The Liturgical Year
The Liturgical Year is the celebration throughout the year of the mysteries of the Lord's birth, life, death, and Resurrection in such a way that the entire year becomes a "year of the Lord's grace." Thus the cycle of the liturgical year and the great feasts constitute the basic rhythm of the Christian's life of prayer, with its focal point at Easter.
In the liturgical year, the various aspects of the one Paschal mystery unfold. This is also the case with the cycle of feasts surrounding the mystery of the Incarnation (Annunciation, Christmas, Epiphany). They commemorate the beginning of our salvation and communicate to us the fruits of the paschal mystery. (CCC1171)