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

Other days

kale

Kale Day
kiss a ginger

Kiss A Ginger Day
singles

Singles Day
my little pony

My Little Pony Day
bow tie

Bow Tie Day
one

One Day
latina equal pay

Latina Equal Pay Day
boyfriend

Boyfriend Day
hannah

Hannah Day
buddy

Buddy Day