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

Other days

polyamory

Polyamory Day
girl friend

Girl Friend Day
boy friend

Boy Friend Day
nail polish

Nail Polish Day
cursing

Cursing Day
bubble bath

Bubble Bath Day
unicorn

Unicorn Day
martini

Martini Day
coffee

Coffee Day
pick me

Pick Me Day