Esbats
An Esbat is a celebration which takes place at the time of the full moon. It is specially devoted to the Goddess who is associated with the moon. The God, however is revered too as her equal. There are 13 Esbats in a year, not twelve as our "Flawed" Christian calendar would have us believe. In fact a natural month would have 28 days, therefore we would have 13 months in a year.