Not unlike the fragrant smoke cascading from Willie Nelson's tour bus, myths about the origins of "4/20" (or "4:20") swirl and obscure the true origins of the official stoners' holiday.
According to one erroneous explanation, "420" was the police code for "marijuana smoking in progress." Other stories suggest it correlated with a daily after-school smoking session, which would commence at 4:20 p.m.
That last one is at least partially correct. But the true origin of the pot smoker's holiday is actually much more interesting. And if you choose to indulge this Easter, or on any day, make sure you understand the law (we'll get to that in a bit).