Last Updated: March 2026
If you've been smoking weed for any amount of time, you know April 20 — 4/20 — is the unofficial holiday of cannabis culture. But where did it come from? Why 4:20? Why April 20th? The origin story of the most famous date in marijuana history is more interesting than most people realize, and it has nothing to do with Bob Marley, police codes, or Adolf Hitler (all common myths).
The True Origin of 4/20
The real origin of 4/20 traces back to 1971 in San Rafael, California. A group of five high school students at San Rafael High School — Steve Capper, Dave Reddix, Jeffrey Noel, Larry Schwartz, and Mark Gravich, who called themselves "the Waldos" because they liked to hang out by a wall — would meet after school at 4:20 PM to smoke marijuana and hunt for a rumored abandoned cannabis crop near Point Reyes.
The Waldos would remind each other of their daily meeting spot and time with the code phrase "4:20 Louis" — Louis being a reference to a Louis Pasteur statue at their school. Over time, it shortened to simply "420." The abandoned marijuana crop was never found, but the code stuck.
The phrase spread beyond the Waldos thanks to their connections with the Grateful Dead — Dave Reddix's older brother managed a Dead side band and introduced the Waldos to the Dead's inner circle. The term "420" spread through Deadhead culture, and by the late 1980s and early 1990s, it had entered the broader weed community.
In 1990, a flyer circulated at a Grateful Dead concert encouraging people to gather at the Marin County Civic Center on April 20 at 4:20 PM. A copy of that flyer reached Steve Bloom, then a reporter for High Times magazine, who published it in 1991. High Times then began incorporating "420" into their coverage, and the rest is marijuana history.
The Myths — Debunked
Because the true origin wasn't widely documented until the Waldos came forward with evidence in the 2000s, dozens of myths filled the void. Here are the most common ones, and why they're wrong:
Myth: 420 is the police radio code for marijuana
False. There is no universal police radio code 420 for marijuana. California's penal code 420 actually refers to obstruction of entry on public land — nothing to do with weed. This myth probably persists because it sounds authoritative, but it has no factual basis.
Myth: 420 is the number of chemical compounds in marijuana
False. Cannabis contains hundreds of compounds, but the number isn't 420. Scientists have identified over 500 distinct compounds in marijuana. The "420 compounds" claim is simply invented.
Myth: 4:20 PM is when Bob Marley died
False. Bob Marley died at 11:45 AM on May 11, 1981. The date is also wrong — his death had no connection to April 20.
Myth: April 20 is Hitler's birthday, and stoners adopted it ironically
While Hitler was indeed born on April 20, 1889, there is zero evidence the Waldos or anyone in the early 420 community chose this date for any ironic reason. The connection is coincidental and has no basis in the actual origin story.
How 4/20 Evolved Into a Global Holiday
From its Bay Area high school origins, 4/20 evolved through distinct cultural phases:
The Deadhead Years (1971–1990)
The term "420" lived almost exclusively within Grateful Dead touring culture for nearly two decades. It was an insider code — a way for weed smokers to identify each other and signal smoking sessions without being obvious. The Dead's nomadic community spread it coast to coast.
The High Times Amplification (1991–2000)
High Times' coverage transformed 420 from a subcultural code to a mainstream marijuana symbol. The magazine's reach into the broader cannabis community made 4/20 a recognized date for weed celebration nationwide.
The Legalization Era (2010–present)
As marijuana legalization spread across US states — starting with Colorado and Washington in 2012 — 4/20 emerged as a mainstream cultural event. Annual 4/20 gatherings in Denver, San Francisco, and Seattle began drawing tens of thousands of participants. Corporate cannabis brands began running 4/20 sales. By the 2020s, even mainstream media covered 4/20 as a legitimate cultural holiday.
The THCa Era (2020–present)
The 2018 Farm Bill legalized hemp and hemp-derived products containing less than 0.3% delta-9 THC by dry weight. This created the federally legal THCa flower market, allowing people across the US to participate in 4/20 traditions by ordering premium flower online — regardless of their state's marijuana legalization status. 4/20 2026 will be one of the first major cannabis holidays fully accessible to most Americans through legal online channels.
Why 4/20 Still Matters in 2026
Some people dismiss 4/20 as a stoner joke, but it represents something more meaningful: the long arc of normalization for marijuana and cannabis culture. A date that began as a code among five California teenagers in 1971 is now recognized globally, celebrated in cities from Denver to Amsterdam, and marked by the cannabis industry as its most significant annual moment.
In 2026, with federally legal THCa flower available online and marijuana legal in the majority of US states, 4/20 has become genuinely mainstream. Office workers, athletes, retirees, parents — people who would never have identified as "stoners" — celebrate 4/20 openly. The holiday has been reclaimed from its counterculture origins and embraced as a normal part of modern American life.
How to Celebrate 4/20 in 2026
Whether you're a first-timer or a 4/20 veteran, here are ways to mark the holiday meaningfully:
Order your favorite weed in advance — browse Rare Harvest's THCa flower collection and place your order by April 14-17 to guarantee delivery before 4/20. Try a new strain you haven't experienced before — 4/20 is the perfect occasion for something exotic. Connect with the community, whether at a local 4/20 event or through online cannabis communities. Take a moment to appreciate how far marijuana culture has come — from a five-teenager code word to a globally recognized holiday.
2026 Legal Status
All Rare Harvest THCa flower is federally legal under the 2018 Farm Bill, containing less than 0.3% delta-9 THC by dry weight and shipped via USPS to most US states. See our 4/20 deals guide for the best strains and pricing this holiday season.
Frequently Asked Questions
Why is 420 associated with weed?
The term originated with a group of California high school students called "the Waldos" in 1971, who used "4:20" as a code for their after-school marijuana smoking sessions. It spread through Grateful Dead culture, was amplified by High Times magazine, and eventually became the globally recognized symbol for cannabis culture.
Why is April 20 weed day?
Because 4:20 (4/20 in US date format) was the meeting time and code used by the original group of cannabis-celebrating students. When the term was published in High Times magazine in 1991, April 20 became the calendar date associated with weed culture.
Is 420 related to a police code?
No. This is one of the most persistent myths about 4/20. There is no standard police code 420 for marijuana. The true origin is the San Rafael, California high school students who used it as a private code in 1971.
What do people do on 4/20?
In 2026, 4/20 celebrations range from solo smoke sessions to large public gatherings in cities like Denver, San Francisco, and Seattle. Many people order special strains online, attend cannabis events, or simply enjoy the holiday with friends. It's increasingly treated as a mainstream cultural holiday.
Ready to celebrate 4/20 properly? Shop Rare Harvest's premium THCa flower collection and check out our 4/20 deals guide for the best strains and savings this April.