Arafat

The next morning, on the ninth of Dhu al-Hijjah, the pilgrims leave Mina for Mount Arafat where they stand in contemplative vigil, near a hill from which Muhammad gave his last sermon. This is considered the highlight of the Hajj. Pilgrims must spend the afternoon within a defined area on the plain of Arafat until after sunset. No specific rituals or prayers are required during the stay at Arafat, although many pilgrims spend time praying, and thinking about the course of their lives. If a pilgrim does not spend the afternoon on Arafat then their pilgrimage is considered invalid