In many Chinese families, a wedding date isn't chosen from whichever Saturday the venue has free. It starts with the couple's birth details, the Tong Shu (the Chinese astrology calendar) and sometimes a phone call to a trusted master. The same goes for naming a baby, opening a shop or moving into a new home.
What sits underneath all of it is BaZi, the Chinese birth chart. It's more than a thousand years old, and it's still part of everyday life for millions of people across China, Hong Kong, Taiwan, Singapore, Malaysia and Chinese communities around the world, including here in Australia.
Here's what BaZi is, where it came from and why it still matters today.
What does BaZi mean?
BaZi (八字) means "eight characters". In English it's often called the Four Pillars of Destiny, or simply the Four Pillars.
Your chart is built from the moment you were born, written as four pillars: the year, month, day and hour. Each pillar has two characters, a Heavenly Stem on top and an Earthly Branch below, which makes eight. Every one of those characters belongs to one of the five elements: Wood, Fire, Earth, Metal and Water.
You can find the characters and elements that make up your own Heavenly Stems and Earthly Branches with our free Five Element birth chart calculator.
In Chinese, the phrase 生辰八字 (shēngchén bāzì) is simply how you'd ask for someone's exact birth date and time. Ask a Chinese grandmother for "your eight characters" and she'll know exactly what you mean.
A counting system more than 3,000 years old
The characters in a BaZi chart come from one of the oldest counting systems in the world. Ten Heavenly Stems and twelve Earthly Branches pair up to make a cycle of 60, and that cycle has been used to name days in China since at least the Shang dynasty. Day names written this way appear on oracle bones carved more than 3,000 years ago.
Some examples:
- 8 November 2026 is a 乙酉 (Yi You) day: Yin Wood over the Rooster.
- 9 November 2026 is 丙戌 (Bing Xu), and 10 November is 丁亥 (Ding Hai).
- Day 1 of the cycle is 甲子 (Jia Zi), and day 60 is 癸亥 (Gui Hai).
The count has run continuously for thousands of years, so any date can be named. That's where the Day pillar in a BaZi chart comes from: it's simply the name of the day you were born. For someone born on 8 November 2026, the Heavenly Stem 乙 would be their Master Element, which is Yin Wood.
The same cycle still names the years today. 2026 is a 丙午 (Bing Wu) year, a Fire Horse, and the last one was 1966. Read more about the significance of a Fire Horse year.
Who created BaZi?
BaZi grew over centuries, but two names stand out.
Li Xuzhong, an official of the Tang dynasty, read a person's fortune from the year, month and day they were born, using three pillars. Then in the 10th century Xu Ziping added the hour as the fourth pillar and placed the day of birth at the centre of the reading. That's the method still used today, and it's why BaZi is also known in China as 子平 (Ziping) astrology, after him.
The day of birth matters most because of its Heavenly Stem. It's your Master Element, the element that represents you, and every other part of your chart is read in relation to it.
The five elements, and why balance matters
The five elements aren't read on their own. Each one feeds another, or tempers another:
- Wood feeds Fire, and Fire leaves ash that becomes Earth
- Earth holds Metal, Metal gathers Water, and Water nourishes Wood
- Water puts out Fire, Fire melts Metal, Metal cuts Wood, Wood breaks up Earth and Earth contains Water
In the BaZi tradition, a balance of the five elements is believed to keep life in harmony. Most charts lean one way or another, because no one is perfect. A reading looks at which element would bring yours back towards the middle. We call that your balancing element. If you'd like to see how a chart is read in detail, our guide on how to read your Five Element birth chart walks through every part.
Fun facts about BaZi
- There are 518,400 possible BaZi charts. That's 60 years × 12 months × 60 days × 12 hours, which is why two people born on the same day can still have different charts.
- Your zodiac animal may not be the one you think. The BaZi year begins at the start of spring (立春, Lichun) on 3, 4 or 5 February, not at Lunar New Year. Anyone born between 21 January and 20 February could find their animal is different from the one on a popular zodiac chart.
- The Chinese day starts at 11 pm. The hours are counted in twelve two-hour periods, each named after a zodiac animal, and the first, the Rat hour, runs from 11 pm to 1 am.
