《吕氏春秋·十二纪》包含有“立春”、“东风解冻”、“候雁北”、“桃李华”、“蟋蟀居宇”、“地始冻”等节气和物候的内容。我国气象界在研究节气和物候史时,往往都要提到它。因为除《夏小正》等少数几篇东西外,几乎所有系统地谈节气和物候的古书,例如《礼记·月令》、《逸周书》的《周月解》和《时训解》、《准南子》的《时则训》和《天文训》等,都是秦代以后 “Lu Shi Chun Qiu Shi Ji” contains the “Spring”, “Dongfeng thaw”, “Hou Yan North”, “Peach Lihua”, “CricketHe Yu”, “ground to freeze” and other solar terms and phenology content. China’s meteorological community in the study of solar terms and phenology history, they often have to mention it. Almost all the ancient books that systematically talked about solar terms and phonetics, such as the Book of Rites, the Lunar Months of Yizhoushu, and the Lunjuan Solutions, except for a few articles such as Xia Xiaosheng, “Nanking” “when the training” and “astronomical training” and so on, are after the Qin Dynasty