Technical data
Setting System Time
6.3 Setting Time Zone Information on OpenVMS VAX Systems
3. The system displays areas with different time zones and asks you to select
your area. Enter a number, for example, 6:
US Time Zone Menu
1) Alaska 4) Central 7) Hawaii 10) Mountain
2) Aleutian 5) East-Indiana 8) Indiana-Starke 11) Pacific
3) Arizona 6) Eastern 9) Michigan 12) Samoa
0) None of the above
Select the number above that best describes your location: 6
4. Confirm the displayed information or enter another number after the
following prompt; for example:
You selected US/Eastern as your time zone.
Is this correct? (Yes/No) [YES]:
Return
When you confirm the last statement, the system redefines the following
system logical names:
•
sys$localtime
•
sys$posixrules
The Compaq C RTL uses these logical names to compute the time zone
rules for your applications. The system also writes this information to
SYS$TIMEZONE.DAT. The system uses this file to reset SYS$LOCALTIME
and SYS$POSIXRULES when you reboot.
The system then displays the TDFs for standard and daylight saving time
that correspond to the time zone you have selected:
Default Time Differential Factor for standard time is -5:00.
*Default Time Differential Factor for daylight saving time is -4:00.
* The system displays daylight saving time only for time zones that use
daylight saving time.
6.3.2 Setting the TDF on Your System
If you answer TDF or BOTH to the time parameter question at the beginning
of the command procedure, the system displays prompts for the TDF on your
system.
To set the TDF, answer the following questions:
1. Select option 2 to display the TDF the system has calculated for you:
Configuring the Time Differential Factor (TDF)
Enter ? anytime for help
[0] Exit
[1] Set the Time Differential Factor
[2] Display the Time Differential Factor
Please pick an option number [2]: 2
The system displays information similar to the following items:
SYSTEM TIME DIFFERENTIAL FACTOR = -4:00 (-14400 seconds).
LOCAL SYSTEM TIME = 22-JAN-2001 10:49:45.20.
Setting System Time 6–11