Ask your host what friends will be wearing. This differs from place to place. In general you should wear smart clean and modest clothes. Local custom could be formal - suits and ties, or informal - open neck shirt. If you are attending a bar mitzvah service in a synagogue you will probably be asked to wear a yarmulke (skullcap).
The Bar Mitzvah is the marking point of adulthood in a Jewish boy's life.
It is written in the Jewish bible that at age 13 a Jewish boy becomes responcible for his actions and is required to keep the 613 mitzvot (good deeds) named in the bible.
This is when the boy takes on the religious responsibilities of an adult.
A 13 year old Jewish boy reads from the Torah and is considered a man. A seder (dinner) is afterward.
It's easy: 1. Jewish boys get circumcised, Jewish girls just undergo baby naming 2. Jewish boys have BAR Mitzvahs, Jewish girls have BAT Mitzvahs 3. In Orthodox Judaism, Jewish men are in charge of the synagogue while Jewish women are in charge of the home
Girls have Bat Mitzvahs and can technically get a Mitzvah at age of 12. Boy have Bar Mitzvahs and are suppose to get them at 13. In my synagog we all get a Mitzvah at 13 give or take a week or sometimes more depending on the case.
People want not only Bar Mitzvahs but Bat Mitzvahs too because G-d commanded them to. It's from this point that a boy is old enough to take responsibility for his own actions. It's a big milestone in a boy or girls life to become bar/bat mitzvah.
A Jewish boy automatically becomes a bar mitzvah on his 13th birthday, no ceremony is required.
Wear something dressy and respectful, especially if it takes place in a synagogue. Women might want to opt for a skirt or dress rather than pants if the celebrants are Orthodox Jews. Men might feel more comfortable with their heads covered with a kippah, although this is not necessary in Reform synagogues.
In Jewish tradition, a boy does not wear a tallit intil he becomes a bar mitzvah (turns 13) as wearing a tallit is an adult obligation.
The money boy bar is a type of clothing and wear for boys.
Bar Mitzvah.