Technical data

Setting System Time
6.2 Setting Time Zone Information on OpenVMS Alpha Version 7.3 and Later
If you answer Yes, the following is displayed:
Enter the time adjustment value you would like to add to
the local time. You can enter hours only (hh) or hours and
minutes (hh:mm) The value can be positive (hh:mm or +hh:mm)
or negative (-hh:mm).
You are then asked to enter the time adjustment, usually either -1:00 or +1:00.
Enter the time adjustment value: -1:00
Finally, the TDF and the time adjustment (if any) is displayed, and you are asked
to confirm that they are correct.
NEW SYSTEM TIME DIFFERENTIAL FACTOR = -4:00
ADDING -1:00 TO THE LOCAL TIME.
Is this correct? [Y]:
If you answer Yes, the TDF is set, and the system logical name
SYS$TIMEZONE_DIFFERENTIAL is defined.
If you answer No, you are returned to the TDF information display, from which
you can reenter your TDF and time adjustment choices.
6.3 Setting Time Zone Information on OpenVMS VAX Systems
This section presents instructions for setting time zone information on OpenVMS
VAX and on OpenVMS Alpha prior to Version 7.3. For instructions about setting
time zone information on OpenVMS Alpha Version 7.3 and later, see Section 6.2.
You use the command procedure SYS$MANAGER:UTC$TIME_SETUP.COM to
set time zone information, including:
• Setting your local time zone, your TDF, or both
• Modifying your system’s local time to adjust for daylight saving or standard
time
• Displaying the local time and TDF for your system
If you set the time zone and the TDF on one node in a cluster, the values you set
take effect on other nodes in the cluster when those nodes are rebooted.
For your convenience, the instructions for using the command procedure have
been split into two sections:
• Setting the time zone
• Setting the TDF
Beginning the Procedure
To use SYS$MANAGER:UTC$TIME_SETUP.COM, follow these steps:
1. Log in to the SYSTEM account or enter the following command to enable
LOG_IO and OPER privileges:
$ SET PROCESS/PRIVILEGES=(LOG_IO,OPER)
2. Enter the following command to start UTC$TIME_SETUP.COM:
$ @SYS$MANAGER:UTC$TIME_SETUP.COM
%UTC-I-UPDTIME, updating Time Zone information in SYS$COMMON:[SYSEXE]
Setting System Time 6–9