Coming of age, one responsible for the commandments. At the age of thirteen for a boy and twelve for a girl, s/he obtains the age of Jewish majority and is obligated to all the commandments. Usually celebrated with an aliyah to the Torah and other festivities. In many communities both bar and bat mitzvah are celebrated at age 13. The plural of bar mitzvah is b’nei mitzvah. The plural of bat mitzvah is b’not mitzvah.