the Egyptians were the first to discover the solar year, and to portion out its course into twelve parts both the space of time and the seasons which they delimit. It was observation of the course of the stars which led them to adopt this divisionIt is also the Egyptians who first bought into use the names of the twelve gods, which the Greeks adopted from them
HerodotusIt is sound planning that invariably earns us the outcome we want; without it, even the gods are unlikely to look with favour on our designs.
Herodotus