We have thousands of years of cultural accumulation in China, and pay attention to a lot! Be careful what you do, because under the influence of folk metaphysics and Neo-Confucianism, the old people at home think it is unlucky to leave the hospital in the afternoon.
In the afternoon, it means sunset, which symbolizes that the day is coming to an end. You can't give patients in the hospital a feeling that it's over. Therefore, patients have to go to the hospital in the morning, and they are full of energy in the morning, which will make patients full of confidence in their early recovery!
If you don't care about this, then it doesn't matter.