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

Other days

slime

Slime Day
get funky

Get Funky Day
nail polish

Nail Polish Day
buddy

Buddy Day
blanket fort

Blanket Fort Day
kiss a brunette

Kiss A Brunette Day
lash

Lash Day
singles

Singles Day
camera

Camera Day
ruby

Ruby Day