Usually on this day, young women will put on beautiful clothes and come to the river to play. Du Fu, a poet in the Tang Dynasty, wrote a poem to describe the scene at that time. "On March 3rd, it was a sunny day, and many beautiful women were walking along the Chang 'an River.".
The topic says that the sixth day of June is not girls' day. In ancient China, this day was usually called Auntie's Day, or Mother's Day. It is generally called "the sun". There is a saying called "On June 6th, the girl ate a knife of meat". Generally, on the sixth day of June, the married daughter will go to the butcher shop to buy a knife of meat and send it back to her family.
According to legend, during the Spring and Autumn Period, Prime Minister Hu Yan was in a high position. His birthday is June 6th. Every time he was born, Wu Wen of the Manchu Dynasty would come to celebrate his birthday. Hu Yan's in-laws don't like his behavior and are very angry with him. His son-in-law bears a grudge against him and wants to get back at him. His daughter knew about it and told him in advance. This year, Hu Yan went out to distribute food and met the people. Many folk people follow this behavior and take their daughters home on this day. Since then, the sixth day of June has become Mother's Day.
In ancient times, the 7th of July mentioned in the title was usually called Chinese Valentine's Day, or Jojo's Day. There is indeed a folk saying about Daughter's Day. The origin of this day is the famous "Cowherd and Weaver Girl", and now many young people will regard this day as Valentine's Day.
Therefore, to sum up, Daughter's Day in the Middle Ages was generally on March 3rd or July 7th, and June 6th was generally called Mother's Day.