Convert a local datetime between IANA zones with DST rules explained. Fully client-side — no account, uploads, or remote storage.
Added Apr 18, 2026 · Updated May 1, 2026
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Enter a value for date & time to see your result.
Converts a date and time from one timezone to another. Automatically handles Daylight Saving Time (DST) transitions using the IANA timezone database via Luxon.
New York is UTC-5 in January (EST), so noon UTC = 7 AM EST.
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Yes. The converter uses the IANA timezone database (via Luxon) which includes all historical and future DST transitions for every timezone.
Many countries near the equator (like Singapore and India) or in specific regions choose not to shift clocks because the day length variation is minimal throughout the year.
Some regions use half-hour or quarter-hour offsets from UTC for historical and political reasons. IANA data includes those exact offsets, including DST shifts where they apply.
Yes. When clocks spring forward, a local time may not exist; when they fall back, it may exist twice. Always confirm recurring meetings with a calendar product that stores the absolute instant, not just the wall time.
Conversions run in your browser for quick checks. Avoid pasting highly sensitive timestamps if your threat model requires air-gapped handling; we do not operate a conversion API for this UI.