Confirmation is the Catholic sacrament sometimes connected with a quinceañera, but it is not the ceremony itself.
Some Catholic families arrange for the celebrant to receive Confirmation around the time of her quinceañera, especially where parish practice links the celebration with religious preparation. Confirmation is a sacrament of the Catholic Church associated with strengthening baptismal commitment and receiving the Holy Spirit.
A quinceañera Mass, when held, is a thanksgiving service or blessing rather than a sacrament. This distinction matters because the birthday celebration and the sacramental life of the church are related in some families but are not identical institutions.
Practices differ among parishes and countries. A quinceañera may be religious, secular, or a mixture of both, and a celebrant does not automatically receive Confirmation simply by having the birthday celebration.