The festival begins when the new moon is first sighted: Eid al-Fitr doesn't begin until the new moon appears in the sky (although traditionally, and still today for many Muslims, it doesn't begin until the barest sliver of a waxing crescent moon is seen). Technically, that means that across the world, Eid al-Fitr starts at different times and even different days, depending on location. EPS | Ashwin Prasath