1. Semicentennial
-50th Anniversary
2. Centennial
-100th Anniversary
3. Sesquicentennial
-150th Anniversary
4. Bicentennial
-200th Anniversary
5. Tricentennial
-300th Anniversary
6. Tetracentennial
-400th Anniversary
7. Pentacentennial
-500th Anniversary
8. Hexacentennial
-600th Anniversary
9. Biennial
-Occurring Once In Two Years
10. Triennial
-Occurring Once In Three Years
11. Quadrennial
-Occurring Once In Four Years
12. Quinquennial
-Occurring Once In Five Years
13. Sexennial
-Occurring Once In Six Years
14. Septennial
-Occurring Once In Seven Years
15. Octennial
-Occurring Once In Eight Years
16. Decennial
-Occurring Once In Ten Years