An adult bar/bat mitzvah is a bar or bat mitzvah of a person older than the customary age. Traditionally, a bar or bat mitzvah occurs at age 13 and 12 for boys and girls respectively. But many adult Jews who have never had a bar or bat mitzvah choose to have one later in life, and many who have had one at the traditional age choose to have a second. An adult bar or bat mitzvah can be held at any age after adulthood is reached and can be performed in a variety of ways.