Oops, it doesn't look like 'hung the fuck over day' is a national day..

Other days

nae nae

Nae Nae Day
girl friend

Girl Friend Day
comfy

Comfy Day
reading

Reading Day
one

One Day
cat girl

Cat Girl Day
bow tie

Bow Tie Day
camera

Camera Day
get funky

Get Funky Day
carpenters

Carpenters Day