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

Other days

cat girl

Cat Girl Day
nail polish

Nail Polish Day
ponytail

Ponytail Day
eat what you want

Eat What You Want Day
bounce

Bounce Day
youth

Youth Day
frozen yogurt

Frozen Yogurt Day
hoodie

Hoodie Day
book

Book Day
boy friend

Boy Friend Day