A merry christmas to all of you as well.
In both Denmark and Sweden (where I am at christmas this year) the 24th is the main day.
In my family we've usually been celebrating christmas eve in Swedish manner (a major christmas lunch starting with fish (mainly herring marinated in different ways, but a lot of people also have salmon) and then different kinds of meat (both cold and heated) with a ham as the main dish. after the lunch we watch the disney "christmas special" (I believe that's mainly a nordic thing). After that it's presents and lots of different christmas cake.
Usually our family eats a Danish Christmas dinner on christmas day consisting of duck with two types of potatoes (usually boiled and a kind of sugar coated potatoes), gravy and pickled red cabbage. Others eat roast pork. As a dessert we eat risalamande which is cold rice pudding mixed with lightly whipped cream, vanilla, sugar and chopped almonds. This is served with a warm cherry sauce. A tradition is hiding one whole almond in the mix. The person getting this one wins a present.
Sadly we won't do this tomorrow, but we will eat duck on the 30th where we'll have a "second christmas" with presents from Denmark.
The 26th is very traditional when it comes to sports in Sweden, with both bandy and Ice Hockey being big events.
Denmark doesn't have any real traditional things, though the women's handball Cup ends between Christmas and New Year.