A: 

Can't you use the PHP time() object for this? Pass this value:

time()."000" // note the trailing zeroes

Call that serverTime and pass it as a query string:

echo "myFlashFile.swf?serverTime=".time()."000";

Then in your Actionscript:

myDate = new Date();
myDate.setTime(serverTime);
Chat Clussman
I need to know the time in that particular timezone
jimbo
A: 

Would some sort of mathematics solve the day? ie:

$time = date("U")+date("Z");

This would work for the timezone ahead, but not so good for behind

jimbo