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

Other days

lash

Lash Day
stud

Stud Day
unicorn

Unicorn Day
promposal

Promposal Day
carpenters

Carpenters Day
boy friend

Boy Friend Day
ask out your crush

Ask Out Your Crush Day
youth

Youth Day
nae nae

Nae Nae Day
cuddle up

Cuddle Up Day