Many of the larger IT orgs I know do releases on Tuesday - because nobody wants to deal with crap on the weekends. Everyone is around, and the system is actuall

Many of the larger IT orgs I know do releases on Tuesday - because nobody wants to deal with crap on the weekends. Everyone is around, and the system is actually being used. This kind of deployment also brings more discipline to the process, because you have to do the switchover when users are actually using the system. It means people are a lot more conscientious about making sure their plans actually work. We try to push on Monday afternoons, but it generally turns into Monday night. At some point your app doesn't/can't really have downtime, which is also a factor.