《日书》是古代“日者”选择时日、占断吉凶的实用手册,涉及社会下层民众日常生活的各个方面,内含丰富的民俗学素材。考古发现的《日书》已约有10余种（批）,时代从战国中晚期到东汉末年。目前已经发表释文的只有湖北江陵九店战国晚期楚墓（M56）出土的楚日书①（简称九简）,甘肃天水放 The “day book” is a practical handbook of the ancient “day” selection of the time and the good and bad things, involving all aspects of daily life of the people in the lower classes of society, which contains a wealth of folklore material. Archeological discovery of the “day book” has about more than 10 species (batch), the era from the late Warring States period to the Eastern Han Dynasty. At present, only the Chu language book (abbreviated as Jiujian) unearthed from the Chu Tomb (M56) of the late Warring States Period in the nine stores of Jiangling in Hubei Province has been published. Tianshui, Gansu Province