Who started bat mitzvahs?

Answer 1

The Bat Mitzvah, a coming-of-age ceremony for Jewish girls, emerged in the early 20th century, with its roots in earlier Jewish tradition. While the concept of a Bat Mitzvah was not formally codified until the 1920s, it became more widely practiced after Rabbi Mordecai Kaplan, a key figure in the Reconstructionist movement, introduced it at his synagogue in New York in 1922. The ceremony marks a girl's transition into religious adulthood, similar to the Bar Mitzvah for boys.