Daylight Saving Time Calculator

Daylight saving time begins on the second Sunday of March at 2:00 AM, when clocks spring forward to 3:00 AM and you lose an hour. It ends on the first Sunday of November at 2:00 AM, when clocks fall back to 1:00 AM and you gain an hour. This federal schedule has applied every year since 2007.

It checks the weekday of the first of the month, then counts forward to the right Sunday: the second Sunday of March for spring forward and the first Sunday of November for fall back. For example, March 1, 2026 is a Sunday, so the second Sunday is March 8. The two changes always land on a Sunday.

In March the clocks move forward one hour (spring forward), so 2:00 AM becomes 3:00 AM and you lose an hour of sleep. In November the clocks move back one hour (fall back), so 2:00 AM becomes 1:00 AM and you gain an hour. The calculator labels each change and shows the direction.

The calculator models each 2:00 AM change in a single fixed time reference so the result stays consistent on any device. The day count is exact, but the hours figure can differ from your local 2:00 AM by your own time zone offset, which is at most a few hours. For planning around a clock change, the day count is the number that matters most.

Hawaii and most of Arizona stay on standard time all year, so their clocks never change. US territories such as Puerto Rico, Guam, and the US Virgin Islands also skip it. Everywhere else on this schedule follows the second Sunday of March and first Sunday of November rule.

Possibly. Congress has debated making daylight saving time permanent (for example, the proposed Sunshine Protection Act), which would end the twice yearly clock change. Until any such law takes effect, the calculator uses the current rule that has been in place since 2007, so double check future years if the law later changes.