Complex sentence: Normally, Saturday prime time television in the United States begins at 8:00pm Eastern (ET)/Pacific (PT) and 7:00pm Central (CT)/Mountain (MT) and ends at 11:00pm ET/PT and 10:00pm CT/MT.
Split into simpler sentences: Normally, Saturday prime time television in the United States begins at 8:00pm Eastern (ET)/Pacific (PT) and 7:00pm Central (CT)/Mountain (MT). It ends at 11:00pm ET/PT and 10:00pm CT/MT.