The number 420 has become a popular code for marijuana and the “national holiday” has been taken off during the last several years. Have you ever wondered where did that term come from? According to Warren Haynes, who is the current guitarist for the Grateful Dead said the term “420” was widely used by the end of the 1970s. It began with a group of stoners who called themselves the “Waldos” because they liked to hang out in front of a wall. 420 was the code word they used for their activities. The group usually met in front of the statue on school grounds to get high at 4:20 p.m. The term was so popularly used, it became the universal term for marijuana.