There is also that you can more or less time some of the raids by a physical clock, as they tend to use similar times from one day to the next.

Then again, I have experienced that when a friend and I were both playing the game, each on their own world and computer while talking on handsfree, we had raids at the same time.

So, if you do not wish to use console, all you need to do is time when they happen so that you can be away from your base on the following physical days. This do not cover one specific raid that triggers after killing the third boss, however.