Although it’s nearly impossible to confirm, most agree that the number first attached itself to marijuana at a California high school around 1971. According to one story, a group of five teenagers at San Rafael High School who called themselves “the Waldos,” (because they always hung out by a wall) found a hand-drawn map that supposedly led to a massive marijuana crop at Point Reyes, northwest of San Francisco. The Waldos agreed to meet by their school’s statue of Louis Pasteur around 4:20 p.m. and try to find the crop (the phrase was originally 420-Louis, in reference to the statue, but the second part was eventually dropped). The five Waldos never had any luck with the map or the crop, but every adventure started with a smoke session before heading out.
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