Back down on earth, though, most computer time has drift anyway. Very few devices need super precise time (GPS does, for example, because of relativity). Your h

Back down on earth, though, most computer time has drift anyway. Very few devices need super precise time (GPS does, for example, because of relativity). Your home computer is subject to network time fluctuations +/- some number of milliseconds. Like NTP over the internet is only accurate down to a few tens of milliseconds. If you have two databases running on two different computers, there's no guarantee their timestamps are in sync relative to each other or relative to a particular atomic clock's epoch. Is it within a second? Probably, on a modern operating system. Same millisecond? Very unlikely.