Ramadan is the ninth month of the Muslim calendar, calculated according to when the crescent moon is sighted. During this entire month, adult Muslims do not eat from sunup to sundown. This is called fasting. In the evening, the day's fast is broken with a meal called iftar. Before the day's fast begins, Muslims eat a pre-dawn meal called suhoor. When the month is over, Muslims celebrate a three-day holiday with feasting and gift exchanges, called Id-ul-Fitr (the Festival of Breaking the Fast).