Chinese zodiac hours divide the day into 12 traditional two-hour periods called shichen. Rat hour begins at 11:00 p.m., Ox hour at 1:00 a.m., and the sequence continues through Pig hour from 9:00 to 11:00 p.m. The animals correspond to the same 12 Earthly Branches used in zodiac years.
In brief: Find the local clock time, place it in the table below, and read the corresponding animal. These hours are a traditional timekeeping and symbolic system—not a medical schedule or a scientific personality test.
Contents
- Chinese zodiac hours chart
- Why Rat hour begins at 11 p.m.
- What your birth-hour animal means
- Zodiac hours and the Chinese body clock
- How precise is the modern clock conversion?
- Frequently asked questions
Chinese zodiac hours chart
| Modern local time | Shichen / branch | Zodiac animal |
|---|---|---|
| 11:00 p.m.–1:00 a.m. | Zi (子) | Rat |
| 1:00–3:00 a.m. | Chou (丑) | Ox |
| 3:00–5:00 a.m. | Yin (寅) | Tiger |
| 5:00–7:00 a.m. | Mao (卯) | Rabbit |
| 7:00–9:00 a.m. | Chen (辰) | Dragon |
| 9:00–11:00 a.m. | Si (巳) | Snake |
| 11:00 a.m.–1:00 p.m. | Wu (午) | Horse |
| 1:00–3:00 p.m. | Wei (未) | Goat |
| 3:00–5:00 p.m. | Shen (申) | Monkey |
| 5:00–7:00 p.m. | You (酉) | Rooster |
| 7:00–9:00 p.m. | Xu (戌) | Dog |
| 9:00–11:00 p.m. | Hai (亥) | Pig |
This standard mapping is published by the Hong Kong Observatory in its reference on Heavenly Stems and Earthly Branches (HKO time service).
Why Rat hour begins at 11 p.m.
A traditional Chinese day can be organized through the 12 Earthly Branches. Each branch covers approximately two modern hours. The first branch, Zi, straddles midnight rather than beginning at 12:00 a.m. Consequently, the cycle runs from 11:00 p.m. to 11:00 p.m.
The animal is a mnemonic correspondence for the branch, not the mechanism that measures time. Popular explanations say rats are active around midnight, oxen are fed before dawn, and roosters announce evening or morning transitions. These stories make the sequence memorable, but the underlying framework is the established branch order.
Traditional timekeeping was not identical to a phone displaying standardized civil time. Sundials, water clocks, watches, night watches, local observation, and later mechanical clocks all belong to different historical contexts. The two-hour table is the clearest modern conversion, not proof that every person in every dynasty used minutes exactly as we do.
For the broader history and subdivisions within a shichen, continue with The 12 Shichen: Traditional Chinese Hours.
What your birth-hour animal means
In popular Chinese astrology, a birth-hour animal is sometimes described as a more private or inward layer beside the public birth-year animal. For example, a person born in a Dragon year during Rabbit hour might be described through both symbols.
In a full Four Pillars (bazi) chart, however, the hour is not represented by an animal alone. The hour pillar has both a Heavenly Stem and Earthly Branch, and its calculation depends on additional calendrical rules. A simple table can identify the branch animal, but it cannot reproduce a full chart.
Use the birth-hour animal as a cultural prompt:
- Compare the imagery of the year and hour animals.
- Learn the Chinese branch name rather than stopping at a personality adjective.
- Notice how animals connect year cycles with daily cycles.
- Avoid treating a symbolic pairing as a fixed limit on compatibility, career, or character.
If you still need the correct year animal, start with What Is My Chinese Zodiac Sign?.
Zodiac hours and the Chinese body clock
Many English infographics place an internal organ beside each two-hour period. This comes from traditional Chinese medicine correspondences often described through zi wu liu zhu. The zodiac-hour table and the “organ clock” therefore use the same 12 time blocks, but they are not the same claim.
- Zodiac hours / shichen: a historical time division associated with Earthly Branches and animals.
- Chinese body clock: a TCM interpretive model associating periods with channels or organ systems.
- Modern circadian science: research on biological rhythms influenced strongly by light and darkness, among other factors.
Modern circadian research does not validate internet claims that one organ “detoxes” only during a fixed two-hour window. Our Chinese body clock guide keeps the traditional model and current sleep science clearly separated.
How precise is the modern clock conversion?
For general cultural reading, use the local civil time on the birth record. More specialized astrology may adjust for birthplace, time zone, daylight-saving time, or apparent solar time. Those choices can move a birth near a boundary into another branch.
If the recorded time is exactly 1:00, 3:00, 5:00, or another boundary, document the source and the convention used. Do not hide uncertainty behind a confident animal result. A calculator should say whether it uses civil time or a solar-time adjustment.
The issue is similar to zodiac-year cutoffs: the useful answer depends on naming the method. Everyday readers need a transparent common convention; specialist systems may require more data.
Frequently asked questions
What is my Chinese zodiac hour?
Match your local birth time with the two-hour table. For example, 8:30 a.m. is Dragon hour, while 4:20 p.m. is Monkey hour.
What animal rules midnight?
Rat. Zi or Rat hour runs from 11:00 p.m. through 1:00 a.m., so midnight sits at its center.
What animal rules noon?
Horse. Wu or Horse hour runs from 11:00 a.m. to 1:00 p.m.
Are zodiac hours used for medical advice?
No. The hours are a cultural timekeeping system. TCM adds medical correspondences, but a time block cannot diagnose a symptom or replace qualified healthcare.
Does daylight-saving time change my birth-hour animal?
It can matter near a boundary in systems that adjust civil time. For a casual cultural lookup, use the time recorded at birth. For a specialist chart, ask which time correction method the practitioner or tool applies.
A daily cycle behind the yearly one
Chinese zodiac hours show that the 12 animals are more than birth-year labels. They make the Earthly Branch cycle visible within a single day: Rat at midnight, Horse at noon, and the other animals marking the movement between them. Read the chart as traditional timekeeping first, then add astrological interpretations only with a clearly named method.