Arabic text
Hijri and Gregorian Date Converter
Convert Gregorian dates to Hijri and back, and see how the Islamic calendar variants differ.
Runs in your browser; nothing is uploaded. · Free, no account · 1 min
The Islamic calendars can differ by a day. Umm al-Qura is a table-based calendar. The result is a calculation, not a moon sighting.
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How to use
- Choose the direction: Gregorian to Hijri, or Hijri to Gregorian.
- Enter the date.
- Pick a calendar variant, or compare all four.
- Read the date, the month name and the weekday in Arabic and English.
What it checks and how it works
The converter uses the Islamic calendars that your browser implements through Intl.DateTimeFormat (ECMA-402): Umm al-Qura, the tabular civil and astronomical-epoch calendars, and the astronomical calculation in ICU. They can give different dates for the same day, so the tool names the variant it used and can show all four together.
These are calculated calendars. None of them predicts moon sighting, and a country's official date for the start of a month, such as Ramadan, can differ by a day. For religious or legal dates, use the date announced by the authority that applies to you.
Sources
- MDN Web Docs: Intl.DateTimeFormat opened 29 Oct 2026
- MDN Web Docs: Intl.supportedValuesOf (calendar keys) opened 29 Oct 2026
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Questions
About this tool
Some calendars use a fixed arithmetic rule (the tabular ones) and others use astronomical calculation or a published table (Umm al-Qura). The same day can fall on different dates in each.
Use it for planning only. The official start depends on moon sighting or on the authority's announcement, which can differ from any calculated calendar by a day.
Yes. The calendars come from your browser, and nothing is sent anywhere.
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