What does pot reference "420" mean, referring to marijuana? or where did it come from?
It means national weed day. Which falls on April (the fourth month of the year) 20th of every year. It's just the day where all the hard-core smokers get together and have fun doing what they do best.
it comes from a group of high school kids who went to the Louis Pastuer statue every day at 4:20 P.M. and the term just became widespread.