cel·e·brate / ˈseləˌbrāt/ • v. [tr.] 1. mark (a significant or happy day or event), typically with a social gathering. ∎  [intr.] do something enjoyable to mark such an occasion: she celebrated with a glass of champagne. ∎  reach (a birthday or anniversary).2. perform (a religious ceremony) publicly and duly, in particular officiate at (the Eucharist): he celebrated holy communion.3. honor or praise publicly: a film celebrating the actor's career| [as adj.] (celebrated) a celebrated mathematician. DERIVATIVES: cel·e·bra·tor / -ˌbrātər/ n.cel·e·bra·to·ry / səˈlebrəˌtôrē; ˈseləbrə-/ adj.

celebrate XV. f. †celebrate, pp. (XV) — L. celebrātus, pp. of celebrāre, f. celeber, celebr- frequented, frequent, renowned; see -ATE 3.
Hence celebrated famous XVII. So celebration XVI.