This weekend I’ll be celebrating a very special Blue Moon. Not only is it a Seasonal Blue Moon, it is also an Astrological Blue Moon, making it a very rare double Blue Moon!
There are three types of Blue Moon: a Calendar Blue Moon, a Seasonal Blue Moon, and an Astrological Blue Moon.
A Calendar Blue Moon occurs when there are two Full Moons in the same calendar month. The second Full Moon is the Blue Moon. While this is now the commonly accepted interpretation, it is actually the newest way to calculate a Blue Moon and is the least celebrated in the esoteric realms.
A Seasonal Blue Moon occurs when there are four Full Moons in a season. A seasonal cycle is measured from Equinox to Solstice, or from Solstice to Equinox. Each season lasts roughly three months and normally has three Full Moons. These Full Moons often have names associated with seasonal attributes which vary from place to place and hemisphere to hemisphere. Occasionally a seasonal cycle will have four Full Moons. When this happens it is the third Full Moon which is the Blue Moon, not the fourth as you might expect. By naming the third Full Moon a Blue Moon (rather than the fourth), the names and attributes of the usual seasonal Moons aren’t disrupted by the appearance of an extra Full Moon.
An Astrological Blue Moon occurs when there are two Full Moons in the same Astrological sign in the same Astrological month. Astrological months are approximately four weeks in length. When an Astrological month has two Full Moons in the same star sign, it is the second moon which is the Blue Moon.
So what season and sign is the August Blue Moon in? Well that depends on where you live. In Melbourne (Australia), the seasonal Blue Moon will be the third Full Moon in the Winter season and the Astrological Blue Moon is in the sign of Aquarius.
Personally I’ll be celebrating the Aquarius Blue Moon as Astrological Blue Moons are my favourite!