Oops, it doesn't look like 'heros every day' is a national day..

Other days

buddy

Buddy Day
blanket fort

Blanket Fort Day
boyfriend

Boyfriend Day
bow tie

Bow Tie Day
comfy

Comfy Day
carpenters

Carpenters Day
self care

Self Care Day
cat girl

Cat Girl Day
ponytail

Ponytail Day
singles

Singles Day