What time zone am I in?
Your time zone, UTC offset and daylight saving status, right away. Drag the day to see the same moment across every US zone.
Or tap anywhere on the map to see its time zone.
Time zone rules: the IANA time zone database, through your browser. Sun times are computed for the spot, to within a few minutes.
US time zones in four numbers
6
time zones in the 50 states
9 with the territories
2
states skip daylight saving
Hawaii and most of Arizona
2 AM
when clocks change
local time, on a Sunday
1 hr
between neighboring zones
in the 50 states
Where the time zone lines run
The US Department of Transportation sets the time zone boundaries, and it mostly draws them along state and county lines. That’s why a time zone question is often really a county question.
- More than a dozen states are split. Texas has El Paso on Mountain Time, the Florida Panhandle west of the Apalachicola River runs on Central, and Tennessee, Kentucky and Michigan’s Upper Peninsula are split too.
- Arizona is a patchwork in summer. The state stays on Mountain Standard Time, the Navajo Nation inside it switches to daylight time, and the Hopi Reservation inside the Navajo Nation doesn’t.
- Indiana changed late. Most of the state didn’t observe daylight saving time until 2006, and a few counties in its corners still run on Central.
Near a line, check the exact spot: tap it on the map above, or find what county you’re in, since most lines follow counties. To compare two places, try the distance between ZIP codes, which shows the time difference too.
Questions people actually ask
What time zone am I in?
The card at the top answers from your device clock the moment the page opens, with no permission needed. To check where you actually are, tap “Use my location”, or tap any spot on the map to see the time zone there.
How many time zones does the US have?
Six cover the 50 states: Eastern, Central, Mountain, Pacific, Alaska and Hawaii–Aleutian. With the territories there are nine, adding Atlantic (Puerto Rico and the US Virgin Islands), Samoa and Chamorro (Guam and the Northern Mariana Islands).
When does daylight saving time start and end?
In the US, clocks go forward one hour at 2:00 AM local time on the second Sunday in March and back one hour at 2:00 AM on the first Sunday in November. The card shows the exact date of the next change for your zone.
Which places don’t use daylight saving time?
Hawaii and most of Arizona stay on standard time all year, though the Navajo Nation in Arizona does change its clocks. Puerto Rico, the US Virgin Islands, Guam, the Northern Mariana Islands and American Samoa don’t change either.
What’s the difference between EST and EDT?
EST, Eastern Standard Time, is UTC−5 and runs from November to March. EDT, Eastern Daylight Time, is UTC−4 and runs from March to November. “Eastern Time” means whichever one is in effect. The same goes for CST and CDT, MST and MDT, PST and PDT.
Is Arizona on Mountain or Pacific time?
Arizona is on Mountain Standard Time (UTC−7) all year. From November to March that matches Denver; from March to November, when the rest of the West springs forward, Arizona’s clocks match Los Angeles instead. The Navajo Nation is the exception and does change its clocks.
What time zone is Indiana in?
Most of Indiana is on Eastern Time. Twelve counties, six in the northwest near Chicago and six in the southwest near Evansville, are on Central Time. The whole state has observed daylight saving time since 2006.
What is UTC?
Coordinated Universal Time, the reference clock time zones are measured from. Eastern Standard Time is UTC−5, so when it’s noon UTC it’s 7 AM in New York in winter, and 8 AM in summer, when New York is on UTC−4.
Why does my phone switch time zones near a border?
Phones set their zone from the cell network or their location. Close to a time zone line, a tower across the line can tip it over. If your clock jumps, set the zone by hand in your phone’s date and time settings.
Keep exploring
Updated 2026-11-10 · Where the data comes from