Eid-ul-Fitr

Eid al-Fitr is the first of the two main festivals in Islam, the other being Eid al-Adha. The holiday falls on the first day of Shawwal, the tenth month of the Islamic calendar. One of the most important Islamic celebrations, Eid al-Fitr is celebrated by Muslims worldwide as it marks the end of the month-long, dawn-to-dusk fasting (sawm) during Ramadan. The holiday is known under various other names in different languages and countries around the world.

Eid-ul-Fitr is observed in Islam. The summary above comes from Wikipedia, where you can read about the history and traditions of this observance.

Eid-ul-Fitr falls on Friday, September 03, 2027. The countdown above updates live, so you always see exactly how many days, hours, and minutes are left.