Chinese Time Calculator · Ancient Shichen & Modern Time Converter
Enter any time to automatically find the corresponding ancient Chinese Shichen (Zi, Chou, Yin, etc.), with aliases, Five Elements attributes, and historical origins. Includes a complete reference table. Runs locally for full privacy.
Supports precision down to the second, automatically maps to the corresponding ancient Shichen
Shichen Analysis · Detailed Information
👈 Please select a time and click the query button
Supports querying Shichen information for any time, including aliases, Five Elements, and historical origins
📋 Complete Twelve Shichen Reference Table
| Shichen | Alias | Modern Time | Five Elements | Suitability |
|---|---|---|---|---|
| Zi Shi Zi Hour | Midnight · Yeban · Zhongye | 23:00 - 01:00 | Water (Yang Water) | Setting beds, praying for blessings, seeking offspring |
| Chou Shi Chou Hour | Rooster Crow · Huangji | 01:00 - 03:00 | Earth (Yin Earth) | Sacrifices, bathing, burials |
| Yin Shi Yin Hour | Dawn · Liming · Morning | 03:00 - 05:00 | Wood (Yang Wood) | Traveling, seeking wealth, weddings |
| Mao Shi Mao Hour | Sunrise · Rishi · Daybreak | 05:00 - 07:00 | Wood (Yin Wood) | Traveling, seeking officialdom, market opening |
| Chen Shi Chen Hour | Breakfast · Zaoshi | 07:00 - 09:00 | Earth (Yang Earth) | Dining, meeting friends, seeing dignitaries |
| Si Shi Si Hour | Midmorning · Yuzhong | 09:00 - 11:00 | Fire (Yin Fire) | Studying, working, seeking wealth |
| Wu Shi Wu Hour | Noon · Rizheng · Midday | 11:00 - 13:00 | Fire (Yang Fire) | Traveling, weddings, market opening |
| Wei Shi Wei Hour | Afternoon · Ridie · Riyang | 13:00 - 15:00 | Earth (Yin Earth) | Afternoon nap, meeting friends, negotiations |
| Shen Shi Shen Hour | Late Afternoon · Xishi | 15:00 - 17:00 | Metal (Yang Metal) | Working, exercising, seeking wealth |
| You Shi You Hour | Sunset · Riluo · Evening | 17:00 - 19:00 | Metal (Yin Metal) | Returning home, dining, gathering |
| Xu Shi Xu Hour | Dusk · Rixi · Rimu | 19:00 - 21:00 | Earth (Yang Earth) | Walking, entertainment, resting |
| Hai Shi Hai Hour | Nightfall · Dinghun | 21:00 - 23:00 | Water (Yin Water) | Sleep, meditation, rest |
📐 Understanding the Ancient Chinese Time System
What is the Twelve Shichen System?
The Twelve Shichen is an ancient Chinese timekeeping method originating from the Heavenly Stems and Earthly Branches calendar system, with roots tracing back to the Shang Dynasty. Ancient scholars divided a full solar day of 24 hours into twelve distinct periods, each known as a "Shichen." Every Shichen corresponds exactly to two modern hours. This system was deeply integrated into daily life, from agriculture to imperial court schedules, and remains a cornerstone for understanding traditional Chinese culture and historical texts today.
The twelve Shichen are named after the Twelve Earthly Branches: Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, and Hai. Each Shichen possesses a unique alias that poetically describes the time of day, such as "Yeban" (Midnight) for Zi Shi, and is intrinsically linked to a specific Five Elements attribute, reflecting the philosophical belief in the cyclical balance of nature.
How Do Shichen Correspond to Modern Time?
The mapping between Shichen and modern time is a fixed, sequential cycle starting with Zi Shi at 23:00, marking the beginning of the day in the traditional Chinese calendar. The transition follows a consistent two-hour progression. Understanding this correspondence is key to converting modern timestamps for cultural, astrological, or historical research purposes, allowing a bridge between ancient wisdom and contemporary scheduling.
Zi Shi (23:00-01:00) · Midnight · Rat | Chou Shi (01:00-03:00) · Rooster Crow · Ox
Yin Shi (03:00-05:00) · Dawn · Tiger | Mao Shi (05:00-07:00) · Sunrise · Rabbit
Chen Shi (07:00-09:00) · Breakfast · Dragon | Si Shi (09:00-11:00) · Midmorning · Snake
Wu Shi (11:00-13:00) · Noon · Horse | Wei Shi (13:00-15:00) · Afternoon · Goat
Shen Shi (15:00-17:00) · Late Afternoon · Monkey | You Shi (17:00-19:00) · Sunset · Rooster
Xu Shi (19:00-21:00) · Dusk · Dog | Hai Shi (21:00-23:00) · Nightfall · Pig
What Determines the Five Elements Attribute of a Shichen?
The Five Elements (Wu Xing) attribute of each Shichen is derived directly from the intrinsic nature of its governing Earthly Branch. This classification reflects the dynamic cycle of creation and control that underpins Chinese metaphysics, influencing interpretations in astrology and traditional medicine.
