System time is one hour ahead of ntp server :AIX

Problem : System time is one hour ahead even ntp sync is proper.

Observation: I stoped the ntp client and set the time manually using date command .The moment i do an ntpdate to the time server system time jumps to one hour ahead.All other ntp clients were fine and were showing proper time.So this should be a problem with this particular client.

Client OS details: AIX 7.1

From the problematic client:

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bash-4.2# date

Mon Mar 17 19:51:33 IST 2014           =>Time showing 19:51 which was 1 hour ahead that of  ntp server.

bash-4.2# date 031718512014             =>Set time manually.

Mon Mar 17 18:51:33 IST 2014          

bash-4.2# ntpdate  192.168.1.100             where 192.168.1.100 is my ntp server.

17 Mar 19:51:34 ntpdate[12386500]: adjust time server 192.168.1.100 offset  3600.479108

Please notice time is getting set to one hour ahead.

bash-4.2#date

Mon Mar 17 19:51:35 IST 2014

IST  word at the date command output gave an impression that Time zone is IST(GMT+5:30). But it was not true when checked the time zone.

bash-4.2# echo $TZ

IST-5:30IST

So changed the time zone to Asia/Kolkata(GMT+5:30) using smitty and restarted the system to effect the new Time zone.

smitty-->System Environments-->Change / Show Date and Time-->Change Time Zone Using System Defined Values-->Select Asia/Kolkata from the list-->Enter-->Enter -->Exit (F10)

Then took a reboot.

bash-4.2# shutdown -Fr

Once the system is back everything will be fine.