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

Other days

brow

Brow Day
camera

Camera Day
book

Book Day
kiss a ginger

Kiss A Ginger Day
ruby

Ruby Day
ponytail

Ponytail Day
fiancee

Fiancee Day
nae nae

Nae Nae Day
kiss a brunette

Kiss A Brunette Day
cat girl

Cat Girl Day