Oops, it doesn't look like 'be nice to a black man day' is a national day..

Other days

ruby

Ruby Day
carpenters

Carpenters Day
cat girl

Cat Girl Day
pumpkin

Pumpkin Day
ride the wind

Ride The Wind Day
buddy

Buddy Day
brow

Brow Day
girl friend

Girl Friend Day
offer

Offer Day
bounce

Bounce Day