balloons

I am currently trying to think of reasons that the large office tower across the street from me would have multiple floors decked with red, white and green balloons. They are attached to cubicle walls, filing cabinets and desks. I doubt it is for one person's birthday as a few floors have it. It could be for an Italy festival they are having, but I see no corresponding banners. And a month ago there was a similar balloon situation but they were all pink. This is most curious.