Methodology
How Yueliang calculates and presents calendar content
This page separates deterministic calendar output from cultural interpretation so readers can see what is calculated, what is curated, and what should not be treated as professional advice.
Last updated: July 10, 2026
Lunar calendar conversion
Gregorian-to-lunar and lunar-to-Gregorian dates are calculated locally from a calendrical library. Monthly pages are generated from each Gregorian day, including the lunar month, lunar day, leap-month status, and festival matches.
Festivals and prayer dates
Festival definitions are maintained in a curated catalog. Lunar observances are converted from their lunar month and day. Solar-term observances, such as Qing Ming and the Winter Solstice, use their Gregorian solar-term calculation.
Traditional almanac activities
Auspicious and avoid labels reflect traditional Tong Shu activity categories. They are cultural references, not guarantees. Practical constraints, safety, local rules, and qualified professional advice always take priority.
Zodiac and horoscope pages
Yearly zodiac pages combine the year's animal, yin or yang quality, Five Element, and each animal's fixed element. They are generalized cultural interpretations. A full BaZi or Zi Wei Dou Shu chart requires birth date and time and can differ from a zodiac-only page.
Safety standard
No calendar or astrology page should direct medical, legal, financial, or safety-critical decisions. Medical care must never be delayed for a date preference. Report language that crosses this line to [email protected].
Independent references
These official references are useful for checking calendar conversion and the Heavenly Stems and Earthly Branches framework.