It may seems strange to call the day Jesus was crucified "Good". When you think about it, Jesus was betrayed by one of His own Disciples, Judas Iscariot the night before (Maundy Thursday). He was arrested, tried before the Sanhedrin in a kangaroo court of false witnesses and blind ignorance. He was handed over to Pontius Pilate (the Roman Authorities). Our Creed succinctly says Jesus "suffered under Pontius Pilate, was crucified, dead and buried". What could possibly be "good" about Good Friday?
There is much we could say in answer to that question! I will take you to Jesus' own Words to Pilate when he asked Jesus, "Are you a King then"? -John 18:37 Jesus answered, "You say rightly that I am a king. For this cause (this reason, the why of Good Friday) I was born and for this cause I have come into the world, that I should bear witness to the truth. Everyone who is of the truth hears My voice". Of course this is where Pilate gives his infamous reply, "What is truth"? Pilate (despite his education, intellect, authority, power and position), like so many others, did not see Jesus for who He truly is. SO who is Jesus, you may ask? Jesus, in one of his great truth claims regarding Himself said, "I am the way, the truth, and the life. No one comes to the Father, except through me". - John 14:6 That's a pretty exclusive statement, no? But here's the thing about absolute truth... by virtue of it's ultimate and universal reality, it must (and does) exclude any contradictions or claims to the contrary! YES... Jesus is who He claims to be- the Messiah, the Christ, the Savior of the World, the eternal Son of God.
So on Good Friday, Jesus fulfilled His destiny by accomplishing the will of His Father "for this cause". What was the cause? “He himself bore our sins in his body on the cross, so that we might die to sins and live for righteousness; “by his wounds you have been healed.”- I Peter 2:24 He died for the sins of all His people! He died for those who were near (the Jews) and those who were fall off (the Gentiles). He did, what only He could do. He laid down His life as a ransom for many (Mark 10:45), and healed us from the most prevalent and serious malady of mankind, "sin". And that is some very good news, about what happened on Good Friday!