Losing an hour of sleep as daylight saving time kicks in can do more than leave you tired and cranky the next day — it also could harm your health.

Losing an hour of sleep as daylight saving time kicks in can do more than leave you tired and cranky the next day, it also could harm your health.

At 2 a.m., clocks in most parts of the United States will spring forward one hour as daylight saving time begins.

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.

Federal law permits states to opt out of Daylight Saving, but does not allow them to observe it year-round. Other than Arizona

Daylight saving time starts Sunday, despite sleep experts (and the president) hoping to eliminate time changes.

It's once again time to spring forward this weekend as millions of Americans will change their clocks and get that extra hour of sunlight in the evenings.

Daylight saving time is forcing a lot of people to move their clocks forward by an hour. But people who live here won't have to observe the biannual practice