Idgah or Eidgah (Urdu: عیدگاہ) is a large place especially set aside for the large congregation who will attend the special Eid prayer early in the morning and can be an open field or flat piece of ground.
On this festival the people, having previously distributed the alms, assemble in the vast Idgah, and being led by the Imam, recite their prayers.
It is only used as such on festival days for congregational prayers, the proper place always being the mosque on other occasions.
It was a practice of the Prophet Muhammad ﷺ to perform the Eid prayer in an Idgah at the outskirts of the city. Hence, it is considered a sunnah to perform Eid salaah at the Idgah. The very first Idgah was at the outskirts of Medina about one thousand yards from Masjid al Nabawi.