I'm glad you asked, that's a very important part of Christmas! Here are some ideas for what to write in a Christmas card:
1. "Wishing you a happy and joyous holiday season."
2. "May the spirit of Christmas bring you joy and peace."
3. "Merry Christmas! I'm thinking of you and hope you have a wonderful day."
4. "May the holiday season be filled with love and happiness for you and your family."
5. "Warm wishes for a wonderful Christmas."