Why is orphan Sunday a big deal? Because of these two. 

And all of the other estimated 160,000,000 orphans world wide. 

Because every child deserves to be told they are loved. Cherished. Wanted. Needed. Worthy. They deserve a chance to blossom, flourish, grow. Why is the orphan crisis part of the Christian responsibility? Because God says so. And who are we to tell Him no?