I was chatting about the logistics of the postal service with a friend. In Denmark, if I put a letter in the box before 18:00, I am pretty sure it will arrive anywhere else in Denmark the following morning. We were trying to consider the logistics of getting that level of service across the EU.
So here's a question. In the US, (an area of comprobable size, admittedly with less people and so addresses, but anyway), if you post a letter today, does it get to anywhere in the US tomorrow? If not, how long in general term?