Ubuntu time issues
Solution 1:
You don't want to run NTP or NTPDATE on a virtual machine. It should get its time from the system clock.
Check the UTC value in /etc/default/rcS. Try setting it from no to yes or vice-versa.
While you are at it add an exit 0 line to /etc/default/ntp. Alternatively set the NTPOPTION value to "-q". This will disable NTP on the virtual server.
Solution 2:
Have you tried using an NTP server that is on the same Time Zone as you?
Does # /etc/init.d/ntp restart give you the same issue of your hardware clock changing?