Chinese Lunar Calendar

Theory, Leap Month, High-Precision Astronomical Data (1 to 2246 A.D.) and Conversion Programming


How does Chinese Lunar Calendar work? When people are saying Chinese Lunar Calendar, they mean the Chinese calendar. Chinese calendar combines solar-Lunar and Stem-Branch counting system together. There is no short answer for how Chinese Lunar Calendar works. It's a little bit complicate. We explain it the following article - The theory of Chinese Lunar Calendar. The next common question is how to convert Chinese Lunar Calendar.

Many people are looking for the calculation formula to convert from the Gregorian calendar to Chinese Lunar Calendar. Actually, there is no mathematical or astronomical formula for Chinese Lunar Calendar Conversion to satisfy me during my research from 1988 to 1992. All the formulas I found create low-precision results, which unable to handle the Chinese lunar leap months. This is because the motion and rotation of moon are uneven, unstable and wobbling, it's very hard to have an accurate formula for Chinese Lunar Calendar over any century. Any straight-forward formula available today only gives us a low-precision result. Without a high-precision astronomical data, the assignments of Chinese Lunar Leap Month (a.k.a. Intercalary Month) will become a great chaos. Before learning how to do the Chinese Lunar Calendar conversion programming with high-precision astronomical data used in the, we have to know the theory and the imperfection of the Chinese Lunar Calendar system.

Table of Contents

The Theory of Chinese Lunar Calendar - The background of the Chinese Lunar Calendar

Chinese Lunar Leap Months -  How to assign Leap Month, Double-Center-Point Lunar Month, Fake Leap Month

Sun and Moon Astronomical Data - Study Chinese Astronomical/Civil Calendars using Sun and Moon data

Astronomical Data for Programming - High precision Sun and Moon data in different formats for programming

Chinese Calendar Reform History - The major events in the Chinese Calendar Reform History

Chinese 10 Thousand Year Chinese Lunar Calendar - How to read 10,000-Year Chinese Lunar Calendar

Sample Visual Basic Programs - Chinese Calendar conversion and western zodiac calculation

Chinese Lunar Calendar CD - Complete Sun and Moon astronomical data and Visual Basic source codes

Chinese Lunar Calendar CD

Frequently Asked Questions and Related Links

  © 2001-