New Grepolis servers, from what I've seen, mostly open around 11:00 ~ 13:00 server time, although Alpha was a bit earlier. You shouldn't ask for an exact time, as there always might be some complications, and we all know what happens if the moderators aren't opening a world at the
exact time we want it to: Shouting, crying and whining on the fora, because it sure is 5 precious minutes of gametime we'd miss
Patience is a virtue, and I think some peope need to sit back a bit and wait for the server to open; if you're a true 'pro' player, missing those first 5 minutes of the server because you 'have to switch all the time' (You can open up a 2nd tab..?), won't ruin your server.