Dhu al-Hijjah (Arabic: ذو الحجة‎; properly transliterated) is the twelfth and final month in the Islamic calendar. It is a very sacred month in the Islamic calendar, one in which the Hajj (pilgrimage) takes place.

"Dhu al-Hijjah" literally means "Possessor of the Pilgrimage" or "The Month of the Pilgrimage". During this month Muslim pilgrims from all around the world congregate at Mecca to visit the Kaaba. The Hajj is performed on the eighth, ninth and the tenth of this month. Day of Arafah takes place on the ninth of the month. Eid al-Adha, the "Festival of the Sacrifice", begins on the tenth day and ends on sunset of the twelfth.

Hadith

According to Islamic traditions, the first 10 days of Dhu al-Hijjah are the most blessed days in which to do good deeds:

Narrated Ibn Abbas: The Prophet said, "No good deeds done on other days are superior to those done on these (first ten days of Dhu al-Hijja)." Then some companions of the Prophet said, "Not even Jihad?" He replied, "Not even Jihad, except that of a man who does it by putting himself and his property in danger (for Allah's sake) and does not return with any of those things." (Reported by Tirmidhi)