i Register
In some senses, noonday is marked as figuratively. Watch for register when choosing this word.
noun
The time of noon; the time of day when the sun is highest in the sky, especially on a hot day.
She should not walk, he said, through the dust and heat of the noonday; Nay, she should ride like a queen, not plod along like a peasant.
The time of greatest prosperity.