The Hajj is an annual Islamic pilgrimage to Mecca, Saudi Arabia, the holiest city for Muslims. Hajj is a mandatory religious duty for Muslims that must be carried out at least once in their lifetime by all adult Muslims who are physically and financially capable of undertaking the journey, and can support their family during their absence.

In Islamic terminology, Hajj is a pilgrimage made to the Ka’ba, the "House of God", in the sacred city of Mecca. It is one of the Five Pillars of Islam. The Hajj is a demonstration of the solidarity of the Muslim people, and their submission to Allah (swt). The word Hajj means "to attend a journey", which connotes both the outward act of a journey and the inward act of intentions. The pilgrimage to Mecca takes place each year during Dhul Hijjah, the last month of the Islamic calendar.