I'd choose the U.S., Mexico, Italy, and... maybe Japan. I'd probably go with Mexico and Japan for spring and summer (possibly reversed), Italy in the fall, and the U.S. during winter.

Of course, I could really complicate that question by giving southern hemisphere countries as well, since the seasons occur at different times there. That would almost be cruel, though, wouldn't it?

What would you do if your state/city/province/etc. decided to secede from your country of residence?