Timezone Converter
Convert a time between any two IANA timezones.
Pick a source timezone, a target timezone, and a date. We handle daylight saving transitions automatically using your browser's IANA tz database.
In America/New_York
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How to use it
Pick a source timezone
Choose the timezone you're starting from. IANA names like Europe/Paris or Asia/Tokyo work; we expose dozens of common ones.
Pick a target timezone
Choose where you want the converted time. Daylight-saving rules for both zones are applied automatically.
Pick a date and time
Default is now. Change the date to see the converted time on a specific day - including across DST boundaries.
What is it?
A timezone converter translates a date and time from one IANA timezone (e.g. America/New_York) to another (e.g. Asia/Tokyo), automatically applying daylight saving transitions. The arithmetic isn't 'add 14 hours' because the offset between zones changes twice a year - and the dates of those changes differ between countries. Our converter uses the browser's bundled IANA tz database, which is the same data Linux, macOS and Postgres use.
When to use it
Coordinating meetings across continents, scheduling product launches, debugging server logs (which are usually in UTC) against local user reports, converting flight times across hubs, or simply checking 'what time is it in Mumbai right now?' Also useful for journalists translating press-release embargoes and for finance teams aligning market open/close.
Common mistakes
Treating EST and EDT as separate, manually-tracked zones; they're the same physical region and the IANA name (America/New_York) covers both. Forgetting that some countries (India, China, Iran) do not observe DST. And assuming 'GMT' and 'UTC' are interchangeable in all contexts - they are for time of day, but GMT is technically a time zone whereas UTC is an atomic time standard.
FAQ
- How is DST handled?
- We use the IANA timezone database via the browser's Intl API, so daylight saving rules - including historical and future changes - are correct for every supported zone.