Worship of the sun instead of a Judeo-Christian God. Pretty much an excuse for atheists to not get their asses persecuted by bible thumping maniacs.
Atheism + Helios = Athelism
"Im an official member of the Universalistic Sun Worship faith!"
"You mean athelism? Thats not faith; you dont put your life in the hands of the stories told by a bunch of goat herders and fishermen with 6th grade educations. Thats being reasonable and scientific."
"Whatever. it rocks."