420 Day

420 Day History

420 Day is a counterculture holiday that celebrates the use of marijuana. This day aims to promote the responsible use of marijuana while also advocating for its legalization. Typically events and festivals are held in celebration of the day.

420 Day is believed to have been started by a group of Californian high school students. It’s said that they came up with the name 4:20 Louis for their plan to find a marijuana field shown on a treasure map. The plan was to meet at 4:20 p.m. Eventually, 4:20 spread as a term to mean marijuana use in general and a popular time to consume it. Thus, April 20 (4/20 in the U.S. format) became a day of celebration.

Top 10 Facts for 420 Day in 2026

• The term originated in 1971 with a group of five San Rafael High School students known as the Waldos, who used the code to coordinate searches for an abandoned cannabis crop near a statue of Louis Pasteur at 4:20 PM.
• The phrase transitioned from a local secret to a global phenomenon largely due to the group's connection to the Grateful Dead bassist Phil Lesh, which helped the slang spread through the band's Deadheads fan base during their tours.
• Public awareness of the observance was significantly boosted in 1991 when High Times magazine published a flyer for a "420-ing" event in Marin County and later formally identified the Waldos as the true creators of the term in 1998.
• The upcoming 2026 celebrations coincide with major federal policy shifts in the United States, as administrative processes continue to transition cannabis from a Schedule I to a Schedule III classification under the Controlled Substances Act.
• Large-scale gatherings such as the Mile High 420 Festival in Denver and the National Cannabis Festival in Washington, D.C., serve as major cultural hubs where attendees participate in advocacy panels and live performances.
• Major entertainment lineups for the 2026 season include high-profile concerts at Red Rocks Amphitheatre featuring artists like Ice Cube, Wiz Khalifa, and Sublime.
• The event has deeply influenced mainstream media and is frequently referenced in cult classic films such as Half Baked, Dazed and Confused, and Pineapple Express.
• Many long-standing myths about the origin of the term have been debunked, including the popular but incorrect theories that it was a California police radio code or that it refers to the death date of musician Bob Marley.
• Beyond social festivities, the day is utilized as a global platform for civil disobedience and political lobbying to address social equity and the reform of international drug policies.
• In a move of academic recognition, the Oxford English Dictionary officially added 420 to its lexicon in 2017, citing historical documents preserved by the Waldos in a bank vault as the earliest recorded evidence of the term's use.

In the News and Trending in the US for 420 Day

Top things to do in the US for 420 Day

• Inform yourself on the reality of marijuana's dangers and benefits.
• If you are in Miami, mark the date for the Bhang Caribbean Cannabis Cruise. It's designed to bring together people that share an interest in marijuana. There's no marijuana consumption on board but there will be Cannabis-related informative events and the typical amenities of a cruise.
• Find out about rallies and participate if you feel strongly about the legalization of marijuana in your state.
• If your state doesn't allow the recreational use of marijuana, you can still celebrate by doing other activities. Many places celebrate the day with raffles or special dishes such as at BrainDead Brewing in Dallas, Texas or at Drinkhouse Fire & Ice in Miami, Florida.