Help needed with time function

Hi, I’m trying to make a clock that shows different times for different countries. here is the code for the clock but how do I make it show the time x hours forward or back?

onClipEvent (enterFrame) {
time = new Date();
mil = time.getMilliseconds();
s = time.getSeconds();
m = time.getMinutes();
h = time.getHours();
seconds._rotation = s6+(mil/(1000/6));
minutes._rotation = m
6+(s/10);
hours._rotation = h*30+(m/2);
}

cheers