Heliolatry

n. Worship of the sun, whether real or metaphorical

Sun-worship was ancient in Peru, but it was the Incas who made it the great state religion, and their heliolatry was organized for political ends.
— Rushton M. Dorman, “The Origin of Primitive Superstitions”

I remember hearing stories in college about Ibiza, where big-breasted women laid out naked practicing heliolatry on the beaches, and E pills were as abundant as hard candy in an old folks’ home.
— Chris Baker

I am certain that if our preparations for greeting the returning sun were seen by other people, either civilised or savage, we would be thought disciples of heliolatry.
— Frederick Albert Cook, Through the first Antarctic night

Etymology: Helios was the Greek god of the sun (Apollo the god of light, not the sun, although his worship became so popular that it eventually adopted many of the stories that originated with Helios, including that of the sun being a chariot he drove)