Why is the 6th of January an important day in the christian calendar?

Jan. 6 is Epiphany, which is the first day of the Season of Epiphany, the third of the six seasons of the church calendar. Epiphany commemorates the time when wise men from the east visited Jesus when he was a young boy and presented Him with gifts of gold, frankincense and myrrh. It is also known as Three Kings Day, although there is no known evidence that suggests that there were three of them.