Brief itinerary

Day 1: Friday

Arrive Stockholm
Visit Christmas Market at Gamla Stan (The Old Town)
Visit the Ice Bar at Nordic Sea Hotel
Activities: Ice Bar
Accommodation: Stockholm, Hotel

Meals: None

Day 2: Saturday

Visit Skansen open-air museum & Christmas market
Sightseeing and/or shopping in Stockholm, including: Vasa Ship, ABBA museum etc.
Christmas buffet/Julbord cruise on board a historic boat through the archipelago

Accommodation: Stockholm, Hotel
Meals: Breakfast & Christmas buffet 
Activities: 3 hr boat trip, Skansen Christmas Market
Transport: underground/tram ticket to Skansen

Day 3: Sunday

Day trip using public transport from Stockholm to Sigtuna
Sigtuna historic village and Christmas market
Return Stockholm

Accommodation: Stockholm, Hotel
Meals: Breakfast
Transport: return bus/train ticket to Sigtuna
 (approx. 1 hr each way)

Day 4: Monday

Last minute shopping or visit one of Stockholm's museums
Trip ends
Accommodation: Stockholm, Hotel
Meals: Breakfast