So, how often do the servers need maintenance?

DrunkCajun, on Sep 17 2011 - 08:04, said: Been playing for less than a week, and this seems like the third time I've been kicked off the server for "scheduled maintenance". This last time being midnight MST/2 am EST on a Friday night. What gives? I poked around the website and forums and can't find any advance notice or dev posts about these, but maybe I'm missing it? If anyone could point me in the right direction I'd appreciate it.