There isn't even any contemporary historical evidence Jesus existed, and no one knows when he would have been born if he did. Some theologians believe it would have been the end of September, since the Gospels state he was born six months after John the Baptist, and certain Jewish feast days near that birth were noted.
December 25 was chosen to coincide with pagan solstice celebrations- the Zoroastrian savior figure Mithra's birthday was celebrated December 25, and his story was remarkably similar to the Jesus tale (but older) so they assumed it would make for an easier transition for pagan converts.
There is absolutely no documentation in existence that pinpoints the birth of Jesus exactly. Some tend to think that it occurred in the Spring sometimes, due to weather conditions at the time, and the fact that the shepherds were in the fields, etc... However there is some also some textual indications that it could have been in December as well...
The specific date is uncertain but December 25th was chosen to celebrate it almost 2000 years ago. Calendars in those barely existed and the ines that did exist were very different from ours today. In the fourth century the first Christian Roman Emperor, Constantine, chose December 25. By then there was a new, much better and more reliable calendar system in use.
Jehovah's Witnesses say it's around the end of September or early October, Mormons believe they were given revelation from God that it is April 6th. But it is unknown for certain which of those is true. It IS known, however, that it was not December 25th.
The truth is we simply don't know the exact date of our Savior's birth. In fact, we don't even know for sure the year in which He was born. Scholars believe it was somewhere between 6 B.C. and 4 B.C. One thing is clear: if God felt it was important for us to know the exact date of the Savior's birth, He certainly would have told us in His Word. The fact is that He was born, that He came into the world to atone for our sins, that He was resurrected to eternal life, and that He's alive today. This is what we should celebrate, ...Surely here is the cause for celebration every day, not just once a year. Read more: http://www.gotquestions.org/December-25.html#ixzz2QG9Py2EZ
Well, if you look at Roman history and ponpoint the date that Herod had all 2-yr olds killed then go back approximately 2yrs, youd be closer than Dec 25. Dec 25 was chosen because it was a Roman holiday, and the Christians of that day wanted to celebrate Jesus, so they would celebrate about that time to avoid persecution! Since shepherds had not yet gone into caves for winter time, ( still in the fields) id think more like early Fall/autumn!
Time of Birth, Length of Ministry. Jesus evidently was born in the month of Ethanim (September-October) of the year 2 B.C.E., was baptized about the same time of the year in 29 C.E., and died about 3:00 p.m. on Friday, the 14th day of the spring month of Nisan (March-April), 33 C.E. The basis for these dates is as follows: Jesus was born approximately six months after the birth of his relative John (the Baptizer), during the rule of Roman Emperor Caesar Augustus (31 B.C.E. 14 C.E.) and the Syrian governorship of Quirinius (see REGISTRATION for the probable dates of Quirinius administration), and toward the close of the reign of Herod the Great over Judea.Mt 2:1, 13, 20-22; Lu 1:24-31, 36; 2:1, 2, 7.
God’s Word tells us precisely when Jesus died, but it gives little direct indication as to when he was born. This brings to mind King Solomon’s words: “A name is better than good oil, and the day of death than the day of one’s being born.” (Ecclesiastes 7:1) It is not surprising, then, that the Bible provides many details about Jesus’ ministry and death but few details about the time of his birth.