In Islam, Eid is the name of two Islamic festivals:

• Eid ul-Fitr, after fasting the month of Ramadan, on the first day of Shawwal.
• Eid ul-Adha, remembering Prophet Ibrahim's willingness to sacrifice his son to Allah, on the tenth day of Dhu al-Hijjah, for those not on pilgrimage.

The Eids are celebrated by Muslims all around the world.

• Are the two Eids pagan? Quranaloneislam.org