Keep in mind the unleavened bread feast was 15 Nisan which would have been a high sabbath, 14 nissan was the passaover a High Sabbath and the 13th would have been the day the lamb was killed. 33 A.D. Jewish calender shows this perfectly. Wednesday the 13 Nisan 33 A.D. started on what is our Tuesday evening at 6:00 ended Wednesday at 6:00 P.M.. This would have been the prepartion day for both feast. Notice "John 19: 14 And it was the preparation of the passover, and about the sixth hour: and he saith unto the Jews, Behold your King!" Pilate speaking to the Jews. So Wednesday evening would have begun the Passover. The evening of His crucifixion they went to the upper room where they planned to have passover the next evening, never does it say they ate the passover meal. Here is John 13:1 "Now before the feast of the passover, when Jesus knew that his hour was come that he should depart out of this world unto the Father, having loved his own which were in the world, he loved them unto the end." verse 2 "And supper being ended, the devil having now put into the heart of Judas Iscariot, Simon's son, to betray him;" John goes from saying before the feast of passover to saying they were eating supper, not the feast. Matthew 26: 26 "And as they were eating, Jesus took bread, and blessed it, and brake it, and gave it to the disciples, and said, Take, eat; this is my body." As they were eating, again no mention of eating the passover. Mark 14:12 "And the first day of unleavened bread, when they killed the passover, his disciples said unto him, Where wilt thou that we go and prepare that thou mayest eat the passover?" Matthew states the beginning of unleavened bread, the feast itself was on the 15th so the preparation for the two began on the 13th. Mark 14: 18 "And as they sat and did eat, Jesus said, Verily I say unto you, One of you which eateth with me shall betray me." 22 "And as they did eat, Jesus took bread, and blessed, and brake it, and gave to them, and said, Take, eat: this is my body." Again no mention of eating the passover meal, they just ate supper. Luke 22: 15 And he said unto them, With desire I have desired to eat this passover with you before I suffer: 16 For I say unto you, I will not any more eat thereof, until it be fulfilled in the kingdom of God. He desires to eat it but did he, seems by all the other passages He didn't get to eat it. His human desire wanted to but as the other passages show he didn't. He tells them He will not be able to eat it. 19 And he took bread, and gave thanks, and brake it, and gave unto them, saying, This is my body which is given for you: this do in remembrance of me. Notice He took bread but the passover feast was a Lamb. 20 Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you. So all this was taking place on the 13th our Tuesday night their Wednesday. Then Pilate examines the Lamb and finds it worthy on Wednesday the day of preparation. He found no fault. Never do we see that they ATE the Passover Feast nor that Christ ate it with them in the upper room.