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The Jewish calendar consists of 12 months annually. An extra leap month of 30 days is added every 2 or 3 years (7 leap months in 19 years) for a total of 235 lunar months in 19 years. This 19-year cycle is called the Metonic cycle and results in the 19 Jewish years approximating 19 solar years.

The Jewish holidays are always in the same season and vary by less than a month in the solar calendar. However, the approximation is not exact, and the average Jewish year is 6-7 minutes longer than the average solar year. As a result, the Jewish calendar is one day longer over approximately every 216 years. This causes a calendar drift where the holidays and seasons are gradually coming out later in the solar year.

http://www.hakirah.org/Vol%208%20Dickman.pdfThe Beginning of the Jewish Calendar

The Jewish calendar consists of 12 months annually. An extra leap month of 30 days is added every 2 or 3 years (7 leap months in 19 years) for a total of 235 lunar months in 19 years. This 19-year cycle is called the Metonic cycle and results in the 19 Jewish years approximating 19 solar years.

The Jewish holidays are always in the same season and vary by less than a month in the solar calendar. However, the approximation is not exact, and the average Jewish year is 6-7 minutes longer than the average solar year. As a result, the Jewish calendar is one day longer over approximately every 216 years. This causes a calendar drift where the holidays and seasons are gradually coming out later in the solar year.

http://www.hakirah.org/Vol%208%20Dickman.pdf

The Jewish calendar consists of 12 months annually. An extra leap month of 30 days is added every 2 or 3 years (7 leap months in 19 years) for a total of 235 lunar months in 19 years. This 19-year cycle is called the Metonic cycle and results in the 19 Jewish years approximating 19 solar years.

The Jewish holidays are always in the same season and vary by less than a month in the solar calendar. However, the approximation is not exact, and the average Jewish year is 6-7 minutes longer than the average solar year. As a result, the Jewish calendar is one day longer over approximately every 216 years. This causes a calendar drift where the holidays and seasons are gradually coming out later in the solar year.

The Beginning of the Jewish Calendar

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The Jewish calendar consists of 12 months annually. An extra leap month of 30 days is added every 2 or 3 years (7 leap months in 19 years) for a total of 235 lunar months in 19 years. This 19-year cycle is called the Metonic cycle and results in the 19 Jewish years approximating 19 solar years.

The Jewish holidays are always in the same season and vary by less than a month in the solar calendar. However, the approximation is not exact, and the average Jewish year is 6-7 minutes longer than the average solar year. As a result, the Jewish calendar is one day longer over approximately every 216 years. This causes a calendar drift where the holidays and seasons are gradually coming out later in the solar year.

http://www.hakirah.org/Vol%208%20Dickman.pdf