This is done in astronomy, with the help of the Julian day. 天文学上就是借助儒略日来算的。
The JewishToJD () function converts a Jewish calendar date to a Julian day count. 函数的作用是:将犹太历转为儒略日计数。
To make preparation for the future research work, a preliminary coordinate translation formula is deduced according to a Julian Day(JD) astronomical calculation system. 根据儒略日天文计算体系得出初步坐标转换公式,并为今后的研究工作做准备。
This Julian calendar added an extra day every four years to account for the quarter day. 这个儒略历每四年多加一天以计入那四分之一天。