Oops, it doesn't look like 'to done list day' is a national day..

Other days

hoodie

Hoodie Day
lisp

Lisp Day
nae nae

Nae Nae Day
coffee

Coffee Day
ormille

Ormille Day
lash

Lash Day
embarrass your best friend

Embarrass Your Best Friend Day
cuddle up

Cuddle Up Day
gum

Gum Day
blanket fort

Blanket Fort Day