Find the origin of the Spring Festival in English, about 50 words, urgently needed.

The Spring Festival is the first year of the lunar calendar and an ancient traditional festival in China. In ancient times, the year was not the 29th or 30th of the twelfth lunar month. But in the period of the Republic of China, the solar calendar was changed to the Spring Festival.

Lunar New Year is the first day of the lunar calendar and an ancient traditional festival in China. In ancient times, the year was not on the 29th or 30th of the twelfth lunar month. In the Republic of China, the solar calendar was changed to "Spring Festival".

The concept of "sui" in the extended materials comes from the ancient calendar, and ancient books such as Pangu Wang Biao and San Tong Ming Hui all contain: "The Emperor of Heaven began to establish the name of the main branch to determine the age."

In the emperor's time, a year was expressed by "year", which was also called "country" and "Tai Sui". The "Twelve Earthly Branches" used to say: Tai Sui was taken in Yin, Khan Mao, strong in Chen, desolate in Si, depressed in the afternoon, negotiation failed, bad news was applied, bad news was especially, castration was especially, and a big mistake was made in Hai.