The term "420" is a slang in cannabis culture that is used to refer to marijuana and hashish consumption, especially smoking around the time 4:20 pm
. The most credible story traces "420" to Marin County, Calif., in 1971, where five students at San Rafael High School would meet at 4:20 p.m. by the campus' statue of chemist Louis Pasteur to smoke marijuana. They chose that specific time because extracurricular activities had usually ended by then. This group became known as the "Waldos" and would say "420" to each other as code for marijuana
. The term was later popularized by the band Grateful Dead and has since become synonymous with the drug
