Blue Flower Moon, Saturday May 21


Ever wonder about Blue Moon folklore?

Is a blue man crying from its crater core?

No, it’s all about math

A rare numbers path,

Count two of two or three of four.

The full moon coming up on Saturday May 21 will be a  special kind of Blue Moon.  Not the regular kind–second of two full moons in a month.  This will be a  Special Seasonal Blue Moon, considered ‘Blue’ because it falls in a Season featuring four full moons rather than the usual three.  The third full moon of four Seasonal moons is the Blue one. Why? I have no idea.  I think the special spring moon should be the fourth–the one on June 20 making an appearance at 11:05 UT, only hours before the Summer Solstice at 22:34 UT. (As my limerick points out, it’s all about the math.)

Is a Blue Moon Blue?  Unfortunately not. Just as the Pink Moon of April isn’t pink, a Blue Moon isn’t blue.


Every month I have been reporting traditional Native American full moon names. May full moon is known as  Flower Moon, Milk Moon, Mother’s Moon, and Corn Planting Moon. To celebrate the blue and flower aspects of May’s moon, I wrote this limerick:

Dream of a blue flower moon tonight,

Shines exquisite unworldly delight,

Azure indigo,

With turquoise halo,

Crocus and Bluebell  blooms excite.

Photo credits: Blue Moon and Pasque Flower courtesy of
For more Blue Moon facts see  Universe Today.The Old Farmer's Almanac is my source for full moon names.

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14 thoughts on “Blue Flower Moon, Saturday May 21

  1. Thanks for the info and the limericks. I think I did know about the “regular” blue moon, but not the special seasonal type. Unfortunately, we’re supposed to have rain tonight, so we won’t be seeing it here anyway.

    Liked by 1 person

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