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Anniversary Names
Anniversaries are often given names to represent their numbers. Here are some of the most commonly accepted names.
| Year |
Anniversary
Name |
| 2nd |
Biennial |
| 3rd |
Triennial |
| 4th |
Quadrennial |
| 5th |
Quinquennial |
| 6th |
Hexennial |
| 7th |
Septennial |
| 8th |
Octennial |
| 9th |
Novennial |
| 10th |
Decennial |
| 11th |
Hendecennial |
| 12th |
Duodecennial |
| 13th |
Tredecennial |
| 15th |
Quindecennial |
| 16th |
Sextodecennial |
| 17th |
Septendecennial |
| 20th |
Vigintennial |
| 30th |
Trigentennial |
| 40th |
Quadragennial |
| 50th |
Quinquagenary
or Jubilee |
| 60th |
Sexagennial |
| 70th |
Septuagennial |
| 75th |
Septuagesiquintennial |
| 80th |
Octogintennial |
| 90th |
Nonagintennial |
| 100th |
Centennial |
| 125th |
Quasquicentennial |
| 150th |
Sesquicentennial |
| 175th |
Septaquintaquinquecentennial |
| 200th |
Bicentennial |
| 225th |
Quasquibicentennial |
| 250th |
Semiquincentennial |
| 300th |
Tercentennial |
| 350th |
Semiseptcentennial |
| 400th |
Quatercentenary |
| 500th |
Quincentennial |
| 600th |
Sexcentennial |
| 700th |
Septcentennial |
| 800th |
Octocentennial |
| 1,000th |
Millenial |
| 15,000th |
Quindecimillenial |
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