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Clue: "The change from Julian to Gregorian ... or what would be needed to make 20-, 31- and 40-Across possible?"
"The change from Julian to Gregorian ... or what would be needed to make 20-, 31- and 40-Across possible?" is a New York Times crossword puzzle clue that we have seen 1 time.
Possible answer
Recent usage in crossword puzzles
- New York Times - October 9, 2017