Which day of the Islamic calendar is Eid al-Adha traditionally observed?

Eid al-Adha is traditionally observed beginning on 10 Dhu al-Hijjah, the tenth day of Islam’s final lunar month.

The festival follows the Day of Arafat, when hajj pilgrims perform the central standing rite on 9 Dhu al-Hijjah. On the tenth, pilgrims perform major rites in Mina and begin the period associated with the sacrifice. Muslims worldwide observe the festival with a special prayer, charity, family gatherings, and an animal sacrifice where practiced and permitted.

Eid al-Adha lasts several days in many communities, but its opening date is the tenth of Dhu al-Hijjah. It is linked to the willingness of Abraham to obey God and is also closely connected with the hajj season.

It differs from Eid al-Fitr, which begins on 1 Shawwal after Ramadan. Both dates are lunar and therefore move through the Gregorian calendar.