And, by popular acclaim, that means it’s a Blue Moon month – but Blue in name only. That’s because a Blue Moon is sometimes defined as the second full moon in a calendar month. The first full moon is August 1. The second full moon is August 31, 2012. The second full moon of August 2012 is the Blue Moon.
There are two more definitions for Blue Moon. It can be the third of four full moons in a single season. Or, someday, you might see an actual blue-colored moon.
“Seven times in 19 years there were — and still are — 13 full moons in a year. 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.”
