Meton

Meton of Athens in Wikipedia

Meton of Athens (Greek: Μέτων ὁ Ἀθηναῖος) was a Greek mathematician, astronomer, geometer, and engineer who lived in Athens in the 5th century BCE. He is best known for the 19-year Metonic cycle which he introduced in 432 BCE into the lunisolar Attic calendar. Meton found that 19 solar years are almost equal to 235 lunar months, both totalling 6940...

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Meton in Harpers Dictionary of Classical Antiquities (1898)

(Μέτων). A Greek astronomer of Athens, who instituted in B.C. 432 the cycle of nineteen years called after him; it was intended to reconcile the lunar and the solar year: 235 lunar months of 29 or 30 days (on an average 29 25/47)=19 solar years of 365 5/19 days. This cycle was not adopted at Athens till much later, probably in B.C. 330. (See Calend...

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