Daylight saving time (DST) is a practice of advancing clocks during warmer months so that evenings have more daylight and mornings have less. In the United States, DST begins on the second Sunday of March and ends on the first Sunday of November. In 2025, DST will begin on March 9 and end on November 2.
DST has been shown to have a number of benefits, including reducing energy consumption, decreasing traffic accidents, and improving public safety. A study by the U.S. Department of Energy found that DST saves approximately 1% of electricity nationwide. Another study by the National Highway Traffic Safety Administration found that DST is associated with a 5% reduction in traffic fatalities. DST can also improve public safety by making it easier to see pedestrians and cyclists at night.
