最近在学习GPS解算算法时需要在GPS时（GPS周和周内秒）和公历日期之间进行转换，于是就整理了一些时间转换的小程序。 本文介绍了GPS时、公历、儒略日（JD）、简化儒略日（MJD）之间的转换函数。(Recently, when you are learning the GPS algorithm, you need to convert between GPS (GPS weeks and weeks) and the calendar date, so you sort out some small programs that change over time. This paper introduces GPS, the Gregorian calendar, Julian day (JD), MJD (MJD) between the transfer function.)