Ramadan is a period of fasting and spiritual growth, and is one of the five "pillars of Islam." The others being the declaration of faith, daily prayer, alms-giving, and the pilgrimage to Mecca. Able-bodied Muslims are expected to abstain from eating and drinking from dawn to sunset each day of the month.
Many practicing Muslims also perform additional prayers, especially at night, and attempt to recite the entire Qur'an. The prevailing belief among Muslims is that it was in the final 10 nights of Ramadan that the Qur'an was first revealed to the Prophet Muhammad.