- 100th anniversary - Entrance made by youth leader at landmark anniversary - Hundred years - One hundredth anniversary - Relating to, or consisting of, a hundred. - Occurring once in every hundred years; centennial. - The aggregate of a hundred single things; specifically,
a century.
- 100th anniversary - Of or pertaining to two hundred, esp. to two hundred
years; as, a bicentenary celebration. - The two hundredth anniversary, or its celebration.