'O'clock' in the Bible

"Men of Judea and everyone living in Jerusalem! You must understand something, so pay close attention to my words. These men are not drunk as you suppose, for it's only nine o'clock in the morning.

One afternoon, Peter and John were on their way to the Temple for the three o'clock prayer time.

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, three o'clock in the afternoon, I was praying in my home. All at once a man in radiant clothes stood in front of me

But when some were becoming hardened and disobedient [to the word of God], discrediting and speaking evil of the Way (Jesus, Christianity) before the congregation, Paul left them, taking the disciples with him, and went on holding daily discussions in the lecture hall of Tyrannus [instead of in the synagogue].

Then he summoned two centurions and ordered, "Get 200 soldiers ready to leave for Caesarea at nine o'clock tonight, along with 70 mounted soldiers and 200 soldiers with spears.