March of 2018 may be remembered for its nor’easter tally. (Three and counting.) But this snowy, soggy month is also going to provide us with our last blue moon of the year.

And next year, too.

According to the most accepted definition of “blue moon” — two full moons that occur during the same month — our next one won’t be making an appearance until Oct. 31, 2020.

Yes, Halloween night!

(If you’re planning a party for that evening, you might want to think about a blue theme: blue costumes, blue tortilla chips, blue plastic eyeballs floating in the punch bowl...)

Full Worm Moon term

Our first full moon occurred on March 2. That one was also called the Full Worm Moon, because it occurs at the time that birds return in search of worms. (You can thank the Old Farmers Almanac for that squiggly-wiggly term.) It is also the last full moon of winter.

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The next full moon is due on March 31. And though it may appear blue, depending on the evening skies, the moon won’t be changing color.

Think pink!

Ditto for April's full moon, which will fill the night sky on April 30. This full moon is referred to as the Pink Moon by the Old Farmers Almanac, because it often coincides with the return of spring flowers.

Blue moons are rare, hence the maxim “once in a blue moon.” Definitions vary, though. To astronomers, a blue moon is the third full moon to occur during a season with four full moons. If you prefer that definition, the next blue moon will happen on May 18, 2019.

Either way, it’s going to be a while.

Full moons occur every 29 days or so and that's not changing. (Blame your calendar!) The remaining full moons of 2018 will occur on March 31, April 29, May 29, June 28. July 27, Aug. 26, Sept. 24, Oct. 24, Nov. 23 and Dec. 22.

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From the photographer:How I got a photo of the super blue blood moon

If you want to photograph the March 31 blue moon or any of the upcoming full moons, you should try to shoot from a dark spot (away from artificial lights) and turn off your flash. Pros also recommend using a tripod and “framing” the moon with a tree or some other object. This will help prevent the light from blurring.