(CNN) — Here’s a look at Daylight Saving Time, a system to reduce electricity usage by extending daylight hours.

Facts

Sunday, March 9, 2025 - Daylight Saving Time begins at 2am. Set clocks ahead one hour.

Sunday, November 2, 2025 - Daylight Saving Time ends at 2am. Set clocks back one hour.

It is “Daylight Saving Time” (singular), not “Daylight Savings Time” (plural).

Beginning in 2007, Daylight Saving Time starts in the United States on the second Sunday in March and ends on the first Sunday in November.

READ MORE - Daylight saving time: Myths and truths

Timeline

1784 - The idea of daylight saving is first conceived by Benjamin Franklin.

1914-1918 - Britain goes on DLS during World War I.

March 19, 1918 - The Standard Time Act establishes time zones and daylight saving

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