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

Other days

get funky

Get Funky Day
unicorn

Unicorn Day
stud

Stud Day
self care

Self Care Day
ask out your crush

Ask Out Your Crush Day
gallery

Gallery Day
nae nae

Nae Nae Day
one

One Day
bonang

Bonang Day
gum

Gum Day