There is one scriptural account of what happened on Holy Saturday and you can read that in Matthew 27:62-66
Matthew 27:62-66 Common English Bible (CEB)
Guard at the tomb
62 The next day, which was the day after Preparation Day, the chief priests and the Pharisees gathered before Pilate. 63 They said, “Sir, we remember that while that deceiver was still alive he said, ‘After three days I will arise.’ 64 Therefore, order the grave to be sealed until the third day. Otherwise, his disciples may come and steal the body and tell the people, ‘He’s been raised from the dead.’ This last deception will be worse than the first.”
65 Pilate replied, “You have soldiers for guard duty. Go and make it as secure as you know how.” 66 Then they went and secured the tomb by sealing the stone and posting the guard.
It is ironic that while Jesus’ enemies remember his words predicting his resurrection from the dead (and assume that his disciples will remember these words as well and as a result will try to steal his body from its tomb and falsely prove the resurrection) Jesus’ disciples do not. The disciples are noticeably absent in the Scriptures on Holy Saturday. Later we learn that they spend this day in total fear locked in the upper room awaiting their own arrests and deaths.
Still no peace today +++