The Muslim festival Ramadan is observed this year from June 18 through July 17. Ramadan is the ninth month of the Islamic calendar, during which adult Muslims do not eat or drink during daylight hours. The month is the time when the holy Qur'an was first revealed to the Prophet Muhammad. The fast is one of the five pillars of Islam and is obligatory for all adult Muslims except for travelers, the elderly, pregnant, menstruating, or seriously ill; those who cannot fast (as well as those who can) give money to the poor. As this site explains, it is a time of extra prayers, reading of the Qur'an, self-discipline, the seeking for forgiveness, and doing good deeds. Allah multiplies the value of good deeds during this month. This site provides more information about this time.