A period of 19 years which almost exactly equals 235 synodic months. The Hebrew calendr is based on the Metonic cycle and has 7 years with 13 months and 12 years with 12 months.

" Cycle métonique" A period of almost 19 years (i.e.235 lunations) created by the Athenian astronomer Meton (5th century BC), to obtain a period in which new and full Moon recur on the same day.

The 19 year cycle wherein the conjunctions of the Sun and Moon begin to appear progressively in the zodiac in the same places as in the previous cycle. Discovered by Meton of Athens. This is the cycle whereby the solar and lunar calendars can be approximately synchronised.

A 19 year cycle which determines which years are leap years and which are common years. The 3rd, 6th, 8th, 11th, 14th, 17th and 19th years of this cycle are leap years.

A time equal to 19 years, or 235 synodic months, after which the phases of the Moon repeat themselves on the same calendar dates.

Period of 235 lunations or about 19 years. devised by Meton, an Athenian astronomer (5th century B.C.) for the purpose of obtaining a period at the end of which the phases of the moon recur in the same order and on the same days as in the preceding cycle.

A period of about 6939.6 days, which is the approximate length of both 19 tropical years and 235 lunations. moon phases repeat on about the same ordinal day in each 6939.6-day period. Because of this, many lunar calendars provide for 7 intercalated months within every 19 years.

A period of almost 19 years or 235 lunations. Devised by Meton, an Athenian astronomer who lived in the fifth century B.C., for the purpose of obtaining a period in which new and full Moon would recur on the same day of the year. Taking the Julian year of 365.25 days and the synodic month as 29.530,588 days, we have the l9-year period of 6,939.75 days as compared with the 235 lunations of 6,939.69 days, a difference of only 0.06 day.

The nineteen-year cycle named for the Athenian astronomer Meton who discovered (ca. 432) that the new Moon occurs on the same day of the year at approximate nineteen-year intervals.

Every 6939.6 days (19 years), the same lunar phase recurs on the same day of the year. This time period is known as the Metonic cycle. During each cycle, there are exactly 235 lunations.

The Metonic cycle or Enneadecaeteris in astronomy and calendar studies is a particular approximate common multiple of the year (specifically, the seasonal i.e. tropical year) and the synodic month. Nineteen tropical years differ from 235 synodic months by about 2 hours. The Metonic cycle's error is one full day every 219 years, or 12.4 parts per million.