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
Today I Am a Clown and he tells them of his problem. Bart and Lisa wonder how Krusty could not have had a Bar Mitzvah, especially considering that his own father is a rabbi. They go to Rabbi Hyman Krustofsky to ask why Krusty never had a Bar Mitzvah, and Hyman reveals that it was because he was afraid that Krusty would make a mockery of the whole ceremony. Lisa points out that Krusty can still have his Bar Mitzvah as an adult, as there is nothing in Judaism that forbids it. Hyman agrees to help his son reach his goal, teaching him all about