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According to Wikipedia (and
According to Wikipedia (and others): May Day on May 1 is an ancient Northern Hemisphere spring festival and usually a public holiday; it is also a traditional spring holiday in many cultures. The references to Mayday as the first day of Summer elsewhere in the article appear to be edits by people who are under the same sorts of misunderstanding as you. I have never said that the astronomical calculations of the equinoxes and solstices are not scientific. Of course they are, even though they were originally made by pre-scientific observers. What is not scientific is defining such common terms as Spring, Summer, Autumn and Winter by them when they clearly relate to quite other things. Besides the weather, they are also defined with reference to a host of other natural occurrences which do not require any knowledge of Science (even botany and zoology). When the weather and these other occurrences do not match the astronomical data we say that the season is early or late or did not happen in that year. But that does not mean that we believe the astronomical events are early or late or did not happen. To conflate the two things and say that the astronomical events "denote" the seasons as commonly understood is what is called a category error and is to be avoided, as much in the interest of Science as common sense, But enough of this.