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Convert dates between the Islamic Hijri (lunar) calendar and the Gregorian (solar) calendar. Includes Ramadan and Eid markers.
Islamic
Generated on May 23, 2026
Convert dates between the Islamic Hijri (lunar) calendar and the Gregorian (solar) calendar. Includes Ramadan and Eid markers.
The Hijri ↔ Gregorian Date Converter translates dates between the two most-used calendars in the Muslim world. The Islamic / Hijri calendar is a lunar calendar (12 months × ~29.
Formula
Hijri date = (Julian Day of Gregorian date − Julian Day of 1 Muharram 1 AH) ÷ 354.367 (average lunar year length).Most of the time, you need to convert a Hijri date because life forces you to — a relative was born on 14 Sha'ban and the school wants a Gregorian date for admission, your grandmother passed on 10 Muharram and you are filing the death certificate, or Hajj season is approaching and your travel agent needs to know which Gregorian week you will be in Mina. The Islamic calendar is purely lunar, eleven days shorter than the Gregorian year, which is why Ramadan slowly drifts backward through the seasons — your father remembers fasting in winter, you remember fasting in summer, and both are correct. This converter uses the Umm al-Qura tabular calendar, which is what Saudi Arabia, UAE, Pakistani NADRA documents, and most official Hijri references go by. Honest take: do not be surprised when the date on a passport is one day off from what your local mosque announced — Pakistani Ruet-e-Hilal can call the moon a day later than the Saudi sighting, especially for Ramadan and Eid. For paperwork, trust the tabular date here. For when to fast or celebrate, trust your imam.
The Hijri ↔ Gregorian Date Converter translates dates between the two most-used calendars in the Muslim world. The Islamic / Hijri calendar is a lunar calendar (12 months × ~29.5 days = ~354 days per year) starting from the migration (Hijra) of Prophet Muhammad ﷺ from Mecca to Medina in 622 CE. The Gregorian calendar is a solar calendar (365.25 days) introduced by Pope Gregory XIII in 1582. Because the Hijri year is 11 days shorter, Islamic dates shift backward through the Gregorian year — Ramadan moves through every season over 33 years. This converter uses the Aladhan API which implements the official Umm al-Qura calendar (used in Saudi Arabia and most Muslim countries); local moon-sighting can shift dates by ±1 day.
Both calendars are converted via the Julian Day Number — a continuous count of days since 1 January 4713 BCE used in astronomy. The Hijri epoch starts at JDN 1948440 (16 July 622 CE). Modern Hijri date conversion uses the Umm al-Qura tabular calendar, which prescribes specific 29- or 30-day months instead of relying on actual moon sighting; this gives a deterministic answer that can be computed years in advance. Local moon-sighting committees (in Pakistan: Ruet-e-Hilal Committee) may declare the start of a Hijri month one day earlier or later than the official Umm al-Qura calendar.
1 Muharram 1447 AH = 27 June 2025 — the Islamic New Year.
1 Ramadan 1446 AH = 1 March 2025 — start of Ramadan in 2025.
10 Dhu al-Hijjah 1446 AH = 6 June 2025 — Eid al-Adha 2025 (Bakra Eid).
Birth of Prophet Muhammad ﷺ traditionally celebrated on 12 Rabi al-Awwal — varies by year between September and December in the Gregorian calendar.
Hijra (the migration that starts the Islamic calendar): 1 Muharram 1 AH = 16 July 622 CE.
27 Ramadan (Laylat al-Qadr, Night of Power): a likely odd-numbered night in the last 10 days of Ramadan, considered the most blessed night of the year.
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