The Misa de acción de gracias associated with a quinceañera is a Catholic Mass.
Misa de acción de gracias means “thanksgiving Mass.” In Catholic families, it may be held before or alongside the social celebration to give thanks for the celebrant’s life and to ask for guidance as she enters a new stage. The exact liturgy depends on the parish and local practice.
The religious service is separate from the reception, even when both are planned as one event. Some families include a church ceremony, while others hold a secular celebration or adapt the tradition according to their beliefs.
Catholic association explains why priests, churches, sponsors, and religious symbols may appear in descriptions of quinceañeras. It does not mean every quinceañera is Catholic or that a Mass is required. The tradition is practiced in many cultural and religious settings with considerable variation.