Making up the Witr prayer after the midday prayer

Question:
He says: If a person missed the witr and did not remember it until after the midday prayer, is he allowed to make it up?

Answer:
No. Making up the witr is from the rising of the sun until the sun reaches its zenith. Once the sun reaches its zenith, the time for the midday prayer begins, and the time for making up the witr ends, because you have entered the next night, you have entered the evening. But before the zenith, you are still in the morning, continuing from the previous night.