Im a de facto atheist; the pedant in me insists that I not claim to know for certain that all religious claims are false, but I also dont begin to entertain the idea that my behavior should reflect this cavil. Nevertheless, I often don pagan trappings if only because I recognize that seasons are important to people, and I like to mark their passage. Agriculture has had its way with society for a long time, and only in the last century has the most technologically-sequestered fraction of humanity been freed from its seasonal cadence. So of course now we fetishize the seasons and give them more weight than our great-grandparents did.
I particularly enjoy the frenzy that slowly builds starting with the equinoxes and then abruptly stops upon reaching the solstices. If sowing and reaping have been humanitys eternal toil, the solsticeswinter in particularhave been our blessed moments of repose.