Two Takes on Good Friday...

Wikipedia:
"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."

God:
"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