In Norway, Christmas is called "jul" or "jule". The word "jul" means "Yule" in Old Norse and refers to the winter solstice, which is the shortest day of the year and the celebration that marks the beginning of the holiday season in many cultures. The word "jule" is derived from the Old Norse word "jól", which means "festival". So, the holiday is called "jul" in Norway because it is a celebration of the winter solstice and the start of the festive season.