Oops, it doesn't look like 'To Done List day' is a national day..

Other days

lisp

Lisp Day
kiss a ginger

Kiss A Ginger Day
one

One Day
ride the wind

Ride The Wind Day
unicorn

Unicorn Day
kale

Kale Day
camera

Camera Day
buddy

Buddy Day
ormille

Ormille Day
singles

Singles Day