Setting the time zone (QTIMZON) system value
You can set the QTIMZON system value before upgrading i5/OS® software, during an initial program load (IPL), or after the installation using iSeries™ Navigator.
The method that you use depends on whether you are upgrading from a previous i5/OS release, or installing the i5/OS operating system. Otherwise, you can always work with the time zone using iSeries Navigator.
If a change to a different time zone description results in a different offset, the change will cause the local system time, system value QTIME, to change. In addition, the system value QUTCOFFSET will change to match this new offset.
- Setting the time zone before upgrading
If you have a previous release of the i5/OS operating system installed and are upgrading to i5/OS V5R3, or later, you need to set the time zone before your system is upgraded to the new release. This is the preferred method because your time zone can be set correctly as soon as the upgrade is complete.- Setting the time zone during an attended IPL
You can set the time zone system value during an attended initial program load (IPL) of the i5/OS operating system. This is the preferred method if you are installing software on a new system or partition because it ensures that the time zone can be set correctly as soon as you complete the IPL.- Setting the time zone after an IPL
You can use iSeries Navigator to change the time zone system value after an initial program load (IPL). You can also use this method to ensure that the time zone is set properly if the offset from Coordinated Universal Time (UTC) was not correct during the upgrade or installation of i5/OS software.
Parent topic:
Setting up time managementPrevious topic: Examining your network of systemsNext topic: Setting up time maintenanceRelated concepts
Managing time zones