It's funny, because at my job there almost was no warning when we shut down. I was taking a half day because I was stressed as all hell, and decided to hang around for lunch with one of my co-workers. As I was literally leaving, somebody ran up to me and my coworker and said "You gotta get your stuff, we're closing the office!"
I did not take that half day. Got paid for the whole day, kept my time off, and was out the door within like half an hour with all my stuff.