In 2027 US clocks spring forward on March 14 and fall back on November 7; the EU/UK change on March 28 and October 31. The two regions never switch on the same weekend.
In the United States and Canada, daylight saving time in 2027 begins on Sunday, March 14, when clocks jump from 2:00 to 3:00 AM, and ends on Sunday, November 7, when they fall back. The US rule is always the second Sunday of March to the first Sunday of November.
The United Kingdom and the European Union follow a different formula — the last Sunday of March to the last Sunday of October. In 2027 that means clocks go forward on Sunday, March 28 and back on Sunday, October 31. (In 2026, Europe’s clocks return to standard time on October 25, a week before America’s November 1.)
Those mismatched weekends create two odd windows each year when the transatlantic gap shifts: for two weeks in spring and one in autumn, New York and London sit only four hours apart instead of the usual five. Recurring international meetings scheduled by local time quietly move for one side during those windows — a classic source of missed calls.
Large parts of the world skip the ritual entirely: most of Asia and Africa, plus Arizona and Hawaii, never change clocks, and Mexico and Brazil abolished DST in recent years. The world clocks at itsdately.com apply every region’s current rules automatically, so the displayed gap between any two cities is always the real one.
Frequently asked questions
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Further reading: U.S. DOT — Uniform Time