In Yi areas, people usually celebrate the Year of the Yi people around October of the lunar calendar. Yi people's year is called "Kus" in Yi language, "Ku" means year, and "history" means New Year.
Liangshan Yi Year is mainly used in Butuo, Meigu, Zhaojue, Ganluo, Xide and other 17 counties (cities), among which Zhaojue, Meigu, Butuo and Xide are representative and characteristic.
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Before the founding of New China, the Yi people had many branches due to different regions and dialects, and had many different appellations and self-descriptions. The main appellations are Yi, Hei Yi, Bai Yi, Hong Yi, Gan Yi, Huayao and Micha.
Among the main self-names, Zhaotong, Wuding, Luquan, Maitreya and Shiping in Yunnan, and the Yi people in Liangshan and Xiaoliangshan in Sichuan call themselves Sunuo, Nasu and Niesu, accounting for about 1/2 of the total population. Yi people in Ailao Mountain, Wuliangshan, Kaiyuan, Wenshan and Maguan in Yunnan call themselves Misa (Po), Lasu (Po), Prapo and Nipu. The Yi people in Guizhou call themselves Na, Nuo and Nie.
After the founding of New China, after national identification and in accordance with the consent of the broad masses of Yi people, Ding Yi's "Yi" was adopted as the unified name of the whole country.