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

Other days

ruby

Ruby Day
blanket fort

Blanket Fort Day
cuddle up

Cuddle Up Day
comfy

Comfy Day
cursing

Cursing Day
kiss a brunette

Kiss A Brunette Day
fiancee

Fiancee Day
law

Law Day
lisp

Lisp Day
lash

Lash Day