The Triduum is known as the summit of the liturgical year. The USCCB gives us this definition:
The summit of the Liturgical Year is the Easter Triduum—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 single 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 Triduum includes the following three liturgical services: Mass of the Lord’s Supper on Holy Thursday, the Service on Good Friday, and the Mass of the Lord’s Resurrection (both Vigil and Morning Mass).
Holy Thursday morning usually includes the Chrism Mass at the Cathedral of the diocese where the Bishop of the diocese blesses the Oil of the Sick, the Oil of the Catechumens, and Sacred Chrism. (In case you were wondering, Sacred Chrism is one of my favorite smells in the whole world. )
It seems almost crazy that it is already Holy Week! Lent seems to have gone by both fast and slow. It is strange to think that we have just celebrated Palm Sunday of Passion of the Lord and that the Triduum and Easter are approaching.
My Daily Roman Missal said the following about yesterday, Palm Sunday:
On this day the Church recalls the entrance of Christ the Lord
into Jerusalem to accomplish His Paschal Mystery.
This is what the entire week is about. The whole week leads up to Good Friday when Jesus dies upon the Cross for all our sins. The whole week leads up to Holy Saturday when the Church awaits the coming Resurrection. The whole week leads up to Easter Sunday and the empty tomb.
The whole week is about the accomplishment of our redemption and the salvation of the world. This week is all about the Son of God, the Word, the Logos, the Lamb, the Son of Mary, the Christ, giving His very Life for us.