No offense, but the historical reason Christmas is celebrated just days after winter solstice (December 21st) is because of pre-existing European traditions for its celebration before the spread of Christianity.
I’m certainly not a Wiccan of any kind, but my understanding has always been that Christmas trees, Easter eggs, etc, come from these pre-Christian traditions.
I remember when they started putting Christmas trees in our protestant church when I was younger. Many members of the church were upset about these “Wiccan” traditions being brought into the sanctuary.