What time is it in area code 340?
Area code 340 is in the Atlantic time zone: UTC−4 all year, because U.S. Virgin Islands does not change its clocks. It stays on AST (UTC−4) through the year, so the gap to places that do change their clocks shifts by an hour twice a year. When it is 9 am in 340, it is 8 am Eastern, 7 am Central, 6 am Mountain and 5 am Pacific – so the working day here starts while the west coast is still asleep. The code's largest rate centers are CHTAMSTTHS, ST CROIX and CHNSTDSTCR, as NANPA abbreviates them.
Clocks run in your browser from the IANA time zone database, so they stay right between page rebuilds.
Offsets and clock changes
| Zone | Standard | Daylight saving | Changes in 2026 |
|---|---|---|---|
| Atlantic | AST UTC−4 | not observed | none |
Questions about 340 and time
What time is it in area code 340?
The clock above shows it live. 340 keeps Atlantic time, UTC−4 in winter and the same all year.
Does area code 340 observe daylight saving time?
No. U.S. Virgin Islands stays on AST all year.
Is 340 the same time as New York?
No. New York is Eastern time; 340 is Atlantic (UTC−4 against UTC in winter), so work out the difference from the clock above rather than assuming.
Why does a 340 caller reach me at an odd hour?
Two common reasons. Either the clocks differ by more than you expected – the offset changes twice a year and not everywhere on the same date – or the caller ID is not really 340 at all. Spam callers fake a local-looking number, so the displayed code says nothing about where the call came from.
Sources
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- IANA Time Zone Database (tzdata), as shipped with this build, retrieved Nov 1, 2026