In Spanish, quinceañero traditionally refers to a boy celebrating his fifteenth birthday.
The term is the masculine counterpart of quinceañera, which traditionally refers to a girl reaching the same milestone. Both words derive from quince, the Spanish word for fifteen, and are connected with the broader tradition of marking a fifteenth birthday.
In English-language usage, quinceañera is often used as the name of the celebration itself, even when the honoree is the focus. Spanish usage distinguishes the masculine and feminine forms more clearly, although families and communities may adapt the terminology.
A quinceañero celebration can include many elements associated with quinceañeras, but there is no single required format. The details depend on local customs and the preferences of the family.