The Wiccan Wheel of the Year/Sabbats are totally alien to Hellenic Religion. They are a modern combination of two festival cycles from Northern Europe.
Really? Hmm. I never really looked all that deep into it as Wicca, while on the surface appealed to me, didn't resonate with me or at least the material I was reading at the time didn't. If you don't mind, which two cycles were merged?