Shiasm in the context of "Eid al-Ghadir"

Eid al-Ghadir (Arabic: عید الغدیر, romanized: ʿīd al-ghadīr, lit. 'feast of the pond') is a holiday commemorating the event of Ghadir Khumm on 18 Dhul-Hijjah, when, according to interpretation in Shia Islam, the Islamic prophet Muhammad appointed Ali ibn Abi Talib as his successor. It is a significant holidays of Shi'ite Muslims and Alawites. According to Shia hadiths, this Eid has been named "Eid-e Bozorg-e Elāhi" (Persian: عید بزرگ الهی; i.e. the greatest divine Eid), "Eid Ahl al-Bayt Muhammad", "Yom Al-Wilayah" (يوم الولاية Day of the Guardianship), and Ashraf al-A'yaad (i.e. the supreme Eid).