... two chief festivals, May Eve and November Eve, indicate the use of a calendar which is generally acknowledged to be pre-agricultural and earlier than the solstitial division of the year. The fertility rites of the cult bear out this indication, as they were for promoting the increase of animals and only rarely for the benefit of the crops. The cross-quarter-days, February 2 and August 1, which were also kept as festivals, were probably of later date, as, ... — The Witch-cult in Western Europe - A Study in Anthropology • Margaret Alice Murray
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