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

Other days

promposal

Promposal Day
lisp

Lisp Day
hot chocolate

Hot Chocolate Day
kiss a ginger

Kiss A Ginger Day
martini

Martini Day
comfy

Comfy Day
kiss a brunette

Kiss A Brunette Day
boba

Boba Day
blanket fort

Blanket Fort Day
boy friend

Boy Friend Day