Setting the system date and time

The system date and time be set with various tools.

Attention: Customer applications may be sensitive to system date and time settings. Incorrect date and time settings may cause data loss. Ensure that the customer knows the date and time that you have set.

Note: If the system is logically partitioned, then you must use the Advanced System Management Interface (ASMI) to set the system date and time. For information on using ASMI to set the system date and time, see Changing the time of day.

Use one of the following methods to set the date and time:

If the system is powered off, perform a Manual mode (attended) IPL. You can set the date and time on the IPL Options display.
If the system is powered on, perform the following procedure:
1. To set the correct date, enter the system command:
  CHGSYSVAL QDATE VALUE('mmddyy')
  
  where:
  mm = month
  dd = day
  yy = year
2. Press Enter.
  Note: This sample uses the month, day, and year format. To determine the format for your system, enter DSPSYSVAL QDATE.
3. To set the correct time, enter the system command:
  CHGSYSVAL QTIME VALUE('hhmmss')
  
  where:
  hh = 24-hour time
  mm = minutes
  ss = seconds
4. Press Enter. This ends the procedure.