Date Converter
Convert dates between Hijri and Gregorian calendars
How Hijri–Gregorian conversion works
This converter uses the Umm al-Qura calendar, Saudi Arabia's official arithmetic calendar, instead of relying on local naked-eye moon sighting, which can vary from country to country. The Hijri year is a lunar year of 354 or 355 days, while the Gregorian year is a solar year of 365 or 366 days — a gap of about 11 days a year that makes Islamic occasions like Ramadan and Hajj drift steadily through every Gregorian season over a roughly 33-year cycle.
Use this tool to find your Gregorian birth date in Hijri, date a religious occasion, a marriage contract, or an official document, or simply to check today's Hijri date accurately.
Frequently Asked Questions
How do I convert a Hijri date to Gregorian? +
Select the Hijri day, month, and year in the tool above, then click Convert to get the corresponding Gregorian date instantly.
How do I convert a Gregorian date to Hijri? +
Select a Gregorian date from the tool, then click Convert to get the corresponding Hijri date based on the Umm al-Qura calendar.
Is the conversion 100% accurate? +
The tool uses the Umm al-Qura calendar, Saudi Arabia's official arithmetic calendar and the most accurate calculation method available, though some countries may announce the start of a month a day earlier or later based on local moon sighting.
Why do Hijri dates sometimes differ between countries? +
Some countries rely on naked-eye crescent sighting, while this tool uses the Umm al-Qura astronomical calculation, which can create a one-day difference at the start of a month.
How many days do Hijri months shift each year? +
About 11 days, since a Hijri year is 354–355 days versus 365–366 in the Gregorian year. That is why Islamic occasions like Ramadan cycle through every Gregorian season over roughly 33 years.