There will be an extra hour for Halloween fun this weekend with Daylight Saving Time ending early Sunday morning. Or that may be an extra hour of sleep. Clocks will move back an hour at 2 a.m. Sunday. Daylight Saving Time runs each year from the second Sunday in March to the first Sunday in November. In addition to adjusting your clocks, remember to check and change out the batteries in smoke alarms and carbon monoxide detectors.