The greater sabbats are: Samhain (Halloween or November Eve), the Celtic New Year; the days when the walls between the worlds were said to be thinnest and when contact with one’s ancestors took place; Oimelc (February 1), the winter purification festival…Beltane (May 1), the great fertility festival…. Different Craft traditions…treat the festivals in diverse ways. But almost all traditions at least celebrate Samhain and Beltane.