bicentenary
n
two-hundredth anniversary; celebration of this 二百周年; 二百周年庆祝活动
1949 was the bicentenary of Goethe's birth. 1949年是歌德诞生二百周年.
[attrib 作定语]
bicentenary celebrations 二百周年庆典.
We also make the fundamental error of announcing our resolutions to everybody so that we look even more foolish when we slip back into our bad old ways.