Timezones

The timezones 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 March 14th, 2021 at 2:00 to daylight saving time.


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Timezones by region

RegionTimezoneDaylight saving timeUTC
AdakHawaii Standard Time (HST)Hawaii Daylight Time (HDT)-10
AnchorageAlaska Standard Time (AKST)Alaska Daylight Time (AKDT)-9
ChicagoCentral Standard Time (CST)Central Daylight Time (CDT)-6
DenverMountain Standard Time (MST)Mountain Daylight Time (MDT)-7
DetroitEastern Standard Time (EST)Eastern Daylight Time (EDT)-5
Los AngelesPacific Standard Time (PST)Pacific Daylight Time (PDT)-8
MenomineeCentral Standard Time (CST)Central Daylight Time (CDT)-6
New YorkEastern Standard Time (EST)Eastern Daylight Time (EDT)-5
PhoenixMountain Standard Time (MST)discontinued 1967-7
HonoluluHawaii Standard Time (HST)discontinued 1945-10


The next clock changes in New York

DateLocal timeChange
Nov 01, 20202:00 am-1 hour to standard time
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



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