Galactic Standard Time is an in-character "time zone" used to schedule events. It is equivalent to Universal Coordinated Time (UTC).
Therefore:
PST == GST - 8
PDT/MST == GST - 7
MDT/CST == GST - 6
CDT/EST == GST - 5
EDT == GST - 4
UTC == GST
Also note that Star Conquest runs on real time. An hour is an hour, a week is a week, and so forth. Also, the dates are assumed to be the same, and only the year changes in-game. This probably isn't accurate, but we can all simply agree to assume that some calendar adjustments will be made in the future.
