Don't be superstitious about getting married, as long as two people have a good relationship! Our older generation got married in Tomb-Sweeping Day, and our generation got married on National Day! This is our custom here, but I think it's good to get married in Tomb-Sweeping Day, because everyone in Tomb-Sweeping Day is sweeping graves, so there is not so much pressure to get married at this time, and no one says anything! However, I think marriage depends on the feelings of two people. If the relationship between two people is not so good, I don't think we should get married at this time, because marriage is a very festive thing, and we can't ruin the festive atmosphere because of marriage! Therefore, I think we should be careful when getting married. If two people have a good relationship, I think we can get married in Tomb-Sweeping Day! I wish you a happy wedding! May you grow old together!