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

Other days

lisp

Lisp Day
singles

Singles Day
ruby

Ruby Day
prosecco

Prosecco Day
hiv awareness

Hiv Awareness Day
cat girl

Cat Girl Day
stress awareness

Stress Awareness Day
pampering

Pampering Day
fiancee

Fiancee Day
aloxolt

Aloxolt Day