Daylight saving time ends: clocks go back
The gist
Clocks in most of the US fall back an hour at 2 a.m. local time Sunday.
The change adds an hour of sleep but remains contested in Congress.
How it unfolded
- 1918The U.S. first adopted daylight saving time during World War I to conserve fuel, after Europe implemented its own time change, passing the Standard Time Act.
- 1919The law was repealed a year later.
- 1966The Uniform Time Act made daylight saving time standard across much of the U.S., with a specific opt-out option.