The Spanish word for a girl celebrating her fifteenth birthday in this tradition is quinceañera.
The term comes from quince, meaning “fifteen,” and añera, a feminine form related to years or age. It refers both to the celebrant and, in many contexts, to the celebration itself. A quinceañera is therefore not simply a birthday party, although the event often includes birthday-style elements such as a cake, gifts, music, and dancing.
The custom is especially associated with Mexico, Central America, South America, the Caribbean, and Latino communities elsewhere. Practices vary widely by family, country, religion, and budget. Some celebrations include a church service, while others are entirely secular.
A common mix-up is treating quinceañera as the name of one fixed ceremony. In reality, the word describes a broad cultural tradition with many regional forms and no single universally required program.