Methodology and sources
MyTongShu calculates public general-day facts from a versioned Tong Shu method and a versioned solar-term table that is checked by checksum every time it loads. The page copy explains those facts; it does not invent or change them.
Year and month boundaries follow the approved Jie Qi/solar-term table. Day pillars follow the fixed civil-date sequence; hour pillars use the recorded local civil time when a time is supplied. Leap-month and 60 Jia Zi handling follow the approved method.
Public general-day pages use Malaysia time (MYT). Personal calculations use the resolved birth and forecast locations with historical time zone rules. Nonexistent or ambiguous daylight-saving times, unsupported places and solar-term boundary review zones fail safely rather than being silently guessed.
Day Officers and the approved activity mappings provide the general suitability layer. Daily Flying Star, 28 Mansions, Day Deity, clash, Sha and void information are shown as bounded reference context; they cannot override the primary day or personal tier.
Private results compare approved birth facts with the same general date facts and selected life context. Presentation can be edited later without recalculating the fixed facts or changing their recorded sources.
Unknown birth time can produce a limited chart but does not unlock paid personalisation where the hour is required. Estimated ranges and dates close to a solar-term boundary remain review-gated until a range-aware method exists.
They are not personal forecasts, medical, legal or financial advice, and they do not guarantee outcomes. Personal results stay private to your account and are not indexed.
Each page shows its method and solar-term table versions so a later approved revision can be checked separately. Corrections update the affected canonical page and its meaningful sitemap date only. Source code and proprietary rule files are not exposed by this explanation.
General almanac data on this page uses Malaysia time (MYT). Personalized calculations use your saved birth and location settings.
Browse the public Tong Shu reference How to read a date
Understand Day Officers · Compare general and personal context