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

Other days

hannah

Hannah Day
carpenters

Carpenters Day
my little pony

My Little Pony Day
lash

Lash Day
kiss a brunette

Kiss A Brunette Day
bounce

Bounce Day
nae nae

Nae Nae Day
bonang

Bonang Day
kale

Kale Day
self care

Self Care Day