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

Other days

ponytail

Ponytail Day
camera

Camera Day
one

One Day
comfy

Comfy Day
promposal

Promposal Day
bow tie

Bow Tie Day
my little pony

My Little Pony Day
artists

Artists Day
ride the wind

Ride The Wind Day
kiss a ginger

Kiss A Ginger Day