April 20, or 4/20, is known as "Weed Day" in some circles because the date corresponds with a numerical code for marijuana.
Yes, it seems arbitrary. So how did the number 420 come to represent smoking pot?
First, let's get the myths and rumors out of the way:
The legend of the California penal code
Some claim the number is drawn from the California criminal codes used to punish the use or distribution of marijuana. But the state's 420 code actually applies to obstructing entry on public land. So, not quite.
