During the month of Ramadan, Muslims won't eat or drink during the hours of daylight. This is called fasting. Children are not expected to fast until they reach puberty, usually around the age of 14. Ramadan remembers the month the Qur'an (the Muslim holy book) was first revealed to the Prophet Muhammad. The actual night that the Qur'an was revealed is a night known as Lailut ul-Qadr ('The Night of Power').