The Feast of the Birth of the Blessed Virgin Mary has been celebrated in the Church at least since the 8th Century. The Church's calendar observes the birthdays of only two saints: Saint John the Baptist (June 24), and Mary, Mother of Jesus. The birth of Mary was also miraculous. She was conceived without sin as a special grace because God had selected her to become the mother of His Son (the feast of her Immaculate Conception is celebrated on December 8). The dogma of the Immaculate Conception of the Virgin Mary, though generally believed throughout the Church for many centuries, was formally declared by Pope Pius IX in 1854.
