朝觐, or Hajj, is an annual Islamic pilgrimage to the holy city of Mecca in Saudi Arabia. It is one of the Five Pillars of Islam, making it a fundamental act of worship for Muslims. The pilgrimage occurs during the Islamic month of Dhu al-Hijjah and involves a series of rituals performed over several days. During Hajj, millions of Muslims from around the world gather to perform specific rites, including walking around the Kaaba, standing at Arafat, and throwing stones at pillars representing temptation. This spiritual journey emphasizes unity, humility, and devotion to Allah.