We break for lunch at midday.
No the word "midday" is not hyphenated.
At midday, the azure sky is often too bright to look at directly.
A nice bowl of soup will suffice for my midday meal. The bandits are supposed to meet at their den tomorrow at midday.
Right around midday the temperature got a lot warmer.
Yes, "midday" is typically not capitalized unless it appears at the beginning of a sentence.
Yes I certainly can make a sentence with that word.
The word "midday" is a noun. It refers to the middle of the day, typically considered as the time around noon.
afternoon
afternoon
afternoon
Noon