Personally I sincerely believe it was the Birthday of Jesus.
I love this documentary and obviously it supports my position with strong astronomy and a frankly very cool theory.
I disagree strongly with the assertion that because the Bible says "the animals were outside" that somehow that is proof it wasn't Winter. Israel's climate is similar to California and Australia, it is hotter than most other countries and is close to the equator. This means it has warm winters and animals could have indeed been out at night. I think this assertion is frankly dumb and easily believed only by people who live where it snows during winter.
Moreover I believe Jesus was born either during or immediately after Hannukah, the feast of the dedication. Not only it is poetic, the Maccabees revolt is the previous highly significant event in Jewish history and Judah Maccabee is arguably a forerunner to Christ. But the holiday represents a reborn Israel and a Temple at it's height of splendor, God's gift to a reborn physically saved Israel. To me it makes spiritual sense for the Messiah to have been born at the end of it, God's gift to the entire world.
I also believe in Sextus Julius Africanus's Historical dating of the conception of Christ(March 25th) and his subsequent assumable birthday (exactly 9 months later).
I can understand people's complaints such as the whole "was a pagan festival" arguement, but there were so many "Pagan Festivals" in the Roman Religion that no matter what date they agreed on it would have been close to one. Also why focus on "Pagan Festival" when the fact is almost everything in Christianity has a Jewish origin and so the more obvious connection to Hannukah should be accounted for instead.
Remember that Christmas is in fact a multiday(12) holiday officially when we are meant to give small gifts on every day... LIKE HANNUKAH ALSO IS.
I sincerely believe Jesus was born on December 25th and that it was less than a week after Hannukah, or in the last days of Hannukah.
Location: Melbourne, Australia
Ideology: Australian Liberalism