new UI draft · weby/en

Four Pillars Reading 四柱

Your date and time of birth are calculated inside this browser only. A summary of the result is sent only when an AI answer is written · details

Date and time of birth

Name or nickname
Reading the same name again updates that saved record.
Calendar
Date of birth 8 digits
Time of birth 4 digits 24-hour clock, hour (2) and minute (2). 8:30 am → 0830, 11:05 pm → 2305. 2400 is read as 23:59 of that day.
Sex
Used to decide whether the luck cycles run forward or in reverse.
Advanced

Ask and talk it through AI

When the AI opens, paste into its input box.

The button copies the full calculated chart and the request wording, then opens ChatGPT in a new tab. Paste it in (Ctrl+V, or ⌘V on a Mac) and that AI reads the chart from the same figures; ask it anything from there. Nothing is sent anywhere by this site on this route.

Four Pillars

How the time and solar term were worked out

You and what surrounds you day master · elements · ten gods

  1. 1Day master you

  2. 2Five elements the ground you stand on

    What the five elements mean
    Reading the figures in this chart
  3. 3Ten gods how you stand to what is around you

About this card

The first three steps in reading a chart. First what your own force is, then what surrounds it, and last how those two stand to each other. The first two are separate stories; they meet in the third, and that is where the reading begins.

Stars auspicious · inauspicious

About this card

These stars point to traits of character, or to features of the surroundings.

Ten-year luck cycles

The cycles mark out life in ten-year stretches.

Cycles table and reading
How the cycles were set

If the chart is the vessel you were born with, a cycle is closer to what gets poured into it.

Annual luck year by year

Year-by-year table
YearAgePillarTo the day masterIn a line

Detailed reading key element · structure · harmonies and clashes

Open the detailed reading

What the cards above do not cover — the force that helps you (key element), the name for how the chart is built (structure), and the places worth watching (harmonies, clashes and the void).

At a glance day master · strength · structure · key element · climate · void

Open the summary

The values from above, gathered into six panels. Each panel says what the term means and what the reading rests on.

Privacy and storage

Calculation happens inside this browser. The date and time you enter never leave it. Only when an AI answer is written is a summary of the result (four pillars, five elements, ten gods, key element, luck cycles) sent to the answer relay.

Saved charts stay in this browser only. To keep them across a new device or cleared browser data, set a save file once under Saved charts; from then on records are written there automatically.

A chart card saved as an image stays on this device. Still, the eight characters on it effectively reveal your date of birth — keep that in mind before sending it on or posting it.

The advertisement at the end of the results is drawn by Coupang. Scrolling down to it connects to Coupang's servers and may set Coupang cookies. Your chart and date of birth are not sent there.

Four Pillars astrology is a long-standing East Asian tradition of interpretation. Take what this page produces as cultural and recreational reading, not as grounds for decisions about medicine, law or money.
Calculated with korean-saju (KASI solar–lunar data 1900–2050 · solar terms 2000–2027, other years computed astronomically) · run in the browser by Pyodide.

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