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

Other days

polyamory

Polyamory Day
stud

Stud Day
boy friend

Boy Friend Day
get funky

Get Funky Day
ask out your crush

Ask Out Your Crush Day
lumpy rug

Lumpy Rug Day
hoodie

Hoodie Day
nail polish

Nail Polish Day
pampering

Pampering Day
bow tie

Bow Tie Day