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Calendar converter
Convert dates between the Gregorian, Hijri, Hebrew, Persian, Chinese, and other calendars.
ICU via Intl · both directions · supported range 1900-2100
today is taken from your browser after the page loads
Converted by your browser's own ICU calendar tables via Intl (UTC calendar days; time zones never enter). Reverse direction: a bounded binary search over the supported 1900 to 2100 Gregorian range, verified by formatting back; no match means no such date, never a nearest guess.
- Conversions are calendar days at UTC. Time zones and DST never enter a calendar conversion. Instants belong to the sky and timezone tools.
- The supported range is exactly 1900-2100 Gregorian. Outside it the tool refuses; inside it, every reverse conversion is verified by formatting back before it is shown.
- Calendars this browser’s ICU does not provide are absent from the list: probed live, never assumed.
- Hijri months in particular depend on authority (sighting vs table); the three Hijri variants here are the table-based ones ICU ships, and their labels say which is which.
Paste, drop, or type to begin. Everything stays on this device.