Question 1

What is Zi in the Earthly Branches?

Accepted Answer

Zi (子) is the first of the Twelve Earthly Branches. It is used in traditional systems for naming times, months, days, years, and directions, and it corresponds to the Rat in the animal cycle.

Question 2

How do you pronounce Zi (子)?

Accepted Answer

Modern Standard Mandarin pronounces it zǐ, with the third tone. “Dzuh” is only a rough English aid; the Mandarin consonant and vowel do not have exact English matches.

Question 3

Why is Zi first?

Accepted Answer

Zi is first because it occupies position one in the conventional twelve-branch sequence. Later writers connected that position with renewal and hidden beginnings, but those are symbolic interpretations rather than the original pictographic meaning of 子.

Question 4

What time is Zi hour?

Accepted Answer

Zi hour is commonly mapped to 11 p.m.–1 a.m. in the modern 24-hour system. It is a conventional conversion of a traditional double-hour and straddles modern midnight.

Question 5

Does a Chinese day begin at 11 p.m.?

Accepted Answer

Not in every convention. Modern civil dates change at midnight; some Four Pillars methods change the stem-branch day at 11 p.m.; and others split Zi hour around midnight.

Question 6

Is Zi month always the lunar eleventh month?

Accepted Answer

The branch Zi is conventionally associated with month 11, but “Zi month” may mean a solar-term interval from Heavy Snow to Moderate Cold. The lunar eleventh month follows new moons, so the two definitions should be kept separate.

Question 7

Is Zi Yin Water or Yang Water?

Accepted Answer

Zi is commonly listed as a Yang branch associated with Water. In later hidden-stem tables it contains Gui, an Yin Water stem. The two labels refer to different classification layers.

Question 8

Why is Zi paired with the Rat?

Accepted Answer

The Zi–Rat pairing was conventional by the Eastern Han. Its exact origin is unsettled; stories about a race, midnight activity, or odd and even paws are later explanatory folklore.

Question 9

Is a Zi year the same as a Rat year?

Accepted Answer

When discussing years, a Zi year is a Rat year. Zi has wider technical use, however, because it can also identify a month, day, hour, or direction.

Question 10

When does the Rat year begin?

Accepted Answer

Public calendars and festival practice normally change the zodiac animal on Lunar New Year's Day. Some Four Pillars methods use Li Chun, so early-February dates require the convention to be stated.

Question 11

What are the five Rat-year types?

Accepted Answer

They are Wood Rat (Jiazi), Fire Rat (Bingzi), Earth Rat (Wuzi), Metal Rat (Gengzi), and Water Rat (Renzi). The phase comes from the year's Heavenly Stem.

Question 12

How is the year-stem element different from Na Yin?

Accepted Answer

The animal label uses the phase of the year's Heavenly Stem. Na Yin assigns another traditional phase-name to the complete two-year stem-branch pair, so the two categories can differ.

Question 13

Why is Jiazi the first of sixty pairs?

Accepted Answer

Jia is stem one and Zi branch one. Advancing the ten-stem and twelve-branch cycles together returns to the starting pair after 60 steps, the least common multiple of 10 and 12.

Question 14

Which branches combine or conflict with Zi?

Accepted Answer

Later tables list Shen–Zi–Chen San He, Hai–Zi–Chou San Hui, Zi–Chou Liu He, Zi–Wu Chong, Zi–Mao Xing, Zi–Wei Hai, and Zi–You Po. Their interpretation and weight vary by school.

Question 15

Does Zi correspond to Capricorn or Aquarius?

Accepted Answer

No standard historical equivalence connects Zi with either sign. Modern correspondence charts vary, and the Chinese branch, solar-term, lunar-month, and Western zodiac systems use different definitions.

Earthly Branch Zi

Earthly Branch Zi (子): Zi Hour, Rat Years, and Calendar Meaning

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