From the desk of Ryan Grim:
420 History: The Story Behind April 20 Becoming ‘Weed Day’
Warren Haynes, the Allman Brothers Band guitarist, routinely plays with the surviving members of the Grateful Dead, now touring as The Dead. He’s just finished aDead show in Washington, D.C. and gets a pop quiz from the Huffington Post.
Where does 420 come from?