Oops, it doesn't look like 'surprise urine test day' is a national day..

Other days

bounce

Bounce Day
gallery

Gallery Day
cuddle up

Cuddle Up Day
donate your hair

Donate Your Hair Day
slime

Slime Day
bubble bath

Bubble Bath Day
believe

Believe Day
lisp

Lisp Day
bonang

Bonang Day
ruby

Ruby Day