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

Other days

lisp

Lisp Day
buddy

Buddy Day
latina equal pay

Latina Equal Pay Day
unicorn

Unicorn Day
cursing

Cursing Day
lumpy rug

Lumpy Rug Day
girl friend

Girl Friend Day
kiss a brunette

Kiss A Brunette Day
gum

Gum Day
donate your hair

Donate Your Hair Day