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

Other days

bounce

Bounce Day
frozen yogurt

Frozen Yogurt Day
get funky

Get Funky Day
lost sock memorial

Lost Sock Memorial Day
bow tie

Bow Tie Day
one

One Day
china

China Day
youth

Youth Day
blanket fort

Blanket Fort Day
law

Law Day