It looks like you're new here. If you want to get involved, click one of these buttons!
Apparently there was some dinky update that no one cares about that they were going to do last night, but it got delayed. Now that US prime time has arrived, the update is ready, so they take the servers down for it. It's late night for Europe, but hardly ideal for them, either. On the other hand, this is the ideal maintenance time for people who live in the east Asia regions that are about to be region-blocked from accessing the game.
They've been doing a bunch of scheduled maintenance (as in, every few days or so) in the late morning in the US. That works fine for most US players, but that's early evening in Europe, so I'd imagine it doesn't work so well for them.
Is it really so hard to understand that you schedule maintenance for times when there will be relatively few players on, and not when there are predictably going to be lots of players on? Most other game companies seem to understand this, and Cryptic itself used to. What changed? Do all Perfect World games do this?