The origins of 420 have been traced to a secret code used by friends at San Rafael High School in the early 1970s. They would often meet at 4:20 p.m. to consume cannabis. Since then, it’s become a widely used phrase. 420 refers both to that time of day and April 20th. Dispensaries usually reach peak sales on and around the 4/20 holiday when consumers across the country gather to celebrate cannabis. “A slang term used to refer to cannabis or cannabis use in general. 420 can be used to refer to the time of day (4:20) which is used by weed enthusiasts as a time to meet up and smoke/vape/etc. 420 also refers to April 20th (4/20), which is
celebrated as an informal ‘weed holiday’. This popular term was coined in 1971 by kids attending San Rafael high school in southern California.”

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