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

Other days

me

Me Day
lash

Lash Day
ruby

Ruby Day
tell a fairytale

Tell A Fairytale Day
lisp

Lisp Day
pick me

Pick Me Day
offer

Offer Day
bow tie

Bow Tie Day
cuddle up

Cuddle Up Day
mean girls

Mean Girls Day