At which New York synagogue did Judith Kaplan Eisenstein have the first widely recognized American bat mitzvah?

Judith Kaplan Eisenstein had the first widely recognized American bat mitzvah at the Society for the Advancement of Judaism in New York City.

The ceremony took place in 1922. Kaplan Eisenstein was the daughter of Rabbi Mordecai M. Kaplan, the founder of Reconstructionist Judaism and the congregation’s leader. Her bat mitzvah helped establish a public model for marking Jewish religious maturity for girls in the United States.

The ceremony was more limited than many modern bat mitzvah celebrations. Kaplan Eisenstein reportedly read a passage from the Prophets rather than leading the full Torah service in the way many girls do in contemporary egalitarian congregations. This distinction is an important historical detail: the event is widely recognized as a landmark, but practices varied substantially among Jewish movements.

The Society for the Advancement of Judaism remains closely associated with the early development of American Reconstructionist Judaism. Later, Conservative, Reform, Reconstructionist, and other egalitarian communities expanded opportunities for girls and women to participate publicly in Torah reading and synagogue leadership.