Catholicism is the religious tradition most commonly associated with a special Mass during a quinceañera.
Many Catholic families begin the celebration with a Misa de acción de gracias, or Mass of thanksgiving. During the service, the honoree may receive a blessing and publicly express gratitude for her life and family. The exact wording and customs depend on the parish and local tradition.
The religious service is not required for every quinceañera. Some families hold a secular ceremony, while others celebrate with a party only. The custom has also been adapted by families from different Christian backgrounds and by people who treat the event primarily as a cultural tradition.
A quinceañera should therefore not be confused with a sacrament. It is a cultural birthday observance, and the Mass is an optional religious component rather than the definition of the celebration.