I always wonder how someone even manages to play a game for days at a time, being Asian really has to suck so fucking bad that you just can't manage to pull yourself away from the computer.
To answer your question is it depends on whether it is online or offline, offline you're good to go as long as you like. If it's online then you must consult your time zone map to find out when the Slavs/Jeets/Chinese will be online relative to you, avoid these hours at all costs.