公历转农历(1700-3100)
农历是中国最常用的日历之一，具有悠久的历史。 但是农历是非常复杂的，它的大小月及闰月几乎没有任何规律。 本算法解决了 1700-3100 一千年多年公历转农历的问题。
Lunar Calendar
The lunar calendar is one of the most commonly used calendars in China and has a long history. But the lunar calendar is very complex, and its size and leap month almost no law. This algorithm solves the problem of the lunar calendar of 1700-3100 years.