Start with a free Birth Pattern by entering a birth date, birthplace time zone and, if known, a birth time. YAO shows the Four Pillars, Day Master, Hidden Stems, Ten Gods, two views of five-element occurrences, Luck Pillars and the current annual pillar. When the birth time is unknown, it leaves the hour pillar open. The chart stays in the browser.
The method page explains its default civil-time, midnight-boundary calculation and optional mean or true solar-time and 23:00 day-boundary profiles. It also spells out how historical time zones, daylight-saving changes and uncertain solar-term boundaries are treated. Counts of elements are presented as occurrences, without a strength or favorable-element verdict.
The free I Ching tool lets you pose a question and cast six lines using digital or physical three-coin throws. A library covers all 64 hexagrams. For more detailed BaZi interpretation, YAO offers a limited personal preview, complete fictional sample reports and an optional US$19 one-time Personal Reading. The tools are framed for cultural exploration and reflection, not specific-event prediction.
