The Spanish number in “quinceañera” is quince, meaning 15.
The term is built from the Spanish word quince, “fifteen,” and a feminine ending associated with the female celebrant. In everyday usage, quinceañera can describe the young woman, the party, or the broader tradition, depending on context.
Spanish spelling uses the letter ñ in quinceañera. That character distinguishes ñ from n and is pronounced as a palatal nasal sound, similar to the sound in the Spanish word año, meaning “year.”
The related phrase fiesta de quince años literally means “party of fifteen years.” English-language communities often use quinceañera even when the celebration includes local customs, bilingual announcements, or nonreligious elements.