The Catholic Church has designated the four weeks preceding Christmas as Advent, a time to prepare the way of the Lord for His coming as our King and Savior. In addition, the Church teaches that:
when the Church celebrates the liturgy of Advent each year, she makes present this ancient expectancy of the Messiah, for by sharing in the long preparation for the Saviors first coming, the faithful renew their ardent desire for his second coming. By celebrating [John the Baptists] birth and martyrdom, the Church unites herself to his desire: He must increase, but I must decrease (Catechism, no. 524; original emphasis).
By participating in various time-honored traditions, such as making Jesse trees or putting on a Christmas play at home, Catholic families can engage more fruitfully in the seasons of Advent and Christmas