Why is the number 420 popular?

Why Is 420 So Popular?

Chances are you've seen the number 420 pop up—on T-shirts, in social media posts, or whispered in conversation around April 20th. But what does it actually mean? Far from a random sequence, 420 has deep roots in cannabis culture.

The term traces back to the early 1970s, when a group of high school students in California would gather at 4:20 p.m. to search for a rumored abandoned cannabis crop. They used "4:20" as code to meet up without drawing attention. Over time, the phrase evolved into a secret handshake among cannabis enthusiasts. Thanks in part to the Grateful Dead and their fans, the term spread through music festivals and countercultural circles.

Today, 420 isn't just a time—it's a full-blown cultural phenomenon. On April 20th each year, cities across the U.S. and beyond host gatherings, protests, and celebrations centered around cannabis advocacy and use. From Denver to Seattle, crowds assemble at 4:20 p.m. sharp to light up in unison, turning the date into a symbolic day of unity for the movement.

But it's more than just partying. For many, 4/20 represents a call for legalization, social justice reform, and the destigmatization of marijuana use. What started as a teenage ritual has grown into a global statement.

Even pop culture has embraced it—movies, music, and brands reference 420, sometimes playfully, sometimes provocatively. And while not everyone knows its origin, the number now carries a legacy far beyond the clock.