4/20, also known as the Cannabis Culture Holiday, is observed worldwide every April 20. This counterculture holiday is dedicated to smoking and celebrating cannabis. The term "420" is believed to have originated from a group of teenagers known as the Waldos in San Rafael, California, who in 1971 used it as a code for their plan to search for an abandoned cannabis crop at 4:20 p.m. on a specific day. On this date, cannabis smokers typically consume marijuana and may organize events advocating for the legalization of cannabis. While the holiday is widely celebrated, it is important to note that possession of cannabis remains illegal in most countries. As of 2023, recreational cannabis use has been legalized in several countries, including Canada, Mexico, and various states in the U.S.