Saint Lucia Day in Stockholm tomorrow.

It is St. Lucia day in Sweden tomorrow. What should I expect?

Here are some clues:  Early in the morning,
It has become tradition to surprise the Nobel Prize winners early in the morning when they are still in bed at their hotel, with a singing Lucia procession. One year though, a winner got really angry and upset, so since then they all get to know about it in advance... 

Late at night there's a dinner and a ball at Stockholm University, and, apparently, induction into the Order of the Frog

Perhaps there will be dancing at the Ball: Here's a story from an English language Swedish newspaper, interviewing one of the many student volunteers who are taking excellent care of us this week.

"When asked which of the recipients she would like to dance with, she smiles and answers “Alvin E. Roth.”
"He is the winner of the Nobel Prize in Economics.
"“He seems really laidback. Today, at the rehearsal, he showed up in torn jeans and a knitted cardigan. So, of the winners, I would actually like to dance with him the most.”
"If Dalman doesn’t get to dance with him tonight, she will get a second chance on Thursday.
"It may mark the end of her Nobel duties, but once she is done organizing the unofficial end of the Nobel Week, the Lucia Ball, she might end up taking a twirl with her favourite laureate.
"One winner always attends the event, and this year it's a Alvin E. Roth who will attend.
"So, that’s lucky."