Plutarch, in his essay on Isis and Osiris, mentions an Egyptian festival that he says marked the beginning of spring and which was called The Entry of Osiris into the Moon. Here’s what he says:

Further, on the first day of the month of Phamenoth they hold a festival, which they call Entry of Osiris into the Moon, for it is the beginning of spring. Thus they locate the power of Osiris in the moon and say that Isis, as the creative principle, has intercourse with him. For this reason they also call the moon the mother of the world and they believe her nature to be both male and female since she is filled and made pregnant by the sun while she herself in turn projects and disseminates procreative elements in the air. (Plutarch, On Isis and Osiris, 43)

In his discussion of this passage, J. Gwyn Griffiths (have I…

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