Oops, it doesn't look like 'monumentmn road trip for the day' is a national day..

Other days

one

One Day
camera

Camera Day
lisp

Lisp Day
bubble bath

Bubble Bath Day
slime

Slime Day
cuddle up

Cuddle Up Day
cat girl

Cat Girl Day
gum

Gum Day
brow

Brow Day
book

Book Day