Daylight saving 2025 ends this weekend! The time change will fall back an hour for participating U.S. states. Here's when to turn your clocks for DST.

The practice of falling back in the U.S. started in 1918 during World War I as a way to conserve fuel. By moving the clocks ahead an hour, backers believed the country could divert a bit of coal-fired electricity to the military instead of using it for an hour of home power. It was reenacted in World War II.