no, the moon wasn't really blue!
taken with a 1600 mm zoom, handheld! (16x optical, 2x digital) with special setting of the camera!
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Most definitions say that a blue moon is the second full moon in a calendar month. This year, July?s first full moon was on the 2nd. Because there are 29.5 days between full moons (known as the lunar month), here we are again at full moon on 31st.
However, this definition is the result of a simplification made by amateur astronomer James Hugh Pruett writing in the 3 March 1946 issue of Sky & Telescope magazine. He wrote about blue moons, explaining that they occur seven times every 19 years because the lunar month is shorter than most of our familiar calendrical months. So sometimes there are 13 full moons in a year instead of 12. On these occasions, he concluded, ?This gives 11 months with one full moon each and one with two. This second in a month, so I interpret it, was called Blue Moon.?

Simple but wrong. The term ?blue moon? was introduced by the Maine Farmers? Almanac, sometime after 1800. In their definition, the name was given to the third full moon in a season containing four. So, it could just as well be the first full moon in a month as the second.