Mordecai and Rigby have to change the clocks in the park for Daylight Savings Time. But they decide to prank Benson with it by changing the clocks to the wrong time.
Benson is mad for Mordecai and Rigby arriving an hour late to the morning schedule. Feeling the scolding was uncalled for, Mordecai and Rigby prank Benson by switching the clocks back 3 hours. Mordecai and Rigby change the park's time-zone.