![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhO9bWXh97TWET5bQt19gtEGMs9KRtyAN6qPIJFx9r6cJfqynaD74cAkeeCR_ZKC6uB1aNZox2Wr9j0MByW8sCCHpqR3UR3t9LGhbDvEjlq5dpSx6BrLpqFO9YUv5fhKr-stXZLsqdoBQ0/s200/bluemoontop.jpg)
The modern day definition of a Blue Moon is
when there are 2 full moons in one month. A full moon occurs roughly every 29.5
days and on the rare occasions when the full moon falls at the very beginning
of a month there is a good chance a Blue Moon will occur at the end of it. According to this definition we have a blue moon today.
For exact times of the Full and Blue Moons see the Full Moon
Calendar.