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

Other days

boyfriend

Boyfriend Day

eat what you want

Eat What You Want Day

girl friend

Girl Friend Day

cat girl

Cat Girl Day

Me Day

gallery

Gallery Day

polyamory

Polyamory Day

boy friend

Boy Friend Day

pampering

Pampering Day

hannah

Hannah Day