Daylight Saving Time began today at 2 a.m. All clocks should have been advanced one hour.
Daylight Saving Time was instituted in the U.S. during World War I and World War II to save energy. It was extended by four weeks in 2007. It ends the first Sunday in November.
While you're switching your clocks, don't forget to change the batteries in your home's smoke and carbon monoxide detectors.