The term Hebrew Month, First can be represented by two crossword solutions: Tishri (6 letters) and Tisri (5 letters). Tishri is the first month of the Jewish civil year, which usually falls in September or October. It is the seventh month of the ecclesiastical year and is the only month that has 30 days. Tisri is the first month of the Jewish religious year, which usually falls in September or October. It is the seventh month of the ecclesiastical year and is the only month that has 29 days.