bicentenary
bicentennial
a bicentennial
a bicentennial
Bicentennial
A three-hundred-year celebration is called a tricentennial.
Two hundred year anniversary, but that's not "one word".
A period of 600 years is often referred to as a sexcentenary.
Two hundred years could be called: - two centuries - twenty decades - two-hundred years
A hundred year anniversary is called a centennial or a centenary.
It is called silver or silver year.
centenary
Why is the 16th anniversary called tungsten