Question: what to do on christmas day vienna?
Answer: Take a photo at Belvedere. This is missed by most people, but an absolute must. ... 
Visit a Christmas market. ... 
Drink Weihnachtspunsch. ... 
Listen to an advent concert. ... 
View the lights on the Graben and Kärntner Straße. ... 
Take an evening trip around the Ring. ... 
Walk through the Rathauspark. ... 
Visit a roast chestnut stand.