Holiday spirit can be fun, but can also go overboard or be perceived as inappropriate. In extreme cases, depending on the opinion of a viewer, it may be construed as insensitively unprofessional.
Like those neighbors (and every neighborhood seems to have one) that can't let a holiday go by without doing the whole nine yards in turning their house into a road side spectacle, some nurses or nursing units lose all perspective and turn their place of work into a holiday extravaganza. I've seen these things backfire disastrously, but one especially sticks in my mind.
On one particular coronary unit infected with an annual Christmas spirit, they won every "best decorated unit" award for I don't know how many years. They had wire formed reindeer festooned in lights hanging from the ceiling, with sparking ornaments and tinsel accents on the light fixtures. Christmas lights raced around the patient hallway handrails and the doors were also covered in shiny wrapping paper, punctuated with giant ribboned bows or pine wreaths in an imitation of an over sized gift box. If one didn't know it, you would have thought that you were walking through a department store. To add to the "atmosphere" the head of cardiac surgery took to organizing an annual caroling session where he and many members of the hospital's executive administration went floor to floor singing Christmas favorites in the hospital halls on the eve before Christmas.
It all came to an end when they once arrived unannounced, and began singing "Joy to the World" down the hall while a code was going on. The relative of the dying patient, came out of the room and bluntly told them that they were the most insensitive idiots unworthy of their professions. He then requested that they please shut the hell up so that his mother can die in peace in quiet. Needless to say, all holiday frivolity came to a screeching halt after that year.
Thus, IMHO Christmas, Halloween or any other holiday, isn't my primary purpose on the job. So, I'll wear the same "costume" that I always wear; I'll dress as the nurse.