Daylight saving time in the United States ends at 2 a.m. on November 2, 2025. Clocks must be set back one hour during the early Sunday morning transition. The change follows federal law and affects most of the country.
The shift provides an extra hour of sleep for residents. Sunrise and sunset occur one hour earlier after the adjustment. Most states participate in the annual practice.
- Daylight saving time runs from March to November each year.
- The goal is to align daylight with peak activity hours.
- Exceptions include Hawaii and most of Arizona.
Clock adjustment process
The change happens precisely at 2 a.m. local time. Manual devices like wall clocks require hand adjustment.
Digital equipment updates through network signals. Check vehicles and alarms to prevent scheduling issues.
Exempt regions
Hawaii and territories such as Puerto Rico do not observe daylight saving time. Most of Arizona maintains standard time year-round.
These areas avoid changes to preserve local consistency. Remaining states follow the federal schedule.
Historical background
The practice began in the US in 1918 during World War I. The Uniform Time Act of 1966 standardized national dates.
European countries adopted similar systems in the 20th century. The current duration spans eight months annually.
Energy savings data
Federal studies show a 0.03% reduction in annual electricity use. Evening peak demand decreases with extended daylight.
The Department of Transportation tracks impacts. Benefits include reduced artificial lighting needs.
Seasonal daylight changes
Winter solstice arrives December 21 with the shortest day of the year. In New York, daylight lasts about nine hours.
Short days continue until June when summer solstice marks the opposite extreme. Earth’s tilt creates these variations.
Daylight saving time coordinates clock time with solar cycles in warm seasons. The system remains under congressional review.
Next cycle start
Daylight saving time resumes at 2 a.m. on March 9, 2026. Clocks move forward one hour on the second Sunday in March.
Proposals to make it permanent have circulated since 2022. The Sunshine Protection Act aims to eliminate biannual changes.
Daily routine impacts
Air and ground transportation adjust schedules automatically. Schools and businesses prepare transitions to minimize confusion.
The extra hour aids sleep but reduces evening light. Personal adjustments ensure daily accuracy.
Federal law governs observance in 48 states. Island territories maintain geographic exceptions.