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A carpenter in Fujian once told us he would not cut a single plank without first consulting the Tong Shu. The calendar, he said, knew when the wood’s Qi was aligned with his own. The Ten Thousand Year Calendar (Wàn Nián Lì, also called Tong Shu or Huang Li) is the feng shui practitioner’s primary tool for date selection (Zé Rì). It is a lunisolar almanac that combines astronomical calculations with the Five Elements, Yin-Yang, and the 60-year Jiazi cycle. To read it, you must understand its five key components: the Heavenly Stems, Earthly Branches, the 28 Mansions, the day’s auspicious and inauspicious activities, and the flying star influences.

What the Tong Shu Actually Is

What the Tong Shu Actually Is

The calendar is not a book of predictions. It is a map of energy. Every day carries a unique signature of Qi, and the Tong Shu tells you whether that Qi supports or opposes the action you plan to take. We keep a printed copy on our desk, its pages marked with red ink for the days when the Earth’s Qi is stable enough to move a bed or install a door. The following sections explain how to read it, what its symbols mean, and where its authority comes from.

History of the Ten Thousand Year Calendar

History of the Ten Thousand Year Calendar

The Ten Thousand Year Calendar — the Wan Nian Li — is the traditional Chinese almanac, and its history reaches back to the earliest Chinese calendars. The calendar is not a book of predictions but a map of energy: it records the stems and the branches of each day, the phases of the moon, the solar terms, and the favorable and the unfavorable activities of the day. The calendar was maintained by the imperial astronomers and published for the people, and its rhythms — the farming, the festivals, the ceremonies — structured the Chinese year. The Ten Thousand Year Calendar is the daily face of the Chinese astrology.

The Historical Origins of the Ten Thousand Year Calendar

The calendar’s origins are attributed to the Yellow Emperor (Huangdi) in the 3rd millennium BCE, but the first known printed version appeared during the Tang dynasty (618–907 CE). The name “Ten Thousand Year” comes from the Ming dynasty (1368–1644), when the court published a perpetual almanac that was supposed to last for ten thousand years—a metaphor for imperial longevity.

In 1644, the Qing dynasty adopted a version reformed by the Jesuit missionary Adam Schall von Bell, who integrated Western astronomical calculations into the traditional Chinese system. Schall’s calendar, called the Shí Xiàn Lì (Seasonal Calendar), became the official almanac of the Qing court and the basis for most modern Tong Shu editions. The calendar was banned during the Cultural Revolution (1966–1976) as a “feudal superstition,” but it continued in diaspora communities in Hong Kong, Taiwan, and overseas Chinese enclaves.

How the Calendar Was Used in Daily Life

For ordinary households, the calendar dictated the rhythm of life. Weddings, funerals, groundbreaking, and even haircuts were scheduled according to its pages. A wrong date could bring misfortune, so families kept multiple copies and compared them. The human consequence was a deep trust in the calendar’s authority: a day marked “inauspicious for burial” meant the body stayed in the home until a better date arrived, no matter how long the wait.

Symbolism and Meaning: What the Calendar Actually Represents

The calendar represents the order of the energy in time. Each day carries its stems and its branches — the elemental nature of the day — and the calendar maps the daily movement of the five elements through the cycle of the year. The symbolism is practical: the day of the Wood favors the planting and the beginning; the day of the Metal favors the cutting and the finishing; the day of the Water favors the washing and the journey. For ordinary households, the calendar dictated the rhythm of the life — the day to marry, the day to move, the day to begin the work — and the tradition reads the calendar as the map of the auspicious and the inauspicious.

The Cosmological Structure of the Calendar

The calendar is a microcosm of the universe’s energy flow. Each day is assigned a unique combination of one of the Ten Heavenly Stems (Tiān Gān) and one of the Twelve Earthly Branches (Dì Zhī). These combine to form a 60-day cycle that mirrors the 60-year Jiazi cycle. The stem determines the day’s elemental nature (Wood, Fire, Earth, Metal, Water), while the branch associates it with a zodiac animal and a directional influence.

The 28 Mansions (Xiù) divide the sky into lunar lodges, each associated with a direction, an animal, and a quality. For example, the Mansion of the Horn (Jiǎo) belongs to Wood and the east, making it favorable for planting or starting a business. In feng shui, the mansion of the day indicates the quality of Qi for directional activities. If you plan to face a certain direction, you check whether the day’s mansion supports that direction.

The calendar also includes the Day Officer (Zhi) and Hour Officer for finer timing. Each two-hour period has its own stem-branch pair, and the same rules apply. A practitioner may choose not just the right day but the right hour for a ritual or construction.

