Gregorian to Hijri Converter
Convert any Gregorian date to the Islamic Hijri calendar — Umm al-Qura or tabular methods, with a moon-sighting adjustment. Free and instant.
About the Gregorian to Hijri Converter
This converter turns any Gregorian (Western) date into its Islamic Hijri equivalent instantly. Pick the calculation method that matches your community: Umm al-Qura, the official calendar of Saudi Arabia used for most administrative and religious scheduling, or one of the two classic tabular (arithmetic) calendars. The result shows the full Hijri date with weekday, month name and year in the AH (Anno Hegirae) era.
Because the Islamic calendar is lunar, months traditionally begin with the physical sighting of the new crescent moon, which can differ by a day or two from any calculated calendar. The adjustment option lets you shift the result by up to two days either way so it matches the announcements of your local moon-sighting committee — useful around Ramadan, Eid al-Fitr and Eid al-Adha.
The conversion runs entirely in your browser using the calendar systems built into modern browsers, so it is fast, private and needs no signup. Copy the result with one click for invitations, documents or planning Islamic occasions.
How to Use the Gregorian to Hijri Converter
- 1Pick the Gregorian date you want to convert (it defaults to today).
- 2Choose a calculation method — Umm al-Qura matches the official Saudi calendar.
- 3Apply a plus or minus day adjustment if your local moon sighting differs.
- 4Read the Hijri date, weekday and year, then copy it with one click.
Frequently Asked Questions
What is the difference between the Umm al-Qura and tabular methods?
Umm al-Qura is the calculated calendar officially used in Saudi Arabia; it is based on astronomical criteria for the new moon at Mecca and is what most printed Islamic calendars follow. The tabular calendars use a fixed 30-year arithmetic cycle of 354- and 355-day years — simple and predictable, but they can drift a day or two from observed dates.
Why might the converted date differ from my local mosque's calendar?
Islamic months classically begin with the sighted crescent moon, and sighting varies with geography, weather and local practice. Any computed calendar is therefore an approximation that may be off by a day. Use the adjustment dropdown to shift the result -2 to +2 days to align with your local authority's announcement.
What does AH mean in the Hijri year?
AH stands for Anno Hegirae, 'in the year of the Hijra' — the migration of the Prophet Muhammad from Mecca to Medina in 622 CE, which marks year 1 of the Islamic calendar. Because Hijri years are about 11 days shorter than Gregorian years, the two calendars drift relative to each other every year.
Can I convert dates far in the past or future?
Yes — any date your browser's date picker accepts converts fine, centuries in either direction. Keep in mind that for historical dates the calculated calendar may not match locally recorded observations, so treat old conversions as close approximations.
Is my date sent to a server?
No. The conversion uses the Islamic calendar support built into your browser's internationalization engine, so everything happens on your device with no signup and no data leaving the page.