How to calculate the time in the date of birth for children born in the United States?

The years, months and days of trunks and branches are cyclical. If nothing else, as far as time is concerned, it is based on natural time. Suppose you were born in the United States at noon, when the fire was flourishing, and the sun was shining in essence. If it was time in China, it might become night. If it was childhood, it would be time for water to flourish. You were born at noon, and the five elements belong to fire, but the water is not completely abnormal. How is that possible? So we should use the natural tense, and of course we should also use the American tense for Japan. It's unreasonable to switch to China.