Don't know your birth time?
Don't know your birth time? Compare 24 whole-hour Saju samples to see stable and changing pillars and visible-element ranges. No guessed birth hour or certainty score.
See what changes across a day. Compare 24 whole-hour samples—without pretending to recover your real birth hour.
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Two calculators disagree? Compare assumptions first.
The Year or Month pair differs
Check whether both tools accept a Gregorian date, and whether the year boundary is January 1, Lunar New Year, or spring commencement. For the month, compare the solar-term boundary rather than the numbered calendar month. A shared date label does not prove that both engines used the same clock convention.
The Day or Hour pair differs
Check the entered hour, date, timezone, and any daylight-saving or solar-time adjustment. This tool accepts whole hours only and uses the library's sect-2 Day convention; the late-Zi Hour convention is separate. Do not round a recorded time near a boundary and describe the result as exact.
The pairs match but the percentages differ
Ask what is being counted: six or eight visible characters, hidden stems, seasonal weights, or another weighting system. Compare raw counts before rounded percentages. Our ledger assigns one primary element to each visible character; it is not a full strength analysis.
The birth time is unknown
Use the 24-hour explorer to find sensitivity, not the most flattering result. Its samples are not probabilities and cannot recover a birth time. Keep the original record separate and consult an appropriate calendar source when a precise historical conversion matters.
A short learning route
What this explorer actually compares
For one Gregorian date, the tool calculates 00:00 through 23:00 using the same calendar engine. It groups identical pillar combinations, shows the sampled hours in each group, and reports which Year, Month, and Day values stayed the same. A group is a set of tested hours, not a continuous interval or a probability.
Why a single noon chart can hide uncertainty
When time is missing, a calculator may silently choose noon. On a solar-term transition date, Year or Month can change during that date. On 4 February 2026, comparing the midnight and noon samples demonstrates such a transition in this engine. This is a reproducible behavior check, not independent astronomical validation.
Whole hours are samples, not exact boundaries
A solar term can occur between two tested hours, so this tool cannot tell you the transition minute. Birthplace, timezone, historical daylight saving, and true solar time are not applied. Identical sampled values do not certify every possible minute. For a boundary birth, use a source that states its time basis.
How to use the result responsibly
Keep invariant sampled values separate from uncertain values. Do not choose whichever chart feels most flattering, and do not use the count of matching hours as a likelihood of birth. Ask for original birth records if precision matters. You can share a summary of the tool's stability check without disclosing the date.
Common questions
Can this find my real birth time?
No. It explores sensitivity to input time. It does not infer or rectify a birth time from your personality or life events.
Why are there more than twelve chart groups?
Two-hour branches are not the only possible change. The late-night hour rule or a solar-term transition can produce additional combinations.
Are the element ranges confidence intervals?
No. They are simply the minimum and maximum visible-symbol percentages among the 24 calculated samples.
Calculation method and external-check scope · lunar-javascript