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

Other days

tell a fairytale

Tell A Fairytale Day
fiancee

Fiancee Day
kiss a brunette

Kiss A Brunette Day
one

One Day
nae nae

Nae Nae Day
my little pony

My Little Pony Day
self care

Self Care Day
kale

Kale Day
buddy

Buddy Day
brow

Brow Day