420 day 

April 20th. A great day for a 420.

Hey it's 420 day, lets go get stoned.

420 day by Fuzzy May 1, 2006

420 Flash a Friend Day 

On 4/20, in support of marijuana legalization flash a friend (can be done by male or female).

I just saw 2 topless women on 420 flash a friend day in support of legalization!

420 Flash a Friend Day by SubwayJered April 20, 2019