Muslims across the world are marking the start of the holy month of Ramadan. The timing of Ramadan varies in different countries depending on the sighting of the new moon, which marks the start of the month in the Islamic calendar. Traditionally, the month begins the evening after authorities in each country announce that their moon-sighting council has spotted the crescent moon. Around the world, believers go to mosques to offer special prayers to mark the beginning of Ramadan, the ninth and holiest month in the Islamic calendar.
