We usually associate the term 'Blue Moon' with a month containing two full moons. Nothing of that sort happens this month, and yet May 18 brings a Blue Moon nonetheless -- at least according to rules drawn up by an almanac's editor nearly a century ago.
We usually associate the term 'Blue Moon' with a month containing two full moons. Nothing of that sort happens this month, and yet May 18 brings a Blue Moon nonetheless -- at least according to rules drawn up by an almanac's editor nearly a century ago.
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