The Jewish Calendar
Updated February 21, 2017 | Factmonster Staff 
The Jewish calendar is based on both solar and lunar years. The average lunar year of about 354 days is adjusted to the solar year by the addition of a leap year and an intercalary month. Nisan is considered the first month, although the new year begins with Rosh Hashanah, on the first of Tishri, which is in fact the seventh monthâthe calendar has different starting points for different purposes. The year 2008 translates to the Jewish year 5768â5769. The year 2009 translates to the Jewish year 5769â5770.
| Month | Number of days |
|---|---|
| Nisan (MarchâApril)* | 30 |
| Iyar (AprilâMay) | 29 |
| Sivan (MayâJune) | 30 |
| Tammuz (JuneâJuly) | 29 |
| Av (JulyâAug.) | 30 |
| Elul (Aug.âSept.) | 29 |
| Tishri (Sept.âOct.) | 30 |
| Heshvan (Oct.âNov.) | 29 |
| in some years | 30 |
| Kislev (Nov.âDec.) | 29 |
| in some years | 30 |
| Tevet (Dec.âJan.) | 29 |
| Shevat (Jan.âFeb.) | 30 |
| Adar (Feb.âMarch) | 29 |
| in some years | 30 |
| Adar Sheni | 29 |
| (intercalary month in leap year only) |
*The months correspond approximately to those of the Gregorian calendar.
