Yemeni children enjoy carnival rides in celebration of Eid al-Adha Yemeni children enjoy carnival rides in a public park as people celebrate the Eid Al-Adha in Sanaa. Known as the "big" festival, Eid Al-Adha is celebrated each year by Muslims sacrificing various animals according to religious traditions, including cows, camels, goats and sheep. The festival marks the end of the Hajj pilgrimage to Mecca and commemorates Prophet Abraham's readiness to sacrifice his son to show obedience to God.