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

Other days

girl friend

Girl Friend Day
cuddle up

Cuddle Up Day
slime

Slime Day
camera

Camera Day
frozen yogurt

Frozen Yogurt Day
ormille

Ormille Day
gum

Gum Day
bow tie

Bow Tie Day
promposal

Promposal Day
kiss a ginger

Kiss A Ginger Day