I want you to provide one scrap of evidence that PROVES when Jesus was born.
http://ocafs.oca.org/FeastSaintsLife.asp?FSID=103638 The present Feast, commemorating the Nativity in the flesh of our Lord Jesus Christ, was established by the Church. Its origin goes back to the time of the Apostles. In the Apostolic Constitutions (Section 3, 13) it says, "Brethren, observe the feastdays; and first of all the Birth of Christ, which you are to celebrate on the twenty-fifth day of the ninth month." In another place it also says, "Celebrate the day of the Nativity of Christ, on which unseen grace is given man by the birth of the Word of God from the Virgin Mary for the salvation of the world."
In the second century St Clement of Alexandria also indicates that the day of the Nativity of Christ is December 25. In the third century St Hippolytus of Rome mentions the Feast of the Nativity of Christ, and appoints the Gospel readings for this day from the opening chapters of St Matthew.
In 302, during the persecution of Christians by Maximian, 20,000 Christians of Nicomedia (December 28) were burned in church on the very Feast of the Nativity of Christ. In that same century, after the persecution when the Church had received freedom of religion and had become the official religion in the Roman Empire, we find the Feast of the Nativity of Christ observed throughout the entire Church. There is evidence of this in the works of St Ephraim the Syrian, St Basil the Great, St Gregory the Theologian, St Gregory of Nyssa, St Ambrose of Milan, St John Chrysostom and other Fathers of the Church of the fourth century.
St John Chrysostom, in a sermon which he gave in the year 385, points out that the Feast of the Nativity of Christ is ancient, and indeed very ancient. In this same century, at the Cave of Bethlehem, made famous by the Birth of Jesus Christ, the empress St Helen built a church, which her mighty son Constantine adorned after her death. In the Codex of the emperor Theodosius from 438, and of the emperor Justinian in 535, the universal celebration of the day of the Nativity of Christ was decreed by law. Thus, Nicephorus Callistus, a writer of the fourteenth century, says in his History that in the sixth century, the emperor Justinian established the celebration of the Nativity of Christ throughout all the world.
Patriarch Anatolius of Constantinople in the fifth century, Sophronius and Andrew of Jerusalem in the seventh, Sts John of Damascus, Cosmas of Maium and Patriarch Germanus of Constantinople in the eighth, the Nun Cassiane in the ninth, and others whose names are unknown, wrote many sacred hymns for the Feast of the Nativity of Christ, which are still sung by the Church on this radiant festival.