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

Other days

raise awerness of zeus

Raise Awerness Of Zeus Day
self care

Self Care Day
china

China Day
youth

Youth Day
stud

Stud Day
kiss a brunette

Kiss A Brunette Day
boy friend

Boy Friend Day
comfy

Comfy Day
pampering

Pampering Day
nae nae

Nae Nae Day