Shao Dong had single-handedly created this special day. Later on, when the internet developed even more, many people even called Mu Jingzhe their future mother-in-law.
Because Little Bei was the nation's daughter, Mu Jingzhe was called the nation's mother for a long time. This was because, like Shao Dong, Little Bei always talked about her mother.
Also, because of Shao Xi, Shao Nan, and Xiao Wu, the nation's mother lived up to her name.
As Shao Dong and Shao Xi grew up, they became increasingly good-looking. Thus, Mu Jingzhe became the mother-in-law of the whole country.
This would all happen later. Mu Jingzhe didn't expect the decision that Shao Dong made on her birthday to affect the future so much, and in the near future, it would even create this world's 11/11 in advance.
In the modern era, 11/11 was initially Singles Day, but later on, it became a shopping festival, and no one remembered it as Singles Day anymore.