Islam requires fasting during the month of Ramadan. The Islamic calendar is different than the calendar we use and is not always at the same time. Islam also calls for prayers 5 times a day facing in the direction of Mecca, one of the holiest cities. Muslims are expected to make a pilgrimage to Mecca (Hajj/Hadj) at least once in their lifetime. By going on Hajj, Muslims are fulfilling the one of the 5 pillars of faith.