The calendar will display above the input if it's close to the bottom of the page, and can be closed by clicking elsewhere or pressing the ESC key.
<input ng-utc-datepicker ng-model="vm.date"/>
<span id="icon" class="fa fa-calendar"></span>
<input ng-utc-datepicker
data-trigger="icon"
ng-model="vm.date"/>
<input ng-utc-datepicker
data-trigger="btn-text"
data-format="MM/DD/YYYY HH:mm:ss"
ng-model="vm.date"/>
<button id="btn-text">Show Calendar</button>