A Blue Moon is the second full Moon in a month with two full Moons. A Blue Moon will occur on average every two or three years. In December, we tend to call the first full Moon the "Full Cold Moon" and the second Moon the "Full Long Nights Moon," also a name used by Native American tribes. These names, and some variations, were used by the Algonquin tribes from New England to Lake Superior.
A Blue Moon is the second full Moon in a month with two full Moons. A Blue Moon will occur on average every two or three years. In December, we tend to call the first full Moon the "Full Cold Moon" and the second Moon the "Full Long Nights Moon," also a name used by Native American tribes. These names, and some variations, were used by the Algonquin tribes from New England to Lake Superior.