The Day Master in BaZi: What the Day Stem Is

Of the eight characters in a BaZi chart, one is more important than all the others: the Heavenly Stem of the day of birth. It is called the Day Master. It describes the person themselves, and all the other characters in the chart are read only in relation to it. Let’s look at how to find your Day Master and what it says about your character.

How to find your Day Master

Generate your chart in the BaZi calculator and look at the Day Pillar. The top character of this pillar is your Day Master. For example, John Travolta, born on February 18, 1954, has the Day Pillar 乙巳, so his Day Master is 乙, Yin Wood.

In the Chinese original, this character is called 日主 (rì zhǔ), literally “lord of the day” or “master of the day.” Russian-language books use other translations as well, such as “day dominant” and “lord of the day.” We use “Day Master” because it makes the idea easier to understand.

Ten types: five elements, Yin and Yang

There are five elements, and each can be Yang or Yin. This gives ten Heavenly Stems and, therefore, ten types of Day Master.

Stem	Element	Natural image
甲	Yang Wood	a big tree, trunk and roots
乙	Yin Wood	grass, flowers, vines
丙	Yang Fire	the sun
丁	Yin Fire	a candle, a campfire, the warmth of embers
戊	Yang Earth	a mountain, a cliff
己	Yin Earth	fertile garden soil
庚	Yang Metal	ore, steel, a blade
辛	Yin Metal	precious metal, jewelry
壬	Yang Water	a river, the sea
癸	Yin Water	dew, rain, mist

 

A Yang Stem is usually more direct, firmer, and more noticeable. A Yin Stem is more flexible, subtler, and more often acts indirectly. For more on the character of each Stem, see the article “The 10 Heavenly Stems in BaZi.”

Why everything is built around the Day Master

The other seven characters in the chart mean nothing on their own. Metal in a chart may represent authority for one person, money for another, and friends for a third. It all depends on the person’s Day Master.

Relationship to the Day Master	Area of life
the same element	Friends, colleagues, rivals
the Day Master generates it	Output
the Day Master controls it	Wealth, money
it controls the Day Master	Power
it generates the Day Master	Resources

 

Polarity also matters. For example, for Yang Wood, Yin Earth represents steady income, while Yang Earth represents unexpected, riskier money. In this way, the five areas become the ten BaZi Gods, which we will cover separately (see the section “The Ten Gods of BaZi”).

The Day Master and the strength of the chart

Knowing your Day Master is only the beginning. It also matters how strong it is. Yin Wood born in spring, when vegetation is at full strength, and Yin Wood born in late autumn are very different people. The strength of the Day Master determines which elements are useful to it and which are harmful. This is covered in the article on the strength of a BaZi chart.

For example, John Travolta was born on a Yin Wood 乙 day in the Month of the Tiger 寅, at the beginning of spring, in the very season of Wood. His chart also contains Yang Wood 甲 in the Year Pillar and Water 癸 in the Hour Pillar, which nourishes Wood. This is no longer a fragile flower, but a spring plant full of vitality.

The Day Master and personal day stars

The Day Pillar also plays a role in choosing dates. If a calendar day clashes with your Day Pillar, that day is less fortunate for you personally, even if it is good according to the general calendar. That is why dates on the site are checked against your BaZi chart. Look up your personal stars by date of birth, or open the Personal Calendar, where this is already taken into account.

Frequently asked questions

Is the Day Master the same as the zodiac animal of the year?

No. The year animal is the Earthly Branch of the year. The Day Master is the Heavenly Stem of the day. These are completely different characters in the chart.

My chart has no element like my Day Master except the Day Stem itself. Is that bad?

It means the Day Master has little support and may well be weak. It can also mean that you feel comfortable on your own and rely on your own strength in life rather than on friends and colleagues. Whether this is good or bad depends on the whole chart, how balanced it is, and your Luck Pillars.

Can the Day Master change during a person’s life?

No, it is fixed at birth. The Luck Pillars change, and with them the environment surrounding the Day Master changes.