Use cron to sync time using ntp
Sync the Time once a day at 2.00 0 2 * * * /usr/sbin/ntpdate -s -b -p 8 -u /usr/sbin/ntpdate -s -b -p 8 -u 129.132.2.21
ps aux | grep time
Sync the Time once a day at 2.00 0 2 * * * /usr/sbin/ntpdate -s -b -p 8 -u /usr/sbin/ntpdate -s -b -p 8 -u 129.132.2.21