In another Hadith it has been mentioned that one day during the days of the “open caliphate” of Imam 'Ali ((عليه السلام).), the day of Jumu'ah and 'Eid Ghadir fell together. On this day, the Imam ((عليه السلام).) delivered a long speech and said, “This gathering shall soon come to an end and all of you will go back to your homes and families – may Allah shower His mercy upon all of you.
Ws Brother, the above is from the link you shared. This is the best proof for Imam Ali celebrating eid e ghadeer? I just don’t find this compelling. Even in this hadith Imam Ali doesn’t even acknowledge Eid e Ghadeer. I just find this troubling with how far we have taken this “eid”.