March 21 is the 80th day of the year in the Gregorian calendar, marking the spring equinox in the Northern Hemisphere when day and night are approximately equal in length. It is observed in many cultures and religions as a significant date, including as the International Day of Forests and Persian New Year (Nowruz).
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March 21 is the 80th day of the year (81st in leap years) in the Gregorian calendar; 285 days remain until the end of the year.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).