The Holy Bible is silent about the actual date Jesus was born, in that the Bible says;

Today ( __/__/__? ) in the town of Bethlehem the town of David, a Savior has been born to you;

He is Christ the Lord. (Luke 2:4-11).

Why is the Bible silent about the date of Jesus' birth? It may be because Jesus Christ was in existence since the beginning

of creation (John 1:2), in that Jesus Christ is ... the firstborn over all creation.(Colossians 1:15).

The book of Proverbs confirms this further, it says,

"The Lord brought me forth as the first of His works,...from the beginning,

before the world began...before He made the earth...I was there

when He set the heavens in place,..." (Proverbs 8:22-27).

Furthermore, the Holy Bible says, He (Jesus Christ) was with God in the beginning (John 1:2).

God said, "Let us (God & Jesus Christ) make man in our image, in our likeness,...(Genesis 1:26).

The Bible also says, Jesus existed before John. (John 1:15) and Jesus also existed before Abraham,

Jesus said, "I tell you the truth, "Before Abraham was born, I am!" (John 8:58).