Greenwich Mean TIme is 5 hours ahead of us here Eastern Standard Time, so my program, Thursday, Sept. 5, 6:30-7:30 PM, EDT, is 4 hours later than GMT, so it would run at 22:30-23:30 hours GMT, changing back to EST later this month, meaning it will be at 23:30-00:30 Friday for the reast of the year.