April 21 is a calendar date that occurs annually in spring in the Northern Hemisphere and autumn in the Southern Hemisphere. While the significance of April 21 varies by region and culture—with some countries marking historical events or observances on this date—it is primarily notable as a day on the calendar used worldwide to organize time and plan activities.
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April 21 is the 111th day of the year (112th in leap years) in the Gregorian calendar; 254 days remain until the end of the year.
Events
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).