Oops, it doesn't look like 'hero the day' is a national day..

Other days

stud

Stud Day
cuddle up

Cuddle Up Day
boy friend

Boy Friend Day
self appreciation

Self Appreciation Day
first love

First Love Day
bonang

Bonang Day
fiancee

Fiancee Day
law

Law Day
polyamory

Polyamory Day
hot chocolate

Hot Chocolate Day