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The original was posted on /r/todayilearned by /u/gonejahman on 2025-01-01 02:48:54+00:00.

Original Title: TIL medieval England began adopting the A.D. system in the 8th century, influenced by Saint Bede’s work on the dating of Easter and his Ecclesiastical History, with wider adoption across Europe after Charlemagne’s 9th-century coronation.