Time Zone Converter
Convert a date and time from one IANA time zone to up to five target zones simultaneously. Choose the source zone, type the wall-clock time and instantly see it in UTC, London, New York, Tokyo, Sydney and dozens more. Daylight Saving Time is handled natively by your browser’s Intl engine — no stale timezone database required.
How to use
- 1
Pick the source zone
Select the time zone in which your input wall-clock time should be interpreted. Defaults to your browser’s local zone.
- 2
Enter the date & time
Use the datetime-local input, or click “Use now” to live-track the current time in every zone (refreshes every 30 seconds).
- 3
Read the converted times
Each target card shows the converted wall-clock time, the UTC offset and the offset difference versus the source zone.
- 4
Customise target zones
Each target has its own dropdown — pick any of the 50+ zones grouped by region to build your personal world-clock panel.
Common use cases
- Schedule a Zoom call across teams in San Francisco, London and Bangalore.
- Find a flight arrival time in your destination’s local zone.
- Track live “now” across remote teams during a global rollout.
- Avoid calling a colleague at 3am by checking their local time first.
Limitations
- The available time zones and DST rules come from your browser’s ICU library. The results match your operating system’s tzdata — keep it updated for accuracy.
- The “Use now” live mode refreshes every 30 seconds, not every second, to limit background work. Switch it off for an exact snapshot.
- Offset labels reflect standard or daylight time depending on the chosen instant. The difference shown versus the source zone is the offset gap at that moment, not a fixed hour count.
- We do not support historical or pre-1970 timestamps — the Intl engine’s tzdata is authoritative only for the modern era.
Frequently asked questions
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