About 70 days after the end of Ramadan, Muslims around the world celebrate Eid-al-Adha. This second major holiday on the Islamic calendar commemorates Abraham's willingness to sacrifice his son, Ishmael, as they believe.
During the three or more days of this religious festival, Muslims gather to pray, to socialize, and to participate in acts of charity. Traditionally, the celebration includes the slaughter of a lamb or other sacrificial animal by Muslims who can afford it, and the proceeds are divided into three portions - one for those in need, one for friends and relatives, and the third part is kept for the immediate family.
Eid-al-Adha, the Festival of Sacrifice, occurs at the end of Hajj, the annual pilgrimage to Mecca that all able Muslims make at least once in a lifetime.