To find your Chinese birth hour, use the local civil time recorded at your birthplace and match it to one of the 12 two-hour shichen. For example, 8:20 a.m. is Chen, or Dragon hour; 4:45 p.m. is Shen, or Monkey hour. Keep the original record and note any uncertainty near a boundary.

In brief: A basic lookup needs a reliable birth time and its place. It does not require converting the clock time into a “lunar hour.” Date conversion and hour lookup are separate. Specialist BaZi tools may additionally correct time zones, daylight saving, longitude, solar time, and the Zi-hour day boundary; they should show those choices.

Contents

Step 1: find the best birth-time record

Start with evidence, in this order when available:

  1. a birth certificate or civil registration;
  2. a hospital or midwife record;
  3. a baby book, diary, letter, or contemporary family note;
  4. a close relative’s memory;
  5. later recollection or inference.

Record exactly what the source says. “6:42 a.m.”, “about seven,” and “near sunrise” have different precision. Do not turn a rounded memory into an exact minute before calculating.

Also record the birthplace. A time without a place cannot establish the applicable civil time zone or daylight-saving rules.

Step 2: use the 12-shichen lookup

Match the recorded local clock time to the standard sequence. Zi is Rat from 11 p.m.–1 a.m.; Chou is Ox from 1–3 a.m.; Yin is Tiger from 3–5 a.m.; Mao is Rabbit from 5–7 a.m.; Chen is Dragon from 7–9 a.m.; and Si is Snake from 9–11 a.m.

Wu is Horse from 11 a.m.–1 p.m.; Wei is Goat from 1–3 p.m.; Shen is Monkey from 3–5 p.m.; You is Rooster from 5–7 p.m.; Xu is Dog from 7–9 p.m.; and Hai is Pig from 9–11 p.m.

This gives the hour branch and animal. It does not give the Heavenly Stem required for a complete BaZi hour pillar. Keep Chinese Zodiac Hours open when you want the same lookup in table form.

Step 3: check the boundary

The standard ranges are half-open: one period begins when the previous one ends. Under that convention, 6:59 a.m. is Mao and 7:00 a.m. begins Chen.

If the record is rounded or approximate, keep both candidates. “Around 7 a.m.” can mean late Mao or early Chen. A calculator cannot recover precision that the source never recorded.

Zi needs one extra note. It runs across midnight from 11 p.m. to 1 a.m. The branch is Zi on both sides, but specialist systems may select the day pillar differently. See Early Zi and Late Zi Hour.

Step 4: preserve place and time-zone context

Use the time as it was recorded locally before applying corrections. Do not automatically convert every non-Chinese birth to Beijing time; the birth event did not occur on a Beijing wall clock.

For a specialist calculation, check:

  • the historical time zone at the birthplace;
  • whether daylight saving was active on that date;
  • whether the record itself already reflects daylight saving;
  • whether the method applies longitude or apparent solar time;
  • whether the corrected time crosses a shichen boundary.

Show both original and corrected time. Otherwise readers cannot reproduce the result or see why the branch changed.

Step 5: separate date conversion from hour calculation

The Chinese calendar is lunisolar, but that does not mean there is a separate lunar clock with different hourly numerals. A Gregorian-to-lunar converter changes the date representation. The shichen lookup still starts from a documented local time and an explicit time convention.

Use the BaseToolbox Gregorian to Chinese Lunar Calendar Converter when you need the corresponding lunar year, month, and day. It runs in the browser and clearly labels its supported date range.

The converter does not:

  • determine an hour branch from birthplace;
  • calculate the day or hour pillar;
  • apply true solar time;
  • resolve the 23:00 versus 00:00 Zi boundary;
  • interpret a chart.

Those limits are useful. One transparent date tool is safer than a single opaque result that silently combines unrelated conventions.

What to do when the time is unknown

Do not choose an hour by matching online personality descriptions. That reverses the method and encourages confirmation bias.

Instead, report the available window. “Between 5 and 8 a.m.” supports Mao or Chen. “Morning” may support several branches. Ask relatives for the event around the birth—sunrise, breakfast, a work shift, a radio program—but keep such clues labeled as recollection, not official time.

If no evidence narrows the period, leave the hour pillar unknown. The year, month, and day data do not become invalid merely because the fourth pillar is unavailable.

Worked examples

Recorded time far from a boundary

A birth certificate says 4:18 p.m. local time. It falls securely within Shen, 3–5 p.m., corresponding to Monkey. The basic cultural lookup needs no further precision.

Recorded time exactly on a boundary

A certificate says 5:00 p.m. Under the standard table, You begins at 5:00 p.m., so the result is Rooster hour. Record that the time is exactly at the boundary in case another method corrects it.

Approximate family memory

A relative remembers “just before sunrise,” with no date-specific clock time. Season and latitude affect sunrise, so do not force a branch. Research the record first and retain a range if none is found.

Frequently asked questions

What is my Chinese birth hour if I was born at noon?

Noon falls within Wu, or Horse hour, from 11 a.m. to 1 p.m.

Should I use the hospital time or true solar time?

Use the hospital time for the standard lookup. If a specialist method applies solar correction, keep the original visible and state the correction separately.

Does daylight saving matter?

It can matter near a boundary. Confirm whether the recorded local time already included daylight saving and whether the calculator adjusts it again.

Can a lunar converter find my hour animal?

Not by date conversion alone. It can convert the calendar date; the animal-hour lookup requires local birth time.

What if the certificate gives only the date?

The hour branch and hour pillar remain unknown. Do not manufacture one from personality or life events.

Keep the source beside the result

Finding a shichen is easy when the input is clear: recorded local time, standard two-hour range, and a boundary check. The responsible method becomes even more valuable when the record is unclear—preserve the evidence, show corrections, and let uncertainty remain visible. Keep The 12 Shichen as the canonical range table.

Sources