observe, celebrate, keep -- (behave as expected during of holidays or rites; "Keep the commandments"; "celebrate Christmas"; "Observe Yom Kippur")
celebrate, fete -- (have a celebration; "They were feting the patriarch of the family"; "After the exam, the students were celebrating")
lionize, lionise, celebrate -- (assign great social importance to; "The film director was celebrated all over Hollywood"; "The tenor was lionized in Vienna")