- Your BaZi hour isn't the clock hour. It's read from the sun's position where you were born, which can be up to an hour away from the clock.
- A chart has seasons of its own. Alongside the four pillars, BaZi reads ten-year "luck pillars" (大运, dàyùn), changing periods that a reading looks at for timing in life.
- The year you're born can shape a whole generation. Births have been seen to rise in Dragon years in Chinese communities from Taiwan to Singapore, as families hoped for a Dragon child.
How BaZi is still used today
Matchmaking and marriage
In a traditional Chinese engagement, one of the first steps was exchanging birth details. The man's family would send his eight characters, written on red paper, to the woman's family, who would compare the two charts. This was called 合八字 (hé bāzì), "matching the eight characters". In some regions the paper was placed on the family altar for three days, and if nothing unlucky happened in the house, the match could go ahead.
Many couples still have their charts compared today, sometimes out of real belief and often to put a parent or grandparent at ease.
Choosing an auspicious wedding date
Choosing a good date is a practice of its own, called 择日 (zé rì). For weddings, auspicious times and every major life event, families turn to the Tong Shu (通书), also known as the Tung Shing (通胜), or simply the Huangli (黄历), the "Yellow Calendar". It's built on the maths of the Nongli (农历), the traditional lunisolar calendar, and it's still published every year and sold in Hong Kong, Singapore and Malaysia. The Tong Shu marks which days suit a wedding, a move or a new venture, and many families then check the shortlist against the couple's charts. On the most popular dates, wedding venues in some cities book out more than a year ahead.
Naming a baby
A Chinese name is often chosen with the chart in mind. If a baby's chart needs Water, the parents might choose a character with the water radical, 氵, such as 江 (river) or 涵 (to contain or nourish). A chart needing Wood might lead to a character with the tree radical, 木. It's a way of giving a child the element their chart needs in the name they'll carry for life.
And this is exactly the tradition behind our Five Element Birth Chart Bracelet, which brings in the elements you need to create harmony in your life. See what your balancing element is and create your own bracelet with our free Five Element birth chart.
Opening a business and new beginnings
Shop openings, signing a lease, moving house and even the first day of a renovation are often timed to an auspicious day. Next time you see a lion dance at a new restaurant opening, there's a good chance the date was chosen with care.
Celebrations and milestones
Milestone birthdays, the first month of a new baby's life and big family celebrations are often planned around good dates too, which is why some weekends in the Chinese calendar are far busier than others.
Why BaZi still matters today
With more than a thousand years of history, BaZi is one of those ancient traditions that has proven itself for as long as it has existed, and families around the world still trust it today. For many people, BaZi isn't about predicting the future. It's a way of understanding yourself: why some things come easily and others don't, why you recharge the way you do, and what your chart might be short of.
That's why we built our free Five Element birth chart. It follows the Four Pillars tradition precisely, starting each year and month at the exact solar term and reading your hour from the sun time where you were born. In a minute, it shows your zodiac sign, the elements in your chart, your Master Element and your balancing element.
The tradition then keeps the element your chart needs close to you every day, through the colours and materials you wear. A bracelet is the simplest way to do that, and it's where our Five Element Birth Chart Bracelet comes in. It's made from natural stones chosen from your own chart and hand-strung in our Sydney studio. You'll find it at the end of your free birth chart.
Frequently asked questions
Is BaZi the same as the Chinese zodiac?
Not quite. Your zodiac animal comes from the Earthly Branch of your Year pillar, so it's one of the eight characters in your BaZi chart. BaZi reads all eight.
Do I need my birth time?
It helps. Without it there's no hour pillar, so your chart has six characters instead of eight, and some parts of the reading, including your balancing element, can't be worked out.
How is BaZi different from Western astrology?
Western astrology reads the planets and the twelve star signs. BaZi reads the Chinese solar calendar and the five elements, through the four pillars of your birth. Because it reads the year, month, day and hour you were born, it gives a deeper and more personal understanding of you.
What does "Four Pillars of Destiny" mean?
It's the English name for BaZi. The four pillars are the year, month, day and hour you were born.
Where can I see my own BaZi chart?
Our Five Element birth chart is free and takes about a minute. You'll need your birth date, time and place. For a deeper look at what each part means, read our guide on how to read your Five Element birth chart.
