I was having the same problem too. I live in the USA in Central Time zone. What I did to solve the problem was to go into PCLOS Control Center, go to System, Manage System Services, scroll down till you find ntpd, put a check mark in the box next to On Boot and then click Start. After you close out of that window, then go to Set Date and Time, then put a check mark into the box titled Enable Network Time Protocol and then select the correct server, then set the correct time and the correct time zone, then click Ok. Close out of that window and then reboot. This seemed to correct the problem for me and I have not experienced it since ( knock on wood ). I have been using the PCLOS 2010 beta version and have been updating it through Synaptic. Maybe I should re-install with the final version.
Hope this helps.