playdate

Short definition from Wiktionary

Noun

1. 1
   The occasion of a child having a friend come over to play at their house, traditionally scheduled by both children's parents.
2. 2
   The occasion of a child having a friend come over to play at their house, traditionally scheduled by both children's parents: Any scheduled recreation, especially if not scheduled by those directly involved.
3. 3
   The date of a showing of a film.