What is the quinceañera’s specially celebrated birthday in Spanish called?

The specially celebrated birthday is called a fiesta de quince años in Spanish.

The phrase literally means “party of fifteen years,” making the age milestone explicit. It is a common alternative to quinceañera, especially when referring to the event rather than the girl who celebrates it.

Shorter forms are also widespread. Speakers may say fiesta de quince or simply quince, depending on region and context. English-language communities frequently use quinceañera as an umbrella term for both the celebrant and the party.

These expressions describe a family and cultural tradition, not a single legally defined ceremony. The exact program may include a mass, formal entrance, dances, speeches, or a meal, but families can choose which customs fit their beliefs and circumstances.