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Updated Apr 17, 2015 at 11:37AM EDT by Triple Zed.

Added Jul 17, 2012 at 08:18AM EDT by GanjaClaus.

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For the correct entry related to the term “420” and it’s related phrase “Blaze It”, please head to the KYM Entry for 420 Blaze It.


420, 4:20, or 4/20 (pronounced four-twenty) is primarily a term used in North America to refer to the consumption of cannabis and,
by extension, a way to identify oneself with cannabis SUBCULTURE (Wikipedia)

420 is a code word that has become prevalent in the cannabis subculture. Accredited to a group of San Rafael High School students in 1971, the phrase has become a global symbol of cannabis use and tolerance. On April 20th, “420 friendly” individuals congregate to celebrate cannabis culture and consume the drug.

The term 420 can be used to refer to marijuana, but it is not a code word used by police, which is a common myth among many. Another common myth related to this term is that “420” actually refers to the number of chemicals that are in marijuana. This is also untrue, as there are no synthetic chemicals in cannabis. It is a naturally occuring plant. The term “420 friendly” is commonly used among those who smoke and even those who do not to refer to people or places that are acceptable and open to the use of marijuana.

More info on the history of the 420 subculture

HIGH TIMES: Fueling the concept of 420 and making it a counter cultural institution

HIGH TIMES: Their most famous Covers

Myths and facts about 420

These days ‘420’ is used as a generic way of declaring one likes to use marijuana or just as a term for the substance itself. Its earliest connotation of having to do with the time a certain group of students congregated to smoke wacky tobaccy is unknown to the overwhelming majority of those who now employ the term. Indeed, most instead believe one or more of the many spurious explanations that have since grown up about this much abused short form:

  • 420 is the penal code section for marijuana use in California.

    Nope. Section 420 of the California penal code refers to obstructing entry on public land. The penal codes of other states list different entries for 420, but none of them matches anything having to do with marijuana.

    However, on 1 January 2004 the Governor of California signed that state’s ‘California Senate Bill 420’ which regulates marijuana used for medical purposes. This bill comes years after the term ‘420’ was associated with marijuana and indeed its number likely was chosen because of the existing pop culture connection. This is the tail wagging the dog, not the other way around.

  • It’s the Los Angeles or New York police radio code for marijuana smoking in progress.

    It’s not the ‘Police Radio Codes’ for anything, let alone that.

  • It’s the number of chemical compounds in marijuana.

    The number of chemical compounds in marijuana is 315, according to the folks at High Times magazine.

  • April 20 is the date that Jim Morrison, Jimi Hendrix, or Janis Joplin died.

    Though these performers were strongly identified with drug use during their brief lifetimes and the emerging drug culture after their demises, none of them kicked the bucket on April 20. Morrison died on July 3, Hendrix on September 18, and Joplin on October 4.

  • The 20th of April is the best time to plant marijuana.

    There’s no one “best time” — that answer would change from one part of the country to another, or even one country to another.

  • Albert Hofmann took the first deliberate LSD trip at 4:20 on 19 April 1943.

    This was indeed the case — his lab notes back this up. But this wasn’t the source of “420,” just an oddball coincidence. (For the pedants out there, Hofmann’s first LSD trip, which was accidental, took place on 16 April 1943.)

  • It’s the code you send to your drug dealer’s pager.

    Yeah, right. All drug dealers recognize a ‘420’ page as “Please be waiting on the corner with my baggie of wildwood weed.”

  • When the Grateful Dead toured, they always stayed in Room 420.

    Untrue, says Grateful Dead Productions spokesman Dennis McNally.

Spurious etymologies and uncertain definition aside, ‘420’ has slipped into a position of semi-respectability within the English lexicon. Various free-wheeling cities annually celebrate “hemp fests” on April 20. There’s a 4:20 record label in California, and a band called 4:20. Atlanta’s Sweetwater Brewing Co. sells its 420 Pale Ale in supermarkets and opens its doors to the public at 4:20 p.m. Mondays through Thursdays. New York’s 420 Tours sells low-cost travel packages to the Netherlands and Jamaica. Highway 420 Radio broadcasts “music for the chemically enhanced.” And in 2001, the forReal.org web site of the U.S. Department of Health and Human Services’ Center for Substance Abuse Prevention put out a public service document titled, “It’s 4:20 — Do You Know Where Your Teen Is?”

420s are routinely slipped into popular movies and television shows. In Fast Times at Ridgemont High the score of the football game was 42-0. Most of the clocks in Pulp Fiction are set to 4:20 (but not all — when the kid receives the watch it’s set at 9:00). And there are many other instances, so keep your eyes peeled.

However, as amusing as it is to tie 420 to pot smoking and hunt for it in popular movies, the number has its dark side. Hitler was born on 20 April 1889, and the massacre of 13 victims at Columbine High School in Colorado took place on 20 April 1999.


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