May Day (May 1) marks the return of Spring in the Northern Hemisphere, with origins in ancient agricultural rituals to ensure fertility, handed down from the Egyptians, Greeks, and Romans. Later permutations included the Celtic festival of Beltane and Germanic festival of Walpurgis Night. May Day falls exactly half a year from All Saints Day (November 1), and cross-quarter day with pagan overtones. Today, this ancient festival survives, including gathering wildflowers and decorating a May tree or Maypole, around which people dance, and some use it for political protest in association with International Workers Day.
An anthropological and archaeological study of the origins of the Christmas Tree customs that grew out of the older European pagan Winter Solstice rituals by the Old European Culture Blog.