What is the Triduum?

 
The word “Triduum” is a Latin word meaning “three days.” According to the United States Conference of Catholic Bishops, the Triduum is “the summit of the Liturgical Year — from the evening of Holy Thursday to the evening of Easter Sunday. Though chronologically three days, they are liturgically one day unfolding for us the unity of Christ's Paschal Mystery. The celebration of the Triduum marks the end of the Lenten season, and leads to the Mass of the Resurrection of the Lord at the Easter Vigil.”  The liturgical services that take place during the Triduum are:  Mass of the Lord's Supper, Good Friday of the Lord's Passion, and Mass of the Resurrection of the Lord.