Dhul Hijjah (ḏū-l-ḥiǧǧatu ذو الحجة) is the 12th month on the Islamic calendar. The 10th day of this month is the culmination of Hajj. The Islamic calendar or Muslim calendar (also called Hegiran calendar) is the calendar used to date events in predominately Muslim countries, and used by Muslims everywhere to determine the proper day on which to celebrate Muslim holy days. ... The Hajj or Haj is the Pilgrimage to Mecca (or, Makkah) and is the fifth of the Five Pillars of Islam. Every able-bodied Muslim who can afford to do so is obliged to make the pilgrimage to Mecca at least once in a lifetime. ...