ekka: i know the northern hemisphere is asleep
Nope - the night wonders from East to West, in North and South alike. You have the same day&night times than certain parts of Russia. Remember the time zones along the lines of latitude?
Also, maintenance and update times are far off the CDP day steps - the former being about 12 am PST, the latter at UTC or Zulu time, formerly Greenwich Mean Time, usually 8 hours apart.
I leave the calculations for Australian times up to you, it's easier than from the antipode :)
But, if you always play on the same side of UTC and avoid the deep night in California, you will be as safe as possible concerning the CDP.
But remember: It's but a number, one of the least significant numbers of this site ;)
Happy hitting!