Solar terms, to the minute
The year pillar changes at the instant of lichun, and each month pillar at its own solar term. We resolve these to the second and compare them with your corrected birth time, so a birth on 4 February is not guessed.
How we compute
Most chart apps hide their assumptions. Ours are on the page. Here is exactly what goes into a chart.
Historical time zones
Korea used UTC+8:30 between 1954 and 1961, and daylight saving ran in 1948–1960 and 1987–1988. We read offsets from the time-zone database rather than assuming today’s rules apply to your birth year.
True solar time
A clock reads standard time, but the sun reads longitude. We apply a longitude correction, and optionally the equation of time. Both are shown in the audit panel, and both can be switched off.
What we do not do
We do not predict events, give medical or financial advice, or claim a hit rate. The reading is a structured reflection written from the numbers; the numbers are the product.
For entertainment and self-reflection only. We make no claims of prediction and no guarantee of accuracy about the future.