The 9th day of Dhul-Hijjah (the Month of Hajj) is called the Day of Arafat. This day is the culminating event of the annual Islamic pilgrimage to Mecca, Saudi Arabia.
The Day of Arafat falls on the 2nd day of pilgrimage rituals. At dawn of this day, nearly 2 million Muslim pilgrims will make their way from Mecca to a nearby hillside and plain called Mount Arafat and the Plain of Arafat. It was from this site that the Prophet Muhammad, peace be upon him, gave his famous Farewell Sermon in his final year of life.

During the entire day, from dawn until sunset, Muslim pilgrims stand in earnest supplication and devotion, praying for God's abundant forgiveness. Tears are shed readily as those who gather make repentance and seek God's mercy, recite words of prayer and remembrance, and gather together as equals before their Lord. Muslims around the world who are not participating in the pilgrimage often spend this day in fasting and devotion.