Despite the name, the “Blue Moon” won’t be blue. In fact, it will look the same as any other full moon. According to the current definition, the term refers to the second full moon in a given calendar month. The traditional definition of a Blue Moon was reserved for the third full moon in a season that has four full moons, which happens in years that have 13 full moons instead of the usual 12. http://marygreeley.com/?p=67622