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  "path": "/language/once-in-a-blue-moon-origin?utm_source=RSS",
  "publishedAt": "2026-04-02T16:00:00.000Z",
  "site": "https://www.mentalfloss.com",
  "textContent": "The origins of the phrase \"once in a blue moon\" are rooted in an anti-Roman clergy pamphlet and a volcanic explosion in Indonesia.",
  "title": "Where Does the Phrase \"Once in a Blue Moon\" Come From?"
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