Eid al-Adha is the second and the larger of the two main holidays celebrated in Islam . It honours the willingness of Ibrahim to sacrifice his son Ismail as an act of obedience to Allah's command. Before Ibrahim could sacrifice his son, however, Allah provided him with a lamb which he was supposed to kill in his son's place because of his willingness to sacrifice his own son in the name of God. In commemoration of this intervention, animals are ritually sacrificed. Part of their meat is consumed by the family which offers the animal, while the rest of the meat is distributed to the poor and the needy. Sweets and gifts are given, and extended family members are typically visited and welcomed. The day is also sometimes called the Greater Eid.
In the Islamic lunar calendar, Eid al-Adha falls on the tenth day of Dhu al-Hijjah and lasts for four days. In the international (Gregorian) calendar, the dates vary from year to year, shifting approximately 11 days earlier each year.