[quote=@LupusIntus]
<Snipped quote by Caits>

Setting a time where you, the GM, will post and timeskip everyone at the same time really doesn't have anything to do with timezones as with enough warning (48-62 hours notice is plenty) everyone should have wrapped/be-wrapping their stuff up anyway. 

With this many people it would likely be very risky waiting for every single person to finish their conversations on their own, in a reasonable amount of time. Best use the mystical all-seeing GM powers to synchronize our RP watches, as it were, and force all characters into the same relative in-RP time. :)
[/quote]

Actually I've thought about suggesting this idea too, but I think it has it's whole set of disadvantages. With things like these, either way you go, you're gonna make things worst for someone, specially those few who choose to play it solo. The only point in enforcing a common time for all characters would be if there was some sort of event like a raid call or large player reunion where all PC PCs where required to participate. Other than that, the most sensible way, would be to let people do as they please (within a reasonable margin, of course) and require everyone to state their current day/time at the top of their IC posts, 'cause even an hour between two player can screw things royally if that's whar you're worried about and not everyone will follow in the same pace. It's a very common literary device and in games with this much players acting on their own, it's the most sensible way to deal with the time issue.