Chinese Lunar Calendar

Chinese Lunar Calendar - Programming and Astronomical Data

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

Introduction

Many people are looking for the formula to convert from the Gregorian Calendar to Chinese Lunar Calendar. Actually, there is no formula for the Chinese Lunar Calendar Conversion to satisfy me during my research from 1988 to 1992. Because the motion and rotation of moon are uneven, unstable and wobbling, it's very hard to have a accurate formula for Chinese Lunar Calendar over any century. Any straight-forward formula available today only give 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 www.chineseastrologyonline.com, 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

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

Online Chinese Lunar Calendar Conversion
Chinese Lunar Calendar CD
Frequently Asked Questions and Related Links

Introduction in Traditional Chinese or Simplified Chinese