VMS Help SET, ENTRY, Qualifiers, /AFTER  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /AFTER=time
       /NOAFTER

    Requests that the specified job be held until after a specific
    time. If the specified time has already passed, the job is
    scheduled for processing.

    You can specify either absolute time or a combination of absolute
    and delta times. For complete information on specifying time
    values, refer to the OpenVMS User's Manual or the online help
    topic DCL_Tips (subtopic Date_Time).

                                   NOTE

       Releasing or rescheduling a job before its submission time
       is not supported for security reasons. Therefore, if you set
       the system time to a future time and submit a job on a node
       where the queue manager is running, you cannot release or
       reschedule that job back to the present time if you reset
       the system time.

       For example, you can set the system time to a future time of
       January 1, 2020 and submit a job to run on January 9, 2020;
       however, if you set the system time back to the present time
       and try to release the job to the present time, the job will
       be released to January 1, 2020.

       This situation impacts the following qualifiers: /AFTER,
       /NOHOLD, and /RELEASE.

    To specify /AFTER for a job on hold, you must also specify
    /NOHOLD in order to cause the job to be held only until the
    specified time. Jobs can be released before the specified time
    by using the /NOAFTER or /RELEASE qualifier with the SET ENTRY
    command.