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             These Blue Moons
              are not listed in the Maine Farmersą Almanac from 1915 to 1951 but
              are identified as such in the "Farmers' Calendar" commentaries
              of the 1937 to 1948 editions.
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             These Blue Moons
              are listed explicitly in the "Aspects, Holydays, Weather, Etc."
              section of the Maine Farmers' Almanac from 1937 to 1956. (All dates
              in both columns are Universal Time.)
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             1915 November
              21
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             1937 August
              22
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             1918 August
              22
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             1940 May 21
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             1921 May 21
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             1943 February
              20
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             1924 February
              20
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             1945 August
              23**
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             1926 summer
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             1948 May 23
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             1929 spring
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             1951 May 21*
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             1932 winter*
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             1953 November
              20
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             1934 November
              21
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             1956 August
              21
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             1951 winter*
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      *The "Farmers'
        Calendar" for May 1948 gave the seasons of several past and future
        Blue Moons, including winter of 1932 and winter of 1951, both of which
        are probably errors. When the 1951 almanac was actually printed, the Blue
        Moon was listed on May 21, 1951. Our calculations give Blue Moons on May
        20, 1932, and May 21, 1951. 
      **Our calculations
        based on the apparent Sun give August 23, 1945, while computations based
        on the mean Sun give November 19, 1945. The August 1945 Blue Moon appears
        to be another almanac error. 
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