IEA888A [UTC DATE=yyyy.ddd,CLOCK=hh.mm.ss] LOCAL DATE=yyyy.ddd,CLOCK=hh.mm.ss REPLY U, OR UTC/LOCAL TIME
This message displays the following:
- The local time and date
- The Coordinated Universal Time (UTC) and date
In the message text:
- The year (4 digit year: 1900 - 2042) and the day (001-366).
- The hour (00-23), minute (00-59), and second (00-59).
The system prompts the operator for a reply.
Note: The system automatically issues message IEA888A at IPL time if TOD=PROMPT is included in the active CLOCKxx member of SYS1.PARMLIB. See the z/OS MVS Initialization and Tuning Reference for details.
If the values shown in the text of message IEA888A are acceptable, reply 'U'. If you want to change the value of the time-of-day (TOD) clock, enter a new date, time, or both as follows:
If you want to change the value of the local clock, enter a new date, time, or both as follows:
Note: The apostrophes in the above replies are optional.
If you specify a different TOD clock setting, the system issues message IEA903A. If you omit 'UTC|GMT', the system assumes the local date and/or time. Once you have set the new time and/or date, the system reissues message IEA888A with new values. Reply to the message as previously described.
- Resetting UTC or GMT time causes the TOD clock to be reset. It also affects the local time. Respecifying UTC or GMT time causes the local time value to be recalculated using the new UTC or GMT and the system time zone constant.
- Resetting local time does not affect UTC or GMT time or the TOD clock. However, it will cause the system time zone constant (which is initialized at IPL from the CLOCKxx member of SYS1.PARMLIB) to be recalculated. The new time zone constant will remain in effect until either local time is modified again or the next IPL. If message IEA888A indicates that both UTC or GMT and local time values are incorrect, always reset the UTC or GMT values first.
- The TOD clock should be set to a value based on zero being equivalent to 00 hours, 00 minutes, 00 seconds on January 1, 1900 UTC or GMT. During an IPL, the TOD clock might contain a value that, relative to this base, is not correct. This can happen, for example, when a customer engineer (CE) left the clock in the error state. In this case, to ensure that the local time and date are correct, specify UTC or GMT before setting the local time and date.