If you’ve had your eyes trained to the skies recently, you already know there’s something pretty spectacular happening at the start of 2018: The year kicks off with a month with a blue moon. If you’ve been wondering what a blue moon means for your sign, though, it’s… well, it’s kind of complicated. When we say that there’s a blue moon happening, typically we’re talking about a calendrical blue moon, wherein two full moons occur in one Gregorian calendar month; the second moon is the "blue" one. However, that’s not the only definition of the term “blue moon” with which we have to contend; what’s more, some of them are more astrologically significant than others.
According to astrologer Susan Miller, the moon “drives your deepest feelings, the fine-tuning of your character, your instinct and intuition, your emotions, and your reactions.” It has a lot to deal with your personal history, which in turn affects how easy it is for you to stay in tune with your feelings; accordingly, full moons in particular are excellent times to take stock of your personal relationships. You might also want to take the opportunity of a full moon to metaphorically take in your harvest — if you started any projects or took any specific actions prior to the arrival of the full moon, now is the time to reap their benefits (or, more generally, take a look at their consequences).
Here’s the thing, though: Blue moons as observed in the Gregorian calendar don’t typically hold a lot of significance for astrologers. That’s the kind of blue moon we’re experiencing this month — so, at most, we can expect to experience the effects of a full moon twice in January instead of once. There are other types of blue moons, however; for example, a seasonal blue moon refers to the third full moon in a season in which there are four full moons instead of the usual three, giving the year 13 full moons total. The astrology website Astro Awakenings notes that this kind of blue moon has more astrological significance than the calendrical blue moon, although we won’t see one of them again until May 18, 2019, according to EarthSky.
However, the type of blue moon with the most significance is something else entirely: A third kind called an astrological blue moon, in which two full moons occur in one solar month — that is, as Astro Awakenings puts it, a time when “during the sun’s passage through one zodiac sign, the moon is full twice instead of once.” According to Blue Moon Astrology, the effects during these blue moons are notable: “These back-to-back,same-sign ‘lunations’ increase the influence of a single zodiac archetype,” which means that the qualities for those signs are intensified during an astrological blue moon period. These blue moons occur about once every three years.
This time, though, we’re just dealing with a calendrical blue moon, so again, we’ll mostly just be dealing with the astrological effects of a full moon twice this month. Here’s what you can expect for January 2018’s blue moon, according to your sign: