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

Other days

hoodie

Hoodie Day
bounce

Bounce Day
lisp

Lisp Day
prescription drug take back

Prescription Drug Take Back Day
boy friend

Boy Friend Day
one

One Day
blanket fort

Blanket Fort Day
stud

Stud Day
brow

Brow Day
lash

Lash Day