A handy time zone converter.
You need Ruby. This is developed on 1.9.2, but it should work on 1.8.7.
It depends on
Then, just add the
timezone file to your path.
Convert a time from one zone to another.
$ timezone 4:30 MST PDT 3:30 $ timezone 3:30 PDT MST 4:30
The to time zone defaults to your system's current time zone.
$ timezone 3:30 PDT 4:30