time zone: Quick Facts

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The Information Architects of Encyclopaedia Britannica

Last updated

Nov. 1, 2026

News •

Daylight saving time 2026: It's time to change your clocks this Sunday (Nov. 1) • Oct. 26, 2026, 11:42 AM ET (Live Science)

When does daylight savings time change fall back? Not this weekend. Try November • Oct. 16, 2026, 9:19 AM ET (Indianapolis Star)

Photos

World map showing standard time zones, with each zone shaded and labeled by its offset from Greenwich Mean Time. The International Date Line is marked with a bold, zigzagging line in the Pacific Ocean, and variations for half-hour and other non-standard offsets are indicated. Continents, major countries, and oceans are labeled for reference.

Map centered on New York, showing major international flight paths to cities such as London, Rome, Delhi, Sydney, Tokyo, and Honolulu. Arrows indicate the direction of travel, with numbers around the edge representing time zones crossed. A scale at the bottom explains that crossing one time zone equates to approximately one day of jet lag, with days of jet lag increasing as more time zones are crossed.

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Topics

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