'O'clock' in the Bible

In spite of what you think, these men are not drunk, for it is only nine o'clock in the morning.

Now Peter and John were going up to the temple at the time for prayer, at three o'clock in the afternoon.

About three o'clock one afternoon he saw clearly in a vision an angel of God who came in and said to him, "Cornelius."

Cornelius replied, "Four days ago at this very hour, at three o'clock in the afternoon, I was praying in my house, and suddenly a man in shining clothing stood before me

Then he summoned two of the centurions and said, "Make ready two hundred soldiers to go to Caesarea along with seventy horsemen and two hundred spearmen by nine o'clock tonight,