Bar and Bat Mitzvah to the event. However, this does not delay the onset of rights and responsibilities of being a Jewish adult which comes about strictly by virtue of age. The obligation to lay tefillin begins when a boy reaches bar mitzvah age. The common custom is for the bar mitzvah boy to begin putting on tefillin one to three months before his bar mitzvah. This way, by the time he is obligated in the commandment, he will already know how to fulfill it properly. The first mention of a party associated with a synagogue bar mitzvah was in the 13th century, so
Bar and Bat Mitzvah siddur. In some Modern Orthodox circles, bat mitzvah girls will read from the Torah and lead prayer services in a women's tefillah. Rabbi Moshe Feinstein, a prominent Orthodox "posek," has ruled that bat mitzvah celebrations are permissible, but should not be held in a synagogue, because then they would be construed as imitating Reform and Conservative customs; in any case, they do not have the status of seudat mitzvah. Rabbi Ovadiah Yosef holds that it is a seudat mitzvah. There were occasional attempts to recognize a girl's coming of age in eastern Europe in the 19th and 20th centuries, the