一个系统的公历与农历的对比计算表格，输入公历可以得出农历，输入农历能得出公历。里面有我自己定义的多个自定义辅助函数。-A system of the Gregorian calendar and lunar contrast form, enter the Gregorian calendar can come to the Lunar New Year, the input the Lunar can come Gregorian calendar. There are multiple custom helper functions defined myself.