What about the Christian faith side of the festive season?

If we look to the Gospel according to Luke, in The New International Version of the Good News Bible, we find that the reader finds out that before Mary married Joseph, Gabriel made the Annunciation to Mary, that she was chosen by God to be the mother of his son, the Light of the World, some biblical researchers believe that the annunciation happened on March 25th. That the Lord of the World, Jesus was conceived by the Holy Spirit. Here's the passage.

Luke 1:26-38 New International Version (NIV)

The Birth of Jesus Foretold

26 In the sixth month of Elizabeth’s pregnancy, God sent the angel Gabriel to Nazareth, a town in Galilee, 27 to a virgin pledged to be married to a man named Joseph, a descendant of David. The virgin’s name was Mary. 28 The angel went to her and said, “Greetings, you who are highly favored! The Lord is with you.”

29 Mary was greatly troubled at his words and wondered what kind of greeting this might be. 30 But the angel said to her, “Do not be afraid, Mary; you have found favor with God. 31 You will conceive and give birth to a son, and you are to call him Jesus. 32 He will be great and will be called the Son of the Most High. The Lord God will give him the throne of his father David, 33 and he will reign over Jacob’s descendants forever; his kingdom will never end.”

34 “How will this be,” Mary asked the angel, “since I am a virgin?”

35 The angel answered, “The Holy Spirit will come on you, and the power of the Most High will overshadow you. So the holy one to be born will be called[a] the Son of God. 36 Even Elizabeth your relative is going to have a child in her old age, and she who was said to be unable to conceive is in her sixth month. 37 For no word from God will ever fail.”

38 “I am the Lord’s servant,” Mary answered. “May your word to me be fulfilled.” Then the angel left her

Then, in the Gospel according to Matthew, the story of the birth of Jesus as follows, which became known as the Nativity story...

Matthew 1:18-2:23 English Standard Version (ESV)

The Birth of Jesus Christ

18 Now the birth of Jesus Christ[a] took place in this way. When his mother Mary had been betrothed[b] to Joseph, before they came together she was found to be with child from the Holy Spirit. 19 And her husband Joseph, being a just man and unwilling to put her to shame, resolved to divorce her quietly. 20 But as he considered these things, behold, an angel of the Lord appeared to him in a dream, saying, “Joseph, son of David, do not fear to take Mary as your wife, for that which is conceived in her is from the Holy Spirit. 21 She will bear a son, and you shall call his name Jesus, for he will save his people from their sins.” 22 All this took place to fulfill what the Lord had spoken by the prophet:

23 “Behold, the virgin shall conceive and bear a son,
    and they shall call his name Immanuel”

(which means, God with us). 24 When Joseph woke from sleep, he did as the angel of the Lord commanded him: he took his wife, 25 but knew her not until she had given birth to a son. And he called his name Jesus.

The Visit of the Wise Men

2 Now after Jesus was born in Bethlehem of Judea in the days of Herod the king, behold, wise men[c] from the east came to Jerusalem, 2 saying, “Where is he who has been born king of the Jews? For we saw his star when it rose[d] and have come to worship him.” 3 When Herod the king heard this, he was troubled, and all Jerusalem with him; 4 and assembling all the chief priests and scribes of the people, he inquired of them where the Christ was to be born. 5 They told him, “In Bethlehem of Judea, for so it is written by the prophet:

6 “‘And you, O Bethlehem, in the land of Judah,
    are by no means least among the rulers of Judah;
for from you shall come a ruler
    who will shepherd my people Israel.’”

7 Then Herod summoned the wise men secretly and ascertained from them what time the star had appeared. 8 And he sent them to Bethlehem, saying, “Go and search diligently for the child, and when you have found him, bring me word, that I too may come and worship him.” 9 After listening to the king, they went on their way. And behold, the star that they had seen when it rose went before them until it came to rest over the place where the child was. 10 When they saw the star, they rejoiced exceedingly with great joy. 11 And going into the house, they saw the child with Mary his mother, and they fell down and worshiped him. Then, opening their treasures, they offered him gifts, gold and frankincense and myrrh. 12 And being warned in a dream not to return to Herod, they departed to their own country by another way.

The Flight to Egypt

13 Now when they had departed, behold, an angel of the Lord appeared to Joseph in a dream and said, “Rise, take the child and his mother, and flee to Egypt, and remain there until I tell you, for Herod is about to search for the child, to destroy him.” 14 And he rose and took the child and his mother by night and departed to Egypt 15 and remained there until the death of Herod. This was to fulfill what the Lord had spoken by the prophet, “Out of Egypt I called my son.”

Herod Kills the Children

16 Then Herod, when he saw that he had been tricked by the wise men, became furious, and he sent and killed all the male children in Bethlehem and in all that region who were two years old or under, according to the time that he had ascertained from the wise men. 17 Then was fulfilled what was spoken by the prophet Jeremiah:

18 “A voice was heard in Ramah,
    weeping and loud lamentation,
Rachel weeping for her children;
    she refused to be comforted, because they are no more.”

The Return to Nazareth

19 But when Herod died, behold, an angel of the Lord appeared in a dream to Joseph in Egypt, 20 saying, “Rise, take the child and his mother and go to the land of Israel, for those who sought the child's life are dead.” 21 And he rose and took the child and his mother and went to the land of Israel. 22 But when he heard that Archelaus was reigning over Judea in place of his father Herod, he was afraid to go there, and being warned in a dream he withdrew to the district of Galilee. 23 And he went and lived in a city called Nazareth, so that what was spoken by the prophets might be fulfilled, that he would be called a Nazarene.

This became known as the story of the first Christmas.

The modern children's Nativity Play tells the story of the birth of Jesus and it is very popular.

Next chapter is the children's Nativity Play.