Why Does the Church Celebrate the Triduum on a Thursday, Friday, Saturday, and Sunday?
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 heart of the earth for three days and three nights, in ancient Jewish reckoning, this included partial days. Thus, Jesus was saying that his time in the earth would span three days (Friday, Saturday, and Sunday).
