title: How to run django-cron job in exact time
body: <p>I can't use celery in my project, only django-cron.
  I need to run my task 2 times a day:</p>
  
  <ul>
  <li>at 11:59 A.M.</li>
  <li>at 11:59 P.M.</li>
  </ul>
  
  <p>Can I do it?
  I found only RUN_EVERY (in mins or secs) variable. </p>