From Redhat type : date then enter the CMOS setup by typing : Fn F1 (purple lettering on keyboard Exit setup by typing : Esc (key) Get date by typing at the shell prompt : date and presto the system time has advanced by 2 hours or whatever your timezone is.
It sounds like an interaction between the kernel and the APM BIOS - most likely because the kernel is set that 'hardware clock is in GMT'. Change the kernel setting and try recompiling the kernel.