What happens on Three Kings Day?

Epiphany, (Koine Greek: ἐπιφάνεια, epiphaneia, "manifestation", "striking appearance",[1]) or Theophany, (Ancient Greek (ἡ) Θεοφάνεια, Τheophaneia,[2]) meaning "vision of God",[3] is a Christian feast day that celebrates the revelation of God the Son as a human being in Jesus Christ.