· Wood: Yin Shi (Yang Wood), Mao Shi (Yin Wood)
· Fire: Si Shi (Yin Fire), Wu Shi (Yang Fire)
· Metal: Shen Shi (Yang Metal), You Shi (Yin Metal)
· Water: Hai Shi (Yin Water), Zi Shi (Yang Water)
· Earth: Chou Shi, Chen Shi, Wei Shi, Xu Shi (All Earth)
Practical Applications of the Twelve Shichen
Bazi Destiny Analysis: The "Hour Pillar" in a Bazi (Eight Characters) chart is defined by the birth Shichen, a crucial component for personality and fortune readings.
Classical Literature Interpretation: Ancient texts frequently use Shichen to mark events, such as "Zi Shi, Third Watch," making this knowledge essential for historians and enthusiasts.
Traditional Date Selection: Auspicious occasions like weddings, business openings, or relocations often require selecting a favorable Shichen, a practice still observed today.
Traditional Chinese Medicine (TCM): The Meridian Flow theory (Zi Wu Liu Zhu) asserts that qi vital energy circulates through different organs at specific Shichen, guiding therapeutic treatments.
Cultural Heritage Studies: Learning this system offers a profound connection to the sophisticated timekeeping wisdom of ancient China.
📖 How to Use This Chinese Time Calculator
Step 1: Select a Time — Use the time picker to select your desired time, accurate to the second, for a precise ancient Chinese time conversion.
Step 2: Click the Query Button — Press the green "Find Shichen" button. The tool will instantly perform a local calculation to match your input.
Step 3: Review the Results — The detailed panel on the right will display the Shichen name, its poetic alias, modern time range, Five Elements attribute, traditional suitability guidance, and rich historical origins.
Step 4: Explore the Reference Table — Below the calculator, a comprehensive Twelve Shichen reference table is provided for quick comparison and study of all twelve periods.
⚠️ Important Notes
Shichen Boundary Handling: The ancient Shichen system relies on local true solar time. This Shichen calculator uses Beijing Time (UTC+8) as the standard, which may introduce slight variations for regions at different longitudes.
Zi Shi Division: In traditional Chinese astrology, Zi Shi is sometimes divided into "Late Zi Shi" (23:00-00:00) and "Early Zi Shi" (00:00-01:00). This online tool treats the entire period from 23:00 to 01:00 uniformly for simplicity.
Suitability Guidance: The suitability and taboos are sourced from traditional Chinese almanac culture for informational purposes and should be viewed with rational judgment.
Privacy Protection: This is a pure frontend tool; all time conversions are computed locally in your browser. No personal data is ever uploaded or stored.
❓ Frequently Asked Questions About the Twelve Shichen
Q: What is the Twelve Shichen system exactly?
A: The Twelve Shichen is an ancient Chinese timekeeping system that divides a day into 12 two-hour periods. Each Shichen is named after an Earthly Branch and associated with a specific animal zodiac sign. It was the standard time measurement for centuries in China, used for everything from court rituals to daily farming schedules.
Q: How can I convert modern time to an ancient Chinese Shichen?
A: You can use our free Chinese Time Calculator above. Simply select any time in 24-hour format, and the tool will automatically calculate the correct Shichen for you. The fixed mapping starts with Zi Shi at 23:00-01:00, with each subsequent Shichen occupying the next two-hour block.
Q: What are the Earthly Branches and why are they important for a time calculator?
A: The Earthly Branches are a system of twelve ordinal symbols used in ancient China for recording time, months, and years. They form the core naming convention for the Shichen, such as Zi, Chou, and Yin. A reliable time calculator must map modern hours directly to these branches to produce accurate results for astrology and calendar studies.
Q: How does the Five Elements theory relate to the Shichen?
A: Each Shichen has a fixed Five Elements attribute (Wood, Fire, Earth, Metal, or Water) based on its Earthly Branch. For instance, Yin Shi and Mao Shi are Wood, representing growth and vitality at dawn, while Wu Shi is Fire, reflecting the peak of yang energy at noon. This relationship is used extensively in Chinese metaphysics and traditional medicine.
Q: Can I use this tool for Bazi fortune-telling?
A: Yes, this ancient time converter is perfectly suited for determining the "Hour Pillar" in Bazi (Eight Characters) charting. Knowing your exact birth Shichen is the first essential step for any Ba Zi calculation. Our tool gives you the precise Shichen name and its corresponding Earthly Branch for your birth time.
Q: Why does the traditional Chinese day start at 23:00 instead of midnight?
A: In the traditional Chinese calendar, the day begins with Zi Shi at 23:00, not 00:00, based on the philosophical concept of "Zi the First of the Twelve." This is a fundamental rule that our calculator follows to ensure cultural and astrological accuracy for all Chinese time conversion tasks.
Q: Is there a difference between the Chinese Shichen and Japanese or Korean time systems?
A: Yes, while Japan, Korea, and Vietnam historically adopted the Chinese system of twelve double-hours, they developed their own zodiac associations and naming conventions. For example, the Japanese Jikoku system uses the same structure but has culturally specific names for the periods. Our tool focuses specifically on the classical Chinese Shichen tradition.
Q: How accurate is this Chinese Time Calculator for historical research?
A: It is highly accurate for interpreting standard ancient Chinese texts and records, as it uses the orthodox Beijing Time-based calculation. However, for extremely precise historical research involving a specific location's solar time, a professional astronomical almanac may be needed to account for geographical longitude adjustments.