IBM recommends that you specify the system time zone before you upgrade to the new release. This ensures that your system time is set properly as soon as the upgrade is complete.
Time management allows you to manage time on your server. Within the time management component of iSeries™ Navigator, you can work with the time zone and time adjustment functions. You can set the time zone on your system either before you upgrade, during an attended IPL, or after an IPL. The iSeries Information Center topic Setting the time zone before upgrading includes instructions for creating the data area before you upgrade.