Daylight saving time is the period between the second Sunday of March and the first Sunday of November when clocks for most states in the U.S. shift back for one hour.

It's almost daylight saving time, where we all turn the hands of our clocks forward one hour. Daylight saving didn't become federal law until 1966, with passage of the Uniform Time Act . It established daylight saving time from the last Sunday of April through the last Sunday of October.

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