Change time zone in aix

Stop xntp service if your server is an ntp client.

# stopsrc -s xntpd
Change time zone to IST CUT +5:30 using command

# chtz IST-5:30
Login/logout. nullify your drift file after taking a backup

# > /etc/ntp.drift

Set correct time using

# smitty date
Restart xntpd

# startsrc -s xntpd