what is 420

420 is a term used in cannabis culture to refer to marijuana and hashish consumption, especially smoking around the time 4:20 pm). It is celebrated every year on April 20, a date that both marijuana smokers and non-smokers recognize as a national holiday for cannabis culture. The origin of the term is not entirely clear, but the most credible story traces 4/20 to Marin County, California, 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 partake. They chose that specific time because extracurricular activities had usually ended by then. This group became known as the “Waldos” because they met at a wall. They would say “420” to each other as code for marijuana. Later, the term was popularized by the Grateful Dead, who helped spread it through their fans).