Holy Thursday

Every year, the Church celebrates the great mysteries of the redemption of mankind in the "most sacred Triduum of the crucifixion, burial and resurrection". The Sacred Triduum extends from the Mass of the Lord's Supper to Vespers on Easter Sunday and is celebrated "in intimate communion with Christ her Spouse". — Directory on Popular Piety

Holy Thursday is also known as "Maundy Thursday." The word maundy comes from the Latin word mandatum (commandment) which is the first word of the Gospel acclamation:

Mandátum novum do vobis dicit Dóminus, ut diligátis ínvicem, sicut diléxi vos: "I give you a new commandment: Love one another as I have loved you." (John 13:34)These are the words spoken by our Lord to His apostles at the Last Supper, after he completed the washing of the feet. We should imitate Christ's humility in the washing of the feet.

By meditating on the Gospels (cf. Matt 26:1 ff.; Mark 14:1 ff.; Luke 22:1 ff.; John 13:1 ff.), we can recall to mind Jesus' actions of that day. Father Bernard Strasser summarizes all the events of that first Holy Thursday:

...They included: (1) The eating of the Easter lamb or the paschal meal; (2) The washing of the disciple's feet; (3) The institution of the Most Holy Eucharist (the first Mass at which Jesus Christ, the eternal high priest, is the celebrant; the first Communion of the apostles; the first conferring of Holy Orders); (4) The foretelling of Judas' betrayal and Peter's denials; (5) The farewell discourse and priestly prayer of Jesus; (6) The agony and capture of Jesus in the Garden of Olives. all the German speaking countries, Slavic nations and in Hungary this day is also known as "Green Thursday." The word is a corruption of the German word grunen (to mourn) to the German word for green (grün). Many people believe they must eat green at today's meal, which probably derives from from the Jewish Passover meal that included bitter herbs.

[The Station today is at St. John Lateran. Maundy Thursday is devoted to the institution of the Eucharist and the priesthood. On this day the bishop blesses the Holy Oils; thus is made clear that the sacraments have their source in Christ and derive their fruitfulness from the paschal mystery of salvation.]

Chrism Mass

There are only two Masses allowed on Holy Thursday -- the Chrism Mass and the evening Mass of the Lord's Supper. In each diocese there is a Chrism Mass or Mass of the Holy Oils, usually said in the morning at the cathedral of the diocese. Catholics should make an effort to participate at the Mass at least once in their lives, to experience the communion of priests with their bishop. All the priests of the diocese are invited to concelebrate with the bishop. The holy oils to be used throughout the diocese for the following year in the sacraments of Baptism, Confirmation, Holy Orders and the Sacrament of the Sick are blessed by the bishop at this Mass. This Mass also celebrates the institution of the priesthood.

Mass of the Lord's Supper

During the evening of Holy Thursday, the Mass of the Lord's Supper is celebrated. It is celebrated in the evening because the Passover began at sundown. There is only one Mass, at which the whole community and priests of the parish participate. This is a very joyful Mass, as we recall the institution of the Holy Eucharist and the priesthood. The priests wear white vestments, the altar is filled with flowers, the Gloria is sung and the bells are rung. After the Gloria, we shall not hear organ music and the bells until the Easter Vigil. The Liturgy of the Mass recalls the Passover, the Last Supper, which includes the Washing of the Feet. The hymn Ubi Caritas or Where Charity and Love Prevail is usually sung at this time. After the Communion Prayer, there is no final blessing. The Holy Eucharist is carried in procession through Church and then transferred into a place of reposition, usually a side chapel. The hymn Pange Lingua is also usually sung at this time.

After the Mass, we recall the Agony in the Garden, and the arrest and imprisonment of Jesus. The altar is stripped bare, crosses are removed or covered. The Eucharist has been placed in an altar of repose, and most churches are open for silent adoration, to answer Christ's invitation "Could you not, then, watch one hour with me?" (Matt 26:40)

The Altar of Repose

When the Eucharist is processed to the altar of repose after the Mass of the Lord's Supper, we should remain in quiet prayer and adoration, keeping Christ company. There is a tradition, particularly in big cities with many parishes, to try and visit seven churches and their altar of repose during this evening.

Popular piety is particularly sensitive to the adoration of the Most Blessed Sacrament in the wake of the Mass of the Lord's supper. Because of a long historical process, whose origins are not entirely clear, the place of repose has traditionally been referred to as "a holy sepulchre". The faithful go there to venerate Jesus who was placed in a tomb following the crucifixion and in which he remained for some forty hours.

It is necessary to instruct the faithful on the meaning of the reposition: it is an austere solemn conservation of the Body of Christ for the community of the faithful which takes part in the liturgy of Good Friday and for the viaticum of the infirmed. It is an invitation to silent and prolonged adoration of the wondrous sacrament instituted by Jesus on this day.

In reference to the altar of repose, therefore, the term "sepulchre" should be avoided, and its decoration should not have any suggestion of a tomb. The tabernacle on this altar should not be in the form of a tomb or funerary urn. The Blessed Sacrament should be conserved in a closed tabernacle and should not be exposed in a monstrance.

After mid-night on Holy Thursday, the adoration should conclude without solemnity, since the day of the Lord's Passion has already begun.

— Directory on Popular Piety

-Information from CatholicCulture.com

(Source: Ma Beck at Ward Wide Web)