No, it also applies to residents only. Enjoy your stay in Hamburg, it's a great city for a visit especially with dogs!

It only applies to Hamburg residents. Note that you are still required to observe all other Hamburg regulations concerning dogs; mainly: keep your dog on a leash outside of designated dog zones (it's possible and common to get an exemption, but it requires you to pass a test and pay a fee - not something that's worth it or feasible for only a week), and pick up after your dog.

Not sure if you're joking or just having a slow day, but neither the length of a day nor the length of a year are arbitrary. One is the length of a revolution of the earth around its own axis, the other is the time the earth takes to complete a full run around the sun. Those two aren't fully in sync, and to line them up would require a major feat of astroengineering. Given sufficient advances in science, we might get there in a few millennia, if we're still around by then, but until then leap years are here to stay.

I read an article about that. IIRC it's mainly because there is only minimal bloodflow in your teeth - barely enough to supply it with nutrients (and still not enough you should skip external flouride etc.).

DJ Krush for some instrumental hip hop/trip hop.

Can't speak for the US, but here in Germany there often aren't 12 monthly salaries to a year. Many people get a Christmas bonus and/or a summer bonus, but just as many don't. Personally, I get paid about 13 1/4 monthly salaries a year, so telling you my yearly salary would be more accurate than the monthly amount.

Ach was, 'Kaiserreich' ist eigentlich kein besonders komplizierter Begriff.