Oops, it doesn't look like 'rng day' is a national day..

Other days

nail polish

Nail Polish Day
kiss a ginger

Kiss A Ginger Day
camera

Camera Day
boy friend

Boy Friend Day
bow tie

Bow Tie Day
kale

Kale Day
donate your hair

Donate Your Hair Day
lisp

Lisp Day
ormille

Ormille Day
prosecco

Prosecco Day