title: Running a cron at 4 am and 4 pm
body: <p>The following cron expression <code>cron(0 14 ? * MON-FRI *)</code> basically runs something 4:00 pm from Monday to Friday.</p>
  <p>I am wondering if it is possible to modify the expression so I can run something at 4:00 am and 4:00 pm every Monday to Friday.</p>