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lar intervals to intercalate days or months.
Meton (432 B.C.) introduced a reform based
on the nineteen-year cycle. This is not the
same as the Egyptian and Chaldean eclipse
cycle called Saros of 223 lunations, or a
little over eighteen years. The Metonic cy-
cle is 235 lunations or nineteen years, af-
ter which period the sun and moon occupy
the same position relative to the stars. It
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