420 is known as the smokers holiday, weed day, a day to celebrate cannabis. Celebrations take place worldwide every year on April 20th from New York to San Francisco to Canada and the UK. What does 420 have to do with with marijuana? Why 420? The Huff post has a great historical piece that involved a group high school kids who hung out by and wall at school and eventually became know as the Waldo's, apparently these kids coined the phrase. Enjoy the 420 story on 420.

It goes like this: One day in the Fall of 1971 - harvest time - the Waldos got word of a Coast Guard service member who could no longer tend his plot of marijuana plants near the Point Reyes Peninsula Coast Guard station. A treasure map in hand, the Waldos decided to pluck some of this free bud.

The Waldos were all athletes and agreed to meet at the statue of Louis Pasteur outside the school at 4:20, after practice, to begin the hunt.

“We would remind each other in the hallways we were supposed to meet up at 4:20. It originally started out 4:20-Louis and we eventually dropped the Louis,” Waldo Steve tells the Huffington Post.

The first forays out were unsuccessful, but the group kept looking for the hidden crop. “We’d meet at 4:20 and get in my old ‘66 Chevy Impala and, of course, we’d smoke instantly and smoke all the way out to Pt. Reyes and smoke the entire time we were out there. We did it week after week,” says Steve. “We never actually found the patch.”

But they did find a useful codeword. “I could say to one of my friends, I’d go, 420, and it was telepathic. He would know if I was saying, ‘Hey, do you wanna go smoke some?’ Or, ‘Do you have any?’ Or, ‘Are you stoned right now?’ It was kind of telepathic just from the way you said it,” Steve says. “Our teachers didn’t know what we were talking about. Our parents didn’t know what we were talking about.”