"all in the family" first season aired at 9:30 pm because more famous shows were aired at 8:00 pm. when a show is "aired" it means it is on television at that time. when the show started to be famous, cbs moved the show to 8:00 pm because more people would watch at that time. cbs moved the show to 9:00 pm but put the show back to 8:00 in the last season.