Saudi Arabia: muslim pilgrims get ready for start of hajj Hundreds of thousands of pilgrims from around the world on Tuesday began moving to Mina in Saudi Arabia for the start of the hajj, the world's largest annual gathering. The first day of hajj is known as Tarwiah Day, when pilgrims traditionally watered their animals and stocked water for their trip to Mount Arafat. IMAGES of pilgrims leaving for Mount Arafat