@Walter Hinteler,
Actually, parts of Poland and Germany (and Russia) can be said to be situated in Northern Europe (geographically, and due to membership in international organisations). But generally it's just the Scandinavian and Baltic countries.
Of course, everyone can act like Foofie, and use historic terms for geographic names today.
But those, who actually rely on information, are glad that there's a standardisation of the nomenclature.
"Central and Eastern Europe", abbreviated CEE, was used a generic term for countries in Central Europe, Southeast Europe and Eastern Europe, usually meaning former communist states in Europe. (Austria was interestingly a CEE country as well.)
The term
Central and Eastern Europe (with its abbreviation CEE) has by now displaced the alternative term "East-Central Europe".
Northern Europe is still the same as it has been before the falling of the "Iron Curtain".