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

Other days

hannah

Hannah Day
stud

Stud Day
boba

Boba Day
nail polish

Nail Polish Day
ponytail

Ponytail Day
get funky

Get Funky Day
law

Law Day
nae nae

Nae Nae Day
bonang

Bonang Day
carpenters

Carpenters Day