OK, i guess that makes sense. Various smaller somewhat quirky topics do tend to crop up when people learn history because there are so incredibly many of them and history is nowhere near as structured as many other fields of science and humanities. It just tends to be other types of topics that crop up over here, especially since history study here tends to focus on the 20th century.
Anyway sorry for the off-topicness. On-topic in regards to when Jesus was born there is really a lot more to it than just when he was born. Scholars are also seriously casting doubt on where he was born and on just who his parents were. The modern, scholarly concensus seems to be that he was either born in Nazaret or grew up in Betlehem and that his parents weren't poor, low-status jews. I am not entirely sure why the last is the case, but the first is that there wouldn't have been much reason for his parents to actually travel while his mother was pregnant. The whole story of the great census does not make much sense, not only did it not require people to travel it took place a long time before the year Jesus was supposedly born.