title: Applescript or Terminal : Add a event on calendar
body: <p>I try to make a calendar event from terminal, </p>
  
  <p>here is my code </p>
  
  <pre><code>tell application "Calendar"
      activate
      tell calendar "Calendar"
          set theCurrentDate to current date
          make new event at end with properties {description:"Event Decription", summary:"Event Name", location:"Event Location", start date:theCurrentDate, end date:theCurrentDate + 510 * minutes}
      end tell
      reload calendars
  end tell
  </code></pre>
  
  <p>It's doing the job but it's really slow, and need to open calendar,
  any faster way to do it, if possible without opening calendar ?</p>
  
  <p>Thank you </p>