The Spanish word that gives the quinceañera tradition its name by referring to the number 15 is quince.
Quince is the ordinary Spanish cardinal number for 15. The related noun quinceañera traditionally identifies a girl celebrating her fifteenth birthday, while quince años is another common name for the celebration itself. The ñ in quinceañera is pronounced as the “ny” sound in Spanish.
The term is sometimes confused with quinceañero, which can refer to a male celebrant or, in some communities, a male version of the celebration. English-language usage often uses quinceañera broadly for both the event and the honoree, although quinceañera literally has a feminine grammatical form.
The number is symbolic rather than a universal legal threshold. Customs vary by country, family, religion, and community, and many modern celebrations adapt the ceremony, music, clothing, or guest list.