Muslims prepare for Ramadan, a month of fasting, prayer, and reflection, starting at sunset Friday and ending March 30. Follow Newsweek's live blog.

However, unlike other religious holidays, Ramadan doesn't start on the same day each year. This is because the Islamic calendar follows the moon's cycle. And what can be even more confusing is that different groups might give slightly different dates for when Ramadan starts,

Saudi Arabia has officially announced that Ramadan will begin on Saturday, March 1, with the sighting of the crescent moon. Muslims throughout the Kingdom and beyond will fast from dawn to dusk, devoting the month to spiritual development,