Clocks across most of the United States will be set back one hour on November 2, 2025, marking the end of daylight saving time. The change occurs at 2 a.m. local time, shifting to 1 a.m., affecting millions of Americans returning to standard time. This practice aims to optimize the use of natural daylight throughout the year.
Daylight saving time began on March 9, 2025, with clocks moving forward. Regions like Hawaii and most of Arizona do not participate in the change. Territories such as Puerto Rico and Guam also maintain standard time year-round.
This year’s date is the second-earliest possible Sunday for the adjustment, due to the calendar.
Date and adjustment mechanism
Digital devices typically update automatically. Analog clocks require manual adjustment before Saturday night.
The transition provides an extra hour of sleep but results in earlier sunsets.
Regions exempt from the change
Hawaii opts for standard time due to minimal daylight variation yearly. In Arizona, only the Navajo Nation follows daylight saving time.
These exceptions avoid local disruptions in daily activities.
U.S. territories in the Pacific and Caribbean do not adopt the system.
Legislative efforts for change
Proposals like the Sunshine Protection Act aim to make daylight saving time permanent. The bill passed the Senate in 2022 but stalled in the House.
In 2025, it was reintroduced with bipartisan support, including 45 co-sponsors. States like Florida and Texas push for changes through local legislation, pending federal approval.
About 30 states discuss ending biannual clock changes, with some proposing year-round DST if neighbors agree. Critics cite health risks, like sleep disorders and cardiovascular issues, while supporters highlight economic benefits in retail and tourism. The Department of Transportation has regulated the practice federally since 1966.
Historical origin of the practice
The concept emerged in 1784 with Benjamin Franklin, as a satirical suggestion to save candles. Implemented in Germany in 1916 during World War I, the U.S. adopted it in 1918 to conserve energy.
Repealed after the war, it returned during World War II with continuous use. The Uniform Time Act of 1966 standardized national dates.
In 2005, Congress extended the period from March to November, aiming for greater energy savings.
- The practice lasts eight months, against four of standard time.
- Department of Energy studies show marginal savings below 0.5% in total consumption.
- In warmer regions, air conditioning may increase electricity use at night.
Regional impacts vary
In northern areas, the end of daylight saving time worsens long winter nights, with the solstice on December 21 bringing about nine hours of daylight. Equatorial regions feel less impact due to stable daylight hours.
In the South, the adjustment may increase energy use due to prolonged cooling at night.
The Navajo Nation in Arizona follows DST to align with neighboring states for trade and transport.
