What is an IANA timezone?

Named timezone identifiers like America/New_York or Europe/Paris. Unlike UTC offsets (e.g. -05:00), they automatically account for DST changes.

Does it handle daylight saving time?

Yes. DST rules are built into your browser's Intl.DateTimeFormat implementation and update with each OS/browser update.

Why 'now' slightly different from my clock?

Your system clock may drift by a few seconds. The 'now' button uses your device time, so accuracy matches your OS clock sync.

Timezone Converter

Date & Time· 10 tools

Free timezone converter. Enter a date/time in any IANA timezone (America/New_York, Europe/London, Asia/Tokyo, etc.) and convert it to another — daylight saving transitions handled automatically by the browser's Intl API.

Date & Time

From

Select a date and timezones to convert

Frequently Asked Questions

References

IANA Time Zone Database — Internet Assigned Numbers Authority
Intl.DateTimeFormat — timezone-aware formatting — MDN Web Docs

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Frequently Asked Questions

References and sources

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