Peacefulpete says:
John 19:14 says Jesus was still being tried by Pilate at noon. John also drops the whole 3 hours of darkness element.
Correct.
This is due to John altering his gospel to retrofit the life story of Jesus into the Jewish Paschal liturgy cycle. Like all the other Passover lambs, Jesus has to be offered before God by the priests according to this narrative model.
Unlike in the other Synoptic Gospels where Jesus died on Passover day, Nisan 15, in John's gospel Jesus is handed over from Annas to Caiaphas, both high priests, then to Pilate--afterwards we are told "it was the day of Preparation for the Passover, [Nisan 14] and it was about noon. [Pilate] said to the Jews, 'Here is your King!'"--John 18:24-19:14ff.
According to the Talmud and Josephus, on Nisan 14, the priests would hand over the first of thousands of lambs for the Passover Seder meals beginning at 12 noon and stop the slaughtering beginning at 3 pm so roasting could begin.
In John's narrative the high priests hand over Jesus at noon on Nisan 14 and he dies at 3 pm, "the Lamb of God who takes away the sin of the world!"--John 1:29; compare 19:31-37.
John does not record the hour Jesus died, but is obviously playing off of the historical Paschal details, as well as Passover and Christian traditions.
This appears to be so central a theme to John's work that he changed the day of Jesus's death and replaced the Lord’s Last Supper with the Washing of the Apostles Feet and telling Judas to do something that other disciples mistake for instructions to "buy what we need for the festival," a meaningless command if this had been Passover night as Passover is a Sabbath and the day after Passover is also a Sabbath, and no buying or carrying money is allowed on either date if this was the night of the Seder.--John 13:29.
This only appears in John because only in John is it early enough before Passover to still carry money to shop and buy things ahead of Preparation Day, Nisan 14, due to John shifting things around unlike the other gospel accounts.