In just a few hours the Triduum begins with the Evening Mass of the Lord’s Supper. The Triduum (3 days) is really one liturgy which ends with Evening Prayer on Easter (sundown).

“Only one Mass is celebrated on Holy Thursday.  This special Mass, the Mass of the Lord’s Super takes place in the evening.  It is during this Mass that we remember three fundamental mysteries of our Christian Faith. 

First, we remember the gift of the Catholic priesthood. Secondly, we remember the gift of the Eucharist.  Thirdly, with the Washing of the Feet ceremony, we remember the mandate of the new commandment of love.  As a Christian people we are to live our lives with selfless love for all. 

At the conclusion of this beautiful Mass, we process solemnly to the Altar of Repose.  It is there where the Eucharist remains for our adoration until midnight.  We accompany Jesus as he begins his Passion.  We pray in reparation for our own personal sins and the sins of the world.”Catholic Online

The achingly beautiful Holy Thursday Chant, Pange Lingua.

Sing, my tongue, the Savior’s glory,
of His flesh the mystery sing;
of the Blood, all price exceeding,
shed by our immortal King,
destined, for the world’s redemption,
from a noble womb to spring.

Of a pure and spotless Virgin
born for us on earth below,
He, as Man, with man conversing,
stayed, the seeds of truth to sow;
then He closed in solemn order
wondrously His life of woe.

On the night of that Last Supper,
seated with His chosen band,
He the Pascal victim eating,
first fulfills the Law’s command;
then as Food to His Apostles
gives Himself with His own hand.

Word-made-Flesh, the bread of nature
by His word to Flesh He turns;
wine into His Blood He changes;
what though sense no change discerns?
Only be the heart in earnest,
faith her lesson quickly learns.

Down in adoration falling,
This great Sacrament we hail,
Over ancient forms of worship
Newer rites of grace prevail;
Faith will tell us Christ is present,
When our human senses fail.

To the everlasting Father,
And the Son who made us free
And the Spirit, God proceeding
From them Each eternally,
Be salvation, honor, blessing,
Might and endless majesty.
Amen. Alleluia