Hijri Date Converter
Convert any date between the Hijri (Islamic) and Gregorian calendars, based on the Umm al-Qura calendar.
How this converter works
This tool uses the Umm al-Qura calendar (the calendar officially used in Saudi Arabia) to convert dates between the Hijri and Gregorian systems directly in your browser, with no data sent to any server. The Hijri calendar is lunar, with years of 354 or 355 days, while the Gregorian calendar is solar with 365 or 366 days — so the Hijri date gradually shifts through the Gregorian seasons over the years.
Important note on accuracy
The result is an accurate astronomical estimate based on the Umm al-Qura calendar, and may differ by a day from the official announcement of the start of Hijri months tied to religious occasions (such as Ramadan, Shawwal and Dhu al-Hijjah), since the official start of these months is based on moon-sighting announcements rather than calculation alone. For religious observances, please confirm the official announcement in your country.
Frequently asked questions
Which Hijri calendar system does this use?
This converter uses the Umm al-Qura calendar, the official calendar of Saudi Arabia, calculated astronomically via the browser's built-in international date engine rather than a fixed arithmetic formula.
Why might this date differ by a day from a moon-sighting announcement?
The Umm al-Qura calendar is calculated astronomically in advance, while some countries and mosques confirm the start of a Hijri month by physical moon sighting, which can shift the date by a day depending on local visibility conditions.
Can I convert both from Hijri to Gregorian and the other way around?
Yes - switch between the two tabs to convert a Gregorian date to its Hijri equivalent, or enter a Hijri day, month and year to find the matching Gregorian date.