历法lìfǎ用年、月、日计算时间的方法。主要分为阳历、阴历和阴阳历三类。具体的历法还包括纪年的方法。{calendric system of determining the beginning, length and divisions of a year and for arranging the year into days, weeks and months. There are mainly three kinds: the solar calendar, the lunar calendar and the lunisolar calendar. Specific methods also include annals, chronicles, etc.}