title: Ionic 2 - Setting min and max attribute to ion-datetime
body: <p>I know this seems easy, but I could not find any answers for my question.</p>
  
  <p>How can I set the min and/or max attributes to ion-datetime, but only for time picker?</p>
  
  <pre><code>&lt;ion-row&gt;
      &lt;ion-col no-padding&gt;
          &lt;ion-item no-padding&gt;
              &lt;ion-label floating&gt;Time In:&lt;/ion-label&gt;
              &lt;ion-datetime pickerFormat="hh:mm A" [(ngModel)]="ptReEvaluation.content.iprTimeIn"&gt;&lt;/ion-datetime&gt;
          &lt;/ion-item&gt;
      &lt;/ion-col&gt;
  &lt;/ion-row&gt;
  </code></pre>