Oops, it doesn't look like 'Stick Up The Ass day' is a national day..

Other days

believe

Believe Day
law

Law Day
cuddle up

Cuddle Up Day
get funky

Get Funky Day
comfy

Comfy Day
nae nae

Nae Nae Day
coffee

Coffee Day
frozen yogurt

Frozen Yogurt Day
healing

Healing Day
kiss a ginger

Kiss A Ginger Day