Confirmation is one of the three sacraments of initiation. Historically, it follows baptism and precedes the eucharist. Until Pope Pius X, early in the 20th century, lowered the age at which children could begin receiving Holy Communion this traditional order was followed. Before that time, children were Confirmed and admitted to Holy Communion around the age of 12. Unfortunately, the conferral of Confirmation began to move further and further away from first Communion until it became commonplace for candidates to be in high school. This required a redefining, in practice, of Confirmation as a sacrament of Christian maturity. In truth, for hundreds of years Confirmation was conferred immediately after baptism which is still the practice in Eastern Orthodox (and Catholic) parishes. We can see the echo of that practice to this very day in that all infants are Sealed with Chrism after being baptized in water. Canon law merely states that Confirmation is ordinarily conferred around the age of reason. In some dioceses, over the past 15 years or so, the conferral of Confirmation has been moved back before First Communion. All of this is to help explain why at various times and places this sacrament has been conferred on infants, seven year olds, and teenagers. All of these are legitimate practices.