Time Zone Converter

What is Time Zone Converter?

The Time Zone Converter is a free online tool that takes one date and time in a chosen source zone and shows that same moment across any set of IANA time zones at once, each labeled with its current UTC offset. It is built for remote teams, schedulers, travelers, and developers who need to coordinate meetings or deadlines across regions like New York, London, Tokyo, Seoul, and UTC. Daylight saving transitions are computed automatically, and a live world clock ticks once per second for every zone you add. Whether you want a timezone converter, a world clock, UTC to local time, or a meeting time across time zones, this widget computes the same instant everywhere and lets you copy the whole result for sharing.

How to use Time Zone Converter

1. Set the Source time using the date-and-time picker (or click Now to load the current moment and your detected local zone).
2. Choose the Source zone from the IANA time zone dropdown that the entered time belongs to.
3. Review the Converted times list, where each target zone shows the matching local time and its current UTC offset.
4. Pick a zone from the Add zone dropdown and click Add to include more target zones; click Remove on any row to drop it.
5. Click the copy button in the Converted times header to copy every zone result as text.
6. Watch the live World clock track all your selected zones, updating once per second; click Reset to restore the default zone set.

Examples

Frequently asked questions

Which time zones are supported?

It uses the full IANA time zone database from your browser via Intl.supportedValuesOf, so hundreds of zones like America/New_York, Europe/London, Asia/Seoul and UTC are available. If your browser does not support that API, a built-in fallback list of common zones is used instead.

Does it handle daylight saving time correctly?

Yes. The converter computes each zone actual offset for the specific moment you enter, so DST transitions are applied automatically. Right at the exact instant a DST change happens, tiny edge-case differences are possible, but normal times convert accurately.

What does the live World clock show?

It displays the current real-world time in every target zone you have added and updates once per second, so you always see the up-to-date local time for each region you are tracking.

Can I add or remove target zones?

Yes. Use the Add zone dropdown and Add button to include any zone not already listed, click Remove on a row to drop it, and use Reset to restore the default target set of UTC, New York, London, Tokyo and Seoul.

Is my data uploaded anywhere?

No. Everything runs 100% client-side in your browser using the built-in JavaScript Intl date APIs. No times, zones, or inputs are ever sent to a server. There is no upload and no network request, so your data stays private on your device.