Why "Good Friday?"

Why do we refer to the day commemorating the death of Jesus as Good Friday? One would think the rejection and execution of the Son of God would be refereed to as Black Friday. Why did he have to die anyway?

The whole of the Bible, both old and new testaments are the account of man's separation from God through sin, and God's effort to reconcile man back to Him. In the very beginning in the garden of Eden the plan is laid out.

So the LORD God said to the serpent,... And I will put enmity between you and the woman, and between your offspring [a] and hers; he will crush [b] your head, and you will strike his heel." ...To Adam he said, "Because you listened to your wife and ate from the tree about which I commanded you, 'You must not eat of it,' "Cursed is the ground because of you through painful toil you will eat of it all the days of your life. ... The LORD God made garments of skin for Adam and his wife and clothed them. Genesis 3

This is the synopsis of what the rest of the work is about. Adam's choice caused God to end the innocence of creation. The serpent's (Satan) assault on man will continue with some success only to be defeated by the child of a woman (the incarnation). The covering for the nakedness of transgression against God is blood sacrifice (the animal skins used to make clothing). later we have the clear symbol of how that sacrifice will be made in the account of Isaac.

"Then God said, 'Take your son, your only son, Isaac, whom you love, and go to the region of Moriah. Sacrifice him there as a burnt offering on one of the mountains I will tell you about.'"
-Genesis 21:2

This is God demonstrating to and through his follower Abraham how he is going to redeem the world. The sacrifice of Abraham's son interrupted by God so a surrogate could take his place is clearly pointing to Jesus and the intervening sacrificial system leading up to his birth. Jesus comes to live as our example and teacher. Having fulfilled the law in all aspects without blame then willingly accepts the death on the cross offering it as payment for our failure to live according to the law. Before he dies he says" It is finished." The way of redemption was opened by his death. Tragic that God's own Son had to die so we could have peace with God, but the good news of salvation was paid for on Good Friday. But what about the resurrection?

I'll save that for Easter.