Is there an eve festival?

No, there is only the Tanabata Festival.

The Tanabata Festival is not only a festival for worshipping the Seven Sisters, but also a festival of love. It is a comprehensive festival with the theme of praying for blessings, begging for coincidences, and love, with women as the main body, based on the "Cowherd and Weaving Maiden" folklore as a carrier. The "Cowherd and Weaving Maiden" of Tanabata originates from people's worship of natural celestial phenomena. In ancient times, people corresponded the astronomical star area with the geographic area, and this correspondence was called "star dividing" in terms of astronomy and "field dividing" in terms of geography. This correspondence is known as "the division of stars" for astronomy and "the division of fields" for geography. According to legend, every year on the seventh day of the seventh month, the Cowherd and the Weaving Maiden will meet at the Magpie Bridge in the sky.

The Tanabata Festival began in ancient times, popularized in the Western Han Dynasty, and flourished in the Song Dynasty. In ancient times, Tanabata was an exclusive festival for beautiful women. Among the many folklore of Tanabata, some of them gradually disappeared, but there are still quite a few of them that have been continued by the people. The Tanabata Festival originated in China, and is also celebrated in some Asian countries influenced by Chinese culture, such as Japan, the Korean Peninsula, Vietnam, etc. On May 20, 2006, the Tanabata Festival was listed in the first batch of national intangible cultural heritage by the State Council of the People's Republic of China*** and the State Council of the People's Republic of China.