Time Zone change in hp unix :- How to??

To change the timezone system wide, execute the following:

1. # /sbin/set_parms timezone

2. When the menu appears, select the appropriate value

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1. Edit file /etc/TIMEZONE in order to have in it needed timezone (TZ).

2. If you need to configure transition to daylight saving time and back
   edit the file /usr/lib/tztab.

Note: After /etc/TIMEZONE update the computer should be rebooted