Does the old man mean that there is one more day in the full moon for boys and one less day for girls?

1 is a theory that it is difficult for boys to raise, and the observation period is two days longer. 2. Tell accurate information to others. When entertaining relatives and friends, one day is a boy and the other day is a girl, which saves the trouble of telling them one by one. In the past, people liked men better, so they celebrated for two more days. Later, in order to save trouble, people agreed to become a custom.