I hope you’ll allow me a little speculation…
Here are the few days leading up to Jesus supposed resurrection as related by the synoptic gospels:
Nisan 15: Wednesday sunset to Thursday sunset. The Day of Preparation when thousands of Paschal lambs are slaughtered ready for the following day’s (i.e. Thursday evening’s) Passover. Jesus instructs his disciples on the arrangements he has made for the feast.
Nisan 16: a. Thursday evening: Jesus celebrates Passover.
b. Thursday evening and night: Jesus is arrested and tried.
c. Friday 9.00: Jesus is put to the cross
d. Friday 15.00: Jesus dies.
Nisan 17: a. Friday ‘evening’: The start of the Sabbath: Jesus is buried by Joseph of Arimathea.
b. Friday evening to Saturday sunset: Jesus body lies in the sealed tomb.
Nisan 18: Saturday sunset to ‘early’ Sunday: The body remains in the tomb overnight(?) but by early next morning is missing.
John’s timeline, however, is markedly different. He says that Jesus is arrested on the Day of Preparation for Passover – that’s Nisan 15 according to the synoptics, which started at sunset on Wednesday (John 13.1; 19.14.) In John, therefore, Jesus does not eat a Passover meal with his disciples. He shares an ordinary supper with them on the Wednesday evening, when he washes their feet. Judas slips out to inform on him just as he does in the synoptic gospels, a day later (Mark 14.16-17; Matthew 26.19-20; Luke 22.33-45.) John significantly alters the timing of events though he retains Judas leaving, though from a different meal. In the fourth gospel, Jesus is arrested on the Wednesday evening, the start of Nisan 15. John mentions in 18.28 that the temple officials involved in the arrest have yet to eat their Passover meal; it still awaits on Thursday evening.
In John, Jesus is tried during the night of Nisan 15, or the early hours of Thursday. Eventually, at around noon on the Thursday he is nailed to the cross and dies rapidly (John 19.14, 31, 42). By the time everyone else is eating the Passover meal later that day – a meal Jesus is present for in the synoptic gospels – John’s Jesus is well and truly dead. He is placed in Joseph of Arimathea’s tomb at some point Thursday evening, either the end of Nisan 15 or the start of Nisan 16. He remains there during Friday and Saturday (the Sabbath) but by Sunday morning his body, according to the story, is missing.
It has been argued – given we don’t know the year Jesus was crucified – that John has his Passover falling on the Saturday, the Sabbath (John 19.31), as happened on occasion, and that therefore John’s ‘Day of Passover Preparation’ was not the Thursday – as it is in the synoptics – but the Friday. According to this line of reasoning, Jesus’ arrest in John was also on Thursday evening, at the start of Nisan 16 and his crucifixion was on Friday, as in the synoptic gospels. But the Day of Passover Preparation cannot be freely moved around to accommodate both versions of events; either it was on the Thursday (Nisan 15) as the synoptics record, or it was on the Friday (Nisan 16) as those who seek to locate John’s crucifixion on Friday argue. Either John is wrong about when the Day of Passover Preparation fell or his Jesus was crucified a day earlier than in the synoptics on their Day of Preparation, Nisan 15.
There is further circumstantial evidence for John’s crucifixion being on the Thursday. While the synoptics have the chief priests, scribes and elders witnessing the crucifixion for themselves, John doesn’t mention their presence. In his Thursday scenario, they are too busy preparing for that evening’s Passover, overseeing the ritual slaughter of thousand of animals, to attend the crucifixion. Similarly, the various activities after Jesus dies – the buying of linen and spices, the removal of the body from the cross, the preparation for burial, sundry visits to Pilate and the posting of guards (though John does not report the latter.) – do not entail any infringement of the Sabbath regulations.
Moreover, John has Jesus in the tomb for three days and nights, more or less; the supposed resurrection does indeed occur ‘after three days’ as Jesus is made to predict numerous times (19 in total.)
Nisan 16: Jesus is buried at the start of Nisan 16 (our Thursday evening),
Nisan 17: Jesus remains in the tomb throughout Nisan 17; 6pm Friday to 6pm Saturday.
Nisan 18: 6pm Saturday to the early hours of our Sunday. He remains in the tomb until some indeterminate point, either before dawn (according to John) or just after (the synoptics.)
As well as a resurrection ‘on the third day’, John’s version of events provides an added bonus. By having his crucifixion on the Day of Passover Preparation, John is able to draw an analogy between the slaughter of the sacrificial lambs and his ‘Lamb of God’ who, in his death, replaces them as an atonement offering.
I don’t know; maybe I’ve got this all wrong. There’s a problem, I concede, with John 19.30 which implies Jesus is on the cross on Friday (though by John 19.42, when Jesus is buried, it looks like the narrative has reverted to the day before the Sabbath; Friday day time.)
The effort to harmonise the two different timelines, that of the synoptics and that of John, involves having two different Days of Passover Preparation (Thursday and Friday) and indeed, two Passovers (Friday and Saturday). Does this seem likely to you? Two lots of lambs to be slaughtered and two celebrations on two consecutive days – I mean, these people weren’t made of money! Isn’t it far more likely there was one Day of Preparation and one Passover? If so, who is right about when they fell? John or the synoptic writers? They both can’t be. Whether apologists like it or not, isn’t it more likely that the fourth gospel has Jesus crucified on the same Day of Preparation that the synoptics mention (the Thursday), while in the synoptics – all based, let’s remember, on Mark’s account – he dies on the Friday after the Passover meal as they relate? It makes more sense of the conflicting timelines than attempting to mash them both together when they won’t. One or other, John or the synoptics, got it wrong about the day Jesus died; perhaps both did.
One thing’s for sure, what follows is pure unadulterated myth.