When we consider the details in all four Gospel accounts, the picture is clear. Jesus was crucified and entombed late on Wednesday afternoon, just before a Sabbath began at sunset. However, that was a high-day Sabbath, lasting from Wednesday sunset to Thursday sunset that week, rather than the regular weekly Sabbath that lasted from Friday sunset to Saturday sunset.
Since Jesus was entombed in the late afternoon just before sundown, according to His own words He would have been resurrected at around the same time three days and nights later. He remained in the tomb from Wednesday at sunset until Saturday at sunset, when He rose from the dead. While no one witnessed His resurrection (which took place inside a sealed tomb), to fit His words and the biblical evidence it had to have happened three days and three nights later, near sunset on Saturday.
This time line perfectly accommodates three full nights (Wednesday night, Thursday night and Friday night) and three full daylight periods (Thursday, Friday and Saturday). This is the only time that fits Jesus’ own prophecy of how long He would be in the tomb. And it fits perfectly with all the details recorded in the Gospels.