title: Crontab Day of the Week syntax
body: <p>In crontab does the Day of the Week field run from <code>0 - 6</code> or <code>1 -7</code>?</p>
  
  <p>I am seeing conflicting information on this.  wikipedia states <code>0-6</code> and other sites I have seen are <code>1-7</code>.</p>
  
  <p>Also what would be the implication or either using <code>0</code> or <code>7</code> incorrectly?  i.e. would the cron still run?</p>