I hustled into work this morning. It wasn't until after I had gotten there that I realized it was only 7, and that I'd arrived an hour early. Someone needs to disarm an alarm at that hour, but luckily a fellow employee was pulling in who had the code.
It's maybe the second or third time that's happened to me on this job. Interesting experience. Definitely better than getting it wrong in the other direction, from a continued employment perspective.