It's still relative. I think...

If you could have a atomic wristwatch and you travel around the world with it, you will have a very precise time for you, but you'll end up out of sync with almost every other atomic clock.

If you sync two atomic clocks and put one at the surface of the arctic ocean and another one on top of Mount Nevado in Peru, and leave them there for one million years, the clock in Peru will be 1.88 years ahead of the clock in the arctic.

That is a difference of 0.44 nanoseconds per day.

Don't quote me on that though.. I'm not a physicist.