The office I've been working in has had casual Fridays for the summer... but they ended with Labor Day, and no one conveyed this information to me. So I showed up dressed more or less the way I have every Friday since I started there. As soon as I walked into my work area this morning I knew something was up: the guy at the next desk was wearing a white dress shirt and black pants. He's not moonlighting as a waiter, so I thought it was unusual he'd be dressed that way on a Friday.
Eventually I noticed that other people were dressed the way they are during the rest of the work week. I briefly contemplated going over to the nearby Gap or EMS store to acquire some pants, but I decided it's not my fault that because I'm a temp, I'm not on the distribution list for any of the office-related stuff. It was a little awkward, but I got over it.