What Is A Blue Moon?
"Once in a Blue Moon" - We've all heard that expression, right? But do you know what a Blue Moon is? Read On. . . . .
A Blue Moon is the second full moon in the same month. While this is a rare occurrence, it has already happened once recently (January 1999).
On March 31st 1999 we had another Blue Moon...the second full moon in the month of March.
Because...there won't be another one until November 30, 2001.
And, we won't have another double Blue Moon year until 2018!
Did you miss it? Well, take heart, there are more coming up. Here's a schedule for the next dozen.
The Upcoming Blue Moon's