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

Other days

artists

Artists Day
get funky

Get Funky Day
camera

Camera Day
donate your hair

Donate Your Hair Day
stud

Stud Day
boyfriend

Boyfriend Day
ormille

Ormille Day
polyamory

Polyamory Day
eat what you want

Eat What You Want Day
bow tie

Bow Tie Day