How 4/20 Has Come to be Known as 'Weed Day'

Yes, I know this comes a day late.

But I wondered for quite some time why this date, in particular (April 20th) came to be known as "Weed Day."

Apparently, the date corresponds with a numerical code for the drug, and this kind of grew...obviously.

It's time you learned how 4/20 became 'Weed Day' By Madeline Holcombe, April 20, 2017:

http://www.cnn.com/2017/04/20/health/420-origin-trnd/