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

Other days

polyamory

Polyamory Day
tulip

Tulip Day
gum

Gum Day
cuddle up

Cuddle Up Day
offer

Offer Day
lash

Lash Day
cat girl

Cat Girl Day
latina equal pay

Latina Equal Pay Day
kale

Kale Day
lisp

Lisp Day