The Question of Quirinuis part 2

Fact #4. In AD 6, Palestine was no longer under the rule of one king, but split up into several tetrarchies. Therefore, it would have been almost impossible for Joseph and Mary to be required to travel from Nazareth to Bethlehem as Luke reports unless it was prior to the death of Herod the Great. In order to travel from Nazareth to Bethlehem in AD 6, Joseph and Mary would hve fled to leave Galilee, governed by Herod Antipas and travel to Judea, now under direct control of the Roman government, which had just deposed Archelaus. But, as Wayne Brindle points out, the trip from Nazareth to Bethlehem "would have taken care place only if there were one central authority over Palestine - such as only during the reign of Herod the Great." 

Facts #5. Luke 2:4 indicates that the census was in accordance with an empire-wide policy of registering all the people. This does not specify that all provinces were enrolled at the same time, only that Augustus was, as Hoehner states, "the first one in history to order, a census or tax assessment of the whole provincial empire. This is further substantiated by the fact that Luke uses the present tense indicating that Augustus ordered censuses to be taken regularly rather than only only one time. (HoH.C 15)

The renowned archaeologist, Sir William Ramsay, affirmed: "The first enrollment in Syria was made in the year 8-7 B.C., but a consideration of the situation in Syria and Palestine about that time will show that the enrollment in Herod's kingdom was probably delayed for some time  later. 

This would put the census of Luke 2:2 in about 6 or 5 BC, just before Herod's death.