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
Who is a Jew? are given male names and that biblical characters are always referenced by their fathers' names. However, a minority of modern Karaites believe that Jewish identity requires that both parents be Jewish, and not only the father. The divergence of views has become an issue because Orthodox and Conservative communities do not recognize a person as Jewish if only their father is Jewish. For the person to be accepted as Jewish by an Orthodox or Conservative community (for example, on an occasion of their bar/bat mitzvah or marriage), they require a formal conversion (in accordance with halakhic standards). Orthodox Judaism has