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.
I think it would be a good idea to have comments from secretaries and typists who are already using it. Then they can express their satisfaction with the product.