Epiphany, also known as Theophany in Eastern Christian traditions, is a Christian feast day that celebrates the revelation of God incarnate as Jesus Christ.
In Western Christianity, the feast commemorates principally (but not solely) the visit of the Three Kings or Three Wise men to the Christ Child. The feast of the Epiphany, in some denominations, also initiates the liturgical season of Epiphanytide.
Eastern Christians, on the other hand, commemorate the baptism of Jesus in the Jordan River, seen as his manifestation to the world as the Son of God.
The traditional date for the feast is January 6. However, since 1970, the celebration is held in some countries on the Sunday after January 1. Those Eastern Churches which are still following the Julian calendar observe the feast on what, according to the internationally used Gregorian calendar, is January 19.