The Gospel according to Luke states that the miraculous birth occurred in a year when the Emperor Caesar… — Christopher Hitchens

The Gospel according to Luke states that the miraculous birth occurred in a year when the Emperor Caesar Augustus ordered a census for the purposes of taxation, and that this happened at a time when Herod reigned in Judaea and Quirinius was governor of Syria. That is the closest to a triangulation of historical dating that any writer even attempts. But Herod died four years "BC" and during his rulership the governor of Syria was not Quirinius. There is no mention of any Augustan census by any Roman historian, but the Jewish chronicler Josephus mentions one that did occur — without the onerous requirement for people to return to their places of birth, and six years after the birth of Jesus is supposed to have taken place.

p. 112Source: Wikiquote · CC BY-SA 4.0