Royal christening Sunday will be traditional and unique in some ways, and a boon to royal fans and media.

Source: Guide: Princess Charlotte’s christening

“Christening” refers to a child receiving his or her Christian name at the time of Baptism, a Sacrament in the Church of England as well as other historic, liturgical churches. Most Christians view Baptism as an act of God conducted through His Church, which washes away sins and bestows the Holy Spirit. Churches that do not baptize infants often refer to the rite as an “ordinance.” They see Baptism more as an act of the individual expressing his or her faith.