Oops, it doesn't look like 'give a cop a boner day' is a national day..

Other days

slime

Slime Day
kiss a brunette

Kiss A Brunette Day
self care

Self Care Day
comfy

Comfy Day
brow

Brow Day
hot chocolate

Hot Chocolate Day
lash

Lash Day
tulip

Tulip Day
mean girls

Mean Girls Day
book

Book Day