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

Other days

lumpy rug

Lumpy Rug Day
gum

Gum Day
bounce

Bounce Day
slime

Slime Day
boy friend

Boy Friend Day
blanket fort

Blanket Fort Day
polyamory

Polyamory Day
gallery

Gallery Day
ruby

Ruby Day
carpenters

Carpenters Day