Every so often we get a second Full Moon in a month and sometimes we actually get four Full Moons in a single season. Such Full Moons are called Blue Moons or sometimes ‘Goal Moons’. Sadly the Moon doesn’t actually change colour, it looks just the same as the usual Full Moon.
The term ‘Blue Moon’ seems to only be a few hundred years old. References in history to a Blue Moon were improbable events or things that would not normally happen. This evolved to mean a rare occurrence or happening, and has led to the saying ‘once in a blue moon’.
There is a belief that the Blue Moon holds the knowledge of the Crone and, therefore, all the wisdom of the Triple Goddesses combined. It is also said that the Blue Moon brings a time of heightened communication and connection with the Divine and the spirit world.
I would work magic on a Blue Moon for something that seems unobtainable or difficult to achieve … go with the thought that whatever your intent is, the outcome might just happen ‘once in a Blue Moon’.
Pagan Portals – Moon Magic