Oops, it doesn't look like 'Dank Memes And Oaky Anniversary day' is a national day..

Other days

slime

Slime Day
cat girl

Cat Girl Day
tulip

Tulip Day
cuddle up

Cuddle Up Day
mean girls

Mean Girls Day
gum

Gum Day
nae nae

Nae Nae Day
lisp

Lisp Day
lash

Lash Day
fiancee

Fiancee Day