“凡史之所记,以表年以系事。”时间是记述历史不可缺少的一个重要的因素。那么,古人是如何记年、记月、记日、记时的呢? 中国古代记年的方法有帝王记年法、年号记年法、干支记年法、十二生肖记年法和星岁记年法等。帝王记年法即以帝王在位的年数记年,如公元前七六九年记为周平王二年,公元前七六八年记为周平王三年等。年号记年法即以帝王在位时的年号记年,如公元前一三九年记为汉武帝建元二年,公元前一三八年记为汉武 “Where history records, in order to Chronicle. ” Time is an indispensable historical account of an important factor. Then, how does the ancients remember the chronology, remembering the moon, remembering the sun and remembering the time? The methods of ancient Chinese chronology include the method of the diary, the chronology, the chronology, the chronology and the zodiac Annals and other methods. Remembrance of the king that the year of reign of the emperors in the number of years, such as BC in six or nine years as Zhou Ping Wang two years, in seven or eight BC recorded as Zhou Ping Wang Sannian and so on. Chronological Year of the Law that year when the emperors reign Chronology, such as the BC one year BC written for the Han Emperor Jian Yuan two years, one hundred thirty-eight BC recorded as Han Wu