Puff Puff … Cough Cough … Pass and Stop! Today, April 20th or 4/20 is deemed as National Weed Day. A day where cannabis lovers can get together, roll something, smoke something, laugh and joke about the lame individual who can’t roll a simple joint (sounds like any other day). But where does this day come from? It didn’t just grow from the ground up. Check out the story behind National Weed Day, after the jump.