My mother is going to Anqing for surgery, and I am alone at home. The blind date told me that I had to give him a birthday today. His family must choose a date for his birthday, and he knows it.

Of course not! If he does this when he knows that your mother is ill, this person has a bad personality. Normal people will ask aunt how she is and whether it matters. Or let you relax, don't worry too much. In fact, wanting a birthday, although it is only a small matter for him, is enough to show that he is not very reliable.