• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
LifestyleDrugs

‘It’s a phenomenon’: How 4/20 grew organically from a group of Northern California high schoolers into marijuana’s holiday

By
Gene Johnson
Gene Johnson
and
The Associated Press
The Associated Press
Down Arrow Button Icon
By
Gene Johnson
Gene Johnson
and
The Associated Press
The Associated Press
Down Arrow Button Icon
April 19, 2024, 10:00 AM ET
The Waldos
The Waldos, from left, Mark Gravitch, Larry Schwartz, Dave Reddix, Jeffrey Noel and Steve Capper sit on a wall they used to frequent at San Rafael High School in San Rafael, Calif., April 13, 2018.Eric Risberg—AP Photo

Saturday marks marijuana culture’s high holiday, 4/20, when college students gather — at 4:20 p.m. — in clouds of smoke on campus quads and pot shops in legal-weed states thank their customers with discounts.

Recommended Video

This year’s edition provides an occasion for activists to reflect on how far their movement has come, with recreational pot now allowed in nearly half the states and the nation’s capital. Many states have instituted “social equity” measures to help communities of color, harmed the most by the drug war, reap financial benefits from legalization. And the White House has shown an openness to marijuana reform.

Here’s a look at 4/20’s history:

WHY 4/20?

The origins of the date, and the term “420” generally, were long murky. Some claimed it referred to a police code for marijuana possession or that it derived from Bob Dylan’s “Rainy Day Women No. 12 & 35,” with its refrain of “Everybody must get stoned” — 420 being the product of 12 times 35.

But the prevailing explanation is that it started in the 1970s with a group of bell-bottomed buddies from San Rafael High School, in California’s Marin County north of San Francisco, who called themselves “the Waldos.” A friend’s brother was afraid of getting busted for a patch of cannabis he was growing in the woods at nearby Point Reyes, so he drew a map and gave the teens permission to harvest the crop, the story goes.

During fall 1971, at 4:20 p.m., just after classes and football practice, the group would meet up at the school’s statue of chemist Louis Pasteur, smoke a joint and head out to search for the weed patch. They never did find it, but their private lexicon — “420 Louie” and later just “420” — would take on a life of its own.

The Waldos saved postmarked letters and other artifacts from the 1970s referencing “420,” which they now keep in a bank vault, and when the Oxford English Dictionary added the term in 2017, it cited some of those documents as the earliest recorded uses.

HOW DID ‘420’ SPREAD?

A brother of one of the Waldos was a close friend of Grateful Dead bassist Phil Lesh, as Lesh once confirmed in an interview with the Huffington Post, now HuffPost. The Waldos began hanging out in the band’s circle and the slang spread.

Fast-forward to the early 1990s: Steve Bloom, a reporter for the cannabis magazine High Times, was at a Dead show when he was handed a flier urging people to “meet at 4:20 on 4/20 for 420-ing in Marin County at the Bolinas Ridge sunset spot on Mt. Tamalpais.” High Times published it.

“It’s a phenomenon,” one of the Waldos, Steve Capper, now 69, once told The Associated Press. “Most things die within a couple years, but this just goes on and on. It’s not like someday somebody’s going to say, ‘OK, Cannabis New Year’s is on June 23rd now.’”

While the Waldos came up with the term, the people who made the flier distributed at the Dead show — and effectively turned 4/20 into a holiday — remain unknown.

HOW IS IT CELEBRATED?

With weed, naturally.

Some celebrations are bigger than others: The Mile High 420 Festival in Denver, for example, typically draws thousands and describes itself as the largest free 4/20 event in the world. Hippie Hill in San Francisco’s Golden Gate Park has also attracted massive crowds, but the gathering was canceled this year, with organizers citing a lack of financial sponsorship and city budget cuts.

College quads and statehouse lawns are also known for drawing 4/20 celebrations, with the University of Colorado Boulder historically among the largest, though not so much since administrators banned the annual smokeout over a decade ago.

Some breweries make beers that are 420-themed, but not laced, including SweetWater Brewing in Atlanta, which is throwing a 420 music festival this weekend and whose founders went to the University of Colorado.

Lagunitas Brewing in Petaluma, California, releases its “Waldos’ Special Ale” every year on 4/20 in partnership with the term’s coiners. That’s where the Waldos will be this Saturday to sample the beer, for which they picked out “hops that smell and taste like the dankest marijuana,” one Waldo, Dave Reddix, said via email.

4/20 has also become a big industry event, with vendors gathering to try each other’s wares.

THE POLITICS

The number of states allowing recreational marijuana has grown to 24 after recent legalization campaigns succeeded in Ohio, Minnesota and Delaware. Fourteen more states allow it for medical purposes, including Kentucky, where medical marijuana legislation that passed last year will take effect in 2025. Additional states permit only products with low THC, marijuana’s main psychoactive ingredient, for certain medical conditions.

