Oops, it doesn't look like 'records for most blood donations in one day' is a national day..

Other days

bonang

Bonang Day
brow

Brow Day
lisp

Lisp Day
martini

Martini Day
blanket fort

Blanket Fort Day
bounce

Bounce Day
nae nae

Nae Nae Day
raise awerness of zeus

Raise Awerness Of Zeus Day
one

One Day
bow tie

Bow Tie Day