Eid-al-Fitr (Eid al-Fitr, Eid ul-Fitr, Id-Ul-Fitr, Eid) is the first day of the Islamic month of Shawwal. It marks the end of Ramadan, which is a month of fasting and prayer. Many Muslims attend communal prayers, listen to a khutba (sermon) and give zakat al-fitr (charity in the form of food) during Eid al-Fitr.
This falls on the first day of the month of Shawwal. The date for the start of any lunar Hijri month varies based on when the new moon is sighted by local religious authorities, so the exact day of celebration varies by locality.