I don't know how many people know this, but on September 1 or 2, close to that anyway, there was a blue moon. I didn't know it, but one time I looked out the window and it was red. After a while I found out that at a certain time in the night, the moon looked blue, I didn't see it, I only saw it when it was red. Anyway, supposedly the next time there is a blue moon will be in 2015. Anyway, that gives reason for there to be the cliche "Once in a blue moon."