‘Day in the future’ family activity

At the live workshop, we talked about scheduling a date with our families to create that “day in the future.“ I am struggling to figure out what to do. The day I envisioned 10 years in the future at the workshop was Christmas Eve and that is hard to recreate on any other day. And what do we do if our children are bickering and fighting the entire time on this “day in the future “activity?