Crossword clue: a special anniversary (or the celebration of it)
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
a special anniversary (or the celebration of it)
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Similar clues
the 300th anniversary (or the celebration of it)
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→ tercentenary, tercentennial, triennial