Matthew 26: 17-19, and Parallels
Meanwhile, on Thursday, Jesus arranged for the celebration of the passover in company with the apostles. The passover feast commemorated the deliverance of Israel from Egypt, especially the passing over of Israel's first-born when the first-born sons of the Egyptians were slain. The feast was opened on the evening of Nisan 14, Nisan being a spring month, and the first month of the Jewish year. According to Jewish reckoning, the evening of Nisan 14 constituted the beginning of Nisan 15. Starting from that time, the feast continued for seven days, no unleavened bread being used within that period. The first and most solemn act of the whole feast was the eating of the paschal lamb on the evening of Nisan 14.
This passover supper was celebrated by Jesus and the apostles on Thursday evening, Nisan 14. And the feast was to be continued into the Christian era. The symbols were changed; bread and wine were to be used instead of the paschal lamb. But the fundamental meaning of the feast remained the same; both the passover and the Lord's Supper had reference to the atoning death of Christ. The paschal lamb prefigured the Lamb of God who was to die for the sins of the world; the bread and wine also symbolized the body of Christ broken for us and the blood of Christ poured out for the remission of our sins. Thus what the passover symbolized by way of prophecy is symbolized in the Lord's Supper by way of commemoration. And on that last evening our Lord changed the symbols in order to suit the new dispensation when, since the Lamb of God had once been offered up, other sacrifices should be no more.
Matthew 26:20-35, and Parallels
Jesus gathered with his apostles for the feast in an upper room. Matt. 26:20, and parallels. Then, lamentably enough, there was a strife among the apostles as to who should be the greatest. Luke 22:24–30. As a rebuke of all such inordinate ambitions our Lord gave an example of humility by washing the feet of his disciples. John 13:1–20. The traitor, Judas Iscariot, then left the apostolic company, John 13:21–35, and parallels, and the Lord's Supper was instituted. I Cor. 11:23–25; Matt. 26:26–29, and parallels. Then the denial of Peter was foretold; before the cock should crow twice Peter would deny his Lord three times.