When you are seven years old, your father's physical condition can help you judge your time.
If your father is in poor health, then you are after 7 o'clock; If nothing had happened to your father, you would have been born before 7 o'clock.
That year, your mother was in poor health. Or tired or hurt. If you are tired, it is after 7 o'clock; If you are injured, you were born before 7 o'clock.
In addition, after reading your understanding of the eight characters, I feel very in place. Very smart. You can look at Mr. Li Hanchen's new numerology, which will enlighten you.