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

Other days

slime

Slime Day
kiss a brunette

Kiss A Brunette Day
pumpkin

Pumpkin Day
cat girl

Cat Girl Day
polyamory

Polyamory Day
first love

First Love Day
ride the wind

Ride The Wind Day
bounce

Bounce Day
get funky

Get Funky Day
lumpy rug

Lumpy Rug Day