fl. fifth century B.C. Athenian astronomer who introduced the 19-year luni-solar calendric cycle known today as the Metonic cycle—the period after which the Moon's phases recur on the same day of the year. Possibly influenced by a similar...

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...