The Nobel Price award ceremony is scheduled for Sunday in Stockholm. The traffic situation will be very difficult during the day and recommendation is to only use subway or walking through the city.
The Christmas market in Old Town is usually crowded during weekends, sometimes so much that Stockholm looks more like Tokyo than Stockholm. We recommend you to visit the Christmas market during weekdays. It’s not a pleasant place when you hardly can move and have to wait in long lines to buy your Christmas presents and souvenirs from Stockholm.