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

Other days

martini

Martini Day
brow

Brow Day
lash

Lash Day
bow tie

Bow Tie Day
chocolate milkshake

Chocolate Milkshake Day
stud

Stud Day
boy friend

Boy Friend Day
ruby

Ruby Day
pumpkin

Pumpkin Day
one

One Day