Oops, it doesn't look like 'spitting in mouth day' is a national day..

Other days

brow

Brow Day
cuddle up

Cuddle Up Day
nae nae

Nae Nae Day
hannah

Hannah Day
tulip

Tulip Day
blanket fort

Blanket Fort Day
lisp

Lisp Day
law

Law Day
slime

Slime Day
hiv awareness

Hiv Awareness Day