How to Read a Tong Shu Entry

Open the calendar to a given date. You will see several columns. Here is what each one tells you:

  • Date and stem-branch pair (e.g., Jiǎ Zǐ). This is the day’s identity. Write it down.
  • Element of the day. Derived from the stem. A Jiǎ day is Wood, a Bǐng day is Fire, and so on.
  • Auspicious activities. A list of actions the day supports. Common entries include “Open Market,” “Break Ground,” “Move Bed,” “Sacrifice,” “Wedding,” “Travel.”
  • Inauspicious activities. Actions to avoid. If your intended activity appears here, choose another day.
  • 28 Mansions. The lunar lodge for that day. Check its element and direction.
  • Flying star numbers (sometimes included). These are the annual and monthly stars that affect the day’s Qi.

How to Choose an Auspicious Date Using the Calendar

Step one: Check the day’s element against your own Bazi (Four Pillars of Destiny). If the day’s element is destructive to your personal element (e.g., a Metal day for a Wood person), avoid major actions. If it is supportive or neutral, proceed.

Step two: Look at the “Auspicious Activities” column. If your intended action is listed, the day is favorable. If it is not listed but also not in the “Inauspicious” column, the day is neutral. If your action appears under “Inauspicious,” do not proceed.

Step three: Note the Three Killings (Sān Shā) direction for that day. The Three Killings are a set of three directions that bring conflict, violence, and loss. Never face or move toward these directions on that day. The calendar usually marks them with a symbol or text.

Step four: If you need finer timing, consult the hourly columns. Each two-hour period has its own stem-branch and element. Apply the same compatibility check.

We light a stick of incense when we open the calendar. It is a small gesture, but it reminds us that we are reading a document that connects us to the sky. The calendar is not a checklist. It is a conversation with the Qi of the day.

The Tong Shu Compared to Other Astrological Calendars

The Ten Thousand Year Calendar is the Chinese equivalent of the Indian Panchanga, used for electional astrology (Muhurta). Both select auspicious moments based on lunar phases and planetary positions. But the Chinese calendar places greater emphasis on the interaction of the Five Elements and the 28 Mansions, while the Panchanga focuses on the Nakshatras (lunar mansions) and Tithis (lunar days). The Chinese system is also more concerned with directional taboos like the Three Killings and the Year Breaker (Suì Pò).

The feng shui compass (Luopan) uses the same Heavenly Stems and Earthly Branches but for spatial orientation, not time. A practitioner often cross-references the calendar with the compass to ensure both time and space are aligned. For example, you might choose a day whose element supports your goal, then use the compass to find an auspicious direction for that day.

The Western tradition of electional astrology (e.g., choosing a wedding date by Venus and Jupiter aspects) operates on similar principles but uses a different set of symbols. The Tong Shu is more practical: it gives you a direct list of activities rather than a set of planetary aspects you must interpret yourself.

“The calendar predicts your luck.” It does not. It tells you whether the Qi of a given day supports a specific action. A day marked “auspicious for travel” does not guarantee a safe trip; it means the energy of that day aligns with the act of moving. You still need to drive carefully.

“All Tong Shu editions are the same.” They are not. Different publishers (Hong Kong vs. Taiwan vs. mainland) may disagree on a day’s auspices due to different computational methods or lineage traditions. The most respected version is the one based on the Qing dynasty’s Shí Xiàn Lì, but even that has variants. We keep three editions and compare them when the stakes are high.

“You can use the calendar without knowing your Bazi.” You can, but you will miss half the information. The calendar is a general guide; your personal element determines whether a day’s energy is actually good for you. A day that is auspicious for a Fire person may be disastrous for a Water person.

“The calendar is fixed for all time zones.” It is not. The stems and branches are based on the solar time of the 120°E meridian (Beijing time). If you live in a different longitude, you must adjust the hour columns. Some apps do this automatically; printed calendars usually assume Beijing time.

FAQ

Do I need to read the Ten Thousand Year Calendar every day?
No, only when planning a significant action: a move, a wedding, a renovation, a ritual. Many practitioners check it weekly for the coming days.

Can I use a digital app instead of a printed calendar?
Yes, but ensure the app uses the correct calculations and updates for your time zone. We prefer the printed version for its tactile reference and because it often includes annotations from the publisher’s lineage.

What if the calendar says a day is inauspicious for everything?
Then do nothing major. It is a day for rest, meditation, or routine tasks. The Qi is simply not cooperative.

How do I find my personal auspicious direction using the calendar?
Combine the day’s stem-branch with your Bazi to find the direction of the “Heavenly Doctor” (Tiān Yī) or “Life-Giving Qi.” This requires deeper study of the 28 Mansions and the flying star system. A simpler method: avoid the Three Killings direction and the direction opposite your birth year animal.

The Ten Thousand Year Calendar is one tool among many in the feng shui practitioner’s library. For a deeper understanding of the stems and branches that form its backbone, explore our guide to the Heavenly Stems and Earthly Branches. The calendar’s wisdom is not in its predictions but in its invitation to align with the rhythm of the cosmos. See our full collection of Chinese astrology guides and learn how the Tong Shu fits into the larger system of Bazi Four Pillars.