See: John chapter 13.
Jesus celebrated the Passover on the 14th [evening] It was still the 14th day at John 19v14 or about six hours from sunrise [noon]. The Passover festival would have included the Festival of Unfermented cakes for a total of 8 days.
Passover on the 14th and starting on the 15th the 7-day festival.
Do we really have to go over this again? The Gospel of John is clear that Jesus was crucified on the day of Preparation, the day before the Passover. This is a day before the synoptic Gospels state.
More so, the Gospel of John is making a very clear point; Jesus is the lamb of God which must be slain for the sins of the world. Jesus is the sacrificial lamb, and thus, was crucified on the day of preparation, the day in which the lamb was sacrificed, the day before Passover.
John is very clear about this. He even states that Jesus was crucified on the day of preparation point blank. I don't see why this point has to be argued anymore since it is so clear.
The releasing of Barabbas took place on Nisan 14 the Passover.- John 18v39
Just an interesting note. This never actually happened. There was no such tradition, and there is no way Rome would have released Barabbas. It is a piece of fiction created for a certain reason, to paint the Jews even worse.
Wasn't the deliverance from Egypt on the 14th?
By the time of Christ instead of eating the Passover in each home as in Egypt,
for the Passover they gathered at Jerusalem. John [13vs 23,25] shows that with John being described at the disciple Jesus loved being present that evening of the start of Nisan 14. - John 19v26.
The Passover meal is never mentioned in John. There is no sign of the disciples and Jesus eating the Passover meal in John, as Passover had not yet occurred. More so, John is not described as being the disciple Jesus loved. If it did, then there would be no debate about it. However, John does not state who that disciple is. It is simply assumed that it was John the Apostle (actually distinctly different from John the disciple of the Lord).
So, from chapter 13 by chapter 19 of John it would have been the daytime, or daylight hours, that Jesus died and not that Jesus was going to eat the passover that evening because it was already eaten making the preparation for the rest of the passover which included the Sabbath along with the festival.
I think you're making things up. The passover meal was not eaten in the Gospel of John. It is so in each of the other Gospels, but not John.