4/20 ... that's one heck of a visual acuity measure ! ... eyesight worth celebrating. (^_^), ... if only this were what the numbers referenced. I must admit that I had to look it up.
Alas, I object to smoking anything, and so I cannot conceive of marketing to a smoking crowd.
Some people think that 5:30PM on a Friday is the best time to start drinking a relaxing drink of wine (calling it "wine thirty"). Why not have a holiday for this too?