The history of 420

This Monday, April 20th, marijuana enthusiasts around the globe will collectively burn in celebration of the day that has become unofficially recognized the world over as the most important date on the pot smoker's calendar. And though most people think of April 20th as special because of this attributed holiday status, it isn't really the day that's important, it's the numbers making up the date: 420. The number 420 has been associated with the marijuana subculture for years and doesn't just refer to the twentieth day or April, but is used as a general term for all aspects of marijuana usage. But what significance does the number 420 hold? Where did it come from and why is it so important to the marijuana subculture?

The original meaning of 420 is only known by the original 420 who were sworn to secrecy. The secret will die with them.