Blue Moon

The sky was so clear driving home tonight... brrr... and the moon was so bright. I intended to blip the moon on it's own when I got home but noticed this charming sign on the way and changed my mind.

The moon looked almost full, it wasn't until I got home that I looked up it is at its fullest at 12:27pm tomorrow (lunch time) and that blue moon means 2 full moons in a month - nothing to do with the colour! Not only that, this happens once every 2 or 3 years, or as we like to say, Once in a Blue Moon.