high noon
Pronunciation:
noun
Definitions
Exactly noon; midday (when the sun is at its highest)
Example: The same streets that are inviting and quiet at high noon may be intimidating at night.
(idomatic) The zenith or apex of one's life or of a certain activity or plot.
A time, set out in advance, at which an important decision is to be made or a nemesis is to be confronted