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

Other days

lash

Lash Day
self care

Self Care Day
prosecco

Prosecco Day
ride the wind

Ride The Wind Day
lost sock memorial

Lost Sock Memorial Day
tulip

Tulip Day
stud

Stud Day
gum

Gum Day
youth

Youth Day
one

One Day