bicentenary
noun(plural bicentenaries)
(British English) (especially North American English bicentennial)
the year, or the day, when you celebrate an important event that happened exactly 200 years earlier 200 周年;200 周年纪念日 Mozart’s bicentenary 莫扎特二百周年纪念 to celebrate/mark the bicentenary of somebody/something 庆祝/纪念某人/某事200周年