420 is a code term that refers to the use of cannabis, especially smoking Marijuana. The term 420 originated in California in the 1970s and has since spread to other parts of the world. There are many different theories about how the word 420 came to be. Still, the most likely explanation is that it was started by a group of high school students who used it as a secret code to communicate with each other about their weed-smoking habits.
Today, 420 is widely known as a day to celebrate cannabis culture. Many people use the term to refer to anything related to Marijuana, including smoking, growing, selling, or buying it.