In the Hebrew Bible (Old Testament), there are many specific blood sacrifices listed and each one was a covering over the particular sin or sins, an atonement. This is why the sacrifices had to be repeated, and this is why there is the annual Jewish holiday, Yom Kippur, the day of Atonement.
In the New Testament, at the very central heart of the gospel is that the saving death of Jesus is the final atonement, for it is the propitiation: the quenching of God’s wrath for us when He completely removed our sins and took them onto Himself (expiation) thereby reconciling those who believe to God forever!
Our sin (ALL of our sin, our entire body of sin; past, present, future) was imputed onto Jesus, and the righteousness of Jesus was imputed onto us, therefore called double imputation (Romans 3:21-26, 1 John 2:2).
Good Friday is the recognition of just what happened in His death. Although, it does not end there. It is Friday, but Sunday is coming; Resurrection Sunday (Easter)!
Good Friday Dates: April 7, 2023, March 29, 2024, April 18, 2025, April 3, 2026.