Although Christmas is a widely celebrated holiday in many parts of the world, it is not a religious holiday for Muslims. Muslims follow the teachings of Islam, which is a monotheistic religion that focuses on the worship of Allah (God) and the belief in the Prophet Muhammad as the final messenger of Allah. For Muslims, the month of Ramadan is considered the most important time of the year, as it is the month in which the Quran (the holy book of Islam) was revealed to Prophet Muhammad. However, many Muslims do celebrate and enjoy the secular aspects of Christmas, such as gift-giving and spending time with family and friends.