Some other things that many Finns do during Christmas (24th day):
On the morning, they eat rice porridge as mentioned above. Also some traditional programs, mainly aimed for children come from TV, cartoons, and most importantly "Santa Clauses hotline" which is broadcasted live. Children make calls to the Santa Claus, sing for him, express merry christmas etc.
At midday, "christmas peace" is declared in the old capital of Finland, Turku. Very popular tradition, hundreds of years old, gets broadcasted on TV. Was forced to watch it every single christmas. Don't really watch it anymore.
After that many go to "christmas sauna".
As the evening approaches comes the main feast. Christmas ham, potato/carrot/swede casserole, fish and fish roe among other things, but there is a lot of variation in some of these, for example, some eat lutefish.
There are some other things as well like christmas-service at church but not that many go to church anymore.
Is birth of the Jesus celebrated in your country? Like comment and share below!!