Time Zone Converter
Convert a date and time between time zones correctly, including daylight saving time.
Click a region on the map
Click a region to see the time zones there, similar to the world-map timezone picker in the Ubuntu/Debian installer.
World clocks
How to use this tool
Pick a date and time, choose the time zone it's in, and choose the time zone you want to convert it to. The result updates instantly and correctly accounts for daylight saving time.
About this conversion
Uses your browser's built-in Intl time zone database (the IANA tz database) rather than hand-coded offset rules, so historical and current daylight saving time transitions are handled correctly for each zone.
Frequently asked questions
Does this handle daylight saving time correctly?
Yes. This tool uses your browser's built-in Intl time zone database (the same IANA tz database used across the web platform) rather than hand-coded rules, so it correctly accounts for daylight saving time transitions and each region's specific rules and history.
Why are time zones named after cities instead of abbreviations like EST or GMT+3?
Abbreviations like EST are ambiguous (several zones share them) and don't capture daylight saving rules. IANA names like "America/New_York" identify a specific region with a complete history of offset and DST rules, so the conversion is unambiguous.