Dates & Scheduling
Time Zone Converter
Enter a date and time once, pick the time zone it is written in, and see the same moment in every other zone you care about. Runs entirely in your browser.
Date & time to convert
Local time
IANA time zones such as America/New_York or Asia/Tokyo.
Daylight saving is applied automatically for the date you enter.
Converted times
liveHow it works
The date you type is read as wall-clock time in the selected source zone, converted
to a single UTC instant, then rendered back with the browser’s native
Intl time zone data for every zone in the list. Offset and
“next day” markers account for daylight saving automatically. Nothing is
uploaded and no external service is called.
Practical uses
Show the same moment in several IANA time zones, with daylight saving applied for the selected date.
Common ways to use it
- Check what a meeting time means for a colleague in another city.
- Turn a UTC timestamp from an API or log into wall-clock times.
- Compare a date's offset in two zones before scheduling something recurring.
09:00 in New York
Input
Date & time: 2024-01-31 09:00 Written in time zone: America/New_York
Output
America/New_York 2024-01-31 09:00 UTC-05:00 Europe/London 2024-01-31 14:00 UTC+00:00 Asia/Tokyo 2024-01-31 23:00 UTC+09:00 UTC instant: 2024-01-31T14:00:00.000Z
Verified with the tool's own conversion functions. The offset depends on the date: the same 09:00 on 2024-07-31 is 14:00 in London but 22:00 in Tokyo, because New York observes daylight saving and Japan does not.
Options that matter
- Written in time zone — the source zone the wall-clock time is written in.
- Target zones — add or remove any IANA zone; UTC and your local zone are included by default.
- Copy results / Download — take the whole converted table as text.
Things to keep in mind
- Offset and daylight-saving results use the IANA time-zone database bundled with your browser, so they can differ from an older or newer build.
- A wall-clock time that is skipped or repeated by a daylight-saving change is resolved to a single instant.
- Legacy abbreviations are not portable between browsers, so prefer full IANA names such as America/New_York.