It's that time again. Remember to change your clocks back an hour as Daylight Saving Time officially comes to an end. The clocks roll back by one hour at 2:00 a.m. on Sunday, November 3. Few people will move the clock hand, or dial, back an hour exactly at 2:00 a.m. local time. But that's when Daylight Saving Time officially ends. During the time change, the National Fire Protection Association and the U.S. Consumer Product Safety Commission recommend that consumers change the battery in smoke and carbon monoxide detectors.