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

Other days

bounce

Bounce Day
pampering

Pampering Day
cursing

Cursing Day
kiss a brunette

Kiss A Brunette Day
cuddle up

Cuddle Up Day
bow tie

Bow Tie Day
get funky

Get Funky Day
ruby

Ruby Day
china

China Day
girl friend

Girl Friend Day