The Easter Triduum, the three days that begin on Holy Thursday with the Mass of the Lord's Supper, celebrates the paschal event, and that newness of life which flows from the crucified, buried and risen Christ.

Holy Saturday

The liturgical year: Beginning with the Easter Triduum as its source of light, the new age of the Resurrection fills the whole liturgical year with its brilliance. Gradually, on either side of this source, the year is transfigured by the liturgy. It really is a year of the Lord's favor...Catechism of the Catholic Church.