[SideQuark]

There is no such thing as "exact same time" due to relativity. The most perfect of clocks in use on the planet will drift, and both are correct.

Mail an atomic clock easy to west, and a different one west to east, and they'll drift different amounts. Put one in a plane, it will disagree with one on the ground. Put one on a mountain, it will disagree with one at sea level. Put one at the pole, it will differ with one on the equator.

There is little sense in claiming one time is exactly equal to another. Close to some tolerance is useful.