What Was the Sign of Jonah

Is it possible that for the past two thousand years the whole Christian world celebrated 'Good Friday' instead of 'Good Wednesday'?. Are 1,200,000,000 Christians of the world ignorant of the correct day of the so called crucifixion of Jesus Christ (PBUH)? In this very brief but important book, South African author Ahmed Deedat analyzes the miracles of Jonah. He goes back to the Old Testament and compares Jonah's situation with that of Jesus. He uses Jonah's situation in the belly of the whale for three days to explain how Jesus must not have been entombed dead in the sepulcher for the same amount of time, as he is more important than Jonah himself. In only a few pages, he provides a brief but compelling discussion over Jonah and the correlation to Jesus.