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

Other days

pumpkin

Pumpkin Day
nae nae

Nae Nae Day
donate your hair

Donate Your Hair Day
hot chocolate

Hot Chocolate Day
law

Law Day
camera

Camera Day
lumpy rug

Lumpy Rug Day
boy friend

Boy Friend Day
pick me

Pick Me Day
ormille

Ormille Day