It used to be the same for USA and Europe, but one day George W. Bush decided to move US's changeover dates a month earlier in Spring, and a month later in the Fall, messing a lot of things up. Thanks, Dubya!

And just for fun the EU bigwigs had some sort of vote recently that resulted in saying each member country is free to choose whether to keep or abandon DST. What the hell boneheaded move is that?! Why even have a vote, it seems like they thought that would gain them popularity with the public.