
Eid al-Fitr also called the “Festival of Breaking the Fast” or Lesser Eid, or simply Eid, is a religious holiday celebrated by Muslims worldwide that marks the end of the month-long dawn-to-sunset fasting of Ramadan.
It falls on the first day of Shawwal in the Islamic calendar; this does not always fall on the same Gregorian day, as the start of any lunar Hijri month varies based on when the new moon is sighted by local religious authorities. The holiday is known under various other names in different languages and countries around the world.

Eid al-Fitr was originated by the Islamic prophet Muhammad. According to certain traditions, these festivals were initiated in Medina after the migration of Muhammad from Mecca. Anas, a well-known companion of the Islamic prophet, narrated that, when Muhammad arrived in Medina, he found people celebrating two specific days in which they entertained themselves with recreation and merriment. At this, Muhammad remarked that Allah had fixed two days of festivity: Eid al-Fitr and Eid al-Adha.
E: Embrace with open heart
I: Inspire with impressive attitude
D: Distribute pleasure to all
EID Mubarak!
Source: Wiki