中历及二十四节气时刻计算

The Twenty-four Solar Terms of the Chinese Calendar and the Calculation for Them

与农业生产紧密联系的二十四节气是中历的重要组成部分。它由大阳位置决定，使中历具有很强的阳历性质。近年国内出版的各种民用历书给出的节气时刻不同，引起读者不解。我们对此作了分析，同时介绍了计算二十四节气的方法并给出了近似计算公式。

Twenty-four solar terms (Qi) closely related to the agricultural production is an important component part of the Chinese calendar, and determined by the position of the Sun. It enables the Chinese calendar to have strong characteristics of the solar calendar. Some differences between the times of the same solar terms appear in various civil almanacs published in China recently, and confuse the readers. We analyse the cause of it here and give the method and approximate formulas about the calculation of the twenty-four solar terms.