• by Teresa Buyikian , May 29, 2026

Blue Moon beer has one peculiar thing in common with its namesake: Neither the beer, nor the moon it is named after, are actually blue.

But this weekend, when  the second blue moon in May turns up, the Belgian ale is “stepping in to make things right” by turning its beer the color blue in bars across the county.

Beginning today through May 31, participating bars will serve Blue Moon Belgian White Belgian-Style Wheat Ale dyed “a vibrant blue hue,” while supplies last.

“We can't do much about the color of the moon in the sky, but we can do something about the one in your glass. So for one weekend, we're making Blue Moon, well … actually blue,” said Elizabeth Hitch, vice president of marketing, above-premium beer at Molson Coors Beverage Company, in a release. “Consider it us making good on a promise the night sky can never quite keep. We wanted to take a ‘once in a blue moon’ moment and turn it into something people can actually experience together over a great beer.”

Blue Moon actually got its name from a fan—originally created at the Sandlot Brewery in Denver, CO, in 1995, the beer was named “Bellyslide Wit” until a drinker commented, “A beer this good only comes around once in a blue moon.” Technically a “blue moon” is actually the second full moon in a single calendar month, or the third full moon in an astronomical season that has four, thus referring to a rare occurrence, and not the color itself.

Print and OOH ads playfully promote the blue weekend nationwide, featuring a bright blue pint of Blue Moon with the copy, “Although the blue moon won’t actually be blue, on the weekend of May 31, our beer will be.”

Bars in 30 U.S. markets will serve the blue beer, including Atlanta, Austin, Boston, Minneapolis, Nashville, New Orleans, New York City, Philadelphia, Sacramento, San Antonio, San Francisco and Tampa.