" . . . the American rabbi Mordecai M. Kaplan, who held the first public celebration of a bat mitzvah in the United States, for his daughter Judith, on March 18, 1922, at the Society for the Advancement of Judaism, his synagogue in New York City . . . " https://en.wikipedia.org/wiki/Bar_and_bat_mitzvah#Bat_Mitzvah_customs