Hajj means to visit the sacred house of Allah in Makkah Mukarramah during the days of Hajj, (i.e. 8, 9, 10, 11 and l2th of Zil Hijjah). This is the fifth of the religious duties of a Muslim.

Pilgrimage to the house of Allah is a bounded duty unto mankind for him who has the means to find the way thereunto, and whosoever disbelieves, then verily Allah is free and Independent from the entire universe. (Qur'aan; Surah Aale Imraan, verse 97)

It is Sunnate Muakkadah to perform Umrah once in a lifetime. Umrah could be performed practically throughout the year. However, an Umrah during Ramadhaan is superior to the Umrah performed on other days. Rasulullah (peace and blessings be upon him) has mentioned, "An Umrah performed during Ramadhaan is equal (in reward) to performing Hajj with me." It is Makroohe Tahreemee to perform Umrah on the 9, 10, 11 and l2th of Zil Hijjah (the days of Hajj).