Frequently Asked Questions About Good Thursday

1. What is the Paschal Triduum?
The Paschal Triduum, often called the Easter Triduum or simply the Triduum, consists of Holy Thursday, Good Friday, Holy Saturday, and Easter Sunday. This includes the Great Easter Vigil, the high point of the Triduum. The word Triduum comes from the Latin word meaning "three days." It begins the evening of Maundy Thursday and ends at Evening Prayer on Easter Sunday. Thus the Triduum consists of three full days which begin and end in the evening. The Triduum technically is not part of Lent (at least liturgically), but Holy Thursday, Good Friday, and Holy Saturday are still reckoned as part of the traditional forty day Lenten fast. The Triduum celebrates the heart of our faith and salvation: the death and resurrection of Christ, and is thus the high point of the liturgical year.

2. Why Does the Church Celebrate the Institution of the Eucharist on a Thursday?
It is long-held Tradition, based on the Biblical texts, that Jesus died on a Friday and rose from the dead on a Sunday, which would place the Last Supper on a Thursday night. Scripture tells us that Jesus rose from the dead "early on the first day of the week" (Mark 16:2, RSV). It was on the same day (the first day of the week) that Jesus met his apostles on the road to Emmaus (Luke 24:1). John also confirms that Jesus rose on a Sunday (John 20:1). The early Church Fathers universally held that Jesus rose from the dead on a Sunday, and worshiped on Sunday, "The Lord's Day." The Fathers also testify to the Institution of the Eucharist on a Thursday and a Friday crucifixion of Jesus. Even though Jesus tells us that he was to be in the belly of the earth for three days, in ancient Jewish reckoning, this included partial days, and Jesus' death spanned three days (Friday, Saturday, and Sunday). Saint Justin Martyr (writing in 150 AD) testifies to both Sunday worship and a Friday crucifixion of Jesus:

But Sunday is the day on which we all hold our common assembly, because it is the first day on which God, having wrought a change in the darkness and matter, made the world; and Jesus Christ our Saviour on the same day rose from the dead. For He was crucified on the day before that of Saturn (Saturday); and on the day after that of Saturn, which is the day of the Sun, having appeared to His apostles and disciples... (First Apology 67)

The Didache (70-90 AD) also mentions Sunday worship, and fasting on Fridays (likely connected to Jesus' crucifixion that day):

Let not your fasts be with the hypocrites... but fast on the fourth day and the Preparation (Friday)...But every Lord's day gather yourselves together, and break bread, and give thanksgiving after having confessed your transgressions, that your sacrifice may be pure (8, 14).

The Apostolic Constitutions (late 4th century) verifies the same chronology. Note that, based on Scripture, this document provides the rationale for the dates of Maundy Thursday, Good Friday, Holy Saturday, and Easter Sunday.

And on the fifth day of the week (Thursday), when we had eaten the Passover with Him, and when Judas had dipped his hand into the dish, and received the sop, and was gone out by night, the Lord said to us: "The hour is come that ye shall be dispersed, and shall leave me alone" (V:3:XIV).

...it being the day of the preparation (Friday), they delivered Him to Pilate the Roman governor, accusing Him of many and great things, none of which they could prove...[Jesus] commanded us to fast on the fourth and sixth (Friday) days of the week; the former on account of His being betrayed, and the latter on account of His passion (V:3:XIV, XV).

But when the first day of the week (Sunday) dawned He arose from the dead, and fulfilled those things which before His passion He foretold to us, saying: "The Son of man must continue in the heart of the earth three days and three nights" (V:3:XIV).

Virtually every Church Father who addresses the issue agrees with the traditional dating of a Thursday Last Supper, Friday Crucifixion, and Sunday resurrection. This includes those Church Fathers and writings mentioned above, but also Ignatius (105 AD), Pseudo-Barnabas (120 AD), Clement of Alexandria (195 AD), and many others. This chronology is firmly based on Scripture, and universally verified by Tradition.

adapted from: Churchyear