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Elaphebolia

An ancient festival dedicated to honouring the Goddess Artemis.

Elaphebolion

The ninth month in the Athenian calendar. Roughly March - April. Home to the City Dionysia, origin point of Greek theatre. 

Eleusinian Mysteries

Marked as the Lesser Mysteries in spring and the Greater Mysteries in autumn, these were the most famous secret religious rites of ancient Greece, deeply connected to Demeter and Persephone.

Epithet

A descriptive title or byname attached to a god's name used to specify which particular aspect, domain, or local cult of that deity is being invoked. The same god can carry many different epithets depending on context. 

Epithets can be unique to one deity, or shared across several when they describe a function rather than a name.