Marriage is a happy and joyful thing for lovers. After all, it is a major event in life. You can discuss it with your family. It is still quite traditional in China. People often check the almanac for things like marriage and choose an auspicious day to get married.
But I think getting married on Christmas is also a very romantic day. It is a very good idea to treat each other as a gift from heaven in winter. However, it is not satisfactory if the weather is a bit cold. You can give each other a gift first, as if it is your own private engagement. You can order a couple's letter necklace and wear it separately. Make vows to each other at Christmas. As for the wedding, you can discuss it slowly. If people are there and feelings are there, the wedding date is not a big problem.