Tibetan astronomy and calendar are an important part of the Tibetan "Ten Ming" culture. It is widely spread in Tibetan areas and has a history of more than 2,000 years. Tibetan astronomy and calendar are a unique discipline. It consists of many branches such as primitive astronomy and calendar, five elements divination, time wheel calendar, Han calendar instant calendar, divination, geomancy, etc. The relevant knowledge and practice include not only the calculation of the motion values of the five planets, the setting of leap months and days of overlap, and the prediction of solar and lunar eclipses, but also the medium- and long-term weather forecasts, and the calculation of suitable farming and animal husbandry opportunities, phenology, festivals, and human pulse phase change cycles in various places based on the principles of astronomy and calendar. The Tibetan calendar compiled by the Institute of Astronomy and Calendar of Tibetan Hospital every year is a special form of expression of the research results of astronomy and calendar. Tibetan astronomy and calendar are precious wealth created by the Tibetan people in long-term practice. For thousands of years, they have been playing a guiding role in the production and life of the Tibetan people. The Tibetan calendar has distinct characteristics, is unique among various calendars in the world, and occupies a very important position. The Tibetan meteorological calendar compiled based on the principles of Tibetan astronomy and calendar still plays an important role in guiding agricultural and animal husbandry production and forecasting weather. It is popular in Tibetan areas of Tibet, Qinghai, Gansu, Sichuan, Yunnan and other provinces, as well as in neighboring countries such as Bhutan, India and Nepal, and is deeply welcomed by the majority of farmers and herdsmen. (No pictures yet, welcome to provide.) (No pictures yet, welcome to provide.)