I thought I'd give a little more explanation -- if nothing else, maybe this will make it obvious where I went wrong.
If you go back to my example of the straight road between church towers two miles apart, imagine you stand at the point where you hear one chime a second before the other. If you recorded the sound, saved it to an SD card and sent it by carrier pigeon to your friend in Timbuktu, your friend could listen to the recording and calculate exactly where you stood on the road when you recorded it. But even if he knew that the those particular notes were played only at 11:15 AM on November 11, he couldn't work out the time in Timbuktu unless he knew something about the speed of a carrier pigeon.