Jesus the hero of NT Gospel story must have died in 30-36 period.
Apologist say the Four Gospels were written by
Two Disciples -Matthew and John
Two Associates of Peter and Paul- Mark and Luke.
None of the Gospels has the authors name, and the first three does not claims to be an eye witness account.
Fourth gospel alone claims to be an eye witness, But as per the 2nd century traditions this gospel stoary was written during the reign of Roman King Trojan i.e who came to power only in 98 CE.,
Dr. C.J. Cadoux, who was Mackennal Professor of Church History at Oxford, thus sums up the conclusions of eeminent Biblical scholas regarding the nature and composition of this Gospel:
"The speeches in the Fourth Gospel (even apart from the early messianic claim) are so different from those in the Syoptics, and so like the comments of the Fourth Evangelist both cannot be equally reliable as records of what Jesus said : Literary veracity in ancient times did forbid, as it does now, the assingment of fictitious speeches to historical characters: the best ancient historians made a practice of and assigning such speeches in this way."---1. C.J. Cadoux: The Life of Jesus, p. 16.
John 21-Easy-to-Read Version (ERV)
20 Peter turned and saw the follower Jesus loved very much walking behind them. (This was the follower who had leaned against Jesus at the supper and said, “Lord, who is it that will hand you over?”)21 When Peter saw him behind them, he asked Jesus, “Lord, what about him?”
22 Jesus answered, “Maybe I want him to live until I come. That should not matter to you. You follow me!”
23 So a story spread among the followers of Jesus. They were saying that this follower would not die. But Jesus did not say he would not die. He only said, “Maybe I want him to live until I come. That should not matter to you.”
24 That follower is the one who is telling these things. He is the one who has now written them all down. We know that what he says is true.
C.J. Cadoux sums up the position in these words in his book Life of Jesus.
“In the four Gopels, therefore, the main documents to which we must go if we are to fill-out at all that bare sketch which we can Put together from other sources, we find material of widely-differing quality as regards credibility. So far-reaching is the element of ucertainly that it is temptig to ‘down tools’ at once, and to declare the task hopeless. The historical inconsistencies and impobabilities in parts of the Gospels form some of arguments advanced in favour of the Christ-myth theory. These are, however, entirely outweighed as we have shown-by ther considerations. Still, the discrepancies and uncertainties that remain are serious and consequently many moderns, who have no doubt whatever of Jesus’ real existence, regard as hopeless any attempt to dissolve out the historically- true from the legendary or mythical matter which the Gospels contain, and to recostruct the story of Jesus’ mission out of the more historical residue.”
-----------------------------1. C.J. Cadoux: The Life of Jesus., pp.16,17.
Prof. M.M.Bruce, who was the Professor for Nt History is Manchester University in his Book-“The Real Jesus”
“ The Conclusion usually(and I think rightly) drawn from their comparative study is that the Gospel of Mark (or something like it) served as a source for the Gospels of Matthew and Luke, and that these two also had access to a collection of sayings of Jesus(conveninently called ‘Q’), which may have been complied as a handbook for the Gentile mission around AD50.- P-25.
Mark was written aound 70-75, and all the other 3 gospel story were created from this.
