But, have you thought about why? The ancient pagans were not evil people, at least not especially evil for the times they lived in. They weren't devil worshippers for heaven's sake. They worshiped what they saw and witnessed. The sun, the moon, the trees, the wonders of nature.
For ever since the world was created, people have seen the earth and sky. Through everything God made, they can clearly see his invisible qualities—his eternal power and divine nature. So they have no excuse for not knowing God.~Romans 1:20 NLT
The winter solstice marks the end of the dark half of the year and the beginning of the light half, and before Christianity, people observed this, creating great festivals. The Romans in particular observed this time of year by decorating their houses with greenery, lighting candles, and giving presents. The ancient people, being dependent on the land, saw the lengthening days as something to celebrate.
The people who walk in darkness will see a great light.For those who live in a land of deep darkness, a light will shine.~Isaiah 9:2 NLT
Jesus spoke to the people once more and said, “I am the light of the world. If you follow me, you won’t have to walk in darkness, because you will have the light that leads to life.” ~John 8:12 NLT
It's true that Christianity came and turned pagan celebrations into Christian ones in an attempt to get the people to focus on the church's teachings. But when you look at what the people already sensed, and what the scriptures say, it makes sense to celebrate Christmas during this season. What do you think?