Debenhams: Festive snowy Christmas

What are the things that always identical and linked with Christmas celebrations? The answer might be Christmas tree, colorful gift boxes, and the white snows. These things can be found instantly in the Debenhams window displays at Senayan City, Jakarta. They look so festive compared to other boutiques that already decorated with Christmas theme but I am confused with the concept. The example is the snow properties that are everywhere even in the scene of a dining table. In reality it would be very impossible to have a lunch or dinner outdoor in the snowy day.