On Mon, Oct 25, 2010 at 02:51:24AM +1100, Ben McGinnes wrote: > > How do you knew that your local NTP server knew what time it is? (for sure) > > By polling as many stratum 1 and 2 time servers as possible. Having > your own stratum 2 server(s) beats nebulous NTP servers out in the big > bad Internet every time. For those you care about that: http://leapsecond.com/time-nuts.htm