Concept
Heavenly Stems
Overview
The ten Heavenly Stems (or Celestial Stems) are a system of ordinals indigenous to China and used throughout East Asia, first attested c. 1250 BCE during the Shang dynasty as the names of the ten days of the week. They were also used in Shang-era rituals in the names of dead family members, who were offered sacrifices on the corresponding day of the Shang week. Stems are no longer used as names for the days of the week, but have acquired many other uses. Most prominently, they have been used in conjunction with the associated set of twelve Earthly Branches in the compound sexagenary cycle, an important feature of historical Chinese calendars.
Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).
Possible passages
Found by search and not yet checked by a person; they may only mention the idea in passing.
And God lighted a fire in the second orbit from the earth which is called the sun, to give light over the whole heaven, and to teach intelligent beings that knowledge of number which is derived from the revolution of the same. Thus arose day and night, which are the periods of the most intelligent nature; a month is created by the revolution of the moon, a year by that of the sun. Other periods of wonderful length…
Plato, Timaeus
States what Heavenly Stems is.
Thus Damascene (De Fide Orth. ii) holds as one heaven all the space between the waters and the moon's orb, calling it the aerial. According to him, then, there are three heavens, the aerial, the starry, and one higher than both these, of which the Apostle is understood to speak when he says of himself that he was "rapt to the third heaven." But since this space contains two elements, namely, fire and air, and in…
Aquinas Thomas, Summa Theologica, Part I
States what Heavenly Stems is.
Again, among the twelve signs, six are called masculine and diurnal, and six feminine and nocturnal. They are arranged in alternate order, one after the other, as the day is followed by the night, and as the male is coupled with the female. The commencement, it has been already said, belongs to Aries; since the moisture of the spring forms an introduction for the other seasons.
Ptolemy, Ptolemy's Tetrabiblos
States what Heavenly Stems is.
Related ideas
Place in the tradition
Part of Chinese philosophy.