Three years ago, I went to Sweden with my then-girlfriend (now-wife), to meet her family and celebrate my first Christmas. As an only partially lapsed Jew, I was not well-versed in Christmas traditions, and I was completely ignorant of Swedish customs and culture. So I was prepared for surprises. I was not prepared for this: Every year on Dec. 24 at 3 p.m., half of Sweden sits down in front of the