Ironically, the earth's rotational stability isn't near as good.
You'll STILL have to set your terrestrial clock to account for the
long term errors.

More than you ever wanted to know about time...
http://www.daily-tangents.com/TimeZone/

Russell McMahon wrote:
>
> NASA
> Quantum entanglement to improve accuracy of atomic clocks
>
> http://science.nasa.gov/headlines/y2004/23jan_entangled.htm?list834808
>
> Theory only so far.
> Posited accuracies of as good as 1 second in 30 million years. (1 part in
> 10^15)
>
> ___________________
> Source: Arocket post

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