One of the chief ways that the Church teaches and reteaches the deposit of Faith is through its liturgical cycle.
The calendar of the Church, which takes its point of departure from the natural seasons, the Old Law and the New, stretches out over a twelve-month period the divine things that are present in a condensed form in every single Mass.
This distension of the mysteries over the course of a year allows the faithful to appropriate, gradually and solemnly, the deeper meaning of their faith. Just as the observant eye learns how to read the inner workings of nature from the changing signs of the season, so too does the pious eye learn the essence of supernature from the rhythms of the liturgical calendar.
The Church calendar is a book, a book filled with mystagogical signs and hints which, if read properly and attentively, disclose the full light of Christian wisdom.
What is more, reading this "book" precipitates an annual renewal of, or re-initiation into, the whole of our Christian faith, from our fall into sin to our redemption in Christ, from our faltering attempts at holiness to our joyful if not anxious anticipation of contemplating God face to face.