Luke 2:8 In the same region there were some shepherds staying out in the fields and keeping watch over their flock by night.
Luke 2:9 And an angel of the Lord suddenly stood before them, and the glory of the Lord shone around them; and they were terribly frightened.
Luke 2:10 But the angel said to them, "Do not be afraid; for behold, I bring you good news of great joy which will be for all the people;
Luke 2:11 for today in the city of David there has been born for you a Savior, who is Christ the Lord.
Luke 2:12 "This will be a sign for you: you will find a baby wrapped in cloths and lying in a manger."
One problem, the historical record of this period reveal that shepards were only in the fields tending their flock between March and November after that it was too cold. Therefore Jesus was not born on December 25 and was more than likely born in the summer.