IOM_NUKSO: Většinu jsem znal, ale tohle ne :)
"420" did not originate from the Los Angeles police or penal code for marijuana use.[122] California Penal Code section 420 prohibits the obstruction of access to public land.[122][123] The use of "420" started in 1971 at San Rafael High School, where a group of students would go to smoke at 4:20 pm.[122]