Two Takes on Good Friday...

"Good Friday, also called Holy Friday, Black Friday, or Great Friday, is a religious holiday observed primarily by adherents to Christianity commemorating the crucifixion of Jesus and his death at Golgotha."

"But he was pierced for our transgressions, he was crushed for our iniquities; the punishment that brought us peace was upon him, and by his wounds we are healed."
(Is 53:5 NIV)

See: Psalm 22 & Isaiah 53