Convert Between Hijri & Gregorian
Hijri Date
How to use it
Pick a direction with the toggle, then set the date. The converted date updates as you change it. The Gregorian-to-Hijri side is the most common: enter any normal calendar date and see its Islamic equivalent. Hit “Use today’s date” to jump straight to today in either direction.
How accurate is it?
The result is checked against a live date service and falls back to a calibrated calculation if you’re offline. Either way it’s accurate to within a day. Islamic months start with the crescent moon, so the exact first day of a month can vary by a day between countries, which is normal, not an error.
Gregorian to Hijri, and back
This tool works both ways. Gregorian to Hijri is what most people need: you have a normal date, a birthday, an appointment, a historical event, and you want its Islamic equivalent. Switch the toggle and it runs the other way, taking a Hijri date like 1 Ramadan 1447 and telling you which Gregorian day that lands on.
The Hijri-to-Gregorian direction is handy for planning around Islamic dates. If you know an event falls on the 15th of Shaʼban, convert it to see the exact weekday and Gregorian date so you can put it in your phone calendar.
Why two dates can disagree by a day
If you check the same date on two sites and get answers a day apart, nothing is broken. There are a few different methods in use, and they don’t always land on the same day.
Some tools use pure astronomical calculation. Some follow official moon-sighting announcements, which can come a day later than the calculation predicts. And conventions differ by region: the Indian subcontinent often sights the crescent a day after Saudi Arabia, so an Indian Hijri date can sit one day behind a Saudi one. A one-day gap at the start or end of a month is the norm, not a mistake.
What the Hijri calendar is
The Hijri calendar is the Islamic lunar calendar. It has 12 months and runs 354 or 355 days a year, about 11 days shorter than the Gregorian year. That gap is why Islamic dates move earlier through the Western calendar each year and cycle through all the seasons over roughly 33 years.
The years count from 622 CE, the year of the Hijra, the Prophet Muhammad’s ﷺ migration from Makkah to Madinah. That’s why Hijri years carry AH after them, short for After Hijra. To see today’s date or the current month, use the Islamic date today tool or the Islamic month today page.
Common reasons people convert dates
A few uses come up again and again, and the converter handles all of them:
- Finding your Islamic birthday, the Hijri date you were born on.
- Working out which Gregorian day an Islamic event falls on this year.
- Checking the Hijri date of a past event, like a wedding or a relative’s passing, for its anniversary.
- Planning ahead for Ramadan, Eid, or Hajj by converting the Hijri date to a calendar date.
A note on historical and future dates
You can convert dates well into the past and future. Just remember the result for those is a calculated date, because no moon-sighting record exists for a day centuries ago or years from now. For everyday and near-term dates it’s reliable; for distant ones, treat it as the astronomical best estimate.
Frequently Asked Questions