Overview

• Daylight Saving Time ends in the United States at 2 a.m. local time on Nov. 2, when clocks revert to 1 a.m.
• The United Kingdom returns from British Summer Time to Greenwich Mean Time at 2 a.m. on Oct. 26.
• According to the National Institute of Standards and Technology, moving from daylight saving to standard time shifts one hour of daylight from evening to morning.
• The current U.S. schedule—second Sunday in March to first Sunday in November—has been in place since 2007 under the Energy Policy Act of 2005.
• Most phones and computers update automatically, but analog and appliance clocks may need manual changes, and officials recommend replacing smoke and carbon monoxide detector batteries during the time-change weekend.