Dating of gospels
Further, Paul speaks of more than 500 eyewitnesses to the resurrection who were still alive when he wrote (15:6). It is one of the best attested books of any kind from the ancient world.
The destiny ('Theophilus'), style, and vocabulary of the two books betray a common author. The significance of Gallio's judgement in Acts -17 may be seen as setting precedent to legitimize Christian teaching under the umbrella of the tolerance extended to Judaism. The prominence and authority of the Sadducees in Acts reflects a pre-70 date, before the collapse of their political cooperation with Rome. The relatively sympathetic attitude in Acts to Pharisees (unlike that found even in Luke's Gospel) does not fit well with in the period of Pharisaic revival that led up to the council at Jamnia.
When the New Testament was written is a significant issue, as one assembles the overall argument for Christianity.
Confidence in the historical accuracy of these documents depends partly on whether they were written by eyewitnesses and contemporaries to the events described, as the Bible claims.
This is contemporary to the generation who witnessed the events of Jesus' life, death, and resurrection.
This is precisely what Luke claims in the prologue to his Gospel: Many have undertaken to draw up a record of the things that have been fulfilled among us, just as they were handed down to us by those who were eye-witnesses and servants of the word.