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

Other days

first love

First Love Day
stud

Stud Day
prosecco

Prosecco Day
frozen yogurt

Frozen Yogurt Day
boba

Boba Day
girl friend

Girl Friend Day
get funky

Get Funky Day
comfy

Comfy Day
lash

Lash Day
kale

Kale Day