Eid al-Ghadīr is one of the most important holidays in the Shi’ah tradition. 

It is celebrated on the 18th of Dhul Hijjah and marks the day that Prophet Muhammad (ṣ), once again, announced Imam ‘Ali (‘a) as his successor following a direct order from God. This was also the occasion of revelation for Surah al-Maidah (5), verse 67. 

This event occurred in front of a large audience of Muslims at the pond of Ghadir on the return journey from the Prophet’s (ṣ) last Hajj. 

Fasting, reciting Ziyarat Aminullah and Du’a al-Nudba, as well as other acts of worship, are highly recommended on this day. It is also highly advised to fast on this day.