Three. Just three. Give each one a date, a person in charge and a short list — that's what turns a nice idea into a tradition. A child can be in charge; that's how they come to own it.
If something gets missed, move it. Don't drop it. A tradition that happens a week late is still a tradition.
Things we'd love to do before New Year's. Not a to-do list — a some-of-these list. Check off what happens and don't count what doesn't.
One tiny tradition a day, December 1–25. Each takes five minutes or less and costs nothing. Tap any line to change it to your family's version. Skip a day and the next one still works.
Same questions, every year. Write down exactly what they say. The app keeps each child's answers by year, so next December you'll see last year's answer right under each question.
For January, with coffee. Five minutes after the decorations come down. Dropping a tradition that stopped working isn't failing — it makes room for one that works.