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Time Zone Converter
Convert a date and time between time zones, including daylight saving changes. Choose the earlier or later occurrence when a local time repeats.
- Time in the destination zone
- 2026-10-02 05:00 America/New_York
- UTC instant
- 2026-10-02T09:00:00.000Z
- Source time ambiguity
- Unambiguous time
How the calculation works
The source local time is resolved to a UTC instant using the selected zone's rules for that date. The same instant is then displayed in the destination zone.
Inputs
- Date
- Local time
- Source zone
- Destination zone
- If the local time repeats
Calculation details
The date matters: the time difference between Moscow and New York changes with the season. Rules come from the browser or server's built-in time-zone data.
Some local times do not exist during the spring clock change; the calculator reports this. During the autumn change a time may occur twice; choose the intended occurrence.
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Updated: 2026-10-02