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

Other days

buddy

Buddy Day
gallery

Gallery Day
brow

Brow Day
boyfriend

Boyfriend Day
lumpy rug

Lumpy Rug Day
get funky

Get Funky Day
bubble bath

Bubble Bath Day
ride the wind

Ride The Wind Day
stud

Stud Day
hoodie

Hoodie Day