Although, in the West, Confirmation is usually received as a teenager, several years after making First Communion, the Catholic Church considers it the second of the three Sacraments of Initiation (Baptism being the first and Communion the third). Confirmation is regarded as the perfection of Baptism, because, as the introduction to the Rite of Confirmation states: “by the sacrament of Confirmation, [the baptized] are more perfectly bound to the Church and are enriched with a special strength of the Holy Spirit. Hence they are, as true witnesses of Christ, more strictly obliged to spread and defend the faith by word and deed”.
Because Confirmation perfects our baptism, we are obliged to receive it "in due time." Any Catholic who did not receive Confirmation at baptism or as part of his religious education during grade school or high school should contact a priest and arrange to receive the Sacrament of Confirmation.