One instant, several local times
A Unix timestamp does not change when you choose another time zone. Only its calendar representation changes. Asia/Shanghai, America/New_York, and Europe/London are IANA zone identifiers whose historical and daylight-saving rules can differ by date.
Offsets are not time zones
An offset such as UTC-05:00 describes one difference from UTC. It does not contain future daylight-saving rules or a geographic identity. Use a named zone when those rules matter.
How to use this tool
Enter an epoch integer, choose its unit and select the destination city or IANA zone. Press Convert to display that known instant under the selected regional rules. The timestamp itself is unchanged; only its date and clock presentation changes.
Worked input and output
| Input or setting | Expected result |
|---|---|
1700000000 · s · UTC | 2023-11-14 22:13:20 |
1700000000 · s · Asia/Shanghai | 2023-11-15 06:13:20 |
1700000000 · s · America/New_York | 2023-11-14 17:13:20 · UTC−05:00 |
Checks before using the result
The selected-zone result includes its offset for the converted date. Los Angeles is not permanently UTC−08:00, and New York is not permanently UTC−05:00. Check the calendar day as well as the clock. If your input is a local date instead of an epoch integer, use the two-zone time converter so the source zone is interpreted correctly.