Eid begins when the new moon marking the end of Ramadan and the start of the new month, Shawaal, is spotted. Like Ramadan, which also begins with the sighting of the new moon, the date of Eid is somewhat subjective – the moon is not spotted on the same day everywhere. For some, Eid began last night and today is the first day. For others, the celebration won’t start until tonight.
Much of the Muslim world follows the lead of Saudi Arabia, home to Mecca. According to Arab News, the committee in Saudi Arabia responsible for sighting the moon spotted it on Monday night, and today is the first full day.