The most important time for an individual is when he is born, which determines the eight characters of his horoscope and is related to the heavenly stems and earthly branches, the animals of the zodiac, the five elements, and other theories.
個人時間中，最重要、也是天生註定的，首推「生辰」﹘﹘用年、月、日、天干、地支等觀念，配以生肖、季節、五行、星象等學說，排出一個人的「生辰八字」。