Luke 2:6 (KJB)
And so it was, that, while they were there, the days were accomplished that she should be delivered.
While they were in Bethlehem, Mary had now given birth to her firstborn son, Jesus. It must have been a harrowing time for them to try and find a room where Mary could have the baby or even to find someone to assist in delivering the baby. The trip from Nazareth to Bethlehem, which would have been a minimum of four days travel, may have assisted in bringing on the birth. The roads were dusty and strewn with rocks and other hazards which they no doubt had faced. But now she has accomplished the nine months and the Lord Jesus Christ was now born to her.
Luke 2:7 (KJB)
And she brought forth her firstborn son, and wrapped him in swaddling clothes, and laid him in a manger; because there was no room for them in the inn.
Since this was the time of the taxation, the rooms in the inns were all filled and there was no place for them to stay except in a stable. No one but Joseph and Mary were present to witness this great event. Joseph had to be a midwife to his own wife. Once she had given birth she had wrapped Him in swaddling clothes and laid Him in a manger. A manger was a feeding trough for the animals. (John 6:35 KJV) And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst. Isn’t it amazing that the baby in the feeding trough would also be the one who feeds all those who became saved in Him? It is very important that the Scripture uses the word “firstborn” because it tells us that Mary had other children and rebuffs the idea of the Roman Catholic teaching that Mary was a perpetual virgin.
Luke 2:8 (KJB)
And there were in the same country shepherds abiding in the field, keeping watch over their flock by night.
Now the fact that there were shepherds still abiding in the field gives us an indication that this was not the end of December. This would have been late summer or early fall because it does get cold in December in Israel. Bethlehem was located in the hill country where there would have been some good grazing land. The shepherds stayed with the flocks both day and night to protect them from thieves and wild animals. They were basically nomads living in the open fields.
Luke 2:9 (KJB)
And, lo, the angel of the Lord came upon them, and the glory of the Lord shone round about them: and they were sore afraid.
Then all of a sudden the darkness was now interrupted by a glowing angel sent to them. It is not written who this angel was but maybe it was Gabriel since he was involved since the beginning. The glory of the Lord would have brightened that field up greatly. If they were drowsy or sleeping, they would have been startled. They were greatly afraid because they had not experienced anything like this before and nothing could have prepared them for this.
Luke 2:10 (KJB)
And the angel said unto them, Fear not: for, behold, I bring you good tidings of great joy, which shall be to all people.
Then the angel speaks to the shepherds and commands them not to fear. If they would have been in tremendous fear, they may not have been able to comprehend the message that the angel brought to them. This is why the angel wanted them as calm as they could possibly be. The angel then proceeds to tell them that they are being brought good tidings of great joy. It would not only be great news for the shepherds, but for all the people. Now it will not be great news for every single person in the world just for those who will become saved through Christ. It will not be good news for the Pharisees and scribes, for Herod, or other who will oppose the Lord Jesus Christ. (Rom 3:22 KJV) Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference: The all people in the Luke verse will be those who will believe, both then and now.