Eid al-Mab’ath marks the day Shia tradition holds that the Prophet Muhammad received his first revelation in the Cave of Hira and was formally called to prophethood — not his birth or death. It falls on 27 Rajab in the Islamic lunar calendar, which this year (1448 AH) corresponds to Wednesday, January 6, 2027.
The Meaning of the Word “Mab’ath”
“Mab’ath” comes from the Arabic root b-‘-th, meaning “to raise up” or “to send forth” — the same root found in “bi’thah,” meaning mission or calling. “Eid al-Mab’ath” is literally the day the Prophet was raised to that mission, distinct from any anniversary of his birth.
Why Does This Day Matter?
According to traditional accounts, the Prophet Muhammad was around 40 years old when, during one of his regular retreats to the Cave of Hira — a mountain near Mecca, Saudi Arabia today — he received the first words of revelation. That single moment marked the start of his prophetic mission, a turning point that would go on to reshape the course of much of world history.
Eid al-Mab’ath commemorates that moment specifically: not a birthday, not a death anniversary, but the beginning of a calling.
Whose Tradition Is This?
The formal observance of Eid al-Mab’ath on 27 Rajab is mainly a Twelver Shia practice, and it’s worth naming that plainly rather than presenting it as a universal Islamic occasion. In much of Sunni tradition, the same date — 27 Rajab — is instead associated with a different event entirely: Isra and Mi’raj, the Prophet’s night journey to Jerusalem and his subsequent ascension. Both traditions treat this date on the lunar calendar as significant, but with different focus and different stories attached to it — a distinction worth stating honestly rather than smoothing over.
It’s also worth noting that early historical sources don’t agree precisely on the exact day or month of the first revelation. Different historians and biographers have recorded slightly different details.
How Is Eid al-Mab’ath Observed Today?
In many Shia communities, Eid al-Mab’ath is treated as a day of joy rather than mourning. Mosques are lit up, religious gatherings are held, and fasting on this day is commonly recommended. For many families, it’s also an occasion to retell the story of the first revelation to children and reflect on what the beginning of the Prophet’s mission meant.
Why Does the Gregorian Date Change Every Year?
The Islamic lunar calendar tracks the phases of the moon rather than the sun, and a lunar year runs about 11 days shorter than a Gregorian one. That means the Gregorian date equivalent to 27 Rajab shifts roughly 11 days earlier with each passing year. Because of that drift, this article’s confirmed date is the one part updated annually — the rest of the content stays the same from year to year.
Curious about the moment of that first revelation — the Prophet’s reaction, Khadija’s role, and what happened next? Read What Is Wahy (Revelation)? on the Noorjoo magazine. For the Prophet’s full story, visit his page on Noorjoo.
Sources
- Ibn Hisham (from the account of Ibn Ishaq), As-Sira an-Nabawiyya
- Encyclopaedia of Islam, Brill
- Hijri-to-Gregorian conversion for 27 Rajab 1448 AH: hijri-gregorian.com (verified at time of writing)