The EVENT command is used to notify users of coming events;
notification is given right away and then again the day before and
the day of the event.  To enter an event notice, use the command:
  EVENT <date>
then follow instructions (<date> is the date of the event).

For more information, see the file MAIL.BH[UP,DOC].  For information
about editing an EVENT notice later, see RCV.BH[UP,DOC].