US Time Zone Map
Click the map or use GPS to resolve the IANA time zone for any point, with a live local clock, UTC offset and daylight-saving status. Six US zone cards tick in real time.
Quick answer: Click anywhere in the US to see its time zone with a live clock. Coverage: US focused. No account is required.
Worked examples
- GPS near a boundary — A small location error can change the returned city, county or postal area when the point is close to a boundary. Verify the pin before using the answer for official paperwork.
- Postal vs administrative — Mailing cities, municipalities, counties and ZIP/postal areas are different geographic layers and can legitimately return different names.
- Indoor location — Browser geolocation may be less accurate indoors. If the result looks wrong, move the pin or search the address directly.
Limits & appropriate use
Every location stack has a competence boundary, and naming it is part of being trustworthy. OpenStreetMap's administrative coverage is excellent where mappers are active and thinner in rapidly changing or sparsely mapped regions; brand-new developments can lag, and disputed zones follow the community's de-facto consensus rather than arbitrating sovereignty. Postal layers add a second boundary: ZIPs and postcodes are delivery-routing systems, not geography, so PO boxes and carrier routes can legitimately disagree with the map. Indoor positioning adds a third: a browser fix can be a block off, which matters precisely at the borders where people ask these questions.
None of this makes the tools unsafe to use; it makes them safe to use *knowingly*. The design response is transparency: fields stay separate so layers never blur, empty answers are shown as empty rather than guessed, accuracy context travels with GPS results, and every page names its sources. For questions where the cost of being wrong is high — a property line, a legal filing, a medical dispatch — the escalation is always the same: licensed surveys, official registers and emergency services own those answers, and a good free tool points at the door instead of pretending to be it.
- Legal boundaries and property lines → licensed surveyor / county recorder.
- Mailing validity → the postal service's own address tools.
- Life-safety dispatch → official emergency services, never a map lookup.
Data & methodology
Positions are resolved with OpenStreetMap Nominatim/Photon (ODbL) and, for US districts, the Census Bureau geocoder. Nothing is stored server-side; the only outgoing request per lookup carries the coordinate pair itself.
For source details, licences and model limitations, see Data Sources and Methodology.
Related tools
Category: Location. Results are intended for everyday analysis and planning unless a page explicitly states otherwise.
How to use
- 1Click the map or press “Use my location”.
- 2Read the resolved IANA zone, live clock and UTC offset.
- 3Tap a zone card to inspect any US zone.
Frequently asked questions
How is the time zone determined?
Coordinates are looked up against an offline IANA time-zone boundary database — nothing is sent to a server.
What if I click on the ocean?
Time zones are defined for land areas, so you will get a note asking you to click on land instead.
Does it handle daylight saving?
Yes — the UTC offset and a DST status line are computed for the current date.
Which zones are on the cards?
Eastern, Central, Mountain, Pacific, Alaska and Hawaii-Aleutian — each with a live ticking clock.
Does it work outside the US?
Clicking anywhere resolves its zone, but the quick cards cover the six US zones.