Reverse day is a day of the week that occurs every Monday and which is called “Reverse Monday” and was confirmed on March 28 2006
by Thenameisjeff17530 January 28, 2019

its like the patrick day but if you have green color you will get pinched, it happens on September 17
by random_redditor69 September 04, 2021

by The fat kid next door February 18, 2009

by The Real OG 13 June 15, 2018

by bigboppo November 22, 2020

On October 21, any time someone says they will do something to you, you can say "but it's National UNO reverse card day" and they must either do it to themselves or claim "but it's National UNO reverse card day" back. In the scenario the last person to say "but it's National UNO reverse card day" before the end of October 21 is the one to receive the action in the end.
Wizard: I'm gonna punch your face!
Bard: But it's National UNO reverse card day.
Wizard: Dies of 1d4 punched self in face damage.
Bard: But it's National UNO reverse card day.
Wizard: Dies of 1d4 punched self in face damage.
by EchoTheMythical October 21, 2021
