Oops, it doesn't look like 'black cat chocolate day' is a national day..

Other days

blanket fort

Blanket Fort Day
my little pony

My Little Pony Day
lumpy rug

Lumpy Rug Day
gallery

Gallery Day
boy friend

Boy Friend Day
lisp

Lisp Day
coffee

Coffee Day
lash

Lash Day
gum

Gum Day
buddy

Buddy Day