Time Zone Converter
Convert a specific date and time between any two time zones, and compare it across a grid of zones - daylight saving handled automatically.
Updated September 2026 · Written and verified by Akash Pandey
Time Zone Converter
How to use the time zone converter
- Choose the from time zone and the to time zone.
- Enter a date and time in the "from" zone.
- The converted time, offset and DST state appear instantly (the date flips if crossing midnight).
- The comparison grid adds up to four extra zones so you can spot a meeting window at a glance.
Frequently asked questions
How is the conversion done?
The browser's Intl API and its IANA timezone database compute the offset for the exact date and time you chose, including daylight saving transitions for both zones.
What happens around DST changes?
Offsets are resolved for your specific timestamp, so a date in winter converts with the winter offset even if the zone is in summer daylight time now.
Why might my converted time be off by an hour?
Only if the source offset is wrong - for example if the "from" zone in your list differs from where the person actually is. Otherwise the math is exact.
Can I compare more than two zones?
Yes - the comparison grid adds up to four additional zones, all converted to the same instant.
Does it work offline?
Yes. All time zone data ships with the browser; there are no network requests.
How does the converter handle differences across the International Date Line?
The tool displays date shifts (+1 day or -1 day) alongside the time so you never miss an international meeting date.
Can I pick any city in the world?
You can select from hundreds of major world cities and IANA time zones covering every continent.
Does this tool work across leap years and daylight saving changes?
Yes. It uses the browser built-in IANA timezone database, which accurately accounts for historical and current daylight saving rules.