Time in the United States

The United States spans 7 time zones: Eastern Time in New York (UTC-5, UTC-4 in summer); Central Time in Chicago (UTC-6, UTC-5 in summer); Mountain Time in Denver (UTC-7, UTC-6 in summer); Mountain Standard Time in Phoenix (UTC-7); Pacific Time in Los Angeles (UTC-8, UTC-7 in summer); Alaska Time in Anchorage (UTC-9, UTC-8 in summer); Hawaii-Aleutian Standard Time in Honolulu (UTC-10).

Parts of it do. Eastern Time (New York) changes clocks: Eastern Standard Time (UTC-5) as standard time and Eastern Daylight Time (UTC-4) from 8 March to 1 November 2026. Central Time (Chicago) changes clocks: Central Standard Time (UTC-6) as standard time and Central Daylight Time (UTC-5) from 8 March to 1 November 2026. Mountain Time (Denver) changes clocks: Mountain Standard Time (UTC-7) as standard time and Mountain Daylight Time (UTC-6) from 8 March to 1 November 2026. Mountain Standard Time (Phoenix) keeps the same time all year. Pacific Time (Los Angeles) changes clocks: Pacific Standard Time (UTC-8) as standard time and Pacific Daylight Time (UTC-7) from 8 March to 1 November 2026. Alaska Time (Anchorage) changes clocks: Alaska Standard Time (UTC-9) as standard time and Alaska Daylight Time (UTC-8) from 8 March to 1 November 2026. Hawaii-Aleutian Standard Time (Honolulu) keeps the same time all year.

Eastern Time (New York) is 5 hours behind London for most of the year (4 hours for 28 days, while the two change their clocks on different dates).