This line of argument is insupportable because the Gospels clearly relate that Christ was crucified on the 15th of the month. The day that is calls the “sabbath” has to refer to the 16th. Even if “sabbath” could signify the Feast of Unleavened Bread, the day following the Crucifixion could not be that day, because he was crucified that day.
Now the first day of the feast of unleavened bread the disciples came to Jesus, saying unto him, Where wilt thou that we prepare for thee to eat the passover?
Christ was crucified on Passover day, the fourteenth. He could not have been killed on any other day because Christ is our Passover, sacrificed for us (1 Cor. 5:7).
“Now the first day of the feast of unleavened bread the disciples came to Jesus, saying unto him, Where wilt thou that we prepare for thee to eat the Passover?” (Matt. 26:17).
The festival of unleavened bread, as Leviticus shows, is preceded by Passover (the 14th), then the seven days of unleavened bread. However, since leaven was put out of the houses starting on the 14th, the Passover came to be called one of the days of unleavened bread by NT times, but when this is the case 8 days are included in the term “feast of unleavened bread.”
So, what Matthew meant by “the first day of the feast…” was actually the fourteenth or Passover day, not the fifteenth. They ate the Passover meal on the evening of the fourteenth (Matt. 26:20). This was the start of the fourteenth day (their days start and end at even). During that same day, in the afternoon, Jesus was crucified (still the 14th).
Notice that the Gospels also record the Jews as saying, “Not on the feast day” (Mat 26:5; Mark 14:2). The feast day was the annual Sabbath of the 15th, the day after the Passover. Jesus was not killed that day of the feast, but the day before.