celebration
noun
ˌselɪˈbreɪʃn 
ˌselɪˈbreɪʃn 
1 [countable] a special event that people organize in order to celebrate somethingbirthday/wedding celebrations2 [uncountable, countable] the act of celebrating somethingHer triumph was a cause for celebration.a party in celebration of their fiftieth wedding anniversaryThe service was a celebration of his life (= praised what he had done in his life).