I'm sure there will be plenty of Euros, just getting home from work, looking forward to getting some gaming done after the improvements in the lag problem who will pretty pissed off about this.
But then, when you have a global user base, when is a good time to take the game down for 6 hours? It'd be interesting to know the numbers of players over the different continents.
Think I'll go play Wurm for a bit, my deed needs some maintenance done anyway.