Close-up of moon with green hue.

Rare ‘Green Moon’ in April?

An old stoner joke about a rare opportunity to spot a “green moon” in the night sky is resurrected every April, sometimes with new twists.

We first investigated reports of that green moon could be seen for the first time in over a century in May 2016 and found it to be “fictional” for a number of reasons. First, there are plenty of credible websites that list all astronomical events and a green moon doesn’t appear on any of them. Space.com, Sea and Sky and Universe Today are just a few sites with listings, and the so-called green moon is nowhere to be found.

Second, the photo of the green moon used in the meme was taken from a Flickr account; in it, someone had digitally edited an August 2009 photograph, and posted a joking comment, “Who said the moon isn’t made of green cheese?”

Later versions of the “green moon” hoax claimed that that the rare astronomical event could be viewed on April 20, or 4/20. Using the same altered image of the green moon from the previous version, this one claims that this astronomical event takes place once every 420 years:

green moon four-twenty

The newer version appears to be a not-so-subtle reference to smoking marijuana, as the term “420” has been used as code for marijuana use for many years, thanks to a particularly stonery misconception:

As it turns out, the terminology that linked 4/20 with smoking pot took root in Northern California in the early 1970s, said Steve Bloom, the publisher of CelebStoner and the founder of Freedom Leaf magazine.

Bloom, however first came upon the connection when he was given a flier at a Grateful Dead concert at the Oakland-Alameda County Coliseum in 1990. The flier recounted the now-famous apocryphal tale that 420 was police code for a marijuana arrest in progress.

“The makers of the flier thought it was a good idea to turn that around and smoke on 4/20,” Bloom told Live Science.

The flier urged its readers to celebrate 4/20 as “the grandmaster of all holidays,” when they should meet up with friends to smoke pot together at 4:20 p.m. on 4/20, Bloom said. [5 Pot Facts for 4/20]

Bloom wrote about the flier in High Times magazine, and the idea soon took off, he said.

The date of the supposed green moon — 4/20 — and the amount of time that has passed since the last sighting — 420 years — are taken directly from cannabis culture, and this persistent rumor almost certainly started life as nothing more than a joke.

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