A few points:

Many Christians are non-church-goers because may churches have thrown God and Jesus completely out, and the other churches tend to be clannish and antisocial.

Biblical scholars have determined that Jesus was most likely born sometime in October, by looking at old Jewish temple service records. The early chruch moved Christmas to mid-winter to try to capitalize on the already existing solstice celebrations.

I believe that God created a world that is regular and well-enough behaved to permit solstices to happen (that is to say, He created the laws of mathematics ane physics). So if you are celebrating the solstice, you are indirectly praising the Creator as well.
MD