Scripture clearly predicted in Matthew 12:40 "For as Jonah was three days and three nights in the heart of the earth, so the Son of Man will be three days and three nights in the heart of the earth" (cf. Jonah 1:17). But if our Lord was crucified on "Good Friday," that would not leave 72 hours (24 hrs. x 3 days and nights =72), but instead probably something more like 38 hours for our Lord to be in the tomb (Friday afternoon til midnight, 7-9 hours + Saturday 24 hrs. + four or five hours on Easter Sunday morning = 36-38 hours total. That certainly does not equal three full days and three full nights of 72 hours.
Have you ever wondered how it works out to three days, when the chronology of Jesus' death and resurrection–Friday afternoon to the early hours of Sunday morning–only takes 36 hours or so?