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

Other days

mean girls

Mean Girls Day
lash

Lash Day
bow tie

Bow Tie Day
law

Law Day
kiss a brunette

Kiss A Brunette Day
nae nae

Nae Nae Day
polyamory

Polyamory Day
cuddle up

Cuddle Up Day
first love

First Love Day
pumpkin

Pumpkin Day