The open-air prayer ground often used for Eid prayers is called an Eidgah.
Eidgah, also spelled Idgah or Eid Gah, is a South Asian Islamic term for an open-air enclosure or field reserved especially for Eid prayers. These congregational prayers take place on the morning of Eid al-Fitr and Eid al-Adha, when large numbers of worshippers gather together outside ordinary mosque buildings.
Traditionally, an Eidgah was located outside or on the edge of a city. The arrangement allowed a very large congregation to pray in one place and reflected the communal character of the festival. In modern cities, an Eidgah may be a permanent enclosure, a public मैदान or field temporarily prepared for prayer, or an open space beside a mosque.
Eidgah should not be confused with a minbar, the pulpit from which a sermon is delivered, or a mihrab, the niche indicating the direction of prayer. A madrasa is an educational institution. The term is especially associated with South Asian Muslim culture, although similar open spaces are used for Eid prayers elsewhere.