Start with the calendar. Go deeper when you need to.
Find a zodiac animal, recover a lunar birthday, compare two ways of counting age, or read a traditional time label. Each tool explains its own boundaries. A lunar-year label is not a personality diagnosis, and a clock-hour branch is not a full BaZi chart.
For Four Pillars and Zi Wei Dou Shu, use NineHound’s existing life-chart experience. That separate experience asks for a birth place and recorded time to resolve historical time zones and solar-time corrections.
There is no account or payment required for these four tools. Inputs stay in the page and are not sent to a model. See anonymous measurement and privacy.