The trouble is that time zones around the world range one hell of a lot... Two hours ahead here, two hours ahead there, New Zealand is 12 hours time difference from England - you don't get much different to that!

I guess it depends on the demographics of where most people are from... But then balancing that with when people want to chat. For example, I quite like chatting late at night (for me) which means I can catch people who are up fairly early (for them). When I visited the US... That was when I realized just how inconvenient the 'peak posting hours' REALLY were for me lol.

That being said, I hope you figure out something for a time that is convenient for you to chat :-)