When a official time changes what's happend in real time ?

[Sébastien WILLEMIJNS]

Hello,

When a TZ change in France in the middle of the night i sleep so i have 
never see if hour change in real time...

I see on 
http://en.wikipedia.org/wiki/Network_Time_Protocol#Microsoft_Windows
than W32TIME can have an 1-2 second error..

is http://www.meinberg.de/english/sw/ntp.htm is more precise ?

Have a nice day/night ;)