Hajj occurs during the first 13 days of the month of Dhul-Hijjah, the 12th or last month of the Islamic (lunar) Calendar with the rituals starting primarily on the 8th day of Dhul-Hijjah. Some scholars hold that the first 10 days of Dhul Hijjah are last the final 10 days of Prophet Moses’ 40 night repose with God at Mount Sinai, wherein Allah communicated with him directly and gave him the 10 commandments.