At lunchtime today, I took a walk down to the post office. I think it's just a little under a mile, not sure. Anyway, I hadn't been there in a while; and when I got there, I found that they'd moved recently (but a sign on the door helpfully gave the new address – a few blocks away – and directions). So, I walked to the new location, got there, and only then remembered that today was a holiday (to some; I was at work) because the place was closed. Oops.