In the Catholic Liturgical Calendar, we will see the dates of the feast of a saint and important seasons such as Lent and Advent. The feast date of a Saint is the date when he or she departed from this world and entered the Kingdom of God in Heaven. But some feast dates are not the dates of their deaths, such as the feast date of the married couple Saint Zelie and Saint Louis Martin. Saint Therese of Lisieux’ feast day was put on October 3 even though she died on September 30, because the date was already the feast day of Saint Jerome, until it was moved to December 1 on 1970. But there are three unique occasions or feasts that are celebrated in the Catholic Church, these are the nativity or birthday of three persons, the Nativity of our Lord Jesus Christ, the Nativity of the Blessed Virgin Mary and the Nativity of Saint John the Baptist.