Fr. Peter J. Thornberg of St. Sophia Greek Orthodox church blesses the waters of the Schuylkill River just minutes away from his church, while his congregation looks on. Epiphany day, which traditionally falls on January 6, is a Christian feast day that celebrates the revelation of the Son of God as a human being in Jesus Christ. Eastern Christians commemorate the baptism of Jesus in the Jordan River, seen as his manifestation to the world as the Son of God.