title: Mongoose store Date without Time
body: <p>I need to store my Date in mongoose without time
  This is how i defined in mongoose model schema</p>
  
  <pre><code>created_at : {type: Date, default: Date.now}
  </code></pre>
  
  <p>While am using this, am getting date with time. How can i store only date in mongoose without time</p>