Daylight Savings Time ends tonight. "Fall back" by setting your clock back one hour.
The current DST federal policy was enacted in 1966, as the Uniform Time Act.\
The DST period in the U.S. begins each year on the second Sunday in March, when clocks are set forward by one hour. They are turned back again to standard time on the first Sunday in November as DST ends.
Federal law allows a state to exempt itself from observing daylight saving time, upon action by the state legislature to do so, but does not allow the permanent observance of DST.