notpashut, that’s what I’d guess, but I wasn’t sure if there was an issue with Volvo as well.
brooklyn19, I think you’re kidding, but in case you’re not, people definitely knew when the solstice was–they developed sophisticated devices that determined when solstice occurred based on the sun hitting a certain spot. So there must have been some reason for the Church to change the date to 12/25, and I think my theory fits.
BTW, the use of fir trees as a holiday symbol is based on the concept that evergreens don’t lose their leaves in the fall as deciduous trees do, so they represent the coming of spring.