The Shadow of Firstfruits episode 4

The Shadow of FirstFruits episode 4
Year after year many Christians look to Good Friday as the memorial of the death of Christ on the cross.With this idea, there are mathematical errors when we add in 3 days and 3 nights in the grave as Jesus said will happen when he dies. Friday to Sunday proposes a 3 day/3 night problem. When would Jesus then have died if we adjust our math?