I have heard it said many times that Jesus could not have been crucified on a Friday particularly if He was resurrected on the following Sunday. The following scripture is often quoted in support of this claim.
Matthew 12:40 (KJV) For as Jonas was three days and three nights in the whale’s belly; so shall the Son of man be three days and three nights in the heart of the earth.
The logic is that if we count three full 24 hour day/night cycles, and given that He rose on a Sunday morning, He would have to have had died on the Thursday morning prior. Remember the Jewish counting of a 24-hour day starts at sundown and ends at the following sundown. That means that a Friday (the Preparation Day for the weekly Sabbath) starts at sundown Thursday and ends at sundown Friday when the Sabbath begins.