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

Other days

gum

Gum Day
offer

Offer Day
kiss a ginger

Kiss A Ginger Day
gallery

Gallery Day
girl friend

Girl Friend Day
lisp

Lisp Day
lash

Lash Day
ride the wind

Ride The Wind Day
frozen yogurt

Frozen Yogurt Day
ormille

Ormille Day