We know this is the year St Peter and St Paul were killed in Rome during the persecution of the Emperor Nero.
On the face of it, the problem is not so difficult, but what we have to do is take things at face value with common sense.
Once we get into academic theories about what might have happened it is all a bit like conspiracy theories–in which one scrap of ambiguous evidence may mean that and may mean this and may mean something else, then the theorists start building great castles in the from scraps of evidence combined with huge chunks of speculation.
For my purposes I will look at the most relevant information from before A. Unfortunately, the questions of New Testament authorship and dating are not cut and dried. There is substantial variation in the writings of the church fathers.
The church fathers did not have the current understanding of history and authorship. To determine New Testament authorship as best we can, we use the earliest of the patristic sources augmented by the internal evidence of the New Testament.
Scholars believe the Gospel of Luke was based on the Gospel of Mark and the Gospel of Matthew.
If the gospel of Luke depended on Mark and Matthew, then they were also written before 65 AD. Therefore the main three gospels were written within just thirty or so years of the death of Christ.
The authors must have clear links to the eyewitnesses (or be eyewitnesses) to reduce the possibility of communication mistakes.
We will learn that even in the most pessimistic, but rational, reading of the data, we come to the understanding that the authors of the New Testament are close enough to the events to be able to give an accurate picture of historical events.
Style and vocabulary vary greatly within any writer’s work.
Why do scholars try so hard then to give a late date to the New Testament? If Jesus really claimed to be God incarnate–as the gospels show–then it is difficult to avoid this conclusion about him.
If Peter and Paul had died by the time it had been completed we can be sure Luke would have mentioned their martyrdom.