What is a Quinceañera?

The quinceañera is a traditional celebration of life and gratitude to God on the occasion of the fifteenth birthday of a young Hispanic woman. The ritual emphasizes her passage from childhood to adulthood. The family usually requests a Mass or a blessing to be held in the Church. The rite is frequently celebrated in several countries in the Americas, including Mexico, Central and South America and the Caribbean. It is frequently requested by Hispanic Catholics in the dioceses of the United States of America.

(US Conference of Catholic Bishops)