How to use the hijri date converter
- Choose a direction: Gregorian to Hijri, or Hijri to Gregorian.
- Enter the date — or press "Today" to use the current date.
- Read the converted date, shown instantly with no page reload.
How it works
This converter uses the Umm al-Qura calendar via the browser's built-in Intl.DateTimeFormat API. For Gregorian → Hijri, the Gregorian date is formatted directly in the Islamic calendar. For Hijri → Gregorian, the tool estimates a starting Gregorian date from the Hijri epoch (1 Muharram 1 AH ≈ 622-07-19 CE) and the average Hijri year length, then nudges day by day until the formatted Hijri date matches your input exactly.
Frequently asked questions
Which Hijri calendar does this use?
The Umm al-Qura calendar, widely used across the Muslim world.
Why is the date one day off from my country?
Islamic months can begin with the local moon sighting, which can vary by about a day from the calculated calendar.
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Last reviewed: July 11, 2026