If you want to read more about the year and the day Jesus was born and about some of the historical events of that time, you may want to read Daniel B. Wallace’s article, The Birth of Jesus Christ on Bible.org. If you are not familiar with this site, it is one that could be quite useful. The folks at this site developed the NET Bible which I have used since it first came out. The NET Bible is a great study Bible. See for yourself. You can download it free here, can search online and download to your kindle and other bible software programs for a minimal price. Here is what they say about this Bible.
The NET Bible project was commissioned to create a faithful Bible translation that could be placed on the Internet, downloaded for free, and used around the world for ministry.
Many people suggest that our Christmas celebration on Dec 25 originated out of pagan festivals. An article in Biblical Archeology Review suggests otherwise. It may have arisen out of the belief that both the conception and death of Christ occurred on the same day.