Rabbinical Calendar
KDateJS - Abu Mami's Javascript Hebrew Date Display
The Hebrew date is:
13 Tammuz 5765
The corresponding civil dates are:
July 19, 2005 (the night of)
July 20, 2005
Metonic Cycle
The Metonic Cycle is a period of about 6939.6 days, the approximate length of both 235 consecutive lunations and 19 solar years. Knowledge of this cycle is important in determining when to assign intercalary months to lunisolar calendars.
Meton, an Athenian who lived in the middle of the fifth century B.C., is the cycle's namesake. Meton himself referred to it in a publication as the nineteen-year cycle. There is some question as to whether Meton discovered it on his own or whether he learned of it from Babylonian sources, because it was discovered there about fifty years before Meton's time. Lunisolar calendars will roughly keep in step with seasons if a thirteenth month is added to them in seven out of each 19 years. In order to do this almost perfectly, there should be an additional one-day correction after each 222 years.
See Also
Hebrew Calendar Science and Myths
