The time on your iSeries Linux partition is way off.
To fix this problem edit the /etc/rc.config file and make the following changes:
In /etc/rc.config set START_XNTP to yes.
In /etc/rc.config enter the name of IP of a time server for XNTPD_INITIAL_NTPDATE.
Then run "hwclock --systohc" to update the hardware clock.
After you have taken the above steps you hardware and system clocks should stay reasonably accurate.