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

Other days

slime

Slime Day
bow tie

Bow Tie Day
ruby

Ruby Day
buddy

Buddy Day
singles

Singles Day
offer

Offer Day
ride the wind

Ride The Wind Day
stud

Stud Day
comfy

Comfy Day
lisp

Lisp Day