The 26th of the twelfth lunar month is the first solar term after the winter solstice, which means that the climate is getting warmer and everything is beginning to sprout. It is a very good start. Choosing to get married on this day means that the marriage will be smooth and long, and it has always been considered an auspicious wedding day. Getting married on this day helps to avoid unhappy things such as marriage or divorce.
Solemnly declare: the answer is for reference only, please don't be blindly superstitious.