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

Other days

ask out your crush

Ask Out Your Crush Day
buddy

Buddy Day
camera

Camera Day
kiss a brunette

Kiss A Brunette Day
lisp

Lisp Day
kiss a ginger

Kiss A Ginger Day
offer

Offer Day
tulip

Tulip Day
bubble bath

Bubble Bath Day
youth

Youth Day