title: How to set default value of ion-datetime element?
body: <p>I've set up my datetime picker like this:</p>
  
  <pre><code>&lt;ion-item&gt;
      &lt;ion-datetime displayFormat="h:mm a" pickerFormat="h mm a" minuteValues="0,15,30,45" [(ngModel)]="whInput"&gt;&lt;/ion-datetime&gt;
  &lt;/ion-item&gt;
  </code></pre>