At school, there was an annual school disco and I'd be standing in my bedroom wondering what to wear for hours on end. Eventually I'd arrive at a decision that was just the most ridiculous costume you could have ever devised - I think it was probably knitted Christmas jumpers on top of buttoned-up white shirts.
Then, when I got in the military, I used to host - even in high school - I hosted the talent shows, and when I was in the military I would host all of our base Christmas parties and stuff.
Windows are as essential to office prestige as Christmas is to retailing.