Hey! It's a blue moon tonight! I went out and checked, and sure enough, it was bright blue.

Just kidding. I know as well as you do that it's not about the colour, it just means it is the second full moon in a month.

Though I'm told there have been occasions when the moon did turn blue.

Once in a blue moon, I suppose. Blue moons don't happen all that often, whether the colour changes or whether you get two full moons in a month.

So what sort of things do you do once in a blue moon?

Well, the last blue moon was in November 2001, just after I moved to the UK. And now we have one tonight, a week before I move to the Netherlands.

Hmmm.

The next one's in June 2007.

Let me know where I'm going, will you?