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 Bar and Bat Mitzvah Bar Mitzvah () is a Jewish coming of age ritual for boys. Bat Mitzvah (; Ashkenazi pronunciation: "Bas Mitzvah") is a Jewish coming of age ritual for girls. The plural is "B'nai Mitzvah" for boys, and "B'not Mitzvah" (Ashkenazi pronunciation: "B'nos Mitzvah") for girls. According to Jewish law, when Jewish boys become 13 years old, they become accountable for their actions and become a bar mitzvah. A girl becomes a bat mitzvah at the age of 12 according to Orthodox and Conservative Jews, and at the age of 13 according to Reform Jews. Prior to reaching