ext_1996 ([identity profile] sturgeonslawyer.livejournal.com) wrote in [personal profile] calimac 2011-11-25 07:54 pm (UTC)

Interestingly, according to Wikipedia (i know, what a fine authority...) "blue moon" refers to "the third full moon in a season with four full moons." This is apparently the definition used by the Farmer's Almanac. The "second in a month" interpretation apparently comes from an article in Sky & Telescope, in March of 1946.

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