How it works
The entered wall time is interpreted in the selected source zone, then the same instant is formatted for the target zone.
Results use the selected source and target zone formats.
Convert time zones.
Convert a date and time between popular time zones using the browser Intl API.
Practical examples
- Compare meeting times between Berlin and New York.
- Convert a local date-time to UTC.
- Copy formatted time-zone results for scheduling.
How to read the result
- The entered wall time is interpreted in the selected source zone.
- Formatting uses the browser Intl API.
- The same instant is displayed in the source zone, target zone, and UTC.
Limits and privacy notes
- The zone list is intentionally focused on common zones.
- DST rules come from the browser runtime.
- Date-time values are processed locally in your browser.
Wall time matters
- The input is interpreted in the selected source zone.
- Target output shows the equivalent instant.
- UTC reference helps verify handoffs.
Meeting-safe checks
- Compare source and target before sending invites.
- Daylight-saving offsets follow the browser's time-zone database.
- Use full date output around midnight.
Focused zone list
- The list covers common zones.
- Not every IANA zone is included.
- Keep final calendar invites authoritative.