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 the family and the community. Bar mitzvah is mentioned in the Mishnah (Ethics of the Fathers, ) and in the Talmud. In some classic sources the age of 13 appears for instance as the age from which males must fast on the Day of Atonement, while females fast from the age of 12. The age of b'nai mitzvah roughly coincides with physical puberty. The bar or bat mitzvah ceremony is usually held on the first Shabbat after a boy's thirteenth and a girl's twelfth birthday (or thirteenth in Reform congregations). "Bar" () is a Jewish Babylonian Aramaic word literally meaning