I think "partij" should be also accepted, especially in a (historical) event context. Like for example in "Ik heb een partij nodig om aan het bewind te komen." Pls point it out if I am wrong in any way.
But, I would say "Maybe not". We are learning the word feest. If we start accepting partij, people may not learn that word properly: everytime they would see party, they would just type partij and not feest.