EID is mainly the celebration of muslims but it is celebrated more than 200 people all over the world. There is 2 EID in a year. One is EID ul Fitr and another is EID ul Adha.This Eid Timing depends on moon.
Muslims Keep fast before the EID fest and when they see the moon, they become very happy.In the EID day , they pray together.
This Festival last atleast for 3 days. All organization including internation gets a national holiday.