The Mass of the Lord’s Supper is the first liturgy of the Easter Triduum, celebrated on the evening of Holy Thursday at 7pm. It commemorates the institution of the Eucharist, the priesthood, and Christ’s commandment of love and service. This Mass is a profound and solemn moment in the Church’s liturgical year, marking the beginning of the Paschal Mystery - the passion, death, and resurrection of Jesus Christ..