Chinese Zodiac Hour Calculator
Your birth year gives one zodiac animal. Your birth time can be read through another traditional layer: the 12 Chinese two-hour periods, or shíchen 时辰. Each period is linked with one Earthly Branch and one zodiac animal.
Find your zodiac hour sign
Enter a birth time using the 24-hour clock. This calculator returns the traditional Chinese hour, its Earthly Branch, and the animal sign connected with that time period.
This page gives the traditional two-hour zodiac period for a clock time. It is not a complete BaZi 八字 chart. Formal chart work may consider date rollover, birthplace, time zone, and sometimes solar-time adjustments.
What is a Chinese zodiac hour?
In the traditional time system, a full day is divided into 12 two-hour periods. These are the 12 shíchen 时辰. Each period uses one of the 12 Earthly Branches, and each branch is also associated with a zodiac animal.
That is why the period from 23:00 to 01:00 is called Zi hour 子时 and linked with the Rat 鼠. The next period, from 01:00 to 03:00, is Chou hour 丑时 and linked with the Ox 牛. The pattern continues through all 12 branches.
The 12 zodiac hours
Use this table as a reference if you want to read the hour layer without using the calculator.
| Modern time | Chinese hour | Earthly Branch | Zodiac animal |
|---|---|---|---|
| 23:00–00:59 | Zi hour 子时 | Zi 子 | Rat 鼠 |
| 01:00–02:59 | Chou hour 丑时 | Chou 丑 | Ox 牛 |
| 03:00–04:59 | Yin hour 寅时 | Yin 寅 | Tiger 虎 |
| 05:00–06:59 | Mao hour 卯时 | Mao 卯 | Rabbit 兔 |
| 07:00–08:59 | Chen hour 辰时 | Chen 辰 | Dragon 龙 |
| 09:00–10:59 | Si hour 巳时 | Si 巳 | Snake 蛇 |
| 11:00–12:59 | Wu hour 午时 | Wu 午 | Horse 马 |
| 13:00–14:59 | Wei hour 未时 | Wei 未 | Goat 羊 |
| 15:00–16:59 | Shen hour 申时 | Shen 申 | Monkey 猴 |
| 17:00–18:59 | You hour 酉时 | You 酉 | Rooster 鸡 |
| 19:00–20:59 | Xu hour 戌时 | Xu 戌 | Dog 狗 |
| 21:00–22:59 | Hai hour 亥时 | Hai 亥 | Pig 猪 |
Why Zi hour starts at 23:00
This is one of the details that surprises English readers. The first traditional hour of the day is Zi hour 子时, and it begins at 23:00, not at midnight. So a time like 11:30 p.m. belongs to Zi hour, the Rat hour.
For a simple zodiac-hour reference, that is enough. For formal BaZi or Four Pillars work, however, late-night birth times may raise a separate date-boundary question. Some traditions treat late Zi hour with more technical rules. This page keeps the reading simple and transparent: it maps the clock time to the traditional two-hour branch period.
How to read the hour animal carefully
The hour animal is not the same as the birth-year animal. Your year sign is the broad public-facing layer most people know. The hour sign is a time-of-day layer connected with the Earthly Branch used for that two-hour period.
The familiar zodiac sign based on your lunar birth year, such as Dragon, Horse, or Rabbit.
The animal linked with the two-hour period of your birth time, such as Zi Rat or Wu Horse.
A complete chart uses year, month, day, and hour pillars. This page only explains the hour branch layer.
Common mistakes
- Expecting the hour animal to replace the year animal. It does not. It is an additional layer.
- Assuming midnight starts the first hour. Zi hour begins at 23:00 in the traditional system.
- Using this as a full BaZi calculator. A full chart needs more than a birth time.
- Forgetting time zone and birthplace in serious chart work. This simple tool uses the clock time you enter.
FAQ
What is my Chinese zodiac hour?
Your Chinese zodiac hour is the animal sign linked with the two-hour period in which you were born. For example, 23:00–00:59 is Zi hour 子时, linked with the Rat.
Is the Chinese zodiac hour the same as my zodiac sign?
No. Your usual zodiac sign comes from your birth year. The zodiac hour comes from your birth time.
Why does Rat hour start at 11 p.m.?
In the traditional 12-hour system, Zi hour 子时 runs from 23:00 to 01:00. It crosses midnight, which is why late-night births can feel confusing.
Does this calculator make a full BaZi chart?
No. It only maps a birth time to the traditional two-hour zodiac period. A full BaZi chart uses year, month, day, and hour pillars.
Should I use local time?
For this simple cultural reference, use the local clock time of birth if you know it. Formal chart work may require more precise time handling.
Next steps
Editorial note
This page maps modern clock time to the traditional Chinese 12-shichen system and its Earthly Branch animal associations. It is meant as a cultural and educational reference. It does not calculate a complete BaZi chart, and it should not be used as medical, legal, relationship, or life-decision advice.