420, 4:20, or 4/20 (pronounced four-twenty) is a code-term that refers to the annual consumption of cannabis and by extension, as a way to identify oneself with cannabis culture. Observances based on the number 420 include smoking cannabis around the time 4:20 p.m., as well as smoking and celebrating cannabis on the date April 20 (4/20 in U.S. form).[1]