National UNO reverse card day

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.