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

Other days

believe

Believe Day
camera

Camera Day
book

Book Day
bow tie

Bow Tie Day
get funky

Get Funky Day
nae nae

Nae Nae Day
mean girls

Mean Girls Day
cuddle up

Cuddle Up Day
ormille

Ormille Day
lash

Lash Day