Epiphany means to "Show Forth".
The season starts on the "13th Day of Christmas", January 6, with the Visitation of the Magi. They were the first non-Jews who bowed down to our Lord.
It highlights how our Lord shows Himself to be God, our Saviour:
-in the Baptism of Our Lord
-in His first miraculous sign, of water into wine
-in various healings
-in His glorious Tranfiguration