Daylight saving time, also referred to as daylight savings time, daylight time, or summer time, is the practice of advancing clocks to make better use of the longer daylight available during summer by
An ancient water clock that lets hour lengths vary with season
George Hudson was the first to propose modern DST, in 1895.
DST was first implemented in the United States to conserve energy during World War I (poster by United Cigar Stores).
Retailers generally favor DST; United Cigar Stores hailed a 1918 DST bill.
The Sunshine Protection Act is a proposed United States federal law that would make U.S. daylight saving time permanent, meaning the time would no longer change twice per year and would remain one hou
The Ohio Clock in the U.S. Capitol being turned forward for the first U.S. daylight saving time on March 31, 1918.