The search results suggest that the question is related to a crossword puzzle clue. The clue is "What a school might have once a year" and it has 9 letters. The search results provide several websites that offer possible solutions to the clue, but they do not provide a definitive answer. Some of the websites that offer possible solutions include Dan Word, Wordplays, and Ultimate Success Puzzle). The search results also include an article from The New York Times that provides tips on how to solve crossword puzzles. However, the article does not provide any information on the specific clue in question. Therefore, based on the search results, it is not possible to provide a definitive answer to the question.