Date and time system values: Time zone

The Time zone system value is also known as QTIMZON. This system value specifies the time zone information used to calculate the local system time. All current settings contain either the standard time or daylight saving time (DST) values depending on whether DST is in effect.

Note: If a change to a different time zone description results in a different offset, the change causes the local system time, system value QTIME, to change. In addition, the system value QUTCOFFSET changes to match this new offset.
Quick reference
Location From IBM® Navigator for i, select Configuration and Service > Time Management. Right-click on Time Zones and click Open.
Special authority All object (*ALLOBJ).
Default value Determined by the system. For more information, see Initial time zone setting.
Changes take effect Immediately.
Lockable No.

What can I do with this system value?

You can specify the time zone to be used on the system. You can select an IBM-supplied time zone or create your own. The time zone specifies the following time zone information:

  • Offset from UTC
  • Standard time names
  • DST names
  • DST start
  • DST end
  • Year offset
    Note: The Year offset information is not shown on systems running IBM i V5R4, or earlier. It is also not shown if the value is zero.

You can access the Time zone system value from two locations in IBM Navigator for i. To view the current time zone, select Configuration and Service > System Values. Right-click on Date and Time and click Properties, then switch to Time tab. To work with the time zones, select Configuration and Service > Time Management. Right-click on Time Zones and click Open.

You can use the time management function of IBM Navigator for i to work with this system value. Using the time management function, you can identify a time zone for the system to use. You can also identify a time maintenance application to synchronize your system time with an external time source.