- the sixth month of the Jewish calendar: called Adar II or Adar Sheni in leap years, when Adar I is added to the calendar.
- (in the Jewish calendar) the twelfth month of the year according to biblical reckoning and the sixth month of the civil year, usually falling within February and March. In a leap year, an additional month Adar Rishon (first Adar) is intercalated between Shevat and Adar, and the latter is known as Adar Sheni (second Adar)
