Oops, it doesn't look like 'Blood Donor Week And You Can Help By Taking Just An Hour From Your day' is a national day..

Other days

Lost Sock Memorial Day

Stud Day

Nae Nae Day

Tell Ur Crush You Like Them Day

Ride The Wind Day

Coffee Day

Promposal Day

Chocolate Milkshake Day

Cat Girl Day

Slime Day