Celebrated about two months after Hari Raya Aidilfitri, on the 10th day of Zulhijjah, the 12th (last) month of the Muslim calendar, it marks the end of the haj pilgrimage period (about two weeks).
Aidiladha also commemorates the sacrifices made by the Prophet Ibrahim (hence the word 'korban,' which means sacrifice in Arabic), who demonstrated immense faith when he was put to the test by God.
Prophet Ibrahim was commanded to offer his son Ismail up for sacrifice, and though it grieved him greatly, he made ready to perform the task. However, as he was about to strike his son, God stopped him and revealed that it was a trial. Ismail's life was spared, and a ram was sacrificed in his place.