Christmas has taken over Aalborg since October - as neither Halloween nor Thanksgiving really exist here, the Danes start decorating very early. The streets are all decked out with Christmas trees and lights, and one of the biggest Christmas traditions is the town's outdoor Christmas market. Almost every town (it seems) has their own market that is set up through the holiday season (Advent through Christmas). There are plenty of stalls full of people selling food and Christmas presents, and there are even rides for the kids.
In addition to the town market, there is also an indoor Christmas market in Nordkraft, the cultural building about two minutes from our apartment (it houses an indie movie theater, restaurants, a climbing wall, and the tourist center, among other things - be warned, though, the Indian restaurant there is terrible!). The indoor market is infinitely better than the outdoor one - we got some delicious apple cider and bacon there a few weeks ago, but have yet to buy anything from the outdoor one. One of the best parts of the indoor market has got to be the man riding around on an absurd bicycle, though:
Lastly, one of Aalborg's best Christmas festivities is the train (actually a bus that is decorated to look like a train) that runs around the city during the season. I've never seen anyone but children riding, but it looks like a good way to get around the city...