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

Other days

law

Law Day
mean girls

Mean Girls Day
lumpy rug

Lumpy Rug Day
promposal

Promposal Day
stud

Stud Day
buddy

Buddy Day
artists

Artists Day
nae nae

Nae Nae Day
hiv awareness

Hiv Awareness Day
cuddle up

Cuddle Up Day