1 month 2 1 day is a good day?

According to the solar calendar, the 21st day of the first month is an auspicious day.

New Year's Day is "Son-in-law's Day", and it is the day when the father-in-law fetes his son-in-law.

There is a lot of food left over from celebrating Father's Day on the ninth day. I ate all day on the tenth day, and there was a lot left. It won't be wasted to entertain the son-in-law. Therefore, the bride's family doesn't have to spend money to buy food, so she uses these leftovers to entertain her son-in-law and daughter, and at the same time, it is also to promote the harmonious development of the in-laws relationship. Therefore, this custom has been preserved in the Spring Festival, an important festival. In ancient times, they were called eleven sons-in-law.