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

Other days

bounce

Bounce Day
nae nae

Nae Nae Day
kale

Kale Day
blanket fort

Blanket Fort Day
my little pony

My Little Pony Day
bonang

Bonang Day
kiss a brunette

Kiss A Brunette Day
camera

Camera Day
one

One Day
book

Book Day