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

Other days

law

Law Day
comfy

Comfy Day
kiss a ginger

Kiss A Ginger Day
gum

Gum Day
slime

Slime Day
cursing

Cursing Day
brow

Brow Day
embarrass your best friend

Embarrass Your Best Friend Day
china

China Day
kiss a brunette

Kiss A Brunette Day