School Festival, Culture Festival, Arts Festival
noun
Remember how 文化 means "culture?" Well add festival to it and you end up with a culture festival! These happen all the time at Japanese schools, so sometimes they're called school festivals too.
ぶんかさい
This is a jukugo word that uses the on'yomi readings of the kanji. You've learned all of these readings already, good for you!
そっちの学校の文化祭っていつ？
When is your school's culture festival?
文化祭の練習、何時にする？
What time should we start the school festival rehearsal?
うちの文化祭に誰か有名人が来るらしいよ！
It seems like a famous person is going to come to our school's culture festival!