Time zone in briefThe fifty states use six main zones: Eastern, Central, Mountain, Pacific, Alaska and Hawaii-Aleutian.

Time zones and UTC offsets

The fifty states use six main zones: Eastern, Central, Mountain, Pacific, Alaska and Hawaii-Aleutian.

PacificUTC−8 / UTC−7

Los Angeles, San Francisco, Seattle

MountainUTC−7 / UTC−6

Denver, Salt Lake City, Phoenix

CentralUTC−6 / UTC−5

Chicago, Dallas, New Orleans

EasternUTC−5 / UTC−4

New York, Washington, Miami

AlaskaUTC−9 / UTC−8

Anchorage

Hawaii–AleutianUTC−10 / UTC−9

Honolulu

Map of the United States showing six main time zones and representative cities
The six main zones across the fifty states, with separate Alaska and Hawaii insets; offsets show standard and daylight time.

Daylight saving: annual rule and exceptions

Most of the United States observes seasonal clock changes. In 2026 daylight saving runs from 8 March to 1 November; Hawaii and most of Arizona remain major exceptions.

Displayed times are calculated by the browser with IANA identifiers; live values are not included in structured data.

Frequently asked questions about time zones and daylight saving

How many main time zones do the USA use?

The fifty states use six main zones: Eastern, Central, Mountain, Pacific, Alaska and Hawaii-Aleutian.

Do all states observe daylight saving?

Most states change their clocks, while Hawaii and most of Arizona do not; the Navajo Nation in Arizona does observe daylight saving.

When do clocks change in the USA?

Where daylight saving is observed, clocks move forward on the second Sunday in March and back on the first Sunday in November.

Official reference