DST Change for AIX

For systems using the Time Zone (TZ) variable to
adjust for Daylight Savings Time (DST), a manual
adjustment may be needed to cover the changes made
by the local Goverment for timezone variable.

To manually set the TZ variable.
If you do change the Time Zone (TZ) variable,
any changes made to the time zone will NOT fully
take effect until the next system
boot.

This change can be made with the chtz command, through
smit "smit chtz" or by editing the /etc/environment
file.

In SMIT 1. smitty chtz 1. Answer "1 yes" to "Use Daylight Savings Time?" 2. Select your TZ variable Example: AEST-10AEDT Change Time Zone Type or select values in entry fields. Press Enter AFTER making all desired changes. [Entry Fields] Time zone AEST-10AEDT Day Light Savings Time Offset from CUT([+]HH:MM: [] SS) Start Daylight Savings Day([Mmm.ww.dd]) [M10.1.0] Start Daylight Savings Time(HH:MM:SS) [02:00:00] Stop Daylight Savings Day([Mmm.ww.dd]) [M4.1.0] Stop Daylight Savings Time(HH:MM:SS) [03:00:00]

Notes After making this change kill/stop/restart " cron ", so that it will pick up the new TZ when it is automatically restarted by init. Other applications that rely on TZ would also need to be restarted or users should log out and back in to pick up the change. A reboot, while probably not essential, would ensure that all processes pickup the change. If a reboot does not occur, then every process which was running prior to the change will continue to use the older value. For further information or if you have any problems utilizing this information, feel free to log a software support call.

Other platforms

Australian DST change for 2008