May 1 has been celebrated in various places around the world for thousands of years. While it is not a major holiday in the United States, many a school has appointed a May Queen and has had a traditional May Pole. Old yearbooks and school records often include pictures of the festivities. This celebration gradually petered out after WWII.
May 1 has always had elements of fertility ritual and the rebirth of spring as a central theme. Like many holidays May Day has pagan connections. Perhaps the most well known ritual comes from the Druids and is the festival of Beltane. A new village fire was set, the animals were purified and couples did what couples do in a most celebratory way.
Other sources accredit May Day to ancient rituals in India and Egypt. It stands to reason that all early civilizations celebrated the rites of Spring, crops, and fertility in general.
Enjoy the video. It is different. A special blessing wish for our friend Firedancer on her special day.
More on May Day on Quoth the Raven.