The eleventh day of the first lunar month is also called "Son-in-law Day", and this day is a festival for every father-in-law to invite his son-in-law, and this festival is also called Zigu Day. The eleventh day of the first lunar month of the new year is "Son-in-law Day", and it is the day when father-in-law invites his son-in-law to a banquet.

There is still a lot of food left over from the celebration of "God's Birthday" on the ninth day of the lunar month, so the parents don't have to spend any money to treat their son-in-law and daughter. In fact, the folk song is called "Invite the son-in-law on the eleventh day."

"Son-in-law Day" has a very historical origin. In ancient times, the leftover food to celebrate the birthday of "God" was not finished on the ninth day of the first lunar month, so these delicacies that had been sacrificed to the gods were used to entertain the daughter and son-in-law as the second day of the Lunar New Year.

A gift for a daughter when she returns home. On the eleventh day of the first lunar month, when a daughter and her son-in-law rush back to their parents' home, their elder brother or younger brother must go out to greet them in advance to show their family's respect and attention to the son-in-law. This is commonly known as the eleventh day of the first lunar month.

Please refer to Zigu's day (in some places it is the fourteenth day of the first lunar month). The earliest document recording Zigu is "Yiyuan" written by Liu Jingshu of the Southern Song Dynasty. It is roughly said that Zigu was a concubine who was jealous of his original wife and died on the tenth day of the first lunar month.

Wu was killed in the toilet on this day. The Emperor of Heaven took pity on her and made her the toilet god. However, the people worshiped Zigu not because she was the toilet god, but because Zigu represented the persecuted women, she was worshiped by women and regarded as her.

The protector of weak women comes to worship.