Originally Posted by Fat Misdreavus
I would imagine that using a website with the official time (for the US, it's www.time.gov
) would be helpful. You could manually sync the time on your DS clock with the official time (within the correct second), then use the website to effectively monitor the time on the DS clock.
Since I think there is going to be a lot of time changing it (to times that are not correct) would probably be just as well to change the second hand on your PC to that of the DS and at least know when you are within a certain minute, which should be good enough for our purposes.