But marijuana is still illegal under federal law. It is listed with drugs such as heroin under Schedule I of the Controlled Substances Act, meaning it has no federally accepted medical use and a high potential for abuse.

The Biden administration, however, has taken some steps toward marijuana reform. The president has pardoned thousands of people who were convicted of “simple possession” on federal land and in the District of Columbia.

The Department of Health and Human Services last year recommended to the Drug Enforcement Administration that marijuana be reclassified as Schedule III, which would affirm its medical use under federal law.

According to a Gallup poll last fall, 70% of adults support legalization, the highest level yet recorded by the polling firm and more than double the roughly 30% who backed it in 2000.

Vivian McPeak, who helped found Seattle’s Hempfest more than three decades ago, reflected on the extent to which the marijuana industry has evolved during his lifetime.

“It’s surreal to drive by stores that are selling cannabis,” he said. “A lot of people laughed at us, saying, ‘This will never happen.’”

WHAT DOES IT MEAN?

McPeak described 4/20 these days as a “mixed bag.” Despite the legalization movement’s progress, many smaller growers are struggling to compete against large producers, he said, and many Americans are still behind bars for weed convictions.

“We can celebrate the victories that we’ve had, and we can also strategize and organize to further the cause,” he said. “Despite the kind of complacency that some people might feel, we still got work to do. We’ve got to keep earning that shoe leather until we get everybody out of jails and prisons.”

For the Waldos, 4/20 signifies above all else a good time.

“We’re not political. We’re jokesters,” Capper has said. “But there was a time that we can’t forget, when it was secret, furtive. … The energy of the time was more charged, more exciting in a certain way.

“I’m not saying that’s all good — it’s not good they were putting people in jail,” he continued. “You wouldn’t want to go back there.”

___

Associated Press writer Claire Rush contributed from Portland, Oregon.

Join us at the Fortune Workplace Innovation Summit May 19–20, 2026, in Atlanta. The next era of workplace innovation is here—and the old playbook is being rewritten. At this exclusive, high-energy event, the world’s most innovative leaders will convene to explore how AI, humanity, and strategy converge to redefine, again, the future of work. Register now.
About the Authors
By Gene Johnson
See full bioRight Arrow Button Icon
By The Associated Press
See full bioRight Arrow Button Icon

Latest in Lifestyle

HealthAffordable Care Act (ACA)
A Wisconsin couple was paying $2 a month for an ACA health plan. But as subsidies expire, it’s soaring to $1,600, forcing them to downgrade
By Ali Swenson and The Associated PressDecember 13, 2025
7 hours ago
Julian Braithwaite is the Director General of the International Alliance for Responsible Drinking
CommentaryProductivity
Gen Z is drinking 20% less than Millennials. Productivity is rising. Coincidence? Not quite
By Julian BraithwaiteDecember 13, 2025
9 hours ago
Nicholas Thompson
C-SuiteBook Excerpt
I took over one of the most prestigious media firms while training for an ultramarathon. Here’s what I learned becoming CEO of The Atlantic
By Nicholas ThompsonDecember 13, 2025
11 hours ago
Sarandos
Arts & EntertainmentM&A
It’s a sequel, it’s a remake, it’s a reboot: Lawyers grow wistful for old corporate rumbles as Paramount, Netflix fight for Warner
By Nick LichtenbergDecember 13, 2025
12 hours ago
Healthmeal delivery
Factor Meals Review 2025: Tester Approved
By Christina SnyderDecember 12, 2025
1 day ago
Donald Trump
HealthHealth Insurance
‘Tragedy in the making’: Top healthcare exec on why insurance will spike to subsidize a tax cut to millionaires and billionaires
By Nick LichtenbergDecember 12, 2025
1 day ago

Most Popular

placeholder alt text
Economy
Tariffs are taxes and they were used to finance the federal government until the 1913 income tax. A top economist breaks it down
By Kent JonesDecember 12, 2025
1 day ago
placeholder alt text
Success
Apple cofounder Ronald Wayne sold his 10% stake for $800 in 1976—today it’d be worth up to $400 billion
By Preston ForeDecember 12, 2025
1 day ago
placeholder alt text
Success
40% of Stanford undergrads receive disability accommodations—but it’s become a college-wide phenomenon as Gen Z try to succeed in the current climate
By Preston ForeDecember 12, 2025
1 day ago
placeholder alt text
Economy
The Fed just ‘Trump-proofed’ itself with a unanimous move to preempt a potential leadership shake-up
By Jason MaDecember 12, 2025
1 day ago
placeholder alt text
Economy
For the first time since Trump’s tariff rollout, import tax revenue has fallen, threatening his lofty plans to slash the $38 trillion national debt
By Sasha RogelbergDecember 12, 2025
1 day ago
placeholder alt text
Success
Apple CEO Tim Cook out-earns the average American’s salary in just 7 hours—to put that into context, he could buy a new $439,000 home in just 2 days
By Emma BurleighDecember 12, 2025
1 day ago
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Fortune Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map

© 2025 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.