most technical or “professional” communication of time zones happens in UTC, and the conversion is left up to the reader.

This is one of those UI conventions that would be good, but is actually unusable and ruined because there's too much other bad UIs that don't even think about time zones.

I wish people would just also always publish GMT - timezones are the freaking worst.