Reuters: A Muslim holiday marking the climax of the annual pilgrimage (haj) on the 10th day of the 12th month of the Muslim calendar.
AP: Meaning “Feast of Sacrifice,” this most important Islamic holiday marks the willingness of the Prophet Ibrahim (Abraham to Christians and Jews) to sacrifice his son. During the holiday, which in most places lasts four days, Muslims slaughter sheep or cattle, distribute part of the meat to the poor and eat the rest. The holiday begins on the 10th day of the Islamic lunar month of Dhul-Hijjah during the annual hajj pilgrimage to Mecca.