Time Library Organisation

Ashley Yakeley ashley at semantic.org
Wed Jan 26 07:29:45 EST 2005

In article <41F77995.9070700 at imperial.ac.uk>,
 Keean Schupke <k.schupke at imperial.ac.uk> wrote:

> My vote goes for a TAI style time,

TAI time isn't usually available. System clocks are usually set to "Unix 
time", which is almost, but not quite, isomorphic with UTC. Sometimes 
they're set to a timezone-adjusted variant.

I think conventional "best practice" is to have the system clock set to 
Unix time, synchronised by NTP. Together with its "leap-second bit", set 
for the day that will have the extra second, NTP time is unambiguous, 
even if Unix time isn't. This explains how NTP works with leap-seconds:


> in milliseconds

This is not fine enough. The current System.Time uses picoseconds, for 

Ashley Yakeley, Seattle WA

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