Timezone Converter

How to use it

1. Pick the source time zone: it defaults to your browser's own zone.
2. Pick the target time zone; the list comes from the browser's IANA database with common zones on top.
3. Enter the date and time in the source zone (it starts at the current moment).
4. Both panels show the same instant: formatted local time, weekday, and the UTC offset such as UTC+08:00.
5. Use the swap button to exchange the two zones, or press Convert after editing.

Common use cases

• Remote meetings: finding a slot that is civilized in both zones.
• Flight and train plans: converting a local departure time to your home clock.
• Live streams and launches: publishing one moment in several zones.
• Support rotas: checking who is on shift when a ticket arrives.

Why it stays private

The conversion uses the time zone database built into your browser via the Intl API: no requests, no location detection beyond your own browser settings. Daylight saving transitions, including historical dates, come from that same IANA data.

FAQ

Q: How accurate is the daylight saving handling? A: It follows the IANA rules bundled with your browser, so past and scheduled future transitions are handled, including two-iteration resolution of ambiguous wall times at DST boundaries.

Q: Why does my zone list look different from someone else's? A: The full list is provided by the browser and can vary slightly with browser version and operating system updates; the twenty common zones at the top are fixed.

Q: Can I enter a time in the past or far future? A: Yes. Historical dates use the offset rules that were in effect then, and far-future dates use the currently scheduled rules, which can change if a zone redefines its DST policy.