prova con ntpdate ntp.ien.it

ps: controlla le impostazioni del time zone
more /etc/sysconfig/clock
# The ZONE parameter is only evaluated by system-config-date.
# The timezone of the system is defined by the contents of /etc/localtime.
ZONE="Europe/Rome"
UTC=true
ARC=false

eventualmente utilizza il tool /usr/sbin/timeconfig


good lucky!