"Don't get married in the first month" is a rural saying, which means it is not appropriate to get married next month. Getting married in the first month will lead to bad luck and fortune in the future. Of course, some people say that getting married in the first month is a "ghost marriage", which is the day when ghosts get married. Most people choose to get married at this time, which will lead to unhappy marriage in the future. But "the twelfth lunar month can't be fixed" is because in ancient times, people thought that there were gods everywhere in the twelfth lunar month, so they should be cautious in their words and deeds, be humble and not argue with others. If there is an argument, people will. Therefore, the implication of betrothal in the twelfth lunar month is that it is unlucky to fall behind others in the future. The twelfth lunar month is an "ugly" month, which means that this daughter-in-law can bring "ugly" things to her husband's family after going through the door. It's easy to make mistakes when you annoy your in-laws, which leads to family discord.
On the other hand, there are more important things to do in June and December. Engagement is too urgent at this time. There are inevitably other reasons. If you are not in a hurry to get married in these two months, both sides will calm down and think clearly. Take it easy. In addition, rural people used to be superstitious, and the first month was the beginning of a year. Marrying a daughter-in-law at this time shows that the daughter-in-law likes to show off. In addition, there is a "wonderful story", that is, if the groom is still very young, he can't cross the etiquette on the day he enters the bridal chamber. Otherwise, if the bride is pregnant on the wedding night, the child born will be called "Maimenzi", which is very unlucky.