September 23 is the 266th day of the year in the Gregorian calendar (or the 267th day in leap years). It marks the approximate date of the autumnal equinox in the Northern Hemisphere, when day and night are nearly equal in length.
AI-generated from the Wikipedia summary — may contain errors.
September 23 is the 266th day of the year (267th in leap years) in the Gregorian calendar; 99 days remain until the end of the year.
Events
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).