You are incorrect.
Mark 15
42 Now when evening had come, because it was the Preparation Day, that is, the day before the Sabbath, 43 Joseph of Arimathea, a prominent council member, who was himself waiting for the kingdom of God, coming and taking courage, went in to Pilate and asked for the body of Jesus. 44 Pilate marveled that He was already dead; and summoning the centurion, he asked him if He had been dead for some time.
John 19
31 Therefore, because it was the Preparation Day, that the bodies should not remain on the cross on the Sabbath, the Jews asked Pilate that their legs might be broken, and that they might be taken away.
Mark 16
He Is Risen
1 Now when the Sabbath was past, Mary Magdalene, Mary the mother of James, and Salome bought spices, that they might come and anoint Him. 2 Very early in the morning, on the first day of the week, they came to the tomb when the sun had risen. 3 And they said among themselves, Who will roll away the stone from the door of the tomb for us? 4 But when they looked up, they saw that the stone had been rolled awayfor it was very large. 5 And entering the tomb, they saw a young man clothed in a long white robe sitting on the right side; and they were alarmed.
6 But he said to them, Do not be alarmed. You seek Jesus of Nazareth, who was crucified. He is risen! He is not here. See the place where they laid Him.
Friday was the Day of Preparation, Saturday the Sabbath, & Sunday the first day of the week. Actually the Sabbath ran from dusk on Friday to dusk on Saturday (I think).