What is the legendary festival of Cowherd and Weaver Girl?

Valentine's Day in China is one of the traditional festivals in China. "Evening" means night, and Tanabata is the night of the seventh day of the seventh lunar month. Valentine's Day in China originated from the legend of Cowherd and Weaver Girl. Cowherd is a young man herding cattle, and Weaver Girl is a fairy girl in the sky. The Weaver Girl felt that there was no freedom in heaven and came to earth. With the help of the old cow, the cowherd and the weaver girl met, fell in love and got married soon, and gave birth to a man and a woman. But one day, the Queen Mother snatched the Weaver Girl away. When Cowherd and his two children were chasing Weaver Maid in the sky, the Queen Mother drew a galaxy with a hairpin on her head. This galaxy is long and wide, and the cowherd can't get through it, so it separates. The Queen Mother only allows the Cowherd and the Weaver Girl to meet once a year on the seventh day of July. Every night on the seventh day of July, groups of magpies fly to the bridge between the Cowherd and the Weaver Girl, so that they can meet on the bridge. This is the origin of Valentine's Day in China. Valentine's Day in China is also called Daughter's Day and Begging for Clevership Day. In northern Chinese mainland, there is a custom in some rural areas: on the seventh day of July, melons and fruits are put on the table to beg for the help of the Weaver Girl. In other words, I hope the Weaver Girl can pass on her skills to the world. There is also a folk custom, that is, on the seventh day of July, the newly-married daughter is taken back to her family. People are afraid that the Queen Mother will force the newlyweds to separate after seeing their happy life, so they use the method of temporary separation to avoid the Queen Mother in order to reunite for a long time. So this day is also called avoiding festivals. Because July is the rainy season, it often rains on July 7th. People say that it is the tears shed by the cowherd and the weaver girl when they meet. It is also said that on this day, if someone sits under the grape trellis, they can peek at the meeting of the cowherd and the weaver girl and hear their conversation.