Instant you can no longer say ‘good morning’

noun

1. Midday
2. Midnight
3. The highest point

noun

1. Precisely noon
2. The most advanced, flourishing, or creative stage or period

   "the high noon of her career"

3. The time of a decisive confrontation or contest

idiom

1. During all times of the day all the time

   "The system is operating morning, noon, and night."

adjective

1. Existing or occurring before noon

   "the prenoon hours"

idiom

1. Used to describe someone as quick to understand things and not easily fooled

idiom

1. Not something that causes people to disapprove of (someone)

   "You're not to blame for these problems. They're no reflection on you."