When setting up a scheduled job for a Queue process, you have the option of setting the schedule type to "One time." When using this option, setting the time for the job to run, and saving, the time resets to 12:00am.
Download and install the latest patch which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.
Steps to Duplicate
Go to the Administration functional area
Select an existing process (or add one)
Select the Job Schedules tab
Enter a Job name
Select the Schedule type of One time
Enter a data and time (any time other than 12:00am)