Hijri Date Converter (Gregorian to Islamic and Back)
Pick a date to see it in the Hijri calendar, or enter a Hijri date to find the Gregorian date.
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Hijri Date Converter (Gregorian to Islamic and Back) by TheCalcTools
How the Hijri Date Converter (Gregorian to Islamic and Back) works
The Umm al-Qura calendar is the official calendar of Saudi Arabia, computed in advance from astronomical data. This converter uses its published month starts from 1365 to 1500 AH (1945 to 2077). Outside that range, or if you choose it, the tabular Islamic calendar is used: a fixed arithmetic cycle of 30 years with 11 leap years.
Many countries start months by local moon sighting, which can be one or two days after the calculated date. Pakistan and India are often one day later than Saudi Arabia, so use the adjustment to match your local calendar.
Gregorian dates use the proleptic Gregorian calendar. Days are counted from midnight; the Islamic day traditionally begins at sunset the evening before.
The formula
Worked example
Using the default values shown in the calculator:
| Convert | Gregorian to Hijri |
|---|---|
| Gregorian date | 2026-10-17 |
| Hijri year | 1448 |
| Hijri month | 9 Ramadan |
| Hijri day | 1 |
| Calendar | Umm al-Qura (Saudi Arabia, 1365-1500 AH) |
| Local adjustment (moon sighting) | None |
- 17 October 2026 in the Umm al-Qura calendar is 6 Jumada al-Ula 1448 AH.
- In the tabular calendar it is 5 Jumada al-Ula 1448 AH (tabular).
Result:
| Converted date | 6 Jumada al-Ula 1448 AH |
|---|---|
| In the other calendar system | 5 Jumada al-Ula 1448 AH (tabular) |
| Day of the week | Saturday |
| Gregorian date (ISO) | 2026-10-17 |
| Calendar used | Umm al-Qura |
Frequently asked questions
Why does my local Islamic date differ by a day?
Months that begin by sighting the new crescent can start a day or two after the calculated Umm al-Qura date. Use the local adjustment to match your mosque’s or government’s announcement.
What is today's Hijri date?
Open the calculator: the Gregorian date defaults to today, and the result shows today’s Hijri date.
How long is a Hijri year?
354 or 355 days: 12 lunar months of 29 or 30 days. That is why Ramadan moves about 11 days earlier each Gregorian year.
Sources and further reading
- King Abdulaziz City for Science and Technology: Umm al-Qura calendar
- hijridate (Umm al-Qura calendar data, 1343-1500 AH)
- Wikipedia: Tabular Islamic calendar
- Wikipedia: Islamic calendar
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