A BAT Mitzvah is a Jewish coming-of-age ceremony for girls, typically celebrated when they turn 12 or 13 years old. It is a RITE of passage that marks the transition from childhood to adulthood. The term 'BAT Mitzvah' is derived from two Hebrew words: 'BAT, ' meaning daughter, and 'mitzvah, ' meaning commandment. During the ceremony, the GIRL reads from the Torah and leads a service in front of her family and friends.