We changed a job to EXEC=NO so it wouldn't run. but when we do a LJOB,JOB=JOBNAME the LAST RUN DATE/TIME still shows that it ran, days after we changed it to EXEC=N. Even though the job didn't actually run.
Release : 12.1
It doesn't matter if the job has EXEC=NO or YES we will always update the LAST RUN DAT/TIME field.