Method and limits
Four Pillars
Four pillars of stem+branch; day stem is the day master.
Zi Wei chart
Read palaces and stars as a whole; structural notes, not forecasts.
Almanac days
Almanac lists are cultural labels, not odds.
Lots
Lots are for fun; today’s lot is stable for the day.
Soul notes
Playful reference only.
Calculation rules
Four Pillars uses Beginning of Spring for the year and solar terms for months. The selected day boundary applies. Zi Wei uses iztro default stars, lunar New Year, and adjusted leap months: days 1–15 use the current month, later days the next. Schools may differ. Engines: lunar-javascript and iztro.
UTC+7 (Vietnam, Thailand), UTC+8 and UTC+9 (Japan, Korea) are supported and converted to UTC+8 automatically; convert other time zones yourself first. No historical daylight-saving or true-solar-time correction.
Privacy and use
Tools still work without registering. Optional social sign-in (Google, Facebook or LINE) may receive an account id and sometimes email or display name from that provider; we do not create passwords, and sign-in never uploads birth details or charts. Birth details remain in page memory and are removed on clear or reload. They are not stored or added to URLs. Only language preference is saved locally. The site is funded by ads: pages load a Monetag MultiTag, plus an Adsterra Social Bar (a corner overlay). These scripts run on the page itself. Adsterra, Monetag and their partners may receive your IP and browser information and use cookies for ad delivery and measurement (Adsterra privacy policy: https://adsterra.com/privacy-policy/). We do not deliberately provide birth details or charts to advertisers, but we cannot prevent a third-party script from reading the page; use your browser's ad blocking if this concerns you. Each move to another page is a full page load. Visitors in the EEA, UK or Switzerland must agree before ads load. No analytics or external AI requests are enabled. You can refuse ads with your browser's ad or cookie blocking; the tools keep working.
For cultural exploration and reflection, not scientific prediction or medical, financial or legal decisions.
Method and limits
Shixu is a free set of traditional Chinese metaphysics and almanac tools: BaZi, Zi Wei Dou Shu, an almanac date finder, fortune lots and soul notes, in Traditional Chinese, English and Japanese.
All calculation happens in your browser. Calendar and pillars use lunar-javascript; Zi Wei Dou Shu uses iztro. No name, account or email is required, and no analytics or external AI is used.
FAQ
Can I rely on these charts for decisions?
No. They are a cultural and self-reflection reference, not scientific prediction, and should not guide medical, financial or legal decisions.
Which dates and time zones are supported?
Gregorian 1901–2099, with times entered in UTC+7, UTC+8 or UTC+9 (Japan, Korea). Other time zones, daylight saving and true solar time are not handled automatically.
Is it free?
Yes. Every tool is free and needs no account.