The “noon hour” has shifted several times throughout history, and at one time, when Christians prayed twice a day, it meant both midday and midnight.
In the original Old English the noon hour was the hour for prayers, which at the time was the ninth hour of daylight, or three o’clock in the afternoon.
The singular prayer time, or noon hour, changed to midday, or twelve o’clock, during the Middle Ages in Britain.
The term stuck and we still call midday the “noon hour”.
