The calendar of the Extraordinary Form contains a number of features not found in the Ordinary Form, notably the season of Septuagesima, the number and treatment of vigils, and the number of octaves. These very ancient features of the calendar allowed the Faithful to enter more deeply into the mysteries presented by the Church’s year by facilitating their preparation for and subsequent meditation upon those mysteries. They also contributed to a liturgical cycle characterised by sharper contrasts of penitential and joyful days and seasons. . . .