Adar II n. Hebrew (ah-DAR TWO) Seven times in every 19 years, an extra month is inserted in the Jewish calendar, creating a leap year. Adar II comes after the month of Adar, in March or April.
Eisenberg, J., Scolnic, E., & Jewish Publication Society. (2001). The JPS dictionary of Jewish words. Over 1000 entries for Jewish holidays and life-cycle events, culture, history, the Bible and other sacred texts, and worship. Each entry has a pronunciation guide and is cross-referenced to related terms.; “A JPS desk reference”–cover. (2). Philadelphia, PA: Jewish Publication Society.