Believe what you wish, but there's no denying that this time of year has always been linked to many traditions, ceremonies, and celebrations which were connected to the sun's rebirth. Decorated evergreen trees and the 12 festival days of Yule are just a couple examples of those old celebrations.
This art shows why we have seasons. The globe to the right is where we are now.
Christians did not always celebrate the birth of Jesus as the original focus had been on his resurrection. It's interesting how the birth of the "Son of God" is celebrated at the time of year that many ancient (and not so ancient), cultures celebrated the return or rebirth of the "Sun" which they worshiped as God.
Talk about alignment. It was rained out here on the west coast (bummed I couldn't see it), but a rare lunar eclipse that coincided with this year's solstice happened early this morning. It's been centuries since and will not happen again until 2094. Most people alive today won't see it. Makes you stop and think... and wonder what the world will be like then?
I have to admit, I like the ancients, have always been a bit relieved and happy when the days get longer each day.