You can still get a chart. Choose "I don't know my birth time" and we build three pillars instead of four.

Your year, month and day pillars are all fully determined without the hour — which means your day master, your element balance, your strong/weak reading and your entire ten-year cycle structure are exact. Roughly three quarters of a reading survives intact.

What you lose is the hour pillar, which traditionally speaks to your inner life, your later years and your children. Nothing else is affected.

Please do not guess. A guessed hour does not produce an approximate chart — it produces a confident wrong one, and you would have no way of knowing. A three-pillar chart that is true beats a four-pillar chart that is invented.

It is used for exactly one thing: deciding which direction your ten-year luck cycles run.

Those cycles step forward or backward through the calendar depending on your gender combined with the polarity of your birth year. It is a mechanical rule in the traditional system, and it affects nothing else in your chart — not your day master, not your elements, not your personality reading.

The tradition only recognises two values here, which is a limitation of a six-hundred-year-old system rather than a statement about anyone. If neither fits you, pick the one recorded at your birth, since that is what the rule was built around.

Choose the nearest city in the same country. Anywhere within about 100km gives you an identical chart.

The only thing your birthplace contributes is longitude, and a tenth of a degree of longitude is 24 seconds of solar time. Cities an hour's drive apart are indistinguishable at the resolution a chart can perceive.

What does matter is picking the right country, since that determines which historical timezone and daylight-saving rules apply.

Same calculation, different name and a different reading emphasis. Saju is the Korean name, BaZi the Chinese one, and both mean roughly "four pillars" or "eight characters".

Korean practice tends to lean harder on the ten gods and on practical timing questions; Chinese practice often gives more weight to structural classification. But the eight characters themselves are produced identically.

If a Saju calculator and a BaZi calculator disagree with each other, it is almost always a time-correction difference rather than a doctrinal one.

The chart and the reading you get on the next screen are free, with no account and no email required.

Your birth details are encoded into the chart's web address rather than stored on a server. That is why the link works forever and always rebuilds exactly the same chart — and why there is no account to create.

If you save a chart, it is kept in your own browser on this device. It does not follow you to another browser, and clearing your site data clears it. Keep the link and you can always get the chart back.

No, and the tradition itself does not claim that.

The standard formulation in Korean practice is that a chart describes conditions rather than outcomes — the weather, not what you do about it. It can say a decade applies pressure to your working life. It cannot say you will be fired in March, and anything that tells you otherwise is generating a prediction rather than deriving one.

There is also no controlled research showing Saju predicts anything. It is a six-hundred-year-old interpretive tradition and we present it as one: useful for reflection, not for medical, legal or financial decisions.