Daylight Saving Time for 2025 begins in most parts of the United States at 2 a.m. on Sunday, with Americans losing an hour of sleep but gaining one of daylight.

Your manual clocks (most microwaves, ovens, car radios, bedside alarm clocks), will need to be adjusted one hour forward.

Most of America “springs forward” Sunday for daylight saving time and losing that hour of sleep can do more than leave you tired and cranky the next day. It also could harm your health. Darker mornings and more evening light together knock your body clock out of whack — which means daylight saving time can usher in sleep trouble for weeks or longer.