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

Other days

lisp

Lisp Day
ruby

Ruby Day
mean girls

Mean Girls Day
blanket fort

Blanket Fort Day
nae nae

Nae Nae Day
pick me

Pick Me Day
unicorn

Unicorn Day
ride the wind

Ride The Wind Day
nail polish

Nail Polish Day
lash

Lash Day