One of the five pillars of Islam, Ramadan is a religious obligation for all healthy adult Muslims who are able to fast from sunrise to sunset.
Muslims believe that the Koran was first revealed to the Prophet Muhammad during Ramadan. To mark this sacred occasion, they go without food and liquids, smoking and having sex during daylight hours for a month.
But what are some of the lesser known facts about one of the biggest festivals in the Muslim calendar? BBC