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

Other days

bubble bath

Bubble Bath Day
cat girl

Cat Girl Day
cuddle up

Cuddle Up Day
ask out your crush

Ask Out Your Crush Day
book

Book Day
boyfriend

Boyfriend Day
tulip

Tulip Day
slime

Slime Day
ruby

Ruby Day
kiss a ginger

Kiss A Ginger Day