The Catholic Christmas season officially ends on January 6th, which is known as the Feast of the Epiphany. The Feast of the Epiphany is also known as "Three Kings Day" or "Little Christmas," and it celebrates the arrival of the Wise Men who followed the star to find the baby Jesus. The Christmas season begins on December 25th and ends on January 6th, making it a 12-day celebration of the birth of Christ.