The Islamic pilgrimage to Mecca is known as the
1 Performing the Hajj, is one of the five pillars of Islam, and all able-bodied Muslims should go at least once in their lives if they can afford it. 2  Umrah, which is known as the 'lesser pilgrimage', is a journey to Mecca (Makkah) at any time in the year.3  The pilgrimage lasts for six days..M Farooq. Every year millions of Muslims travel to Mecca for the Hajj. Every year about 2 million Muslims travel to Al-Masjid Al-Haram, Islam's most sacred mosque, in Mecca, Saudi Arabia, where they perform a number of spiritual rites, in a process known as the Hajj.