Daylight Saving Time 2012 Begins March 11, 2012--This weekend starts daylight savings time for 2012. Before you go to bed on Saturday night, reset your clocks one hour forward! This is a good time to change the batteries in Smoke Alarms and Carbon Monoxide Detectors! It's a message that's repeated twice a year, and that's because it's important for people to realize that this simple step takes just a few minutes and it saves lives!! Daylight Savings Time Ends on November 4, 2012 and the clocks will need to go back an hour.