How April 20 became the official 'Weed Day'

Marijuana smokers around the world recognize April 20 or 4/20 as the national cannabis holiday. But few actually know the origins of the date. Some say "420" was the penal code for smoking marijuana in California, but the numbers actually refer to “obstructing entry on public land." Another urban legend claims But the oldest rumor is that the term was coined by teens in California in the 70s, who met outside their school at 4:20 p.m. to search for the plants.