Spring forward
In observing areas, at 2:00 a.m. local time on the second Sunday in March, clocks advance to 3:00 a.m. The hour from 2:00 to 2:59 does not occur.
The clock and the Sun
Daylight saving time
Daylight saving time moves the local clock forward by one hour for part of the year. It shifts daylight toward the evening by the clock; it does not create an extra hour of sunlight.
When do clocks change in the United States?
Fall back
At 2:00 a.m. local daylight time on the first Sunday in November, clocks return to 1:00 a.m. The hour from 1:00 to 1:59 repeats with a different UTC offset.
Where is daylight saving time not observed?
Hawaii and most of Arizona stay on standard time throughout the year. The Navajo Nation observes daylight saving time, including its Arizona territory. US territories including Puerto Rico, Guam, American Samoa, the US Virgin Islands and the Northern Mariana Islands do not observe it.
Why sunrise and sunset times shift
A city’s displayed sunrise and sunset can jump by about an hour on a clock-change date. The Sun’s motion is continuous: daylight duration still follows Earth’s tilt and orbit. Our city tables use each date’s local time zone offset, while day length is the elapsed time between the actual sunrise and sunset instants.
US daylight saving time in 2026
In 2026, the US changes took place on March 8 and November 1. See the 2026 dates and what happened at each transition →
Check local daylight
All five cities in this preview observe daylight saving time. Choose your city to compare local sunrise, sunset and twilight.
Source: NIST daylight saving time rules. Rules can change; this guide describes US rules checked November 2, 2026.