420
/ˈfɔːr ˈtwɛnti/
420 is a slang term that refers to cannabis culture, particularly the consumption of marijuana. The number 420 is most commonly associated with the time 4:20 PM, a period often cited as a socially recognized time to smoke or consume marijuana. It is also closely tied to the date April 20th (written as 4/20 in the United States), which is now an unofficial holiday celebrating cannabis.