When we have two full moons in one month the second full moon is called a Blue moon.
Supposedly this term comes from the Farmers Almanac that began publication in 1818. Apparently in the Maine Farmers Almanac the editors listed the full moon dates for each month in Red. If there was a second full moon for that month it was in blue.
Since two full moons in one month are quite rare the term “Once in a blue moon” has come to refer to events that only happen rarely. For example once in a blue moon I actually do scratch off a winning lottery ticket.
No Comments