Every year, Americans in most states switch their clocks twice — once in spring and again in fall. Now, 19 states have enacted laws that could end the practice, but they are waiting for Congress to act.
Daylight saving time (DST), which moves clocks forward by one hour for part of the year, has a long history in the US. The country first adopted daylight saving time during World War I, and the current federal framework governing the practice dates to the Uniform Time Act of 1966. The country also experimented with year-round daylight saving time in 1974 during an energy crisis, but the unpopular measure was repealed later that year.
