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

Other days

ruby

Ruby Day
hoodie

Hoodie Day
tulip

Tulip Day
first love

First Love Day
azonto is acceptable

Azonto Is Acceptable Day
bonang

Bonang Day
artists

Artists Day
lisp

Lisp Day
carpenters

Carpenters Day
nail polish

Nail Polish Day