at EarthSky.org earthsky.org EarthSky some articles Blue Moon Full Blue Moon next blue moon will happen early next year earthsky.org earthsky.org ^ http://earthsky.org/space/when-is-the-next-blue-moon according to EarthSky.org What is a Blue Moon? http://earthsky.org/space/when-is-the-next-blue-moon#color according to modern folklore the next blue moon will occur on July 31 Next Blue Moon is May 21, 2016