Ok, so what about this:
Tuesday (US)
London: 4 am wednesday
Chicago: 10 pm
LA: 8 pm
Sydney: 2 pm wednesday
(not considering summer time etc.)
Saturday (Europe/US)
London: 8 pm
Chicago: 2 pm
LA: 11 am
Sydney: 6 am sunday
Sunday (Europe/Australia)
London: 11 am
Chicago: 5 am
LA: 3 am
Sydney: 9 pm
You can edit these / add more times, but I thought I'd just make a start..
Not sure if all the times are correct though
