18 Dhul-Hijjah 1435
Eid al-Ghadeer, observed by Shia Muslims on the 18th of Dhu al-Hijjah in the Islamic calendar, is a celebration of the appointment of Ali ibn Abi Talib by the Islamic prophet Muhammad as his successor. The festival also marks the anniversary of Muhammad’s sermon, as described in Hadith of the pond of Khumm in which Muhammad states, “Whomsoever’s master (maula) I am, Ali is also his (maula) master. O God, love those who love him, and be hostile to those who are hostile to him.["من كنت مولاه فهذا عليّ مولاه أللهم والِ من والاه و عادِ من عاداه"]
Shia Muslims celebrate the day with a tradition of a mass oath to reasserting their commitment to Islam, in the same manner as individual Shia adults take an oath on reaching adulthood. Sunni Muslims do not celebrate Eid al-Ghadeer because they do not believe that it is an established celebratory day. The Sunni believe that when Allah stated in Quran 5:3, this day have I perfected for you your religion and completed My favor on you and chosen for you Islam as a religion. The religion was perfected. Since this eid was not practised then adding to something that is perfected does not make it more perfect but imperfect.