As of September 15, 2023, the Jewish year is 5784. The Jewish calendar is a lunar/solar calendar, with months based on lunar months and years based on solar years. It is the official calendar in Israel and is used in synagogues to mark the weekly Torah portions and other significant events. The Jewish year counts up from the “calculation” of when the Earth was created. Rosh Hashanah, the Jewish New Year, began on September 15, 2023, and ended on September 17, 2023.