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Timezones

Timezones and time changes in the United States

There are several timezones in the United States. Countries with a large distance from West to East are often devided into two or more timezones to adjust daytimes to the position of the sun. Timezones are always computed relatively to UTC, the "Universal Time Coordinated".

In the United States exists a time difference of up to 5 hours between the East and the West. Like in most parts of the USA, there is a distinction in the United States drawn between standard time and daylight saving time (also called winter time and summer time), but this distiction is not nationwide. 8 regions put the clocks forward by 1 hour in summer. 2 regions keep the standard time year-round.

The next clock change in New York will be on November 07th, 2021 at 2:00 to standard time.


Back to overview: United States

Timezones by region

RegionUTCStandard timeDaylight saving time
Adak-10Hawaii Standard Time (HST)Hawaii Daylight Time (HDT)
Anchorage-9Alaska Standard Time (AKST)Alaska Daylight Time (AKDT)
Chicago-6Central Standard Time (CST)Central Daylight Time (CDT)
Denver-7Mountain Standard Time (MST)Mountain Daylight Time (MDT)
Detroit-5Eastern Standard Time (EST)Eastern Daylight Time (EDT)
Los Angeles-8Pacific Standard Time (PST)Pacific Daylight Time (PDT)
Menominee-6Central Standard Time (CST)Central Daylight Time (CDT)
New York-5Eastern Standard Time (EST)Eastern Daylight Time (EDT)
Phoenix-7Mountain Standard Time (MST)discontinued 1967
Honolulu-10Hawaii Standard Time (HST)discontinued 1945

Timezones

The next clock changes in New York

DateLocal timeChange
Mar 14, 20212:00 am+1 hour to daylight saving time
Nov 07, 20212:00 am-1 hour to standard time
Mar 13, 20222:00 am+1 hour to daylight saving time
Nov 06, 20222:00 am-1 hour to standard time
Mar 12, 20232:00 am+1 hour to daylight saving time
Nov 05, 20232:00 am-1 hour to standard time
Mar 10, 20242:00 am+1 hour to daylight saving time
Nov 03, 20242:00 am-1 hour to standard time
Mar 09, 20252:00 am+1 hour to daylight saving time



Changes in Daylight Saving Times

In Phoenix Daylight Saving Time has been observed since 1918 until 10/29/1967.
In Honolulu Daylight Saving Time has been observed since 1933 until 09/30/1945.

› All countries with Daylight Saving Time

United States: Sunrise + sunsetSunrise and sunset in the United StatesTimes of sunrise and sunset for the most important cities in the United States and the avg. length of daylight per month
Countries with DSTAll Countries with DSTA summary of all countries which currently observe Daylight Saving Time with further info on introductions and upcoming changes.
United States: Public HolidaysPublic holidays in the United States 2021-2025Statutory and inofficial holidays in the United States for 2021 to 2025