Can I convert a Hijri date back to Gregorian?

Yes — switch the direction and enter the Hijri year, month, and day.

What's the Hijri calendar based on?

It's a purely lunar calendar of 12 months, each beginning (traditionally) with the sighting of the new crescent moon — about 354-355 days per year, roughly 10-12 days shorter than the Gregorian solar year.

Why is the Hijri year sometimes shown as "AH"?

AH stands for "Anno Hegirae" (Latin for "in the year of the Hijra"), referencing the Prophet Muhammad's migration from Makkah to Madinah in 622 CE, which marks year 1 of the Hijri calendar.

Can this tool convert dates before 622 CE (year 1 AH)?

No — the Hijri calendar begins at the Hijra (622 CE); dates before that don't have a meaningful Hijri year.

How far off can the tabular calculation be from the real observed date?

Typically by 1 day, occasionally 2, since the tabular calendar follows a fixed arithmetic cycle rather than an actual moon sighting, which depends on local visibility conditions.

Does the tool support Hijri leap years?

Yes — the underlying tabular calendar follows a fixed 30-year cycle in which certain years get an extra day added to Dhu al-Hijjah, which the conversion handles automatically.

Is this the same calendar system used by Saudi Arabia's Umm al-Qura calendar?

Yes — this tool uses the Umm al-Qura tabular calculation method, though actual religious observances in Saudi Arabia are still confirmed by moon sighting.

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Islamic Tools

Hijri Date Converter

Convert any date between the Gregorian and Islamic (Hijri) calendars.

🔒 Runs entirely in your browser — nothing here is ever uploaded

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Last reviewed 2026-09-06

About the Hijri Date Converter

Converts any date between the Gregorian calendar and the Islamic (Hijri) calendar, in both directions.

100% Free Runs in Your Browser No Sign-Up Required

How to use it

Choose a direction (Gregorian → Hijri, or Hijri → Gregorian).
Enter the date.
Read the converted date.

Formula

Uses the Umm al-Qura tabular (arithmetic) Hijri calendar — a fixed 30-year leap-year cycle, not live moonsighting observations.

Worked example

September 6, 2026 converts to 24 Rabi' al-Awwal, 1448 AH.

The 12 Hijri months

The 12 Hijri months
#	Hijri month	Notable for
1	Muharram	Islamic New Year (1st); one of the four sacred months; Day of Ashura (10th)
2	Safar	No major fixed observance
3	Rabi' al-Awwal	Traditionally associated by many Muslims with Mawlid al-Nabi (the Prophet's birth)
4	Rabi' al-Thani	No major fixed observance
5	Jumada al-Awwal	No major fixed observance
6	Jumada al-Thani	No major fixed observance
7	Rajab	One of the four sacred months; traditionally linked to Isra and Mi'raj
8	Sha'ban	Month immediately preceding Ramadan
9	Ramadan	Month of obligatory fasting (sawm), one of the Five Pillars of Islam
10	Shawwal	Begins with Eid al-Fitr (1st)
11	Dhu al-Qi'dah	One of the four sacred months
12	Dhu al-Hijjah	Month of the Hajj pilgrimage; one of the four sacred months; Eid al-Adha (10th)

Interpreting your result

This is a calculated approximation, not local moonsighting announcements — the actual observed Islamic date in your country may differ by a day. Verified 2026-09-06 against a live Islamic-calendar site: correct month name, with exactly the expected ~1-day tabular-vs-sighting variance.

Recommendations

• If you need the officially observed date in a specific country, check that country's own moonsighting committee announcement rather than relying solely on a tabular calculation.
• The same Gregorian date can correspond to a different Hijri date depending on which tabular method or local sighting convention is used.

Frequently asked questions

This uses a fixed tabular (arithmetic) calendar. Many countries and communities instead announce dates based on actual local moon sighting, which can differ by a day.