BaZi Days learning center
Understand the rules behind the result.
Practical, sourced guides to Four Pillars calculation and Chinese wedding-date selection—written to separate reproducible calendar facts from traditional interpretation.
Popular search questions
Timing questions people are already asking
These guides answer specific calculation and timing questions while keeping traditional interpretation separate from guaranteed outcomes.
Da Yun timing
BaZi Luck Pillar Starting Age: How the 3 Days = 1 Year Rule Works
Understand the common 3-day conversion, forward/reverse direction, Jie solar terms, and why starting ages differ between calculators.
Read guide →Marriage timing
BaZi Marriage Timing: What Traditional Readings Actually Look At
See how Spouse Palace, spouse-role conventions, Da Yun and annual pillars are discussed without promising a guaranteed wedding year.
Read guide →Personal BaZi charts
Start with the structure of a chart, then examine the time and location choices that can change its pillars.
Personal BaZi
What Is BaZi? Four Pillars, Eight Characters, and Day Master Explained
Understand what a BaZi chart contains, how the Four Pillars become Eight Characters, what the Day Master means, and where interpretation begins.
Read guide →Personal BaZi
Can You Calculate BaZi Without a Birth Time?
Yes, BaZi can still be calculated without a birth time—but only as a limited Three Pillars chart. See what remains reliable, what is missing, and why no hour should be guessed.
Read guide →Personal BaZi
Why Birth City and True Solar Time Can Change a BaZi Chart
Learn when true solar time, birth city, historical timezone, longitude, or DST can change a BaZi Hour, Day, or Month Pillar—and when they do not.
Read guide →Personal BaZi
Why Do BaZi Calculators Give Different Results?
Compare the time, calendar, boundary, and interpretation choices that can make two BaZi calculators produce different pillars or readings.
Read guide →Chinese wedding-date selection
Learn how general almanac suitability, personal screening, exclusions, and ranking answer different questions.
Wedding dates
How Chinese Wedding Date Selection Works
Understand the practical, almanac, personal BaZi, exclusion, and ranking layers used to build an explained Chinese wedding-date shortlist.
Read guide →Wedding dates
Chinese Almanac vs Personalized BaZi Wedding Dates
Learn the difference between a general 宜嫁娶 almanac date and a wedding date screened against both partners’ available BaZi profiles.
Read guide →Browse annual wedding-date calendars
Use the annual pages for the general calendar layer, then personalize a realistic window against both partners.
How to use these guides
Use the articles to understand inputs, conventions, and limits before interpreting a result. For the exact rules implemented in code, read the methodology. For a shorter product walkthrough, see how it works. BaZi is presented as a traditional cultural framework, not a scientifically validated prediction system.