Epiphany, the Feast of the 3 Kings

Epiphany means ‘revelation’, ‘manifestation’ or ‘showing forth’ - it was the revealing of Jesus to those who were not Jewish - the magi, 3 kings, or 3 wise men were Gentiles. January 6th is the feast day

January 6th originally was used to celebrate the baptism of Jesus by John the Baptist. When Jesus received the Holy Ghost it was manifested to the people.

The 3 kings are part of the Nativity plays, along with the shepherds, which are part of the birth story of Jesus. Tradition suggests that they arrived days following Halley’s Comet, maybe weeks after, the birth of the baby Jesus.
Tradition has named them as Caspar, Melchior and Balthasar and they brought gifts of gold (kingship), frankincense (godship0 and myrrh (for burial0.

In orthodox churches Epiphany is also known as The Feast of the Holy Theophany and is important as Christmas. Special cakes are eaten in Spain, France and Mexico.
This is also the time that some children from Spain and Italy receive their Christmas presents from the 3 Magic Kings. (Read Epiphany, the Feast of The Three Kings)
( Winter swimming is even mentioned!!)

January 6th is also Twelfth Night when the Christmas decorations normally are taken down.

Sources used
Wikipedia
Church Dates for Children by Tony Batchelor