🇺🇸 Time Zones in United States
The United States spans six time zones across its 50 states and territories. From New York's Eastern Time to Hawaii's HST, the country covers 6 hours of time difference. The US is one of the few large countries where DST is widely observed — but not universal. Arizona stays on Mountain Standard Time year-round, and Hawaii doesn't observe DST at all.
Time Zone Overview
| Time Zone(s) | UTC Offset | DST |
|---|---|---|
| Eastern (EST/EDT), Central (CST/CDT), Mountain (MST/MDT), Pacific (PST/PDT), Alaska (AKST/AKDT), Hawaii (HST) | See details above | Most of the US observes DST from the second Sunday in March to the first Sunday in November. Hawaii and most of Arizona do not observe DST. |
Major Cities in United States
Click any city to see the current local time:
Quick Facts
- Number of time zones: 6
- Daylight saving: Most of the US observes DST from the second Sunday in March to the first Sunday in November. Hawaii and most of Arizona do not observe DST.
Frequently Asked Questions
How many time zones does United States have?
United States has 6 time zone(s): Eastern (EST/EDT), Central (CST/CDT), Mountain (MST/MDT), Pacific (PST/PDT), Alaska (AKST/AKDT), Hawaii (HST).
Does United States observe daylight saving time?
Most of the US observes DST from the second Sunday in March to the first Sunday in November. Hawaii and most of Arizona do not observe DST.
Time in Daily Life
The US spans six time zones from Hawaii to the East Coast, and most states observe daylight saving, though Arizona and Hawaii do not, so a call from New York to Phoenix can cross three hours in summer.
Business hours in New York and Los Angeles typically run 09:00 to 17:00, but the coast-to-coast gap means a national meeting must pick a slot that suits both an early eastern morning and a later western one.
Summer evenings on the East Coast stay light past 20:30, while winter darkness in the north arrives before 16:30, shaping how people schedule outdoor plans.
The Thanksgiving-to-New-Year stretch is the main family travel season, and the summer's long weekends like the Fourth of July pull millions toward beaches, parks, and roads.