In the feudal dynasty, it was also called "Imperial Book" because it was promulgated by the emperor. As early as ancient times, our country had an official position dedicated to observing astronomical phenomena and calculating calendars. In the Qin and Han Dynasties, there was a Taishi Order, in the Tang Dynasty, there was a Taishi Bureau, in the Song and Yuan Dynasties, there was a Sitian Supervisor, and it was renamed Qin Tian Supervisor in the Ming and Qing Dynasties. From the second year to the seventh year of the Ming Dynasty, the Calendar Bureau under the leadership of Xu Guangqi hired professionals to compile the calendar of Chongzhen. In the early Qing dynasty, missionaries presented the almanac of Chongzhen to the Qing emperor and renamed it New Works of Western Calendar. After a long time, studying and studying western astronomy became the main work of astronomers at that time, which had a great influence on the development of astronomy in China.
China's earliest almanac was framed into a shaft and written with a brush. About the ninth year of the Tang Dynasty, almanac carved with wooden boards appeared. Up to now, almanac can't be compared with the past almanac. It is presented to people with a brand-new look. As far as its types are concerned, there are many kinds of calendars, including annual calendar, monthly calendar, lunar calendar, pregnancy calendar, desk calendar, wall calendar and perpetual calendar. With the continuous progress of social information, technology and culture, its content is all-encompassing and colorful; The design forms are not only diverse, but also full of cultural and artistic flavor. All kinds of almanac and almanac with celebrity calligraphy, poems and paintings are often a kind of collection, so now more and more people attach importance to collecting all kinds of almanac and almanac.