What is the usual English translation of fiesta de quince años, a name for a quinceañera?

Fiesta de quince años is usually translated as “fifteenth-birthday party.”

The phrase combines fiesta, meaning party or celebration, with de quince años, meaning of fifteen years. In natural English, “fifteenth-birthday party” conveys the meaning most directly. English speakers also commonly use quinceañera to refer to the event.

The phrase describes the occasion without requiring every traditional element. A family may celebrate with a Mass, formal meal, dance program, or simple gathering, and all can still be understood as a fiesta de quince años.

It is important not to translate the phrase as a wedding or graduation. Although the celebration may symbolize a transition and include formal clothing, it is centered on a fifteenth birthday rather than marriage or completion of school.