D3 & Linux time does not match

I'm having a problem getting d3 and linux time values to match and to
stay matched.

For example: current linux time=10:30AM
I do a tcl command... set-time 10:30:00 (u

I then verify that both time values match...then next day I do a tcl
command... time & d3 time is exactly one hour behind linux
time....linux time is right...d3 time is wrong

I am using ntp.

Thanks,
Richard